Document Type : Original Article
Authors
1
Science and Research Branch islamic azad university
2
Department of Highway and Transportation, Faculty of Engineering, Science and Research Branch,Islamic, Azad University, Tehran, Iran
3
Assistant Professor, Department of Civil and Transportation Engineering, University of Isfahan, Isfahan, Iran
10.22034/tri.2023.366918.3095
Abstract
One of the main parameters in determining the effectiveness and quality of the emulsion is the degree of adhesion and coating of aggregate as well as its setting time. In this research, by changing various parameters, including: the amount of residual bitumen, percentage of emulsion added to the materials, the amount of latex and its production in the laboratory plant , the amount of coating of aggregate and the setting time in contact with aggregates for two types of basic bitumen 70/60 and 100/85 have been investigated. Also, the effect of different parameters of the bitumen emulsion, such as the type of bitumen, percentage of residual bitumen, and the amount of emulsifier used in the production of emulsion, on qualitative tests such as sieve test, viscosity, stability, and settlement of the emulsion bitumen were investigated. In this research, an attempt has been made to investigate the effect of two different types of siliceous and lime aggregate and their effect on the properties of slurry mixture. The results showed that the use of more latex reduced the setting time by about 23%, but the bituminous coating of the materials increased by about 5%. Also, the use of emulsifier and more residual bitumen increased the setting time by 100% and improved the bituminous coating of aggregate by 76%. Also, inferring from the results of the tests, the use of silica materials in the adhesion test requires more time for hardening. Also, siliceous materials have less resistance than limestone materials. Also, the resistance of siliceous materials in the wear test in wet conditions is about 22% lower and in the wheel loading test about 25% lower than limestone materials. In the consistency test of slurry mixture, it was also determined that limestone materials have more slump and less fluidity around 30%.
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