PHYSICAL AND CHEMICAL CHARACTERISTICS OF FLY ASH FROM TANJUNG ENIM AND BENGKAYANG ELECTRIC STEAM POWER PLANT IN THE CONSTRUCTION OF HOUSES AND BUILDINGS

Abstract
Fly ash (FA) is the residue from coal combustion in electric steam power plant (PLTU). FA has melting point ± 1300° C and mass density between 2.0 - 2.5 g / cm3. FA consists of several minerals such as silicon oxide, aluminium oxide, iron oxide, calcium oxide, magnesium oxide, titanium oxide, and natrium oxide. The FA produced will continue to increase along with the increasing need for electrical energy that must be met. The physical and chemical characteristics of FA are important aspects that can affect both the potential for use and the disposal or storage methods used. The potential utilization of FA has been widely used in the geotechnical field, one of which is applied as a geopolymer material. Other utilization of FA, the largest is used in the cement industry and concrete construction 44.19%, road pavement and embankment construction 15.25%, lowland landfill and land filling 12.49%, mine filling 8.84%, brick, masonry, and tiles manufacturing 7.61%, agriculture 2.47%, and for other fields 9.14% (Loya&Rawani, 2014). This study aims to determine the characteristics of the physical and chemical properties of FA originating from PLTU TanjungEnim, South Sumatra and PLTU Bengkayang, West Kalimantan. Then adjusted to the existing standards / SNI, whether these characteristics are met / not, especially for the construction of houses and buildings. Keywords - Fly ash, Physical and chemical properties, Tanjung Enim, Bengkayang.