| 砖混类再生微粉泡沫胶凝材料力学性能研究 |
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| 引用本文： | 崔宁,栾仲豪.砖混类再生微粉泡沫胶凝材料力学性能研究[J].硅酸盐通报,2022,41(7):2421-2429. |
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| 作者姓名： | 崔宁 栾仲豪 |
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| 作者单位： | 1.北京市市政工程研究院,北京 100037; 2.北京市建设工程质量第三检测所有限责任公司,北京 100037 |
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| 摘 要： | 利用建筑垃圾制备的再生微粉,可以有效替代水泥,减少水泥资源的使用,提高建筑垃圾的资源利用率。本文通过气泡参数分析、力学性能测试等方法,研究了砖混类再生微粉和发泡剂掺量对低强度泡沫胶凝材料力学性能的影响。结果表明:再生微粉的掺入会导致胶凝材料抗压强度降低,微粉掺量大于水泥时,胶凝材料抗压强度随再生微粉掺量增加而小幅提高;浆体流动度随再生微粉掺量的增加先降低后增高;再生微粉掺量较小时,发泡剂掺量对浆体流动性影响较大,而当微粉掺量较大时,发泡剂掺量对浆体流动性无显著影响;不同批次再生微粉性能差异较小。通过调节再生微粉和发泡剂掺量可制备满足不同力学性能需求,同时具有良好流动性的泡沫胶凝材料。
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| 关 键 词： | 建筑垃圾 再生微粉 泡沫混凝土 胶凝材料 微观分析 力学性能 |
| 收稿时间： | 2022-03-10 |
Mechanical Properties of Recycled Fine Powder Foamed Cementitious Materials for Brick and Concrete |
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| CUI Ning,LUAN Zhonghao.Mechanical Properties of Recycled Fine Powder Foamed Cementitious Materials for Brick and Concrete[J].Bulletin of the Chinese Ceramic Society,2022,41(7):2421-2429. |
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| Authors: | CUI Ning LUAN Zhonghao |
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| Affiliation: | 1. Beijing Municipal Engineering Research Institute, Beijing 100037, China; 2. Beijing Construction Engineering Quality Third Test Institute Co., Ltd., Beijing 100037, China |
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| Abstract: | The recycled fine powder from construction waste can effectively replace cement, reduce the use of cement resources, and improve the resource utilization rate of construction waste. In this paper, the effects of brick-concrete recycled fine powder and foaming agent content on the mechanical properties of low-strength foamed cementitious materials were studied by methods such as bubble parameter analysis and mechanical property test. The results show that the addition of recycled fine powder leads to a reduction in the compressive strength of the cementitious material. The strength of the cementitious material increases slightly with the addition of recycled fine powder, when the amount of fine powder is higher than that of cement. At the same time, the flowability of slurry decreases first and then increases with the increase of recycled fine powder. When the amount of recycled fine powder is small, the amount of foaming agent has a great effect on the flowability of slurry, but when the amount of recycled fine powder is large, the amount of foaming agent has no significant influence on the flowability of slurry. The performance of different batches of recycled fine powder is almost the same. By adjusting the content of recycled fine powder and the foaming agent, foam cementitious materials that meet the requirements of different mechanical properties and have good fluidity can be prepared, which can meet the large-scale promotion in low-grade backfill materials. |
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| Keywords: | construction waste recycled fine powder foamed concrete cementitious material micro-analysis mechanical property |
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