| 泵送高强轻骨料混凝土的抗离析性能的试验研究 |
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| 引用本文： | 李渝军 丁建彤. 泵送高强轻骨料混凝土的抗离析性能的试验研究[J]. 四川建筑科学研究, 2005, 31(5): 103-107 |
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| 作者姓名： | 李渝军 丁建彤 |
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| 作者单位： | [1]清华大学土木工程系,北京100084 [2]南京水利科学研究院材料结构所,江苏南京210024 |
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| 基金项目： | 交通部2002年西部开发交通科技项目2002-318-767-31：云南省科技厅2001年省院省校科技合作项目2001BBBCA15A010资助 |
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| 摘 要： | 为减少泵送高强轻骨料混凝土在振捣过程中轻骨料的上浮现象，使用5种不同轻骨料，选择了拌和物密度、粗骨料质量以及抗压强度3种评价拌合物抗振捣分离性指标，系统研究了轻骨料体积含量、振捣时间、轻骨料特性（包括外形、表面光滑度、吸水率）和矿物掺和料以及外加剂对低水胶比的泵送高强轻骨料混凝土抗离析性的影响。
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| 关 键 词： | 高强轻骨料混凝土 振捣 抗离析性 分层度 抗压强度 |
| 文章编号： | 1008-1933（2005）05-0103-05 |
| 收稿时间： | 2005-01-31 |
| 修稿时间： | 2005-01-31 |
Segregation capability of fresh high strength lightweight aggregate concrete |
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| LI Yu-jun, DING Jian-tong. Segregation capability of fresh high strength lightweight aggregate concrete[J]. Building Science Research of Sichuan, 2005, 31(5): 103-107 |
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| Authors: | LI Yu-jun DING Jian-tong |
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| Affiliation: | 1. Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 2. Materials and Structure Department, Nanjing Hydraulic Research Institute, Nanjing 210024,China |
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| Abstract: | To reduce the segregation of fresh high strength lightweight aggregate concrete(HSLWAC) in vibrating process,the vibrating-layering tests were carrying out with 5 types of lightweight aggregates.The segregation capability is judged by the layering degree,the layering degree is calculated by 3 methods,including the density difference,the coarse aggregate mass difference and the difference of compressive strength molding by that between roof and bottom.Investigated the factors of LWA's volume quantity,vibrating time,and the characters of LWA(include external form,surface smooth level,water absorption),mineral additives and admixtures in the segregation of pumping HSLWAC with lower water to binder ratio. |
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| Keywords: | high strength lightweight aggregate concrete(HSLWAC) vibrating segregation capability layering degree compress strength |
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