Indonesia is the second largest country to contribute plastic marine debris in the world. Onthe other hand, Indonesia is facing pavement problem due to various reasons, so it needs to improvethe pavement quality and performance. The addition of plastic waste to the hot mix asphalt (HMA)actually have beneficial effect to improve the pavement quality. Utilization of plastic waste in roadconstruction is conducted by incorporating the plastic waste into the asphalt mixture as an additivewith dry or wet mix process. The objective of this research is to investigate the laboratoryperformance of asphalt mixture using plastic waste addition and its effect on the moisture sensitivity,resistance to deformation and the fatigue life of the asphalt mixture. The addition of plastic waste inHMA will increase the Marshall stability and the resilient modulus of the mixture, improve strippingresistance, moisture sensitivity and also the rutting resistance. Up to a certain plastic content, theaddition of plastic waste will improve the fatigue life and the ravelling resistance of the HMA, on thecontrary excesive addition of the plstic waste will decrease the fatigue life and ravelling resistancecompare to the conventional HMA. The field application is very simillar to conventional HMA,except it requires additional time during dry mix process in the production plant.

Indonesia is boosting electricity supply, where coal fired power plants are most widely used. Burning coal activity will produce Fly Ash Bottom Ash (FABA) that categorized as Hazardous and Toxic Substances. The production of FABA are 6.598.493 tons (2019) and will increase along with the 35, 000MW program. The research purpose is to study the utilization of FABA from PLTU Labuan Angin as road pavement material that not only fulfill required specifications, but has better performance and environmentally safe. The experimental method was chosen by laboratory testing. Criteria for utilization of FABA as road pavement material, must be carried out with the use of material that capable to binding FABA so that it doesn’t disintegrate Test results showed that FA is type F with CaO levels <10% and LoI 4.27%. Characteristics testing also showed results such as specific gravity of FA 2.64 and BA 2.56, absorption 3.24%, sand equivalent 95.35%. Utilization for base layers with a composition of 75% BA, 25% FA, and 9% PCC produce γd 1.71%, Wopt 5.84%, and UCS 33.05kg/cm2. This utilization is the most effective, because it absorbs more volumes, binding cement, and compaction with heavy equipment can also prevent FABA from released so it is environmentally safe.

Tailing waste from gold mining in Papua, Indonesia, is a severe problem for the environment. Tailing as Hazardous and Toxic Substances, the deposits so massive. On the other hand, the availability of natural aggregates for road pavement continues to run low. The problems can be solved by utilizing tailing as a road base layer with massively, fulfill specification, and save. The purpose of this research is how to utilize tailing as a road base layer. The research methods used are experiment laboratory method by physical, chemical, TCLP, and mechanical strength test. The physical analysis shows that the size of the tailing is loose and non-cohesive, so it requires binding material to increase bearing capacity. The TCLP test showed that the level of toxic material in tailing was fulfilled the threshold. The stabilization analysis of tailing with 20% clay soil produces CBR 17,3% and can only be utilized as embankment. Stabilization with 13,35% cement fulfills the target UCS 24 kg/cm2 to be used as a road base layer. Marshall test result by 60% tailing and 7% asphalt meet specifications to be asphalt road base layer.