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It is known that cement has been used as a stabilizing agent for the road pavement stabilization. However, it could cause an adverse effect of premature cracking on the road. Moreover, asphalt emulsion has been a famous agent for pavement stabilizing as well, even though it has revealed low deformation resistance. Therefore, this research aims to investigate resulting from the mixture of cement and asphalt emulsion, which is called cement-asphalt emulsion as a new stabilizing agent. This mixture provides more flexibility and waterproofing by using asphalt emulsion features, and high strength from cement. Cement-asphalt emulsion mortar; the mixture of Portland cement type I, cationic asphalt emulsion (CSS-1), and standard sand, were used as the study material. Cement-asphalt emulsion mortar was a various type of cement and asphalt emulsion ratios for the compressive strength test and flexural strength test. The test results presented that the compressive strength and the flexural strength decrease with an increase of asphalt emulsion. Ratio 4:1 (cement: asphalt emulsion) exhibited the highest compressive strength and the flexural strength at 7 days and 28 days testing with controlled relative humidity curing. This ratio then should be recommended to apply in pavement stabilization.

As known, cement has been used as a stabilizing agent for the road pavement stabilization technique. However, it could cause an adverse effect of premature cracking on road, resulting from the inherent brittle manner of cement-stabilized materials. This research aims to investigate on a cement-asphalt emulsion mixture as a new stabilizing agent which would provide more flexibility of the road-stabilized material. Cement-asphalt emulsion mortar (CAE) (the mixture of Portland cement type I, asphalt emulsion type CSS-1, and standard sand) was used as the study material. The compressive strength and flexural strength of CAE mortar with varying cement and asphalt emulsion ratios at 7 days and 28 days testing with controlled relative humidity curing were performed. The test results showed that the flexural strength and the compressive strength decrease with an increase of asphalt emulsion (at fixed ratio CAE mortar). The strength at 7 days of curing is around 70% of that for 28 days of curing. The ratio 4:1 (cement: asphalt emulsion) exhibited the highest compressive strength and the flexural strength at 28 days. This result of this research is likely promising to obtain a new stabilizing agent which can create the flexibility property of a road-stabilized material.

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