矿渣粉掺量对风积沙混凝土自收缩的影响  

Effect of slag powder content on self-shrinkage of aeolian sand concrete

作　　者：徐俊杰 XU Junjie(School of Architecture and Civil Engineering,Xi an University of Science and Technology,Xi an 710054,China)

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710045

出　　处：《四川建材》2023年第3期12-14,共3页Sichuan Building Materials

摘　　要：为研究胶凝材料对风积沙混凝土早期自收缩性能的影响,采用固定粉煤灰用量,用矿渣粉等量取代水泥用量分析风积沙混凝土早期自收缩的变化规律,进行扫描电镜(SEM)分析其水化机理的研究。得到结论:矿渣粉的掺入明显延缓了风积沙混凝土早期自收缩突变时间,同时掺入适量的矿渣粉可以抑制风积沙混凝土的早期自收缩,其中A1组早期自收缩最小约为基准组A0的46.9%,相对于基准组A0,A1组早期混凝土中有清晰可见的粉煤灰和水泥颗粒未参与水化且其孔隙率适中。In this study, the effect of cementitious materials on the early self-shrinkage performance of Aeolian sand concrete, this paper uses the fixed amount of fly ash to study the strength and early self-shrinkage of Aeolian sand concrete by substituting the same amount of slag powder for cements. The hydration mechanism is analyzed by scanning electron microscopy(SEM). The results show that the incorporation of slag powder significantly delays the early self-shrinkage abrupt change time of Aeolian sand concrete, and the addition of proper amount of slag powder can inhibit the early self-shrinkage of Aeolian sand concrete. The early self-shrinkage of the A1 group is about 46.9%of the reference group A0. Compared with the reference group A0, the early visible concrete fly ash and cement particles in the A1 group are not involved in hydration and their porosity is moderate.

关 键 词：矿渣粉 风积沙 早期收缩 微观形貌 

分 类 号：TU528[建筑科学—建筑技术科学]