A Study of Lightweight Geopolymers Made from Rice-Husk

• Main Authors: CHEN, CHING-LIN, 陳清林
• Other Authors: 王金鐘
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/hau83v

碩士 === 正修科技大學 === 營建工程研究所 === 105 === In this study used of alkali activation technology to enhance activity of slag powder, excited slag powder cementation capacity, first slag powder geopolymer production, it was used as cementing material for rice husk brick, secondly used rice husk slag as filler, slag powder geopolymer used as cemented material, mixed rice husk slag with slag powder geopolymer made rice husk geopolymer brick. Slag powder geopolymer trial mix ratios(1)alkali equivalent(AE) was set to 6%, 8% and 10% ,(2)alkali modulus ratio (MS) was set to1.0,1.5 and 2.0,(3) liquid binder ratio, such as the deployment of 1.67,1.25and 1, mixing production 5cm * 5cm * 5cm test samples,(4) to curing3 days, 7 days and 28 days after executed the compression test, taked the best ratio used as cementation material of rice husk geopolymer brick. Secondly rice husk geopolymer brick trial mix ratios(1)alkali equivalent(AE) were set to 6%, 8% and 10% ,(2)alkali modulus ratio (MS) were set to1.0,1.5 and 2.0,(3) liquid binder ratio(L/B), such as the deployment of 1.67,1.25and 1,(4) binder aggregate ratio(B/A) was set to3,4 and 5, and poured set to 5cm*5cm*5cm test specimens, and then moved to 60 ℃oven for 48 hours after, then form removal, to curing 3 days, 7 days and 28 days after executed a series of tests, base mechanics features of the brick through tests of setting time compressive strength, water absorption and thermal conductivity, target for the production could meet the CNS 382 common brick specifications requirements. From the experimental results show (1)setting time of slag powder geopolymer cementitious material decrases with equivalent alkali increase, it decreases with liquid binder ratio shorten. (2)compressive strength of slag powder geopolymer cementitious material increases with equivalent alkali increase, it decreases with liquid binder ratio increase. (3)compressive strength of rice husk geopolymer brick increases with equivalent alkali and binder aggregate ratio increase;(4) water absorption of rice husk geopolymer brick decreases with equivalent alkali and binder aggregate ratio increase, increases with liquid binder ratio increase; (5)thermal conductivity of rice husk geopolymer brick in all ratios are between 0.466 and 0.762W / m × k,(6) The best ratio of rice husk geopolymer brick were alkali equivalent(AE) were 6%, 8% and 10%, alkali modulus ratio (MS) was 2.0, liquid binder ratio was1.0, binder aggregate ratio was 5, it can meet the compressive strength and water absorption requirement of CNS-382 common brick.