市政技术2026，Vol.44Issue(4)：16-22,31,8.DOI:10.19922/j.1009-7767.2026.04.016
风积砂-煤矸石混凝土基本力学特性研究
Basic Mechanical Properties of Aeolian sand-Coal gangue Concrete
摘要
Abstract
The reserves of aeolian sand(AS)and bulk solid waste coal gangue(CG)in Northern Shaanxi are rich with lower comprehensive utilization rate.It is of great practical significance to realize the resource utilization of the two in the field of building materials.The AS-CG concrete was prepared with raw materials of CG in Northern Shaanxi mining area and AS in Mu Us Desert.The effects of coal gangue replacement rate(CGR)and aeolian sand replace-ment rate(A SR)on the workability(slump)and mechanical properties(compressive strength)of concrete were studied.The influence mechanism of CG and as on the compressive strength of concrete was revealed by scanning electron microscope(SEM)and X-ray diffraction(XRD).The results show that the slump of concrete increases with the increase of A SR and decreases with the increase of CGR.The compressive strength of concrete increases first and then decreases with the increase of ASR and CGR.When ASR=25％and CGR=25％,the compressive strength of concrete reaches the maximum.The reason of AS affecting the mechanical properties of concrete is that it can im-prove the aggregate particle gradation and ITZ structure;The reason of CG affecting the mechanical properties of concrete is its pore development,strong water absorption,low strength and certain chemical activity.Therefore,it is feasible to prepare concrete with AS and CG.关键词
风积砂/煤矸石/力学特性/影响机理/微观结构Key words
aeolian sand/coal gangue/mechanical property/influence mechanism/microstructure分类
建筑与水利引用本文复制引用
李玉根,张浩楠,亢玉宁,陈鸿峪,陆睿,余钊..风积砂-煤矸石混凝土基本力学特性研究[J].市政技术,2026,44(4):16-22,31,8.基金项目
国家自然科学基金项目(52268047,51868075) （52268047,51868075）
榆林市科技局项目(2023-CXY-145) （2023-CXY-145）
榆林高新区科技局项目(YGXKG-2023-106) （YGXKG-2023-106）
榆林学院博士启动基金(22GK11) （22GK11）
