TY - JOUR
T1 - Investigation of the bonding properties of bitumen using a novel modified binder bond strength test
AU - Zhou, Lu
AU - Airey, Gordon
AU - Zhang, Yuqing
AU - Wang, Chonghui
AU - Zhong, Haobai
PY - 2024/7/5
Y1 - 2024/7/5
N2 - The binder bond strength (BBS) test can directly quantify the bonding of bitumen-stone joints. However, the index “bond strength” used in this method cannot provide a clear distinction when evaluating the performance of various bitumen, and some results do not correspond to the field feedback related to the bonding performance. This study introduces a novel modified BBS test using the universal testing machine (UTM). The results of the standard BBS test and the BBS-UTM test on six unmodified bitumens and a styrene-butadiene-styrene modified bitumen (SBSMB) are compared, with the Cantabro loss test to validate the accuracy of the BBS-UTM test. The results show that the “bond energy” can be considered the critical indicator for characterising the bonding performance of different binders. The force-displacement curve in the BBS-UTM test is analysed and provides a mechanistic explanation for the mechanical response of bitumen during pull-off. The four-component test is conducted to link the bitumen composition characteristics to its bonding performance. It is found that bitumen adhesion is correlated to the content of asphaltenes. A higher saturates content shows more contribution of tenacity in the total bond energy, and an excessively high ratio of asphaltenes to resins may result in low bond energy.
AB - The binder bond strength (BBS) test can directly quantify the bonding of bitumen-stone joints. However, the index “bond strength” used in this method cannot provide a clear distinction when evaluating the performance of various bitumen, and some results do not correspond to the field feedback related to the bonding performance. This study introduces a novel modified BBS test using the universal testing machine (UTM). The results of the standard BBS test and the BBS-UTM test on six unmodified bitumens and a styrene-butadiene-styrene modified bitumen (SBSMB) are compared, with the Cantabro loss test to validate the accuracy of the BBS-UTM test. The results show that the “bond energy” can be considered the critical indicator for characterising the bonding performance of different binders. The force-displacement curve in the BBS-UTM test is analysed and provides a mechanistic explanation for the mechanical response of bitumen during pull-off. The four-component test is conducted to link the bitumen composition characteristics to its bonding performance. It is found that bitumen adhesion is correlated to the content of asphaltenes. A higher saturates content shows more contribution of tenacity in the total bond energy, and an excessively high ratio of asphaltenes to resins may result in low bond energy.
KW - Adhesion
KW - Binder bond strength tests
KW - Bonding properties
KW - Tenacity
UR - https://www.scopus.com/inward/record.url?scp=85194088699&partnerID=8YFLogxK
UR - https://www.sciencedirect.com/science/article/pii/S0950061824019263?via%3Dihub
U2 - 10.1016/j.conbuildmat.2024.136784
DO - 10.1016/j.conbuildmat.2024.136784
M3 - Article
AN - SCOPUS:85194088699
SN - 0950-0618
VL - 434
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 136784
ER -