| 废弃混凝土高温处理技术与脱水水泥浆再水化活性研究 |
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| 引用本文： | 马新伟,;韩兆祥,;李学英,;孟凡雷.废弃混凝土高温处理技术与脱水水泥浆再水化活性研究[J].青岛建筑工程学院学报,2009(4):93-97. |
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| 作者姓名： | 马新伟 ;韩兆祥 ;李学英 ;孟凡雷 |
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| 作者单位： | [1]哈尔滨工业大学（威海）土木工程系,威海264209; [2]哈尔滨工业大学材料科学与工程学院,哈尔滨150001; [3]哈尔滨工业大学土木工程学院,哈尔滨150001 |
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| 摘 要： | 建筑物在建设和拆除过程中产生大量的固体废弃物,其中大部分是废弃的混凝土和砂浆.为了使废弃混凝土和砂浆中的骨料和水泥重新得以应用.本研究对废弃混凝土和砂浆进行了高温处理,合理的高温处理温度为750℃经过高温处理后,可以实现骨料与水泥浆的分离.经过分离的骨料可以在新拌混凝土中重新应用,而脱水水泥浆经充分磨细后又重新具有了反应活性.把脱水水泥浆与水泥熟料或硅酸盐水泥复合,可以得到一种新型的水硬性胶凝材料.这种胶凝材料可以满足较低强度通用硅酸盐水泥的要求.由此建筑物建设和拆除过程中所形成的废弃混凝土和砂浆可以全部回收并重新利用.对减小资源消耗、节能减排有重要意义.
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| 关 键 词： | 废弃混凝土 脱水 回收 骨料 可持续发展 |
Thermal Treatment of Waste Concrete and the Rehydration Properties of the Dehydrated Cement Paste |
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| Affiliation: | MA Xin-wei, HAN Zhao-xiang, LI Xue-ying, MENG Fan-lei (1. Department of Civil Engineering, Harbin Institute of Technology (Weihai), Weihai 264209, China; 2. a. School of Materials Science and Engineering; b. School of Civil Engineering, Harbin Institute of Technology, Harbin 150001, China) |
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| Abstract: | Construction and demolition （C＆D） debris contributes a large amount of solid waste generation in China, in which concrete and cement motor are the main content. To reuse the aggregate and cement paste C＆D waste, the concrete rubbles were burned at 750 ℃, by which the aggregates were separated from the cement paste. The recycled aggregates were reused in fresh concrete and cement mortar, and the pulverized dehydrated cement paste can have reactivity again. By blending Portland cement and pulverized dehydrated cement paste, a new kink of cementing material is obtained. The strength of this cementing material can meet the requirement of lower strength cement. In this way, construction and demolition waste concrete and cement mortar, could be recycled and reused for the manufacture of new construction products; less natural resources and fuels are consumed and less green house gases are emitted. |
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| Keywords: | waste concrete dehydration recycle aggregate sustainable development |
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