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| 水泥比表面积对碾压混凝土力学性能的影响 |
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石泉1,龚英2,蔡跃波2,丁建彤2,陈波2
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1. 新疆维吾尔族自治区水利厅,新疆,乌鲁木齐,830000
2. 南京水利科学研究院,江苏,南京,210029
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| 摘要: |
| 为探索粗水泥用于提高碾压混凝土(RCC)抗裂性的可行性,首先要研究水泥比表面积对RCC力学性能的影响.测试了5种比表面积(258～413 m2/kg)的P·I水泥胶砂强度等物理性能,分析了这5种水泥配制的三级配RCC力学性能及极限拉伸值的差异.结果表明,比表面积为258 m2/kg的粗P·I水泥仍满足42.5水泥强度要求;RCC抗压强度、轴心抗拉强度基本不随水泥比表面积的变化而变化;粗水泥配制的RCC的28 d抗拉弹模较低且极限拉伸值较大,90 d、180 d的抗压强度增长率、轴心抗拉强度增长率及抗拉弹模增长率均较大,说明粗水泥有助于提高RCC的抗裂性能. |
| 关键词: 碾压混凝土 水泥比表面积 力学性能 极限拉伸值 抗裂性能 |
| DOI： |
| 分类号:TV431 |
| 基金项目:国家自然科学基金委员会、二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目
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水利部公益性行业科研专项经费项目 |
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| Fineness influence of cement on mechanical properties of RCC |
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SHI Quan1,GONG Ying2,CAI Yue-bo2,DING Jian-tong2,CHEN Bo2
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SHI Quan1,GONG Ying2,CAI Yue-bo2,DING Jian-tong2,CHEN Bo2(1.Department of Water Resources of Xinjiang Uygur Autonomous Region,Urumqi 830000,China,2.Nanjing Hydraulic Research Institute,Nanjing 210029,China)
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| Abstract: |
| To investigate the possibility of improving cracking-resistance of RCC by using coarse cement,it is necessary to study relationship between specific surface area(SSA) of cement and mechanical properties of RCC.Physical properties of cements with five different SSAs(258~413 m2/kg) are tested,such as mortar strength.Mechanical properties and ultimate tensile strain capacity of five kinds of RCC mixed in cements with different SSA are compared.Results show that at 28 d,the compressive strength of mortar made w... |
| Key words: RCC specific surface area of cement mechanical properties ultimate tensile strain capacity cracking resistance |
