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李   倩

 

( 煤炭工业石家庄设计研究院有限公司 , 石家庄   050000)

摘  要 : 推动煤矸石基地聚合物混凝土的应用 ,  可解决煤矸石再利用困难和利用率低的问题 。以原状煤矸石为粗骨料 , 煤矸石粉 、粉煤灰为胶凝材料制备地聚合物混凝土 , 分析了不同煤矸石粉掺量时力学强度 、抗氯离子渗透性能 、抗冻性能的变化规律 。结果表明 :  随煤矸石粉掺量增加 , 抗压 、劈裂抗拉强度减小 , 氯离子渗透系数增大 , 40%掺量时满足 C40 强度和中等抗氯离子渗透等级 ;  随冻融循环次数增加 , 质量损失率增大 、相对动弹性模量减小 , 增大煤矸石粉掺量 , 质量损失率增幅和相对动弹性模量降幅均增大 , 40%掺量可抵抗 150 次冻融循环 ; 煤矸石基地聚合物混凝土中煤矸石粉掺量宜为 40% 。研究成果可为煤矸石资源化利用提供理论依据。

关键词 : 煤矸石 ; 地聚合物 ; 强度 ; 氯离子渗透 ; 冻融循环

中图分类号 : TU528. 59           文献标志码 : A           文章编号 :  1005- 8249  (2026)  03-0050-06

DOI :10. 19860/j. cnki. issn1005- 8249. 2026. 03. 009

 

LI Qian

( Shijiazhuang Design and Research Institute of Coal Industry Co. , Ltd. ,  Shijiazhuang 050000 , China)

Abstract :  Promote the application of gangue base polymer concrete , can solve the problem of gangue reuse difficulties and low utilization rate.   With the original gangue as coarse aggregate , gangue powder , fly ash as cementitious material preparation of the ground polymer  concrete ,  analyzed  the  different gangue powder admixture  when the mechanical strength , anti - chlorine ion permeability performance , anti-freezing  performance  of the  change  rule.   The  results  show that :  with  the increase of  gangue powder mixing , compressive , splitting tensile strength decreases , chloride ion permeability coefficient increases , 40% mixing to meet the C40 strength and medium anti-chlorine ion permeability grade ; with the increase in the number of freezing and thawing cycles , the mass loss rate increases , the relative kinetic elasticity modulus decreases , increase the gangue powder mixing , the mass loss rate increase and the relative kinetic elasticity modulus decreases increase , 40% mixing to resist 150 times of freezing and thawing cycles.   150 freeze-thaw cycles ; gangue base polymer  concrete  in the gangue powder mixing appropriate for 40% . The research results can provide theoretical basis for the utilization of gangue resources.

Key words :  coal gangue ; geopolymer; strength; chloride penetration; freeze-thaw cycle