摘要
在泡沫轻质土中以橡胶颗粒替代部分水泥,并掺入聚丙烯纤维,分析了橡胶颗粒替代率、橡胶颗粒粒径、纤维掺量、湿密度对高弹聚合物纤维流态固化轻质土(EPFFC)的抗压强度、静力和动态弹性模量的影响,并分析影响机理。结果表明,橡胶颗粒替代率与EPFFC的抗压强度和刚度呈负相关,其替代率应控制在10%以内,但其同时提升了EPFFC变形和减震能力;橡胶颗粒粒径为0.85 mm时有助于形成骨架结构,提高EPFFC抗压强度,且不会过多阻碍水化反应;纤维掺量为0.2%时,形成了三维网状结构,此时抗压强度最高,静力、动态弹性模量明显增强。由于孔结构趋于稳定,湿密度与EPFFC刚度呈正相关,并且在湿密度由600 kg/m^(3)增长到800 kg/m^(3)时,模量增幅最大。
The article replaces part of cement with rubber particles in foam light soil,and add polypropylene fiber,and analyzes the effects of rubber substitution rate,rubber particle size,fiber content,and wet density on the compressive strength,static and dynamic modulus of Highly Elastic Polymers Fiber Foamed Concrete(EPFFC),and analyzes the influencing mechanism.The results show that the rubber substitution rate is negatively related to the strength and stiffness of EPFFC,and its substitution rate should be controlled within 10%,but it has the ability to enhance the deformation and vibration damping of EPFFC;the rubber particle size helps to form the skeleton structure,and at the same time,it will impede the occurrence of the hydration reaction,and the optimal rubber particle size is 0.85 mm;When the fiber content is 0.2%,a three-dimensional network structure is formed,at which the compressive strength is the highest,and the static and dynamic elastic moduli are significantly enhanced.Because the pore structure tends to be stable,the wet density is positively correlated with the stiffness of the EPFFC,and the modulus increase is the largest when the wet density increases from 600 to 800 kg/m^(3).
作者
梁稽哲
陶建利
简一军
王岩梓
李存生
张昕毅
张宏博
LIANG Jizhe;TAO Jianli;JIAN Yijun;WANG Yanzi;LI Cunsheng;ZHANG Xinyi;ZHANG Hongbo(Jishang Expressway(Heze)Co.Ltd.,Heze 274000,China;China Highway Engineering Consulting Group Co.Ltd.,Beijing 100089,China;School of Qilu Transportation,ShanDong University,Ji'nan 250061,China)
出处
《新型建筑材料》
2025年第2期59-65,共7页
New Building Materials
基金
国家重点研发计划项目(2022YFB2602102)。
