煤矸石细集料-水泥基材料力学性能影响的试验研究  

EXPERIMENTAL RESEARCH ON THE INFLUENCE OF COAL GANGUE FINE AGGREGATE-CEMENT-BASED MATERIALS ON THE MECHANICAL PROPERTIES

作　　者：段晓牧[1,2] 夏军武[1,2] 杨风州 曹极昌 

机构地区：[1]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221116 [2]中国矿业大学力学与建筑工程学院,江苏徐州221116

出　　处：《工业建筑》2014年第2期98-102,共5页Industrial Construction

基　　金：国家自然科学基金项目(51274192);江苏省土木工程环境灾变与结构可靠性重点实验室开放研究基金项目(JSKL2012YB08);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：为促进煤矸石集料在水泥混凝土中的应用,选用自燃(活性)和非自燃(非活性)煤矸石作为细集料,研究水灰比、掺量、养护制度等不同条件下两种矸石细集料-水泥基材料力学性能的发展规律,分析煤矸石的种类、活性、掺量等因素对水泥基材料力学性能的影响。试验结果表明:活性矸石作为细集料,能够在水化初期与水泥水化产物发生一定程度的二次水化反应,水化反应能提高其早期强度;非活性矸石细集料-水泥基材料的强度随水灰比的增大而减小,而活性矸石则存在合理的水灰比范围;高温养护能够促进煤矸石细集料-水泥基材料的早龄期的水化进程,提高其早期抗压强度,但28d龄期中小掺量的矸石细集料-水泥基材料的抗压强度会产生高温负效应,而对抗折强度的影响则相反。The spontaneous combustion （active） and non-spontaneous combustion （inactive） two kinds of coal gangues were selected as fine aggregate to study the effect on the mechanical properties of its cement-based materials under the types of coal gangue, activity, dosage and other factors, and its mechanical properties development trend were discovered, which can provide a basis for the application of the coal gangue as aggregate. Results of the trial indicate that active coal gangue as fine aggregate had taken place the secondary hydrated reaction to a certain degree in the early hydration, hydrated reaction can promoted its early strength; inactive coal gangue-cement-based materials strength decreases with the increase in water-cement ratio, however active coal gangue exists a reasonable range. High temperature curing can promote its early hydration and its compressive strength, but at 28 d curing its compressive strength has the negative effects of high temperature with low dosage coal gangue, and an opposite effect on its flexural strength.

关 键 词：煤矸石 细集料 水泥基材料 活性 

分 类 号：TU528.041[建筑科学—建筑技术科学]