Effect of the Portland Composite Cement Addition on the Marshall Characteristics of the Cold Paving Hot Mix Asbuton

Cold Paving Hot Mix Asbuton (CPHMA) is used not only for routine maintenance work on road pavements with a relatively small volume of work but has expanded its use on national roads, often used by heavy vehicles and heavy traffic.This condition requires efforts to increase the durability of CPHMA by increasing the marshall stability value by adding filler material.This study aims to analyze the characteristics of marshall CPHMA after adding 1%, 2%, and 3% composite portland cement (PCC), compared with standard CPHMA products without fillers.The Marshall characteristics of 4 types of CPHMA were tested using 16 sample brickets with 2×75 impacts in 2 stages, which were differentiated according to the soaking time, namely 30 minutes and 24 hours.The test results show that the marshall stability values of CPHMA with 1%, 2%, and 3% PCC levels are 880.5 kg, 1,036.4kg, and 1,096.6 kg respectively, an increase compared to the marshall stability of 704.6 kg for standard CPHMA (0% filler).The 25 kg sack packaging CPHMA tested had an average asphalt content of 6.6% and used aggregates according to the specifications determined by Bina Marga.The research results showed that the addition of PCC up to 2.67% caused the flow characteristics not to exceed the minimum limit of 3 mm and fulfilled the 6 CPHMA marshall characteristics as a whole, namely VMA, VIM, VFB, flow, marshall stability and retained marshall stability after 24 hours of immersion.PCC in 50 kg sack packaging products can be used as an additional filler to obtain marshall characteristics that meet CPHMA specifications.The use of PCC at an optimum level of 1.33% is recommended for routine road maintenance work to increase CPHMA's resistance to vehicle traffic loads.