摘要
采用抗压强度试验、X射线衍射(XRD)试验、傅里叶红外光谱(FTIR)试验和电子扫描显微镜(SEM)试验研究了不同矿渣掺量的水泥石在5℃,5wt%MgSO4溶液环境下抗压强度、腐蚀产物组成及微观结构特性。结果表明:硫酸盐作为矿渣活性的激发剂,在腐蚀早期能够提高水泥石强度,体系中掺入矿渣能有效改善水泥石抗碳硫硅钙石型硫酸盐腐蚀(TSA)作用。未掺矿渣的普通硅酸盐水泥在5℃,5wt%MgSO4溶液环境中腐蚀产物为白色泥状碳硫硅钙石,其腐蚀类型为典型的碳硫硅钙石型硫酸盐腐蚀;当体系中掺入矿渣后,水泥石硫酸盐腐蚀类型逐渐由TSA型向石膏型转变。矿渣掺量为30%时,体系中既发现了TSA作用产物也发现了石膏型腐蚀产物,当矿渣掺量大于40%时,体系硫酸盐腐蚀类型以石膏型为主。
Compressive strength, X-ray diffraction(XRD), fourier transform infrared spectroscopy(FTIR) test and scanning electron microscopy(SEM) test were carried out to study the compressive strength, corrosion product composition and microstructure characteristics with different slag content in 5 ℃, 5 wt% MgSO4 solution. The results show that the sulfate can activated the slag activity and improve the strength of the cement in the early stage of corrosion. The corrosion product of ordinary portland cement in 5 ℃, 5 wt% MgSO4 solution is white mud-like thaumasite, and its sulfate corrosion type is TSA type. When the slag is incorporated into the system, the type of cement stone sulfate corrosion gradually changes from TSA type to gypsum type. When the slag content is 30%, the product of TSA and the gypsum-type corrosion product are found in the system. When the slag content is more than 40%, the type of sulfate corrosion of the system is mainly gypsum type.
作者
傅博
程臻赟
何妍亭
胡云香
韩静云
FU Bo;CHENG Zhenyun;HE Yanting;HU Yunxiang;HAN Jingyun(Collage of Civil Engineering,North Minzu University,Yinchuan 720021,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第2期471-476,共6页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51668001)
宁夏自然科学基金(NZ17263)
宁夏高等学校科学技术研究项目(NGY2016151)
北方民族大学2019年重点科研项目(2019KJ31)
北方民族大学2018年一般科研项目(2018XYZTM-02)。
