Infrastructure development in Indonesia has increased. Therefore, the use of cement has increased as well. For this reason, it is necessary to replace the replacement cement material with environmentally friendly material. Fly ash is one of the waste materials that can be used as a substitute for cement. The purpose of this paper is to determine the compressive strength values of geopolymer mortars using fly ash-based from different Thermal Power Station and to determine the relationship of temperature curing with the compressive strength on geopolymer mortars using fly ash-based. The fly ash used was obtained from two Thermal Power Station in South Sulawesi, Indonesia. The sample is in the form of a cube with 5 cm × 5 cm size, with variations in room temperature; 65°C, 85°C, and 105°C. Activators used were Na2SiO3 and NaOH with 10 M with a ratio of Na2SiO3 per NaOH of 2. Compressive strength tests were carried out at 28 days. From the results of the study that the compressive strength of geopolymer mortar based on fly ash-Thermal Power Station A is higher than the compressive strength value of geopolymer mortar based on fly ash - Thermal Power Station B. The relationship of compressive strength with curing treatment with geopolymer mortar temperature variations is very significant. The higher the temperature, the higher the compressive strength of the mortar.

Granular Asbuton is a natural material that occurred millions of years ago. Asbuton is a huge natural asphalt reserve. The bitumen content of Asbuton is located in an inter-mineral cavity that is difficult to remove. If the layer is dug and then obtained Asbuton chunks, the Asbuton remains a unit between the bitumen and the mineral granules, even if it is crushed to a small size, the bitumen and minerals remain united. The proportion of bitumen and minerals in granular Asbuton has basic properties, such as grain size distribution, ability to drain water, compression properties when compressed, shear strength, carrying capacity, and innovation in reducing soil deformation and decline. This study aims to examine the characteristics of physical and mechanical properties, determine the amount of bearing capacity and, evaluate the deformation pattern of asphalt granular column foundation systems. Testing uses SNI and ASTM standards. Based on the results of testing the characteristics of Granular Asbuton obtained the value of qu max = 0.131 kg / cm3, in the conditions of the optimum water content of Proctor. The value of California Bearing Ratio (CBR-Unsoaked) was 1.79%. So from the results obtained, that the use of Granular Asbuton greatly affects the stability of the soil that will be used as the construction material because of this material functions as a binding material from other materials and can be given other activating materials that can increase the bearing capacity.