The Engineering Properties of Circulating Fluidized Bed Boiler Slag Used as Green Building Material

• Main Authors: CHANG,CHE-HSUAN, 張哲軒
• Other Authors: 趙鳴
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/66794136883747096345

碩士 === 正修科技大學 === 營建工程研究所 === 102 === This article used after processing Circulating Fluidized Bed Boiler Slag (CFB) though dried, ground into powder, mixed with cement, fly ash, slag, and other pozzolanic materials and water, the first aggregate production, they are translated into ball aggregate of different sizes through extrusion, injection molding, rubbing and granulation, then cured 28days used as coarse and fine aggregate of concrete. The second brick production, after processing CFB combined with iron oxide, sodium bicarbonate etc. after dry naturally compacts made of brick, then heating segmented sintered red brick, base mechanics features of the brick through tests of compressive strength, water absorption and density, and to explore physics and mechanics characteristics of sintered red brick. The research results show that： The first aggregate production (1)The compressive strength of aggregate increased with curing time increase, as C50-S30-CFB(1)20 ratio has the highest compressive strength, if consider both cost and compressive strength, but C30-S30-CFB(1)40 ratio is best. (2)The C50-S30-CFB(2)20 ratio had the highest compressive strength, and added slag powder than fly ash had a higher compressive strength. The second brick production (1) The compressive strength of brick increased with sintered temperature increase, but increased with CFB compound material decrease, used 20% CFB had the best result. (2) The compressive strength of brick increased with sintered temperature increase, the compressive strength of brick increased with flux dosage increase, used 2%flux had the best result. (3) The water absorption of brick increased with sintered temperature decrease, the water absorption of brick increased with both flux blowing agent dosage decrease, used 2%blowing agent had the best result. (4) There are TFT57-CFB20-M20-B1-Fe2 、TFT57-CFB20-M20-B2-Fe1 、TFT57-CFB20-M20-B1-NaH2 and TFT57-CFB20-M20-B2-NaH1 ratios have the best result, in the 950℃sintered temperature, they met the requirements of three kinds of bricks, on the compressive strength and water absorption.