TY - GEN
T1 - Effect of moisture on the adhesion of aggregate–binder systems
AU - Nageswaran, P. D.C.
AU - Varveri, A.
AU - Scarpas, A.
AU - Mohan, S.
PY - 2019
Y1 - 2019
N2 - The introduction of new materials, polyurethane, epoxy, etc., either as a supplement or replacement to bitumen in pavement construction necessitates a better understanding of their adhesive properties with aggregates. This paper aims to study the changes in adhesion of aggregate-binder systems, before and after moisture conditioning. An easily implementable test procedure for the assessment of adhesive bond strength was developed. In total three aggregates (porphyry, diorite and sandstone) with four binders (Pen 70/100, SBS polymer modified bitumen, polyurethane-based binder and epoxy-based binder) and two adhesion promoters were tested. The direct tension test was found to be effective in quantifying adhesion. Overall, the test results demonstrated the detrimental effect of moisture on bond strength, especially when tested at low temperatures. The polyurethane-and epoxy-based binders were found to be highly moisture susceptible. Also, the effectiveness of the adhesion promoter was observed to depend on its compatibility with the binder.
AB - The introduction of new materials, polyurethane, epoxy, etc., either as a supplement or replacement to bitumen in pavement construction necessitates a better understanding of their adhesive properties with aggregates. This paper aims to study the changes in adhesion of aggregate-binder systems, before and after moisture conditioning. An easily implementable test procedure for the assessment of adhesive bond strength was developed. In total three aggregates (porphyry, diorite and sandstone) with four binders (Pen 70/100, SBS polymer modified bitumen, polyurethane-based binder and epoxy-based binder) and two adhesion promoters were tested. The direct tension test was found to be effective in quantifying adhesion. Overall, the test results demonstrated the detrimental effect of moisture on bond strength, especially when tested at low temperatures. The polyurethane-and epoxy-based binders were found to be highly moisture susceptible. Also, the effectiveness of the adhesion promoter was observed to depend on its compatibility with the binder.
UR - http://www.scopus.com/inward/record.url?scp=85091666014&partnerID=8YFLogxK
U2 - 10.1201/9781351063265-21
DO - 10.1201/9781351063265-21
M3 - Conference contribution
AN - SCOPUS:85091666014
SN - 9781138480285
T3 - Bituminous Mixtures and Pavements VII- Proceedings of the 7th International Conference on Bituminous Mixtures and Pavements, ICONFBMP 2019
SP - 137
EP - 143
BT - Bituminous Mixtures and Pavements VII- Proceedings of the 7th International Conference on Bituminous Mixtures and Pavements, ICONFBMP 2019
A2 - Nikolaides, A.F.
A2 - Manthos, E.
PB - CRC Press / Balkema - Taylor & Francis Group
T2 - 7th International Conference on Bituminous Mixtures and Pavements, ICONFBMP 2019
Y2 - 12 June 2019 through 14 June 2019
ER -