Mechanical Properties of a Base Materials Improvements by Portland Cement Mixing with Asphalt Emulsion

Abstract

This paper presents the mechanical properties of a base materials, which improve by Portland cement mixing asphalt emulsion. The Department of Rural Roads had conducted the experiment to improve the base materials of road NM.3038 at the junction of road number 201 – Ban DonYai, Dan khun Thot District, Nakhon Ratchasima Province. The sample of base materials was divided into two groups. The first group of base materials was without cement improvement. For the second group, the base materials were modified with cement. The content of Portland cement was fixed at 4.75 % by weight of base materials and asphalt emulsion was varied at the rate of 0%, 1% and 2% by weight of base materials. The results revealed that the unconfined compressive strength (USC) of base material proportionally decreases with the amount of asphalt emulsion. However, the increases in asphalt emulsion content enhance the indirect tensile strength (ITS) and resilient modulus value (Mr). Therefore, it proved that the base materials improvement by Portland cement mixing asphalt emulsion in group 1 had better mechanical properties than group 2.