A COMPARATIVE STUDY OF THE USE OF VARIOUS TYPES OF CEMENT AS A FILLER ON THE STABILITY CHARACTERISTICS OF MARSHALL ASPHALT CONCRETE – WEARING COURSE (AC-WC) MIXTURES

In road construction, pavement stability is a crucial aspect in ensuring the durability and performance of the road against traffic loads. To improve the quality of the pavement, filler materials are substituted. Portland cement (PC) is used in the asphalt concrete mixture. The objective of this research was to analyze the effect of different types of Portland cement used as filler on the Marshall stability and other parameters of the Asphalt Concrete–Wearing Course (AC-WC) mixture. This research used a laboratory experiment method conducted at the Soil Mechanics, Materials, and Soil Measurement Laboratory, Faculty of Engineering, Universitas 17 Agustus 1945 Samarinda. This research used Holcim, Tonasa, and Conch cement types with a proportion of 2% of the total aggregate weight as an additive, and asphalt content varied between 5%, 5.5%, 6%, and 6.5%. Tests were carried out using the Marshall method to measure stability, flow, VIM, VMA, VFA, and Marshall Quotient parameters. The research results show that the addition of Portland cement as a filler in an Asphalt Concrete–Wearing Course (AC-WC) mixture significantly improves the mechanical strength and durability of the pavement, as demonstrated by higher Marshall stability values. Tonasa cement produced the highest Marshall stability and stiffness, indicating that its finer particle size and more homogeneous composition provide a stronger bond between the asphalt and aggregate.