论文总字数：26241字

摘 要

我国钢铁行业发展壮大，产生了大量以钢渣为主的固体废弃物，占用大量的土地资源并造成了一定程度的环境污染，钢渣混凝土是将钢渣作为建筑材料添加到混凝土中形成的新型混凝土，钢渣混凝土的研究和投入使用能够有效地处理大量堆积的钢渣，在降低生产成本的同时减少对环境的污染。另一方面，普通混凝土路面因其密实性而导致城市热岛效应不断恶化，已无法适应当前生态环境及城市交通的要求，透水混凝土则以其优良的透水性很好地契合了当前海绵城市的要求。由此可见，钢渣混凝土和透水混凝土都属于环境友好型材料，具有重要的研究价值。本课题旨在将二者结合起来，设计成一种新型混凝土，即钢渣混凝土，主要研究内容如下：

（1）归纳总结已有的钢渣透水混凝土试验研究及结论，确定水灰比、集灰比及减水剂用量，并以钢渣替代率为变量进行配合比设计，依此制作试件，探究不同的钢渣替代率对钢渣透水混力学性能和透水性能产生的影响，给出建议的钢渣替代率，作为下一步研究水灰比和集灰比对强度影响的替代率。

（2）选定建议的替代率作为钢渣替代率，以水灰比、集灰比作为试验变量进行配合比设计，制作钢渣透水混凝土试件，分别测定各组的强度，探究两个指标对钢渣透水混凝土力学性能的影响。

（3）分析试验结果，得到如下结论：钢渣替代率、水灰比及集灰比都能有效地影响钢渣透水混凝土的力学性能，钢渣的加入能有效提高混凝土的强度；钢渣替代率还能影响混凝土的透水性能；钢渣透水混凝土的力学性能和透水性能通常呈负相关。其中，水灰比固定时，随着集灰比的增大，钢渣透水混凝土抗压强度降低，透水系数增加；当集灰比不变，随着水灰比的增大，透水性能下降，抗压强度先提高后降低。混凝土强度随钢渣替代率的增加而提高。总结本次试验研究，最终可得到一组力学和透水性能均满足要求的钢渣透水混凝土配合比。

关键词：钢渣，透水混凝土，工作性能，透水系数

Abstract

China's steel industry has grown and produced a large number of solid wastes mainly composed of steel slag, occupying a large amount of land resources and causing a certain degree of environmental pollution. Steel slag concrete is a new type of concrete formed by adding steel slag as building materials to concrete. The research and commissioning of concrete can effectively deal with a large amount of accumulated steel slag, reducing production costs while reducing environmental pollution. On the other hand, the ordinary concrete pavement has been deteriorating due to its compactness, and it has been unable to adapt to the current ecological environment and urban traffic requirements. The permeable concrete is well suited to the requirements of the current sponge city due to its excellent water permeability. . It can be seen that both steel slag concrete and permeable concrete are environmentally friendly materials and have important research value. This project aims to combine the two to design a new type of concrete, namely steel slag concrete. The main research contents are as follows:

(1) Summarize the existing experimental research and conclusions of steel slag permeable concrete, determine the water-cement ratio, the ash-setting ratio and the amount of water-reducing agent, and design the mixture ratio with the steel slag replacement rate as the variable, and make the test pieces accordingly. The effect of the steel slag replacement rate on the mechanical properties and water permeability of the slag permeable to water, the recommended steel slag replacement rate, as a next step to study the replacement ratio of the water-cement ratio and the ash-to-ash ratio.

(2) Selecting the proposed replacement rate as the steel slag replacement rate, using the water-cement ratio and the ash-gear ratio as the experimental variables to carry out the mixture ratio design, making the steel slag permeable concrete test piece, respectively measuring the strength of each group, and exploring two indexes on the steel slag. The effect of mechanical properties of permeable concrete.

(3) Analyze the test results and obtain the following conclusions: steel slag replacement rate, water-cement ratio and dust-collecting ratio can effectively affect the mechanical properties of steel slag permeable concrete. The addition of steel slag can effectively improve the strength of concrete; steel slag replacement rate can also affect The water permeability of concrete; the mechanical properties and water permeability of steel slag permeable concrete are usually negatively correlated. Among them, when the water-cement ratio is fixed, with the increase of the ash-gathering ratio, the compressive strength of the steel slag permeable concrete decreases, and the water permeability coefficient increases; when the ash-to-ash ratio does not change, as the water-cement ratio increases, the water permeability decreases. The compressive strength is first increased and then decreased. The strength of the concrete increases as the replacement rate of the steel slag increases. Summarizing this experimental study, a set of steel slag permeable concrete mix ratios with mechanical and permeable properties are finally obtained.

KEY WORDS: steel slag, permeable concrete, working performance, permeability coefficient

目 录

摘 要 I

Abstract II

第一章 绪论 1

1.1 研究背景及意义 1

1.2 钢渣混凝土研究现状 3

1.2.1 力学性能 3

1.2.2 耐久性能 4

1.2.3 实际应用 4

1.3 透水混凝土研究现状 4

1.3.1 各项性能 5

1.3.2 优点及特点 7

1.3.3 实际应用 7

1.3 钢渣透水混凝土的研究现状 8

1.4 本文研究内容与技术路线 8

1.5.1 研究内容 8

1.5.2 技术路线 9

第二章 试验原材料、制作、性能测试及配合比设计方法 10

2.1 试验原材料 10

2.1.1 水泥 10

2.1.2 集料 10

2.1.3 减水剂 11

2.1.4 水 11

2.2 试件制作 11

2.2.1 搅拌工艺 11

2.2.2 成型 11

2.2.3 养护 12

2.3 性能测试方法介绍 13

2.3.1 抗压强度 13

2.3.2 劈裂抗拉强度 14

2.3.3 密度及吸水率 14

2.3.4 透水系数 15

2.3.5 压碎值 17

2.4 配合比设计 18

2.4.1 配合比设计原则 18

2.4.2 配合比参数的确定 18

2.4.3 配合比设计步骤 18

2.5 本章小结 20

第三章 钢渣透水混凝土的性能研究 21

3.1 钢渣的配合比设计 21

3.2 配合比中各项参数对强度的影响 21

3.2.1 数据结果 21

3.2.2 钢渣替代量对强度的影响 22

3.2.3 水灰比对强度的影响 23

3.2.4 集灰比对强度的影响 24

3.3 钢渣替代量对透水系数的影响 24

3.3.1 数据结果 24

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