Outputs (49)

2D Mesoscale cracking simulation of partially saturated asphalt based on moisture diffusion and a cohesive zone model (2023)
Journal Article
Li, L., Wu, J., Thom, N., Hargreaves, D., Airey, G., Zhu, J., …Zhang, Z. (2023). 2D Mesoscale cracking simulation of partially saturated asphalt based on moisture diffusion and a cohesive zone model. International Journal of Pavement Engineering, 24(1), Article 2242557. https://doi.org/10.1080/10298436.2023.2242557

The primary objective of this paper was to develop a combined model that incorporates moisture diffusion and a cohesive zone model, addressing anisotropic and loading-rate dependent cracking within partially saturated asphalt. Utilising X-ray CT scan... Read More about 2D Mesoscale cracking simulation of partially saturated asphalt based on moisture diffusion and a cohesive zone model.

Engineering characterization and environmental analysis of natural rubber latex modified asphalt mixture (2023)
Journal Article
Suwarto, F., Parry, T., Thom, N., Airey, G., Abed, A., Rahman, T., & Wititanapanit, J. (2023). Engineering characterization and environmental analysis of natural rubber latex modified asphalt mixture. Construction and Building Materials, 402, Article 132970. https://doi.org/10.1016/j.conbuildmat.2023.132970

Natural Rubber Latex (NRL) has attracted considerable interest as a resource for renewable paving materials due to its potential to lessen environmental impact. In order to gain a thorough understanding of the performance of NRL, this study evaluated... Read More about Engineering characterization and environmental analysis of natural rubber latex modified asphalt mixture.

Analysis and Prediction of Pothole Formation Rate Using Spatial Density Measurements and Pavement Condition Indicators (2023)
Journal Article
Abed, A., Rahman, M., Thom, N., Hargreaves, D., Li, L., & Airey, G. (2023). Analysis and Prediction of Pothole Formation Rate Using Spatial Density Measurements and Pavement Condition Indicators. Transportation Research Record, 2677(11), 651-664. https://doi.org/10.1177/03611981231166684

Potholes represent one of the dangerous distress types on roads. They form as a result of various factors, including water ingress, freeze–thaw, and pavement condition deterioration. In the UK, 1.7 million potholes were repaired in 2021; this critica... Read More about Analysis and Prediction of Pothole Formation Rate Using Spatial Density Measurements and Pavement Condition Indicators.

A Review of Numerical Models for Slab-Asphalt Track Railways (2022)
Journal Article
Atalan, M., Prendergast, L. J., Grizi, A., & Thom, N. (2022). A Review of Numerical Models for Slab-Asphalt Track Railways. Infrastructures, 7(4), Article 59. https://doi.org/10.3390/infrastructures7040059

Higher train speeds and heavier axle loads trigger elevated stresses and vibrations in the track, potentially increasing track deterioration rates and maintenance costs. Alternative track forms made of combinations of reinforced concrete and asphalt... Read More about A Review of Numerical Models for Slab-Asphalt Track Railways.

Characterisation of fatigue damage in asphalt mixtures using X-ray computed tomography (2022)
Journal Article
Chen, A., Airey, G., Thom, N., & Li, Y. (2022). Characterisation of fatigue damage in asphalt mixtures using X-ray computed tomography. Road Materials and Pavement Design, https://doi.org/10.1080/14680629.2022.2029756

The high-resolution X-ray CT was applied to investigate the fatigue damage evolution of asphalt mixtures. The detailed Xray CT images in the centre of the samples were used to characterise the fatigue cracking and air voids increase at different vert... Read More about Characterisation of fatigue damage in asphalt mixtures using X-ray computed tomography.

Modelling the stiffness development in asphalt concrete to obtain fatigue failure criteria (2021)
Journal Article
Chen, A., Airey, G. D., Thom, N., Litherland, J., & Adjetey Nii-Adjei, R. (2021). Modelling the stiffness development in asphalt concrete to obtain fatigue failure criteria. Construction and Building Materials, 306, Article 124837. https://doi.org/10.1016/j.conbuildmat.2021.124837

The study of fatigue is critical to good usability and durability of asphalt pavements. Inaccurate calculation of the fatigue failure criteria can cause incorrect evaluation of the fatigue performance, leading to inaccurate prediction of the pavement... Read More about Modelling the stiffness development in asphalt concrete to obtain fatigue failure criteria.

Stiffening Effect of Fillers Based on Rheology and Micromechanics Models (2021)
Journal Article
Rahim, A., Milad, A., Yusoff, N. I. M., Airey, G., & Thom, N. (2021). Stiffening Effect of Fillers Based on Rheology and Micromechanics Models. Applied Sciences, 11(14), Article 6521. https://doi.org/10.3390/app11146521

The aggregate in an asphalt mixture is coated with mastic consisting of bitumen (dilute phase) and filler (particulates phase). The interaction of bitumen and filler and packing of filler plays an important role in the properties of mastics. The micr... Read More about Stiffening Effect of Fillers Based on Rheology and Micromechanics Models.

Thermo-rheological analysis of WMA-additive modified binders (2020)
Journal Article
Abed, A., Thom, N., Lo Presti, D., & Airey, G. (2020). Thermo-rheological analysis of WMA-additive modified binders. Materials and Structures, 53(3), https://doi.org/10.1617/s11527-020-01480-1

Thermo-rheological characteristics of unmodified and modified bitumen have significant impacts on the mechanical response of asphalt. This study investigates the impacts of an organic and a chemical Warm Mix Asphalt additive on bitumen thermo-rheolog... Read More about Thermo-rheological analysis of WMA-additive modified binders.

Warm mix asphalt (WMA) for rapid construction in airfield pavement (2020)
Journal Article
Rahman, T., Dawson, A., & Thom, N. (2020). Warm mix asphalt (WMA) for rapid construction in airfield pavement. Construction and Building Materials, 246, https://doi.org/10.1016/j.conbuildmat.2020.118411

© 2020 Elsevier Ltd Warm-mix asphalt (WMA) is commonly mixed and compacted 15°C to 30°C below that of conventional hot mix asphalt (HMA). The lower production temperature of WMA is expected to give an advantage of a lower cooling time of newly laid a... Read More about Warm mix asphalt (WMA) for rapid construction in airfield pavement.

Microstructure and mechanical properties of fibre reinforced asphalt mixtures (2020)
Journal Article
Mohammed, M., Parry, T., Thom, N., & Grenfell, J. (2020). Microstructure and mechanical properties of fibre reinforced asphalt mixtures. Construction and Building Materials, 240, Article 117932. https://doi.org/10.1016/j.conbuildmat.2019.117932

Conventional asphalt mixtures can perform satisfactorily in most flexible pavement and airfield applications. However, during recent years the trend has been towards traffic growth, severe climate conditions, and heavier loads. This allied to durabil... Read More about Microstructure and mechanical properties of fibre reinforced asphalt mixtures.

Data Compression Approach for Long-Term Monitoring of Pavement Structures (2019)
Journal Article
Manosalvas-Paredes, M., Lajnef, N., Chatti, K., Aono, K., Blanc, J., Thom, N., …Lo Presti, D. (2019). Data Compression Approach for Long-Term Monitoring of Pavement Structures. Infrastructures, 5, Article 1. https://doi.org/10.3390/infrastructures5010001

Pavement structures are designed to withstand continuous damage during their design life. Damage starts as soon as the pavement is open to traffic and increases with time. If maintenance activities are not considered in the initial design or consider... Read More about Data Compression Approach for Long-Term Monitoring of Pavement Structures.

Strategies for reduced cooling time of asphalt for airfield pavement overlay (2019)
Conference Proceeding
Rahman, T., Thom, N., & Dawson, A. (2019). Strategies for reduced cooling time of asphalt for airfield pavement overlay. https://doi.org/10.1061/9780784482476.026

Reducing the cooling period of newly laid asphalt overlays could help airport authorities to quickly open remediated pavements to traffic. This paper reviews four strategies for a reduced cooling period, prior to trafficking, of newly-placed asphalt... Read More about Strategies for reduced cooling time of asphalt for airfield pavement overlay.

Behaviour of rubberised cement-bound aggregate mixtures containing different stabilisation levels under static and cyclic flexural loading (2019)
Journal Article
Farhan, A. H., Dawson, A., & Thom, N. (2019). Behaviour of rubberised cement-bound aggregate mixtures containing different stabilisation levels under static and cyclic flexural loading. Road Materials and Pavement Design, 21(8), 1-20. https://doi.org/10.1080/14680629.2019.1605924

An investigation has been undertaken to investigate the influence of rubber inclusion at different levels of stabilisation on the behaviour of cemented granular mixtures, under static and cyclic flexural testing, and to compare this with mixtures wit... Read More about Behaviour of rubberised cement-bound aggregate mixtures containing different stabilisation levels under static and cyclic flexural loading.

Probabilistic prediction of asphalt pavement performance (2019)
Journal Article
Abed, A., Thom, N., & Neves, L. (2019). Probabilistic prediction of asphalt pavement performance. Road Materials and Pavement Design, 20( Sup 1), S247-S264. https://doi.org/10.1080/14680629.2019.1593229

Variability of pavement design parameters has always been a concern to pavement designers and highway agencies. A robust pavement design should take into account the variability of the design inputs and its impact on the reliability of the design. In... Read More about Probabilistic prediction of asphalt pavement performance.

Development of compression pull-off test (CPOT) to assess bond strength of bitumen (2019)
Journal Article
Rahim, A., Thom, N., & Airey, G. (2019). Development of compression pull-off test (CPOT) to assess bond strength of bitumen. Construction and Building Materials, 207, 412-421. https://doi.org/10.1016/j.conbuildmat.2019.02.093

The quantification of moisture susceptibility has been a major concern for researchers as it adversely affects the performance of asphalt pavements. Several methods have been developed to assess bond strength using asphalt mixtures in loose and compa... Read More about Development of compression pull-off test (CPOT) to assess bond strength of bitumen.

A novel approach for rational determination of warm mix asphalt production temperatures (2018)
Journal Article
Abed, A., Thom, N., & Grenfell, J. (2019). A novel approach for rational determination of warm mix asphalt production temperatures. Construction and Building Materials, 200, 80-93. https://doi.org/10.1016/j.conbuildmat.2018.12.082

Warm Mix Asphalt (WMA) has been developed to minimise environmental impact of asphalt by reducing production temperatures of this material. This study provides a new approach to design WMA production temperatures by two methods. First, aggregate coat... Read More about A novel approach for rational determination of warm mix asphalt production temperatures.

Investigation into the bond strength of bitumen-fibre mastic (2018)
Journal Article
Mohammed, M., Parry, T., Thom, N., & Grenfell, J. (2018). Investigation into the bond strength of bitumen-fibre mastic. Construction and Building Materials, 190, 382-391. https://doi.org/10.1016/j.conbuildmat.2018.09.084

The loss of bond strength in road pavement surfacing due to high traffic loads or moisture is a recurring problem, creating distresses such as ravelling, fatigue and rutting. It is, therefore, important to find a way to prevent or at least delay the... Read More about Investigation into the bond strength of bitumen-fibre mastic.

Design considerations of high RAP-content asphalt produced at reduced temperatures (2018)
Journal Article
Abed, A., Thom, N., & Lo Presti, D. (2018). Design considerations of high RAP-content asphalt produced at reduced temperatures. Materials and Structures, 51(4), Article 91. https://doi.org/10.1617/s11527-018-1220-1

In many countries recycling of reclaimed asphalt pavement (RAP) for road surface layers is limited to a maximum of 10–30%. This is due to technical limitation of common asphalt plant but also to specifications that are still restrictive when it comes... Read More about Design considerations of high RAP-content asphalt produced at reduced temperatures.

Use of bitumen-stabilised ballast for improving railway trackbed conventional maintenance (2018)
Journal Article
D'Angelo, G., Sol-Sánchez, M., Moreno-Navarro, F., Lo Presti, D., & Thom, N. (2018). Use of bitumen-stabilised ballast for improving railway trackbed conventional maintenance. Géotechnique, 68(6), 518-527. https://doi.org/10.1680/jgeot.17.P.022

Despite its many advantages, ballasted track needs frequent maintenance to ensure an adequate quality of service. However, tamping, traditionally used to correct geometry, causes ballast degradation and loosening of the already compacted ballast laye... Read More about Use of bitumen-stabilised ballast for improving railway trackbed conventional maintenance.

Recycled hybrid fiber-reinforced & cement-stabilized pavement mixtures: tensile properties and cracking characterization (2018)
Journal Article
Farhan, A. H., Dawson, A., & Thom, N. (2018). Recycled hybrid fiber-reinforced & cement-stabilized pavement mixtures: tensile properties and cracking characterization. Construction and Building Materials, 179, https://doi.org/10.1016/j.conbuildmat.2018.05.233

Cement-stabilized aggregate mixtures (CSAMs) have been used effectively within semi-rigid pavement structures. However, the sensitivity to cracking under tensile loading is the main problem that may cause a deterioration due to reflection to the over... Read More about Recycled hybrid fiber-reinforced & cement-stabilized pavement mixtures: tensile properties and cracking characterization.

Numerical and experimental predictions of texture-related influences on rolling resistance (2018)
Journal Article
Mansura, D. A., Thom, N. H., & Beckedahl, H. J. (2018). Numerical and experimental predictions of texture-related influences on rolling resistance. Transportation Research Record, doi:10.1177/0361198118776114

To overcome rolling resistance (RR) a typical vehicle on average consumes 4152 MJ/119 L of fuel annually as a result of both vehicle and pavement factors. A slight improvement in surface texture arrangement may therefore decrease fuel consumption b... Read More about Numerical and experimental predictions of texture-related influences on rolling resistance.

Developing the multiple stress–strain creep recovery (MS-SCR) test (2018)
Journal Article
Elnasri, M. M. H., Airey, G., & Thom, N. (in press). Developing the multiple stress–strain creep recovery (MS-SCR) test. Mechanics of Time-Dependent Materials, https://doi.org/10.1007/s11043-018-9387-y

While most published work from Europe has been concerned with evaluating binders’ resistance to rutting based on their stiffness (deformation resistance), work originating in the US has mainly been concerned with ranking binders based on their recove... Read More about Developing the multiple stress–strain creep recovery (MS-SCR) test.

Damage propagation rate and mechanical properties of recycled steel fiber-reinforced and cement-bound granular materials used in pavement structure (2018)
Journal Article
Hilal Farhan, A., Dawson, A., & Thom, N. (2018). Damage propagation rate and mechanical properties of recycled steel fiber-reinforced and cement-bound granular materials used in pavement structure. Construction and Building Materials, 172, 112-124. https://doi.org/10.1016/j.conbuildmat.2018.03.239

Cement-bound granular mixtures (CBGMs) represent an attractive option to increase load-carrying capacity and sustainability in highway construction. However, reflection cracking of overlying pavement layers due to the low tensile strength of CBGMs re... Read More about Damage propagation rate and mechanical properties of recycled steel fiber-reinforced and cement-bound granular materials used in pavement structure.

Linear viscous approach to predict rut depth in asphalt mixtures (2018)
Journal Article
Al-Mosawe, H., Thom, N., Airey, G., & Albayati, A. (in press). Linear viscous approach to predict rut depth in asphalt mixtures. Construction and Building Materials, 169, https://doi.org/10.1016/j.conbuildmat.2017.11.065

Rutting in asphalt mixtures is a very common type of distress. It occurs due to the heavy load applied and slow movement of traffic. Rutting needs to be predicted to avoid major deformation to the pavement. A simple linear viscous method is used i... Read More about Linear viscous approach to predict rut depth in asphalt mixtures.

Novel performance-based technique for predicting maintenance strategy of bitumen stabilised ballast (2017)
Journal Article
D'Angelo, G., Bressi, S., Giunta, M., Lo Presti, D., & Thom, N. (2018). Novel performance-based technique for predicting maintenance strategy of bitumen stabilised ballast. Construction and Building Materials, 161, 1-8. doi:10.1016/j.conbuildmat.2017.11.115

Despite being the most used worldwide, railway ballasted tracks presents high maintenance cost related to ballast settlement and particle degradation. With the aim of reducing life cycle costs, bitumen stabilised ballast (BSB) has been recently propo... Read More about Novel performance-based technique for predicting maintenance strategy of bitumen stabilised ballast.

Microstructural characteristics, porosity and strength development in ceramic-laterized concrete (2017)
Journal Article
Awoyera, P., Akinmusuru, J., Dawson, A., Ndambuki, J., & Thom, N. (2018). Microstructural characteristics, porosity and strength development in ceramic-laterized concrete. Cement and Concrete Composites, 86, https://doi.org/10.1016/j.cemconcomp.2017.11.017

Interfacial bonding between constituent materials and pore sizes in a concrete matrix are major contributors to enhancing the strength of concrete. In a bid to examine how this phenomenon affects a laterized concrete, this study explored the relation... Read More about Microstructural characteristics, porosity and strength development in ceramic-laterized concrete.

Evaluation of mixing temperature impact on warm mix asphalt performance (2017)
Conference Proceeding
Grenfell, J., Thom, N., & Abed, A. (2017). Evaluation of mixing temperature impact on warm mix asphalt performance. In Bearing Capacity of Roads, Railways and Airfields: Proceedings of the 10th International Conference on the Bearing Capacity of Roads, Railways and Airfields (BCRRA 2017), June 28-30, 2017, Athens, Greece (251-258). https://doi.org/10.1201/9781315100333-33

This study presents a new approach for determining an optimum mixing temperature for a chemical and an organic WMA additive based on correlating the mixing temperatures with performance measures including the Indirect Tensile Stiffness Modulus (ITSM)... Read More about Evaluation of mixing temperature impact on warm mix asphalt performance.

Suitability of mortars produced using laterite and ceramic wastes: mechanical and microscale analysis (2017)
Journal Article
Awoyera, P., Dawson, A., Thom, N., & Akinmusuru, J. (2017). Suitability of mortars produced using laterite and ceramic wastes: mechanical and microscale analysis. Construction and Building Materials, 148, https://doi.org/10.1016/j.conbuildmat.2017.05.031

Using industrial wastes and local materials as artificial aggregates in cement based materials remains a relevant measure for conservation of natural sources. In this study, novel cementitious mixes containing pulverized ceramic blended cement, ceram... Read More about Suitability of mortars produced using laterite and ceramic wastes: mechanical and microscale analysis.

Structural design of pavements incorporating foamed bitumen mixtures (2017)
Journal Article
Kuna, K., Airey, G., & Thom, N. (in press). Structural design of pavements incorporating foamed bitumen mixtures. Proceedings of the ICE - Construction Materials, https://doi.org/10.1680/jcoma.16.00039

This paper presents a rational structural design methodology termed the ‘cumulative damage approach’ for road, port and airport pavements incorporating cold bituminous mixtures with foamed bitumen. This has been developed along with a laboratory test... Read More about Structural design of pavements incorporating foamed bitumen mixtures.

A novel multi-scale numerical model for prediction of texture-related impacts on fuel consumption (2017)
Journal Article
Mansura, D., Thom, N., & Beckedahl, H. (2017). A novel multi-scale numerical model for prediction of texture-related impacts on fuel consumption. Tire Science and Technology, 45(1), https://doi.org/10.2346/tire.17.450104

It is estimated that to overcome rolling resistance (RR) a typical vehicle, on average, consumes 4152 MJ/119 L of fuel annually, depending not only on vehicle-related factors but also on pavement-related factors. A slight improvement in surface prope... Read More about A novel multi-scale numerical model for prediction of texture-related impacts on fuel consumption.

Failure mechanism of foamed concrete made with/without additives and lightweight aggregate (2016)
Journal Article
Hilal, A. A., Thom, N., & Dawson, A. (2016). Failure mechanism of foamed concrete made with/without additives and lightweight aggregate. Journal of Advanced Concrete Technology, 14(9), https://doi.org/10.3151/jact.14.511

It has been reported that owing to a densification of the internal structure of concrete, adding mineral admixtures leads to a more brittle behaviour. Therefore, with the intention of modifying (increasing the strength of) foamed concrete to make it... Read More about Failure mechanism of foamed concrete made with/without additives and lightweight aggregate.

Bitumen stabilized ballast: a potential solution for railway track-bed (2016)
Journal Article
D'Angelo, G., Thom, N., & Lo Presti, D. (2016). Bitumen stabilized ballast: a potential solution for railway track-bed. Construction and Building Materials, 124, 118-126. https://doi.org/10.1016/j.conbuildmat.2016.07.067

Railway ballast degradation under dynamic loads progressively leads to loss of mechanical performance and geometry of the track, so that maintenance interventions are frequently needed. In order to systematically avoid this issue, recently solutions... Read More about Bitumen stabilized ballast: a potential solution for railway track-bed.

Development of a tool to assess in-situ curing of Foamed Bitumen Mixtures (2016)
Journal Article
Kuna, K., Airey, G., & Thom, N. (2016). Development of a tool to assess in-situ curing of Foamed Bitumen Mixtures. Construction and Building Materials, 124, https://doi.org/10.1016/j.conbuildmat.2016.07.086

This paper discusses the simplest yet crucial mix design consideration of Foamed Bitumen Mixtures (FBMs); curing. The objective of the present study is to attain better understanding of the curing mechanism of FBMs and lessen the gap between laborato... Read More about Development of a tool to assess in-situ curing of Foamed Bitumen Mixtures.

Examining the effects of contributory factors on curing process of cold bitumen emulsion mixtures (2016)
Conference Proceeding
Nassar, A. I., Thom, N., & Parry, T. (2016). Examining the effects of contributory factors on curing process of cold bitumen emulsion mixtures. In Functional pavement design: proceedings of the 4th Chinese-European Workshop on Functional Pavement Design (4th CEW 2016, Delft, The Netherlands, 29 June - 1 July 2016)

Curing of Cold Bitumen Emulsion Mixtures (CBEMs) is influenced by different factors such as curing temperature, curing time, humidity and presence of cement. In this study, the influence of these contributory factors on CBEMs has been evaluated in te... Read More about Examining the effects of contributory factors on curing process of cold bitumen emulsion mixtures.

Characterisation of high-performance cold bitumen emulsion mixtures for surface courses (2016)
Journal Article
Nassar, A. I., Mohammed, M. K., Thom, N., & Parry, T. (in press). Characterisation of high-performance cold bitumen emulsion mixtures for surface courses. International Journal of Pavement Engineering, https://doi.org/10.1080/10298436.2016.1176165

Cold bitumen emulsion mixture (CBEM) is not yet widely used as a surface course around the world. In this study, 0/14-mm-size dense-graded surface course CBEMs have been investigated. The mechanical performance was evaluated in terms of stiffness mod... Read More about Characterisation of high-performance cold bitumen emulsion mixtures for surface courses.

Mechanical, durability and microstructure properties of cold asphalt emulsion mixtures with different types of filler (2016)
Journal Article
Nassar, A. I., Mohammed, M. K., Thom, N., & Parry, T. (2016). Mechanical, durability and microstructure properties of cold asphalt emulsion mixtures with different types of filler. Construction and Building Materials, 114, https://doi.org/10.1016/j.conbuildmat.2016.03.112

The primary aim of this study is to investigate the enhancement of Cold Asphalt Emulsion Mixtures (CAEMs) using binary and ternary blended fillers (BBF and TBF), including an in-depth assessment of the microstructure. Ordinary Portland cement (OPC),... Read More about Mechanical, durability and microstructure properties of cold asphalt emulsion mixtures with different types of filler.

Mix design considerations of foamed bitumen mixtures with reclaimed asphalt pavement material (2016)
Journal Article
Kuna, K., Airey, G., & Thom, N. (in press). Mix design considerations of foamed bitumen mixtures with reclaimed asphalt pavement material. International Journal of Pavement Engineering, https://doi.org/10.1080/10298436.2015.1126271

In the present work, a mix design parametric study was carried out with the aim of proposing a practical and consistent mix design procedure for foamed bitumen mixtures (FBMs). The mix design parameters that were adopted in the study are mixing and c... Read More about Mix design considerations of foamed bitumen mixtures with reclaimed asphalt pavement material.

Optimizing the mix design of cold bitumen emulsion mixtures using response surface methodology (2015)
Journal Article
Nassar, A. I., Thom, N., & Parry, T. (2016). Optimizing the mix design of cold bitumen emulsion mixtures using response surface methodology. Construction and Building Materials, 104, https://doi.org/10.1016/j.conbuildmat.2015.12.073

Cold mix asphalt (CMA) has been increasingly recognized as an important alternative worldwide. One of the common types of CMA is cold bitumen emulsion mixture (CBEM). In the present study, the optimization of CBEM has been investigated, to determine... Read More about Optimizing the mix design of cold bitumen emulsion mixtures using response surface methodology.

Effect of aggregate gradation on the stiffness of asphalt mixtures (2015)
Journal Article
Al-Mosawe, H., Thom, N., Airey, G., & Ai-Bayati, A. (2015). Effect of aggregate gradation on the stiffness of asphalt mixtures. International Journal of Pavement Engineering and Asphalt Technology, 16(2), https://doi.org/10.1515/ijpeat-2015-0008

Aggregate gradation plays an important role in the behaviour of asphalt mixtures. Packing of aggregate is a very important factor that will be affected by changing the aggregate gradation. Many researchers have investigated different ways of describi... Read More about Effect of aggregate gradation on the stiffness of asphalt mixtures.

The use of additives to enhance properties of pre-formed foamed concrete (2015)
Journal Article
Hilal, A. A., Thom, N., & Dawson, A. (2015). The use of additives to enhance properties of pre-formed foamed concrete. International Journal of Engineering and Technology, 7(4), https://doi.org/10.7763/IJET.2015.V7.806

This paper describes an experimental study of an enhancement of pre-formed foamed concrete, 1300-1900 kg/m3, by utilising two types of additives, silica fume and fly ash, to partially replace Portland cement and fine sand. It focuses on consistency,... Read More about The use of additives to enhance properties of pre-formed foamed concrete.

Improvement of the service life of sustainable self-compacting concrete SCC by integrating high dosage of cement replacement (2015)
Journal Article
Mohammed, K. M., Dawson, A., & Thom, N. (2015). Improvement of the service life of sustainable self-compacting concrete SCC by integrating high dosage of cement replacement

Based on simple diffusion theory and a timedependent factor (?) for the chloride diffusion coefficient, chloride penetration through concrete was numerically modelled and the service life was predicted. This was done for two reference mixes (normal v... Read More about Improvement of the service life of sustainable self-compacting concrete SCC by integrating high dosage of cement replacement.

On void structure and strength of foamed concrete made without/with additives (2015)
Journal Article
Hilal, A. A., Thom, N., & Dawson, A. (2015). On void structure and strength of foamed concrete made without/with additives. Construction and Building Materials, 85, https://doi.org/10.1016/j.conbuildmat.2015.03.093

A study has been undertaken to investigate the effect of different additives on the strength foamed concrete by characterising air-void size and shape parameters and identifying the influence of these parameters and changes to cement paste microstruc... Read More about On void structure and strength of foamed concrete made without/with additives.

Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste (2015)
Journal Article
Gómez-Meijide, B., Pérez, I., Airey, G., & Thom, N. (2015). Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste. Construction and Building Materials, 77, 168-178. https://doi.org/10.1016/j.conbuildmat.2014.12.045

The stiffness of cold asphalt mixtures (CAM) with 100% recycled construction and demolition waste aggregates (CDWA) was studied from three different points of view: the indirect tensile stiffness modulus (ITSM), the dynamic modulus at different tempe... Read More about Stiffness of cold asphalt mixtures with recycled aggregates from construction and demolition waste.

Pore structure and permeation characteristics of foamed concrete (2014)
Journal Article
Hilal, A. A., Thom, N., & Dawson, A. (2014). Pore structure and permeation characteristics of foamed concrete. Journal of Advanced Concrete Technology, 12(12), https://doi.org/10.3151/jact.12.535

A study has been undertaken to investigate the pore structure characteristics, porosity and critical pore diameter of preformed foamed concrete with a density between 1300 and 1900 kg/m3, and its effect on the permeation characteristics, water absorp... Read More about Pore structure and permeation characteristics of foamed concrete.

On entrained pore size distribution of foamed concrete (2014)
Journal Article
Hilal, A. A., Thom, N., & Dawson, A. (2015). On entrained pore size distribution of foamed concrete. Construction and Building Materials, 75, https://doi.org/10.1016/j.conbuildmat.2014.09.117

The pore structure of foamed concrete is a significant characteristic since it affects properties such as strength and durability. To investigate these properties, the determination of total air voids content is not sufficient as the shape, size and... Read More about On entrained pore size distribution of foamed concrete.

A study into the use of crumb rubber in railway ballast (2014)
Journal Article
Sol-Sánchez, M., Thom, N., Moreno-Navarro, F., Rubio-Gámeza, M., & Airey, G. (2015). A study into the use of crumb rubber in railway ballast. Construction and Building Materials, 75, 19-24. https://doi.org/10.1016/j.conbuildmat.2014.10.045

Ballasted track is the most common form of construction used in railway transportation due to a number of benefits in comparison with other solutions such as slab track. However, the degradation of the ballast particles and the layer settlement lead... Read More about A study into the use of crumb rubber in railway ballast.

Macro/micro-pore structure characteristics and the chloride penetration of self-compacting concrete incorporating different types of filler and mineral admixture (2014)
Journal Article
Mohammed, M. K., Dawson, A., & Thom, N. (2014). Macro/micro-pore structure characteristics and the chloride penetration of self-compacting concrete incorporating different types of filler and mineral admixture. Construction and Building Materials, 72, https://doi.org/10.1016/j.conbuildmat.2014.08.070

The relationship between the internal pore structure features at different scales and the local micro-characteristics of the interfacial transition zone (ITZ) to the non-steady state chloride migration coefficient (Dnssm) is investigated for one norm... Read More about Macro/micro-pore structure characteristics and the chloride penetration of self-compacting concrete incorporating different types of filler and mineral admixture.

Investigating geogrid-reinforced ballast: Experimental pull-out tests and discrete element modelling (2014)
Journal Article
Chen, C., McDowell, G., & Thom, N. (2014). Investigating geogrid-reinforced ballast: Experimental pull-out tests and discrete element modelling. Soils and Foundations, 54(1), 1-11. doi:10.1016/j.sandf.2013.12.001

This paper presents an evaluation of the interlocking behaviour of geogrid-reinforced railway ballast. Experimental large box pull-out tests were conducted to examine the interaction between ballast and a biaxial geogrid. The discrete element method... Read More about Investigating geogrid-reinforced ballast: Experimental pull-out tests and discrete element modelling.

Carbonation of filler typed self-compacting concrete and its impact on the microstructure by utilization of 100% CO2 accelerating techniques (2013)
Journal Article
Mohammed, M. K., Dawson, A., & Thom, N. (2014). Carbonation of filler typed self-compacting concrete and its impact on the microstructure by utilization of 100% CO2 accelerating techniques. Construction and Building Materials, 50, https://doi.org/10.1016/j.conbuildmat.2013.09.052

Via the use of accelerated carbonation techniques with 100% CO2 concentration, an experimental programme was performed to investigate the carbonation and associated microstructural changes of three different self-compacting concrete (SCC) in which so... Read More about Carbonation of filler typed self-compacting concrete and its impact on the microstructure by utilization of 100% CO2 accelerating techniques.