选择性溶解法研究大掺量矿物掺合料的复合水泥浆体中硅.docVIP

安徽建筑工业学院本科生毕业论文 PAGE 42 2011年 6月 10日 选择性溶解法研究大掺量矿物掺合料的复合水泥浆体中硅灰的反应程度 PAGE \* MERGEFORMAT III 摘要 粉煤灰和硅灰现已成为高性能水泥中必不可少的性能调节型辅助性胶凝材料，确定水泥浆体中粉煤灰或硅灰的反应程度，对评价它们的反应活性及其对该体系结构形成的贡献、研究反应动力学等具有重要意义。 本文选取粉煤灰与硅灰，采用盐酸选择性溶解法测定粉煤灰和硅灰的反应程度，研究水泥浆体中粉煤灰或硅灰的反应程度与掺量的关系。 实验分别对煅烧—沥滤工艺中的煅烧活化过程、溶出过程进行探究。通过对粉煤灰的活化机理进行研究，选用Na2CO3为活化剂，选择H2SO4为溶出剂。对同一掺量比粉煤灰不溶物和水泥不溶物及各个龄期复掺不溶物中铝盐含量进行研究，实验采用络合滴定法，以乙二胺四乙酸（EDTA）为络合剂有效滴定铝离子。 关键词：粉煤灰，硅灰，反应程度，活化，络合剂 Abstract Fly ash and silica fume high-performance concrete has become an indispensable helper type performance tuning cementitious materials to determine the cement paste and silica fume in the reaction of fly ash or the extent of the evaluation of their reactivity and theircontribution to the formation of the architecture, kinetic study has important significance. This selection of fly ash and silica fume, the use of hydrochloric acid selective dissolution method for the determination of the reaction of fly ash and silica fume degree of cement paste and fly ash or silica fume in the reaction of the relationship between the degree and content. Experiments were calcined - leaching calcined in the activation process, the dissolution process of inquiry.Through the activation mechanism of fly ash study Na2CO3 used as an activator, select H2SO4 as dissolution agent.Compared to the same content and cement fly ash insoluble in all age insoluble and insoluble in the aluminum doped compound content of research and experiment by complexometric titration to ethylenediaminetetraacetic acid (EDTA) as complexing agent effective titrationaluminum ion. Key words: fly ash, silica fume, the degree of response, activation, complexing agent 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc264055682 第一章 前言 PAGEREF _Toc264055682 \h 1 HYPERLINK \l _Toc264055683 1.1研究现状及前景 PAGEREF _Toc264055683 \h 1 HYPERLINK \l _Toc264055684 1.2粉煤灰和硅灰对胶凝材料作用机理的研究现状 PAGEREF _Toc