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| 高温下自密实混凝土的瞬态应变 | |
| 引用本文： | 陶津,柳献,袁勇,Luc. Taerwe.高温下自密实混凝土的瞬态应变[J].建筑材料学报,2009,12(1). |
| 作者姓名： | 陶津 柳献 袁勇 Luc. Taerwe |
| 作者单位： | 1. 同济大学,地下建筑与工程系,上海,200092;比利时根特大学Magnel混凝土实验室,根特9052;东南大学,土木工程学院,江苏,南京,210096 2. 同济大学,地下建筑与工程系,上海,200092;同济大学,岩土及地下工程教育部重点实验室,上海,200092 3. 比利时根特大学Magnel混凝土实验室,根特9052 |
| 摘 要： | 针对掺加聚丙烯纤维的自密实混凝土,进行了温度应变、自由膨胀应变和高温徐变的试验研究以及差热及热重分析、环境扫描电镜和汞压力测孔法试验.分析了温度和应力水平对自密实混凝土瞬态应变的影响;结合微观结构的变化特征,研究了自密实混凝土的瞬态应变发展规律及其产生机理.结果表明,温度与应力水平是影响自密实混凝土瞬态应变的主要因素;自由膨胀应变与温度呈非线性关系;混凝土微观孔隙结构的变化是产生自密实混凝土瞬态应变的内在因素. |
| 关 键 词： | 自密实混凝土 自由膨胀应变 温度应变 瞬态应变 高温徐变 |
Transient Strain of Self-compacting Concrete at High Temperature |
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| TAO Jin,LIU Xian,YUAN Yong.Transient Strain of Self-compacting Concrete at High Temperature[J].Journal of Building Materials,2009,12(1). | |
| Authors: | TAO Jin LIU Xian YUAN Yong |
| Affiliation: | TAO Jin~,LIU Xian~,YUAN Yong~ |
| Abstract: | Thermal strains,free thermal strain and short-time creep strain of self-compacting concrete(SCC) with addition of polypropylene fiber(PPF) were studied.Physical and chemical changes and microstructure during heating in concrete were studied by differential thermal and thermo gravimetric analysis,scanning electron microscopy and mercury instruction porosimetry.The influence of temperature and stress level on transient strain was investigated.Regular pattern and mechanism of transient strain were studied base... |
| Keywords: | self-compacting concrete free thermal strain thermal strain transient strain creep at high temperature |
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