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金属矿山 ›› 2022, Vol. 51 ›› Issue (01): 21-27.

• 工业固废资源化利用新理论与新技术 • 上一篇    下一篇

大掺量掘进煤矸石道路基层和混凝土的制备及力学性能研究

祝小靓1,2张明1王栋民3房奎圳3
  

  1. 1.中建西部建设建材科学研究院有限公司,四川 成都 610221;2.中建西部建设股份有限公司,四川 成都 610213;3.中国矿业大学(北京)化学与环境工程学院,北京100083
  • 出版日期:2022-01-15 发布日期:2022-02-07
  • 基金资助:
    “十三五”国家重点研发计划项目(编号:2019YFC1907200);四川省科技计划项目(编号:2021YJ0530)

Study on Preparation and Mechanical Properties of Road Base and Concrete with Large Amount of Drifting Coal Gangue

ZHU Xiaoliang1,2ZHANG Ming1WANG Dongmin3FANG Kuizhen3   

  1. 1.China West Construction Academy of Building Materials Co.,Ltd.,Chengdu 610221,China;2.China West Construction Group Co.,Ltd.,Chengdu 610213,China;3.School of Chemical and Environmental Engineering,China University of Mining and TechnologyBeijing,Beijing 100083,China
  • Online:2022-01-15 Published:2022-02-07

摘要: 掘进煤矸石是煤矿能源行业排放的一种工业固废,具有质地坚硬、性质稳定等特点,对掘进煤矸石道路基层及混凝土的制备及研究符合国家对推动建材行业碳达峰和加强大宗固废综合利用的愿景。将加工破碎后的掘进煤矸石替代道路基层和混凝土材料中的机制砂石,探讨了不同水泥掺量下的基层混合料、不同标号的掘进煤矸石砂混凝土材料、不同骨料类别及处理方式的C30混凝土材料力学性能的影响规律,论证了掘进煤矸石替代机制砂石骨料的技术可行性。研究结果表明:掘进煤矸石道路基层材料7 d无侧限抗压强度达34~65 MPa,满足中高等级公路基本要求;掘进煤矸石混凝土在中低标号下抗压强度基本满足要求,经水洗工艺的掘进煤矸石石料和改善级配的掘进煤矸石砂制备的C30混凝土强度有所提高。

关键词: 掘进煤矸石, 固废利用, 道路基层, 混凝土, 抗压强度

Abstract: Drifting coal gangue is a kind of industrial solid waste emitted by coal mine energy industry,which has the characteristics of hard texture and stable nature.The preparation and research of drifting coal gangue road base and concrete is in line with the national vision of promoting carbon peak in building materials industry and strengthening the comprehensive utilization of bulk solid waste.The broken drifting coal gangue is used to replace the mechanical aggregate in road base and concrete materials.The influence rules of mechanical properties of concrete with different cement dosage,different grades of drifting coal gangue sand concrete and C30 concrete with different aggregate types and treatment methods are discussed,and the technical feasibility of drifting coal gangue instead of mechanical aggregate is demonstrated.The research results showed that the 7 d unconfined compressive strength of drifting coal gangue road base material reaches 34~65 MPa,which meets the basic requirements of medium and high grade highway,the compressive strength of drifting coal gangue concrete basically meets the requirements under medium and low grade,and the strength of C30 concrete prepared by water washing process and improved gradation of drifting coal gangue sand is improved.

Key words: drifting coal gangue, solid waste utilization, road base, concrete, compressive strength