ThaiScience
ThaiScience
ENGINEERING JOURNAL CHIANG MAI UNIVERSITY
Volume 26, No. 01, Month APRIL, Year 2019, Pages 249 - 259
A compatibility evaluation of asphalt emulsionselected aggregate to develop performance of para slurry seal
Thanon Bualuang and Peerapong Jitsangiam
Abstract Download PDF
The road pavement surface dressing technique using Para slurry seal to improve such surface quality has gained popularity for Thailand road pavement for the last ten years. However, suitable aggregates to produce Para slurry seal material are very limited because of a compatibility problem between general aggregates and an asphalt emulsion binder. This paper aims to demonstrate an evaluation of the compatibility between aggregate and cationic asphalt emulsion CSS-1h(EMA) which is an asphalt emulsion binder of Para slurry seal. This could be an alternative method of aggregate selection for using in producing Para slurry seal. A series of pH tests in conjunction with Zeta-potential analyses were used to basically evaluate the potential use of aggregate in Para slurry seal mixing and design processes. The study aggregates of A, B, and C, which were not in the recommendation list for using in Para slurry seal, were sourced from active quarries in the northern region of Thailand as a study area. Based on the petrographic analyses, the aggregates of A and B were classified as Limestone, but C could be geologically grouped as Basalt. Results of pH tests in conjunction with Zeta-potential analyses on A, B, and C aggregates were that aggregates of A and B which had a high portion of CaO while mixing with CSS-1h(EMA) exhibit a neutral pH value, but aggregate C was prone to have a negative pH value of acid with a minus Zeta-potential value. When considering the performance of torsion (cohesion) and wearing resistance after mix design processes, Para slurry seal produced from aggregates of A and B could demonstrate much higher torsion and wearing resistance than those of Para slurry seal produced from aggregate C. Furthermore, torsion and wearing resistance of Para slurry seal produced from aggregate B complies with the specifications of Para slurry seal of Department of Highway, Thailand. It was be, therefore, concluded that the basic evaluation process of pH tests in conjunction with Zeta potential analyses could be simply used to examine the compatibility between general aggregates and CSS-1h (EMA). That was greatly beneficial to Para slurry seal construction in Thailand in the way that more aggregate sources could be more effectively and wider selected.
Keywords
NoneENGINEERING JOURNAL CHIANG MAI UNIVERSITY
Published by : Faculty of Engineering Chiang Mai University
Contributions welcome at : http://researchs.eng.cmu.ac.th/?name=journal
