活性粉末混凝土不同龄期的力学性能研究  

Study on mechanical properties of reactive powder concrete at different ages

作　　者：李松 杨永民 焦楚杰[4] 袁继雄 LI Song;YANG Yongmin;JIAO Chujie;YUAN Jixiong(College of Urban and Rural Construction,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;Guangdong Lingnan Township Green Building Industrialization Engineering Technology Research Center,Guangzhou 510225,China;Institute of Sustainable Building and Energy Conservation,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]仲恺农业工程学院城乡建设学院,广东广州510225 [2]广东省岭南乡镇绿色建筑工业化工程技术研究中心,广东广州510225 [3]仲恺农业工程学院可持续建筑与节能研究所,广东广州510225 [4]广州大学土木工程学院,广东广州510006

出　　处：《仲恺农业工程学院学报》2024年第3期33-38,49,共7页Journal of Zhongkai University of Agriculture and Engineering

基　　金：国家自然科学基金项目(52078148);广东省自然科学基金面上项目(2022A1515010853);广州市科技局项目(2023A04J2004);广东省住房和城乡建设厅项目(GDZJ2022ZF001).

摘　　要：为研究活性粉末混凝土(Reactive Powder Concrete,RPC)常温养护下不同龄期力学性能,基于最紧密堆积原理设计C100、C120、C1403种强度的RPC配合比,通过标准方法,测得其抗压强度和轴压强度,在此基础上分析强度指标随龄期的变化规律.试验结果表明:RPC棱柱体破坏表现为自上而下的劈裂成片形态.RPC抗压强度和轴压强度随着龄期的增长总体上呈增大趋势,C140强度配比下,早期抗压强度发展缓慢,轴压强度则表现为早期(7~28 d)和后期(56~128 d)发展缓慢,中期(28~56 d)提升较快.RPC轴压强度与抗压强度表现为较强的线性关系,与龄期则表现为对数关系,其拟合曲线与试验结果吻合良好.常温养护下,随着龄期的增长,RPC强度持续的增长趋势明显,有较好的工程应用前景.To study the mechanical properties of reactive powder concrete(RPC)at different ages under normal temperature curing,the RPC mix ratio of C100,C120 and C140 was designed based on the most compact packing principle,and the compressive strength and axial compressive strength were measured by the standard method.The results indicated that the RPC prism was split into pieces from top to bottom.RPC compressive strength and axial compressive strength generally increased with curing age.Under the C140 strength ratio,the compressive strength developed slowly in the early stage,while the axial compressive strength developed slowly in the early(7~28 d)and late stages(56~128 d),but increased rapidly in the middle stage(28~56 d).RPC axial compressive strength shows a strong linear relationship with compressive strength,and a logarithmic relationship with curing age.The fitting curves were in good agreement with the experimental results.Under normal temperature curing,RPC strength has an obvious trend of continuous growth with the curing age,and possesses good engineering application prospects.

关 键 词：活性粉末混凝土 龄期 抗压强度 轴压强度 

分 类 号：TU528[建筑科学—建筑技术科学]