| 新拌混凝土坍落度损失的原因分析及控制 |
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| 引用本文： | 许将,陈洪光,汪富军,崔景亮.新拌混凝土坍落度损失的原因分析及控制[J].隧道建设,2010,30(6):652-655. |
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| 作者姓名： | 许将 陈洪光 汪富军 崔景亮 |
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| 作者单位： | 中铁隧道集团有限公司工程试验中心,河南,洛阳,471009 |
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| 摘 要： | 为解决夏季混凝土坍落度损失过大的问题，以渝利铁路工程为实例，从理论上分析混凝土坍落度经时损失的机制，并结合工程实际，从施工环境、混凝土原材料和配合比3方面进行分析，总结出坍落度损失过大的影响因素，提出采取夏季施工措施、更换和调节水泥和减水剂、合理调整配合比等解决办法，可为解决类似问题提供参考。
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| 关 键 词： | 泵送混凝土 坍落度损失 坍落度控制 |
| 收稿时间： | 2010-08-06 |
| 修稿时间： | 2010-10-17 |
Analysis on Causes for Slump Loss of Fresh Concrete and Countermeasures |
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| XU Jiang,CHEN Hongguang,WANG Fujun,CUI Jingliang.Analysis on Causes for Slump Loss of Fresh Concrete and Countermeasures[J].Tunnel Construction,2010,30(6):652-655. |
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| Authors: | XU Jiang CHEN Hongguang WANG Fujun CUI Jingliang |
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| Institution: | Engineering Test and Trial Center of China Railway Tunnel Group, Luoyang 471009, Henan, China |
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| Abstract: | The mechanisms of concrete slump loss are analyzed,with Chongqing-Lichuan railway works as an example,so as to solve the problem of high slump loss of concrete in summer.It is concluded that the causes for the slump loss include improper ambient environment,improper raw materials and improper mixing ratios.Proposal is made to take proper protection measures in summer seasons,use new cements and water-reducing agents and adopt proper mixing ratios.This paper can be used as reference to solve similar problems in the future. |
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| Keywords: | pumped concrete slump loss slump control |
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