Effect of Fly Ash to Thermal Diffusion of Mortar

• Main Authors: Yi-Chang Lin, 林逸昌
• Other Authors: Cho-Liang Tsai
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/04032235435722319853

碩士 === 雲林科技大學 === 營建工程系碩士班 === 99 === This research studies the effect of fly ash on thermal diffusion of mortar. Experimental data reveals that mortar specimen with specific substitution rate of cement, standard sand or both by fly ash has lower thermal diffusion than that of normal mortar specimen. Four sets of thermal diffusion tests on mortar specimens with different cement-standard sand substitution rates, 0%-0%, 0%-30%, 10%-30% and 20%-30%, are tested. Specimens with cement-standard sand substitution rates of 20%-30% have lower thermal diffusion coefficient than others do. Flow table test, compression test and test for setting time are conducted to characterize the mortar with or without fly ash for their basic properties. The result from flow table test verifies that the more fly ash is used the more water is required. The result from compression test verifies that the compression strength of specimen with specific substitute rate has higher compression strength than that of those without fly ash. Setting time of specimen with specific substitute rate has shorter setting time that of those without fly ash. Thermal diffusion tests by infrared thermal sensor, thermometer and thermal couple are conducted on specimens exposed to sunlight to compare the difference between those with fly ash and without fly ash.