煤矸石粉煤灰加气混凝土的制备及性能  

Preparation and Properties of Autoclaved Aerated Concrete UsingCoal Gangue and Fly Ash

作　　者：王长龙[1,2,3] 张凯帆 左伟 叶鹏飞 赵高飞 任真真 林庚 WANG Changlong;ZHANG Kaifan;ZUO Wei;YE Pengfei;ZHAO Gaofei;REN Zhenzhen;LIN Geng(School of Civil Engineering,Hebei University of Engineering,Handan 056038,China;Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,China;Tianjin Sunenergy Sega Environmental Science&Technology Co.Ltd,Tianjin 300380,China;Beijing Institute of Hydraulic and Environmental Geological Survey,China Coal Geology Group Co.,Ltd.,Beijing 100040,China;School of Chemistry and Chemical Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

机构地区：[1]河北工程大学土木工程学院,邯郸056038 [2]商洛学院,陕西省尾矿资源综合利用重点实验室,商洛726000 [3]天津舜能世嘉环保科技有限公司,天津300380 [4]中煤地质集团有限公司,北京水工环地质勘查院,北京100040 [5]西安科技大学化学与化工学院,西安710054

出　　处：《材料导报》2020年第24期24034-24039,共6页Materials Reports

基　　金：中国博士后科学基金(2016M602082);河北省自然科学基金(E2018402119,E2020402079);陕西省尾矿资源综合利用重点实验室开放基金(2017SKY-WK008);固废资源化利用与节能国家重点实验室开放基金(SWR-2017-006)。

摘　　要：以煤矸石和粉煤灰为主要原料制备加气混凝土,研究了煤矸石的最佳热活化温度以及煤矸石掺量对加气混凝土物理力学性能的影响,并采用X射线衍射(XRD)、场发射扫描电镜(SEM)分析加气混凝土制品的物相组成和微观形貌。结果表明,煤矸石的最佳煅烧温度为600℃,绝干密度为588 kg/m 3,抗压强度为3.65 MPa,达到了《蒸压加气混凝土砌块》(GB 11968-2006)规定的A3.5、B06级加气混凝土合格品的要求;经静停养护后的坯体中出现水化产物钙矾石(AFt)、托贝莫来石、C-S-H凝胶和水石榴子石;经蒸压养护后的制品中钙矾石分解,水化产物主要为结晶良好的托贝莫来石、C-S-H凝胶和水石榴子石。In this paper,a new type of autoclaved aerated concrete(AAC)was developed using coal gangue and fly ash.The calcination temperatures of the coal gangue,effect of coal gangue content on physical and mechanical properties of AAC,and phase composition and microscopic morphology of AAC were analyzed using X-ray diffraction(XRD),and scanning electron microscope(SEM).And the result shows that 600℃is the optimal calcination temperature,AAC with bulk density of 588 kg/m 3 and strength of 3.65 MPa,which can reach the requirements of A3.5,B06 level of AAC product regulated by“autoclaved aerated concrete block”GB 11968-2006.After static curing,the hydration products in AAC body were ettringite(AFt),tobermorite,C-S-H gels and hydrated garnet;during the autoclaving,AFt was decomposed and more tobermorite formed coupled with C-S-H gels and hydrated garnet.

关 键 词：煤矸石 粉煤灰 加气混凝土 托贝莫来石 水石榴子石 

分 类 号：TU528[建筑科学—建筑技术科学]