| 陆振伟,张栋锐,华苏东,张亚男,任晓健,万奇林,胡玉冰,袁志洲,冯贵洋.碳化钢渣基胶凝材料在道路水稳层中的应用性能评价及机理研究*[J].水泥工程,2024,37(2):1-5 |
| 碳化钢渣基胶凝材料在道路水稳层中的应用性能评价及机理研究* |
| Application performance evaluation and mechanism study of carbonized steel slag based cementitious materials in road water stable layer |
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| DOI： |
| 中文关键词: 钢渣,碳化,安定性,水稳层 |
| 英文关键词: Steel slag,carbonization,stability,water stable layer |
| 基金项目:项目编号：社会发展——碳达峰碳中和科技创新专项资金（重大科技示范） ：BE2022608 |
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| 中文摘要: |
| 钢渣存在安定性不良的问题，将钢渣应用于水稳层，会存在钢渣分布不均匀，使试样出现膨胀开裂的现象。通过研究发现，对钢渣基胶凝材料进行碳化处理可以提高其体积稳定性，粒径较细的钢渣能够增大碳化反应面积，有利于提高碳化程度。本文对≥200目钢渣进行碳化处理，研究碳化时间和碳化温度对预碳化钢渣基胶凝材料的体积稳定性影响，并对其碳化机理进行探究；与建筑再生骨料制备水稳层，对其进行无侧限抗压强度和抗冻性测试。结果表明，随着碳化时间的和温度增加，预碳化钢渣基胶凝材料压蒸膨胀率逐渐降低，活性先增高后降低。在常压下，碳化温度为60 ℃，碳化时间为1.5 h的钢渣基胶凝材料相对活性最高。 |
| 英文摘要: |
| There is a problem of poor stability in steel slag. When steel slag is applied to the water stable layer, there will be uneven distribution of steel slag, leading to expansion and cracking of the sample. Through research, it has been found that carbonization treatment of steel slag based cementitious materials can improve their volume stability. Steel slag with finer particle size can increase the carbonization reaction area, which is beneficial for improving the degree of carbonization. This article investigates the effect of carbonization time and temperature on the volume stability of pre carbonized steel slag based cementitious materials by carbonizing steel slag with a mesh size of ≥ 200. It also prepares a water stable layer with recycled building aggregates and conducts unconfined compressive strength and frost resistance tests on it. The results show that with the increase of carbonization time and temperature, the rate of pre-carbide decreases, and the activity increases first and then decreases. At atmospheric pressure, the carbonization temperature of 60 ℃ and the carbonization time of 1.5 h had the highest relative activity. |
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