| 挖孔桩混凝土异常硬化原因分析研究 |
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| 引用本文： | 石从黎,杨翔,宋开伟.挖孔桩混凝土异常硬化原因分析研究[J].施工技术,2011,40(7). |
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| 作者姓名： | 石从黎 杨翔 宋开伟 |
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| 作者单位： | 1. 重庆市建筑科学研究院,重庆,400015
2. 重庆建工集团,重庆,401122 |
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| 摘 要： | 针对重庆某工程挖孔桩混凝土异常硬化问题,采用物理试验、化学分析、X衍射分析和热分析等手段对异常硬化混凝土的物理性质、化学成分和矿物成分进行分析.结果表明:挖孔桩内混凝土含水率极高,强度低,但有明显的水泥水化产物存在;混凝土异常硬化的主要原因是挖孔桩内有渗水或积水造成混凝土严重离析分层,水化产物不能填满空隙,固体颗粒搭接少,导致混凝土疏松.
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| 关 键 词： | 挖孔桩 混凝土 异常硬化 含水率 |
Analysis on Reasons of Abnormal Hardening of Concrete in Bored Pile |
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| Shi Congli,Yang Xiang,Song Kaiwei.Analysis on Reasons of Abnormal Hardening of Concrete in Bored Pile[J].Construction Technology,2011,40(7). |
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| Authors: | Shi Congli Yang Xiang Song Kaiwei |
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| Affiliation: | Shi Congli1,Yang Xiang2,Song Kaiwei1(1.Chongqing Research Institute of Building Science,Chongqing 400015,China,2.Chongqing Construction Engineering Group Co.,Ltd.,Chongqing 401122,China) |
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| Abstract: | According to the problem about abnormal hardening of bored pile concrete in a project in Chongqing,the authors analyze physical properties,chemical composition and mineral composition of abnormal hardening concrete by physical examination,chemical analysis,X-ray diffraction and thermal analysis.The results show that bored pile concrete has high water content,low strength and obvious cement hydration products.The reason on abnormal hardening of concrete is that because of serious segregation of concrete caus... |
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| Keywords: | bored pile concrete abnormal hardening water content |
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