二氧化碳养护对矿渣/电石渣砌块抗压强度影响研究  

Effects of CO_2 curing on compressive strength of block prepared with blast-furnace slag and carbide slag

作　　者：刘日鑫[1] 张锦洲[2] 刘文斌[1] 肖雪军[1] 

机构地区：[1]常州工程职业技术学院,江苏常州213164 [2]长江大学,湖北荆州434023

出　　处：《新型建筑材料》2016年第10期36-38,55,共4页New Building Materials

基　　金：常州市科技局项目(CE20165033);湖北省建设厅项目(鄂建文[2015]67号)

摘　　要：研究了不同养护方式对以矿渣和电石渣为胶凝材料,经压力成型所制备砌块性能的影响。结果显示,随着电石渣取代率的增加,砌块的抗压强度逐渐提高,在电石渣取代率为15%时,砌块的抗压强度最高。砌块经过二氧化碳养护60 min时的抗压强度比纯自然养护7 d的抗压强度提高22.9%,与28 d抗压强度相当。以电石渣取代率15%为例,研究了水胶比和养护时间对二氧化碳养护效果的影响。结果发现,二氧化碳养护效果与砌块的水胶比之间存在一定的关系,水胶比越大,砌块抗压强度越低;此外,二氧化碳与体系中的氧化钙和二氧化硅发生反应的速度很快,养护20 min时砌块的抗压强度几乎达到二氧化碳养护的最大值。This paper studied the effects curing methods on the properties of blocks prepared with the blast-furnace slag and carbide slag. The results show that the compressive strength increased with the increasing carbide slag contents and the strength is the highest at 15%. The compressive strength after 60min CO2 curing is 22.9% higher than that of 7-day nature curing and equal to that of 28-day nature curing. The paper investigated the impact of W/C and CO2 curing time on the curing effect. The relationship between the CO2 curing effective and W/C was observed. The higher W/C,the lower is the compressive strength. In addition,the rate of reaction between the CaO and CO2 is prompt and the compressive strength arrives the maximum value after 20 min.

关 键 词：电石渣 矿渣 二氧化碳养护 抗压强度 

分 类 号：TU522.36[建筑科学—建筑技术科学]