Dense Grade Surface Course Cold Asphalt Emulsion Mixture Properties Containing Cement and Wheat Straw Ash (WSA)

Department of civil engineering, Faculty of Engineering, University of Kufa, Al-Najaf, Iraq

^a* Corresponding author ammarabd545@gmail.com
^b abbas.alhadabi@uokufa.edu.iq

Abstract

Hot mix asphalt (HMA) can be replaced by cold bitumen emulsion mixtures (CBEMs), which are more environmentally friendly, less expensive, and use less energy. However, traditional CBEM has some drawbacks, primarily because it takes a while to reach its peak performance and is more susceptible to water damage. This paper talks about the test results of research that looked into and tried to make a new dense grade CBEM with a waste biomass material called wheat straw ash (WSA), made when the wheat straw is burned. The new (CBEM) was compared to a reference standard cold mix and to hot mix asphalt. The Marshall test and the indirect tensile strength test were used to measure the mechanical properties of the mixtures. The durability was tested by seeing how it reacted to water and how long it lasted. The outcomes demonstrated that CBEMs constructed using regular Portland cement (OPC) has superior mechanical characteristics, and then WSA could replace some OPC without compromising the gains. According to the results, the new CBEMs with WSA performed significantly better than the older CBEMs with OPC. The sensitivity to water also considerably improved when WSA was utilized. This study paves the way for creating novel, highly mechanically efficient CBEMs manufactured from biomass ash.