| 煤矸石集料混凝土抗压强度及耐久性能 |
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| 引用本文： | 马宏强,易成,朱红光,董作超,陈宏宇,王佳欣,李德毅. 煤矸石集料混凝土抗压强度及耐久性能[J]. 材料导报, 2018, 32(14): 2390-2395 |
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| 作者姓名： | 马宏强 易成 朱红光 董作超 陈宏宇 王佳欣 李德毅 |
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| 作者单位： | 中国矿业大学(北京)力学与建筑工程学院;江苏科技大学土木工程与建筑学院 |
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| 基金项目： | 国家自然科学基金(51578539)；北京市自然科学基金(8164061) |
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| 摘 要： | 以煤矸石-普通碎石混合作为粗集料制备了一系列混凝土试样,其中煅烧和未煅烧煤矸石等量替代普通碎石的掺量为0%、30%、50%、70%和100%,探究了煤矸石粗集料掺量和700℃煅烧对混凝土抗压强度、快速氯离子渗透、抗碳化性能和抗硫酸盐侵蚀性能的影响,并借助X射线衍射仪(XRD)观测矿物成分变化,利用扫描电子显微镜(SEM)观测微观结构。实验结果表明煤矸石作混凝土集料是可行的,最大掺量受混凝土设计强度和所处环境的限制。煤矸石与胶凝材料粘结处空腔的存在不利于混凝土抗压强度和耐久性能,但对固化氯离子性能有利。相比于掺未煅烧煤矸石的混凝土,掺煅烧煤矸石的混凝土的内部结构更致密,但煅烧煤矸石自身的缺陷导致其未获得较大优势。后续研究将致力于更大程度地激发煅烧煤矸石集料的活性以更好地发挥其优势。本研究为煤矸石的大宗高效利用提供试验基础和理论依据。
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| 关 键 词： | 煤矸石 抗压强度 快速氯离子渗透 抗碳化性能 抗硫酸盐侵蚀 粗集料混凝土 |
Compressive Strength and Durability of Coal Gangue Aggregate Concrete |
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| MA Hongqiang,YI Cheng,ZHU Hongguang,DONG Zuochao,CHEN Hongyu,WANG Jiaxin and LI Deyi. Compressive Strength and Durability of Coal Gangue Aggregate Concrete[J]. Materials Review, 2018, 32(14): 2390-2395 |
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| Authors: | MA Hongqiang YI Cheng ZHU Hongguang DONG Zuochao CHEN Hongyu WANG Jiaxin LI Deyi |
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| Affiliation: | School of Mechanics and Civil Engineering, China University of Mining and Technology Beijing, Beijing 100083,School of Mechanics and Civil Engineering, China University of Mining and Technology Beijing, Beijing 100083,School of Mechanics and Civil Engineering, China University of Mining and Technology Beijing, Beijing 100083,School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212005,School of Mechanics and Civil Engineering, China University of Mining and Technology Beijing, Beijing 100083,School of Mechanics and Civil Engineering, China University of Mining and Technology Beijing, Beijing 100083 and School of Mechanics and Civil Engineering, China University of Mining and Technology Beijing, Beijing 100083 |
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| Abstract: | |
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| Keywords: | coal gangue compressive strength rapid chloride ion penetration anti-carbonation performance resistance to sulfate attack coarse aggregate concrete |
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