论文总字数：16149字

摘 要

在我国的可持续发展进程中，工业废渣的资源化利用对我国提倡的绿色环保经济有着极其重要的作用。固硫灰渣是流化床燃煤生成的工业废渣，但由于固硫灰渣品质差异较大认识不够以及脱硫技术问题，严重影响其资源化利用。本文研究固硫灰渣-钢渣复合胶凝材料的制备及性能，主要利用固硫灰渣及水泥作为体系的激发剂，促进钢渣、矿渣水化，生成具有一定强度、一定理化性质的胶凝材料。本实验的主要原料为钢渣和矿渣，加入固硫灰渣、水泥激发，多种掺量配比后进行净浆试块的成型实验。实验的创新点在于引进了固硫灰渣作为激发剂，既能降低其堆放带来的环境污染以及资源浪费，还能减少脱硫成本。将不同掺量的固硫灰渣、钢渣进行净浆试块成型后，放入标准养护箱后养护到期龄，测定试件的抗压强度。实验结果表明：随固硫灰渣取代矿渣，其体系的Al₂O₃减少使得早期硫激发作用大大减弱，试件的早期强度在逐渐降低；固硫灰渣取代少量钢渣，体系内含铝矿物增加，其早期强度在一定范围内有较小提升；固硫灰渣可作为激发剂促进钢渣、矿渣水化，与其含铝矿物反应生成钙矾石。

关键词:固硫灰渣 钢渣 抗压强度 XRD分析

Preparation and properties of sulfur-fixed ash-steel slag composite cementitious materials

Abstract

In the process of sustainable development in my country, the resource utilization of industrial waste residues plays an extremely important role in the green and environmentally friendly economy advocated by my country. Sulfur-fixed ash is industrial waste slag produced by fluidized bed coal combustion. However, due to the large difference in quality of sulfur-fixed ash and insufficient understanding and desulfurization technical problems, its resource utilization is seriously affected. This paper studies the preparation and mechanical properties of sulfur-fixed ash slag-steel slag composite cementitious materials. It mainly uses sulfur-fixed ash slag and cement as the activator of the system to promote the hydration of steel slag and slag to produce a cement with certain strength and certain physical and chemical properties material. In this experiment, sulfur-fixed ash slag, steel slag, and slag are used to excite cement, and after a variety of mixing ratios, a clean pulp test block is formed. The innovation of the experiment lies in the introduction of sulfur-fixing ash as an stimulant, which can not only reduce the environmental pollution and resource waste caused by its stacking, but also reduce the desulfurization cost. The sulfur-fixed ash slag and steel slag of different dosages are formed into a clean pulp test block, and then put into a standard curing box and cured to the age of maturity to determine the compressive strength of the test piece. The experimental results show that as the sulfur-fixed ash slag replaces the slag, the reduction of Al2O3 in the system greatly reduces the early sulfur excitation effect, and the early strength of the test piece is gradually reduced; The early strength is slightly improved within a certain range; sulfur-fixed ash can be used as an stimulant to promote the hydration of steel slag and slag and react with its aluminum-bearing minerals to form ettringite.

Key words: Sulfur-fixed ash slag;steel slag;compressive strength ;XRD analysis

目录

摘 要 I

Abstract II

第一章 绪论 5

1.1研究背景 5

1.2固硫灰渣 5

1.2.1固硫灰渣的特性 5

1.2.2国内固硫灰渣研究应用现状 6

1.2.3国外固硫灰渣研究现状 7

1.3钢渣 8

1.3.1存在的难题 8

1.3.2钢渣的发展现状 8

1.4矿渣 9

1.4.1矿渣的特性 9

1.5固硫灰渣-钢渣复合体系制备 10

第二章 实验原料和实验方法 11

2.1 实验原料 11

2.1.1固硫灰渣 11

2.1.2钢渣 11

2.1.3 矿渣 12

2.1.4 水泥 12

2.2 主要实验设备 13

2.3 实验设计 13

2.4实验流程 14

2.5 材料性能测试方法 14

2.5.1抗压强度测定 14

2.5.2 XRD测定 14

第三章 研究结果与分析 16

3.1固硫灰渣-钢渣复合体系理论基础与制备 16

3.2固硫灰渣-钢渣复合体系力学性能 20

3.3固硫灰渣-钢渣复合体系体积稳定性 21

第四章 结论 23

4.1 结论 23

4.2存在问题 23

参考文献 24

致谢 25

第一章 绪论

1.1研究背景

随着我国城市化进程的推进，钢渣、矿渣等工业废渣产量越来越高，将其高效无污染的处理不仅能够减少堆放带来的环境污染的问题，还能进行废物利用，减少原料成本。将这些废渣作为矿物掺和料制作新型混凝土已经成为当前水泥行业的重点研究方向。

流化床燃煤固硫灰渣（以下简称固硫灰渣）是由一定比例的含硫煤以及固硫剂在混合后，在循环流化床锅炉内经850〜900°C燃烧固硫后，产生的固体废弃物^[1]。固硫灰渣含有大量SiO₂、Al₂O₃等矿物，具有较高火山灰活性^[1]，同时由于含有CaSO₄和CaO成分，固硫灰渣也具有一定的自硬性。

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