论文总字数：15962字

摘 要

城市建设的飞速发展使我国的建筑垃圾排放量逐年增加，本就数额庞大的建筑垃圾量可能于近几年达到峰值。如果这些建筑垃圾不能得到及时且有效的利用，会对我们的生态环境造成长远和巨大的影响，尽可能地把建筑垃圾的回收资源化利用可以大幅减轻其危害。建筑垃圾再生微粉本身具有较低的活性，直接用于制备胶凝材料其强度很难达到技术要求。可以通过物理激发、化学活化和优化配比，提高建筑垃圾再生微粉胶凝材料的强度。

本文主要介绍建筑垃圾制成的再生微粉（其粒度通常定义为小于0.16mm）的基本性能和活性激发方式，研究再生微粉用于胶凝材料的可行性、再生微粉（过150目标准筛）不同掺量（10%、20%、30%）对胶凝材料的性能影响和不同的活性激发方式对胶凝材料的强度影响。

实验结果表明，再生微粉的主要化学成分与普通硅酸盐水泥基本相同，其自身具有一定的活性；通过物理活化和化学活化的方式可以激发再生微粉活性。随着再生微粉在胶凝材料中的比例增加，胶凝材料的标准稠度需水量逐渐增加；胶凝材料的凝结时间整体增加，取代20%和30%时初凝时间延长，初凝时间和终凝时间间隔缩短；胶凝材料的抗压强度随着再生微粉掺量增加呈降低趋势，且掺量越高降低趋势越大，掺量为30%时相比纯水泥抗压强度降低了36.2%。掺加激发剂1可以提高再生微粉胶凝材料的3d和7d抗压强度；激发剂2也可以改变胶凝材料的3d和7d强度。

关键词：建筑垃圾；再生微粉；胶凝材料；活性激发

Preparation and performance of recycled micro-powder cementitious materials from construction waste

Abstract

With the rapid development of urban construction, the amount of construction waste in China have been increasing year by year. Construction waste may reach the peak in recent years. If these construction waste cannot be used promptly and effectively, it will have a long-term and huge impact on our environment. Recycling construction waste as much as possible can greatly reduce its harm. Recycled micro-powder from construction waste has lower activity. If it is used directly to prepare cementitious materials, its compressive strength is difficult to meet the requirements. Physical strength and chemical activation can be used to increase the strength of recycled micro-powder cementitious materials from construction waste.

In this paper, it mainly introduced the properties and activation methods of recycled micro-powder from Construction Waste(particle size is usually less than 0.16 mm). The feasibility of using recycled micro-powder as cementitious material was studied. The influence of different content of recycled micro-powder(10%, 20%, 30%)on the properties of cementitious material and the influence of different activation methods on the strength of cementitious material were studied.

The results showed that the main chemical composition of the recycled micro-powder was the same as the Portland Cement. The recycled micro-powder could be activated by physical and chemical activation. With the increase of the proportion of recycled micro-powder, the water requirement of the standard consistency of the cementitious materials increased gradually. The setting time of the cementitious materials increased as a whole. The initial setting time was extended and the initial setting time and the final setting time interval were shortened when replacement was 20% and 30%.The compressive strength of the cementitious material decreased with the increase in the amount of recycled micro-powder. When the amount of recycled micro-powder was 30%, the compressive strength was reduced by 36.2%. The 3d and 7d compressive strength of recycled micropowder cementitious materials can be improved by adding activator 1, and the 3d and 7d compressive strength of the cementitious materials can also be changed by adding activator 2.

Key words：Construction waste；Recycled micro-powder；Cementitious material； Activation

目录

摘要 I

Abstract II

第一章 绪论 1

1.1 引言 1

1.2 研究现状 2

1.2.1 建筑垃圾再生微粉活化方法 2

1.2.2 建筑垃圾再生微粉国内研究现状 4

1.2.3 建筑垃圾再生微粉国外研究现状 5

1.3 研究内容及思路 5

第二章 实验部分 7

2.1 实验原料 7

2.1.1 水泥 7

2.1.2 建筑垃圾微粉 7

2.1.3 水 7

2.1.4 激发剂 7

2.2 实验设备 7

2.3 再生微粉材性分析 8

2.4 再生微粉用于胶凝材料实验 8

2.4.1 试验内容 8

2.4.2 标准稠度需水量 9

2.4.3 凝结时间 9

2.4.4 抗压强度 9

第三章 结果与讨论 10

3.1 引言 10

3.2 再生微粉材性 10

3.2.1 化学成分 10

3.3 建筑垃圾再生微粉胶凝材料性能测试 10

3.3.1 不同建筑垃圾微粉取代量对标准稠度需水量与凝结时间的影响 10

3.3.2 不同建筑垃圾微粉取代量对抗压强度的影响 11

3.3.3 激发剂对抗压强度的影响 11

第四章 总结与展望 13

4.1 结论 13

4.2 展望 13

参考文献 15

致谢 16

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