Investigating the Feasibility of Using Cement Kiln Dust in Cold Bituminous Emulsion Asphalt

Cold mix asphalt (CMA) has been increasingly predictable as an important asphalt mix technology alternative worldwide, where CMA has several advantages including economic, environmental and saving energy aspects over Hot-Mix Asphalt (HMA). Nevertheless, CMA has poor performance mainly about low early strength. This paper reports the experimental test results of a research project aimed to investigate and develop a new cold bituminous emulsion mixtures (CBEMs) containing Cement Kiln Dust (CKD); CKD is an industrial by-products from cement industry. The developed CBEM’s are compared with those results of conventional cold mix (CCM) as control, and performance cold mix containing ordinary Portland cement (OPC). However, the experiments were investigated the improvement in mechanical properties of CBEMs due to incorporating OPC, and detect the possibility of replacing the OPC with CKD. The mixtures mechanical properties testing were; Marshall test, indirect tensile strength and wheel track test. Durability in term of water sensitivity and ageing were examined too. The results have indicated that there is a feasibility to develop CBEM’s by supplementary replacement of OPC by CKD. Where up to 25% percentage of replacement can conserve the results of Marshall, indirect tensile strength, wheel track and durability achieved by 100% OPC as a filler in the CBEM. Therefore, this paper introduces new CBEMs having outstanding mechanical characteristics, cost effective, and environmental friendly.

Keywords:

By-product materials , Cement Kiln Dust , Cold bitumen emulsion mixtures , Hot Mix Asphalt , OPC