THE EFFECTS OF CEMENT AND CEMENT KILN DUST AS A FILLER ON THE MECHANICAL PROPERTIES OF COLD BITUMINOUS EMULSION MIXTURES

civil engineering

The application of cold mixes is lagging behind in the research field, which is quite obvious in a developing country. Furthermore, cold mixes have more economic and environmental advantages than hot mixes. This is the principal motivation for the present research, which aims to improve the mechanical properties of cold mix asphalt. Ordinary Portland cement (OPC) and cement kiln dust (CKD) were used as filler in cold bituminous emulsion mixtures (CBEMs) to compare the obtained results with those for CBEMs with conventional limestone. Indirect Tensile Stiffness Modulus (ITSM), fatigue, and resistance to rutting tests were used in the comparison. The experimental results showed that CBEMs with CKD and OPC had comparative mechanical properties to CBEMs with limestone and hot mix asphalt of the same grading and materials. Thus, this research introduces a new cold mix with CKD or OPC, which is able to meet more than the mechanical characteristics’ requirements, reduce costs, and provide environmental benefits.

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