论文总字数：19454字

摘 要

与传统的硅酸盐水泥相比，钡水泥特点是具有抗辐射性能，能适应现代建筑对高性能胶凝材料的要求。硅酸三钡作为钡水泥熟料中最主要的成分，其性能很大程度上影响整体的性能，故其制备工艺和水化性能的确定是研究钡水泥的性能特点的最重要的两个方面。不同的煅烧温度和保温时间决定了产物中硅酸三钡的含量、晶型；水化性能通常反映着水泥浆体的凝结和早期强度。

钡水泥在矿物组成上是以氧化钡代替硅酸盐水泥中的氧化钙，形成以硅酸三钡（B₃S）为主要组成的水硬性胶凝材料。本研究以二氧化硅和碳酸钡为原料，通过高温固相合成法分别在1350℃、1400℃、1450℃、1500℃下煅烧生成硅酸三钡，然后通过X射线衍射（X-Ray Diffraction）实验分析谱图，以此鉴定合成产物及其晶型。B₃S的水化性能由等温量热法测定，然后绘制出水化放热速率—时间曲线。实验数据表明：用高温固相法合成B₃S的最佳煅烧温度是1450℃及以上,且需多次粉磨和煅烧；与硅酸三钙相比较，B₃S水化热大，水化放热速率大，故具有更高的水化活性。

关键词：硅酸三钡 高温固相合成法 等温量热法 水化性能

Research for preparation and hydration properties of barium silicate

ABSTRACT

Compared with the traditional silicate cement, Barium cement is characterized by its anti-radiation properties, and can adapt to the requirements for high performance cementitious materials of the modern construction. As the main component of barium cement clinker, Barium silicate’s performance has a great effect on the overall performance, so confirm the preparation method and hydration properties are the most important aspects on the research of the performance characteristics of barium cement. The percent and polymorph of barium silicate was determined by different calcination temperature and holding time; and the hydration property of barium silicate was usually reflect the coagulation and early strength of the cement paste.

Barium cement is a hydraulic cementitious material which use Barium oxide substitute for calcium oxide in silicate cement, and the main component in mineral composition is barium silicate (B₃S). This study use silicon dioxide and calcium carbonate as raw materials to synthesis B₃S by solid-state reaction method respectively in 1400℃、1450℃、1500℃，and then identify synthetic product and its’ polymorph via X-ray diffraction. The Hydration Performance of B₃S were determined by isothermal calorimetry, then ploted the curve of heat evolution rate—time. The experimental results show that the optimum calcination temperature to synthesis B₃S by solid-state reaction method reach 1450℃, and it needs to grind and calcine repeatedly. Compared with the calcium silicate, B₃S has bigger hydration heat and hydration heat evolution rate, so it has higher hydration activity.

Key words: Barium silicate；High temperature solid-state synthesis method; Isothermal calorimetry；Hydration properties

目录

摘要 I

ABSTRACT II

第一章 文献综述 1

1.1 研究背景 1

1.2 B₃S的制备方法 2

1.3 B₃S的水化 3

1.3.1 C₃S的水化概述 3

1.3.2 水化早期颗粒特征 6

1.3.3 水化的研究方法 7

1.3.4 影响水化热的因素 8

1.4 实验目的 9

第二章 实验部分 11

2.1 原材料 11

2.2 配料方案及生料制备 11

2.2.1 配料方案 11

2.2.2 生料制备 11

2.3 煅烧制度 12

2.4 物相分析与水化性能测定 12

2.4.1 XRD物相（定性）分析 12

2.4.2 B₃S水化性能测定 13

第三章 实验结果与分析 14

3.1 B₃S的制备结果与分析 14

3.1.1 实验现象 14

3.1.2 XRD分析结果与讨论 14

3.2 水化结果与分析 18

第四章 结论与展望 20

4.1 结论 20

4.2 展望 20

参考文献 21

致谢 23

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