大掺量矿渣石膏水泥基复合材料的水化特性

发布时间：2018-02-28 22:33

本文关键词： 大掺量矿渣抗压强度水化产物　出处：《硅酸盐通报》2017年07期 　论文类型：期刊论文

【摘要】：通过测试宏观抗压强度,同时采用XRD和TG-DTA技术对大掺量矿渣石膏水泥基复合材料的水化特性进行了研究,研究表明:大掺量矿渣石膏水泥基材料早期强度远低于纯水泥,但其强度发展较快,尤其是7~28 d阶段,28 d强度基本达到42.5 MPa水平,90 d龄期强度除SG-4试件均超过纯水泥水平。试件早期强度随着熟料含量的增加而增长,而后期强度并不遵循这一规律,水化后期主要是矿渣粉中活性Al_2O_3与活性SiO_2参与水化反应,提高了体系抗压强度。SG系列水化产物主要为C-S-H凝胶和AFt,而纯水泥试样有大量Ca(OH)_2而几乎无AFt存在。熟料含量对早期水化产物数量影响较大,而对水化产物种类及水化后期产物数量影响不大。
[Abstract]:The hydration characteristics of high content slag gypsum cement matrix composites were studied by testing the macroscopic compressive strength and adopting XRD and TG-DTA technology. The results showed that the early strength of the large amount slag gypsum cement base material was much lower than that of pure cement. However, the strength of the specimens developed rapidly, especially when the strength of the specimens reached 42.5 MPa level at 28 d stage and the strength of 90 d age specimens except SG-4 was higher than that of pure cement. The early strength of the specimens increased with the increase of clinker content, and the strength of the specimens increased with the increase of clinker content. But the later strength does not follow this rule. In the later stage of hydration, active Al_2O_3 and active SiO_2 in slag powder participate in hydration reaction. The hydration products of the series were mainly C-S-H gel and AFT, while pure cement samples had a large amount of Ca(OH)_2 but almost no AFt. The clinker content had a great influence on the quantity of early hydration products. However, it has little effect on the kinds of hydration products and the quantity of hydration products.
【作者单位】：江西科技学院南昌市材料研究与结构检测重点实验室;武汉大学水资源与水电工程科学国家重点实验室;
【基金】：国家自然科学基金(51668021) 江西科技学院校级自然科学青年基金项目(ZR15QN04)
【分类号】：TB332;TQ172.1

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