Research Repository

See what's under the surface


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). doi:10.1016/j.conbuildmat.2018.09.084. ISSN 0950-0618

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

Influence of fibres on rheological properties and toughness of bituminous binder (2018)
Journal Article
Mohammed, M., Parry, T., & Grenfell, J. R. (2018). Influence of fibres on rheological properties and toughness of bituminous binder. Construction and Building Materials, 163, doi:10.1016/j.conbuildmat.2017.12.146

Many studies have been made to examine different ways to modify bitumen and asphalt mixtures in response to increasing performance requirements. One of these is the use of additive materials and in this study, the potential of cellulose and glass fib... Read More

Relative pavement performance for dual and wide-based tyre assemblies using a finite element method (2017)
Journal Article
Casey, D., Airey, G., & Grenfell, J. (2017). Relative pavement performance for dual and wide-based tyre assemblies using a finite element method. Journal of Testing and Evaluation, 45(6), doi:10.1520/JTE20160589. ISSN 0090-3973

There is a need to assess the realistic tire contact pressure created by a tire in contact with a pavement. The contact pressure is a function of tire type, axle loading, and tire inflation pressure (TiP). The research carried out considered dual tir... Read More

Laboratory evaluation of Rediset modified bitumen based on rheology and adhesion properties (2017)
Journal Article
Zhang, J., Airey, G., Grenfell, J., & Yao, Z. (2017). Laboratory evaluation of Rediset modified bitumen based on rheology and adhesion properties. Construction and Building Materials, 152, doi:10.1016/j.conbuildmat.2017.07.037. ISSN 0950-0618

Warm mix asphalt (WMA) could significantly reduce the production temperature of asphalt mixtures. Lower production temperature meaning reduced fossil fuel consumption and greenhouse gas emission which in turn avoid environmental pollution in the road... Read More

Evaluation of the degradation of fine asphalt-aggregate mixtures containing high reclaimed asphalt pavement contents (2017)
Journal Article
Sánchez, D. B., Grenfell, J., Airey, G., & Caro, S. (in press). Evaluation of the degradation of fine asphalt-aggregate mixtures containing high reclaimed asphalt pavement contents. Road Materials and Pavement Design, 18(sup2), doi:10.1080/14680629.2017.1304250. ISSN 1468-0629

This paper evaluates the mechanical properties and performance of the fine aggregate matrix (FAM) existing within full reclaimed asphalt pavement (RAP) asphalt mixtures, in terms of their rheological and fatigue deterioration properties. The RAP mate... Read More

Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous binders (2016)
Journal Article
Airey, G. D., Grenfell, J., Apeagyei, A., Subhy, A., & Lo Presti, D. (in press). Time dependent viscoelastic rheological response of pure, modified and synthetic bituminous binders. Mechanics of Time-Dependent Materials, 20(3), 455-480. doi:10.1007/s11043-016-9295-y

Bitumen is a viscoelastic material that exhibits both elastic and viscous components of response and displays both a temperature and time dependent relationship between applied stresses and resultant strains. In addition, as bitumen is responsible fo... Read More

Development of a composite substrate peel test to assess moisture sensitivity of aggregate–bitumen bonds (2016)
Journal Article
Zhang, J., Airey, G. D., Grenfell, J., Apeagyei, A. K., & Barrett, M. (2016). Development of a composite substrate peel test to assess moisture sensitivity of aggregate–bitumen bonds. International Journal of Adhesion and Adhesives, 68, doi:10.1016/j.ijadhadh.2016.02.013. ISSN 0143-7496

This paper presents the development of a suitable procedure to prepare peel test specimens using coarse aggregates and compare the results with the established standard peel test. The newly developed composite substrate peel test (CSPT) was found to... Read More

Experimental evaluation of cohesive and adhesive bond strength and fracture energy of bitumen-aggregate systems (2015)
Journal Article
Zhang, J., Airey, G. D., & Grenfell, J. R. (2016). Experimental evaluation of cohesive and adhesive bond strength and fracture energy of bitumen-aggregate systems. Materials and Structures, 49(7), doi:10.1617/s11527-015-0674-7. ISSN 1359-5997

Degradation of asphalt pavements is an inevitable phenomenon due to the combined effects of high traffic loads and harsh environmental conditions. Deterioration can be in the form of cohesive failure of the bitumen and/or bitumen-filler mastic or by... Read More

Influence of aggregate mineralogical composition on water resistance of aggregate–bitumen adhesion (2015)
Journal Article
Zhang, J., Apeagyei, A. K., Airey, G. D., & Grenfell, J. R. (2015). Influence of aggregate mineralogical composition on water resistance of aggregate–bitumen adhesion. International Journal of Adhesion and Adhesives, 62, doi:10.1016/j.ijadhadh.2015.06.012. ISSN 0143-7496

The effects of aggregate mineralogical composition on moistures sensitivity of aggregate–bitumen bonds were investigated using four aggregate types (two limestone and two granite)and two bitumen grades (40/60 penand70/100pen). Moisture sensitivity... Read More

Influence of aggregate absorption and diffusion properties on moisture damage in asphalt mixtures (2015)
Journal Article
Apeagyei, A. K., Grenfell, J. R., & Airey, G. (in press). Influence of aggregate absorption and diffusion properties on moisture damage in asphalt mixtures. Road Materials and Pavement Design, 16(sup1), doi:10.1080/14680629.2015.1030827. ISSN 1468-0629

An experimental study was undertaken to characterise moisture sensitivity of asphalt mixtures by comparing certain physico-chemical properties of selected aggregates of different mineralogies to the moisture induced strength degradation of the aggreg... Read More

Moisture damage assessment using surface energy, bitumen stripping and the SATS moisture conditioning procedure (2015)
Journal Article
Grenfell, J., Apeagyei, A. K., & Airey, G. (in press). Moisture damage assessment using surface energy, bitumen stripping and the SATS moisture conditioning procedure. International Journal of Pavement Engineering, 16(5), doi:10.1080/10298436.2015.1007235. ISSN 1029-8436

Durability is one of the most important properties of an asphalt mixture. A key factor affecting the durability of asphalt pavements is moisture damage. Moisture damage generally results in the loss of strength of the mixture due to two main mechanis... Read More

Influence of waxes on adhesion properties of bituminous binders (2014)
Journal Article
Lamperti, R., Grenfell, J., Sangiorgi, C., Lantieri, C., & Airey, G. D. (2015). Influence of waxes on adhesion properties of bituminous binders. Construction and Building Materials, 76, doi:10.1016/j.conbuildmat.2014.11.058. ISSN 0950-0618

The benefits at the base of WMA technologies are well established in the literature. They include the reduction in the energy consumption during the production of mixtures, the reduction in the emissions to the atmosphere in the production plant and... Read More

Moisture-induced strength degradation of aggregate-asphalt mastic bonds (2014)
Journal Article
Apeagyei, A. K., Grenfell, J., & Airey, G. (in press). Moisture-induced strength degradation of aggregate-asphalt mastic bonds. Road Materials and Pavement Design, 15(S1), doi:10.1080/14680629.2014.927951. ISSN 1468-0629

A common manifestation of moisture-induced damage in asphalt mixtures is the loss of adhesion at the aggregate–asphalt mastic interface and/or cohesion within the bulk mastic. This paper investigates the effects of moisture on the aggregate–mastic in... Read More

Application of Fickian and non-Fickian diffusion models to study moisture diffusion in asphalt mastics (2014)
Journal Article
Apeagyei, A. K., Grenfell, J., & Airey, G. (2015). Application of Fickian and non-Fickian diffusion models to study moisture diffusion in asphalt mastics. Materials and Structures, 48(5), doi:10.1617/s11527-014-0246-2. ISSN 1359-5997

The objective of this study was to investigate certain aspects of asphalt mastic moisture diffusion characteristics in order to better understand the moisture damage phenomenon in asphalt mixtures. Moisture sorption experiments were conducted on four... Read More