摘要
在水泥胶砂中掺入适当配比的煤矸石可以增加水泥砂浆的强度,尤其是早期强度。与不添加煤矸石的基准砂浆相比,煤矸石的掺量为9%时,砂浆3d抗压强度提高1.0MPa,28d抗压强度提高2.0MPa。XRD、TGA-DTA和SEM分析证实:加入煤矸石促进了水泥砂浆7d早期水化反应,生成水化产物钙矾石、C-S-H凝胶、AFm和氢氧化钙,且水化产物的数量亦不同,各产物的晶型结构也不相同,改性后水化产物增多,水化速率加快,因而影响砂浆的宏观力学强度。
The addition of suitable amount of coal gangue to cement mortar may increase cement mortar strength. When the content of coal gangue is 9%,the compressive strengths at 3 and 28 d increased 1.0 MPa and 2.0 MPa,respectively. The analysis by XRD,TGA-DTA and SEM showed that the addition of coal gangue prompted the hydration reaction at early stage of 7 days. The hydration products are AFt,C-S-H,AFm and Ca（OH）2. These hydration products and crystal structures are different. After modification,hydration products increased and the hydration speed was quickened. As a result,the cement mortar strength increased.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2010年第1期243-247,共5页
Bulletin of the Chinese Ceramic Society
基金
安徽省教育厅自然基金资助项目(KJ2008B274)
关键词
煤矸石
水泥砂浆
性能分析
微观结构
coal gangue
cement mortar
performance analysis
microstructure
