Performance Evaluation of Coal Ash Concrete as Building Materials in Mongolia

摘要

The Central Energy System in Mongolia consists of five power plants with a totalinstalled capacity of 796 megawatts(MW).Every year for a heating and producingelectricity,in the coal fired electric Power Plants in Mongolia,2.7 million tons of a coalhas used and have been producing approximately 531 thousand tons of coalcombustion by product per year.These burned coal and coal combustion by producta quantity are increasing year to year.The objective of this study was to determinethe possibilities of an effective usage of the coal combustion product of Power PlantIII in Ulaanbaator.The investigation is included the determination of a classification ofa coal ash which is producing in Mongolia,compared to other countries,the optimalmix proportion to produce aerated cellular concrete(ACC)which is a thermalinsulation lightweight concrete with a fly ash.According to laboratory experiments,acoal ash from Power Plant III has capability to produce an aggregate for pavement,filter,heavy and lightweight concrete.It also shown that the maximum content of flyash was 35-41%by volume at w/c=1.The values of density are between 1200-1800kg/m~3,compressive strength 2-12MPa,thermal conductivity 0.652-0.201W/m.K.Building wall thickness will be reduce by 3.7 times comparing to traditional a brickwall.