摘要
以水泥、矿渣粉、粉煤灰为三因素设计L9(34)正交试验,研究不同养护制度下大掺量矿渣加气混凝土水化产物的微观形貌与强度之间的关系。试验结果表明:标准养护条件下生成少量小片状的Ca(OH)2和零星团簇状双碱C-S-H凝胶,分布不均匀,填充性差,存在连通孔;蒸汽养护条件下生成少量针状的C-S-H凝胶和片状托勃莫来石,结构较为疏松;蒸压条件下生成的C-S-H与托勃莫来石层包裹于孔外壁,孔内有托勃莫来石层支撑,将孔形成"零密度"的"骨料",如中空的"刚性球",具有均分应力的作用,宏观表现为制品的强度较高。
Taking the cement,slag powder and fly ash as the three factors,the L9(34) orthogonal test is designed,which explores the relationship between the microstructure and strength mechanism of hydration products of aerated concrete with a large quantity of slag addition under different curing systems. The test results show that:A small amount of patchy Ca(OH)2 and sporadic cluster-like double alkali C-S-H gels were produced under standard curing condition,with uneven distribution,poor filling and connected pores. A small amount of spicelike C-S-H gel and flaky tobermorites were formed under steam curing condition,and the structure is relatively loose. C-S-H and tobermorites layer generated under autoclaved curing condition are spreading on the exterior wall of the pores,and inside the pores there exist tobermorites as some support,which makes the pores into "zero density" "aggregate",equal to the hollow "rigid ball",with the function of distributing stress evenly,and leading to the results that the strength of the product is high in terms of the macroscopic performance.
作者
宋起运
胡荻
白建飞
朱志伟
李英
晋强
SONG Qiyun;HU Di;BAI Jianfei;ZHU Zhiwei;LI Ying;JIN Qiang(College of Water Resources and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Urumqi Institute of Building Materials Research,Urumqi 830000,China;Xinjiang Bayi Iron and Steel Co.Ltd,Urumqi 830000,China;Xinjiang Uygur Autonomous Region Iron and Steel Industry Association,Urumqi 830000,China)
出处
《新型建筑材料》
北大核心
2020年第2期100-104,116,共6页
New Building Materials
基金
2018年度乌鲁木齐市新型墙体材料专项基金项目
新疆维吾自治区优秀青年科技人才培养项目(2017Q023).
关键词
矿渣
加气混凝土
微观形貌
强度机理
slag
aerated concrete
microstructure
strength mechanism
作者简介
宋起运,男,1992年生,硕士研究生,主要从事建筑材料研究;通讯作者:晋强,副教授,地址:乌鲁木齐市农大东路311号,Email:1159464339@qq.com。
