摘要
为探究钢渣、锂渣和粉煤灰固废材料对透水混凝土性能的影响,在透水混凝土中掺入钢渣、锂渣和粉煤灰3种固废材料,并设计五因素四水平正交试验。通过极差分析法研究目标孔隙率、水胶比、钢渣掺量、锂渣掺量和粉煤灰掺量对透水混凝土力学性能和透水性能的影响,同时对其微观形貌进行分析。结果表明:影响透水混凝土力学性能和透水性能的主要因素为目标孔隙率、水胶比和锂渣掺量,次要因素为钢渣掺量和粉煤灰掺量。根据功效系数法得出的最优配合比:目标孔隙率为21%,水胶比为0.3,钢渣掺量为0,锂渣掺量为10%,粉煤灰掺量为15%。在此条件下,透水混凝土的最大抗压强度为28.8 MPa,最大抗折强度为4.7 MPa,最大透水系数为9.1 mm/s。SEM分析显示,未掺固废材料的透水混凝土整体结构较为疏松;适量掺入固废材料可促进水化反应,从而改善透水混凝土的宏观性能。
In order to explore the effects of steel slag,lithium slag and fly ash solid waste materials on the properties of permeable concrete,three solid waste materials including steel slag,lithium slag and fly ash,are added to the permeable concrete,and a five-factor and four-level orthogonal test is designed.The effects of target porosity,water-cement ratio,steel slag content,lithium slag content and fly ash content on the mechanical properties and permeability performance of permeable concrete are studied by range difference analysis,and its microscopic morphology is analyzed.The results show that the main factors affecting the mechanical properties and permeability performance of permeable concrete are target porosity,water-cement ratio and lithium slag content,while the secondary factors are steel slag content and fly ash content.The optimal mix ratio obtained according to the efficacy coefficient method:the target porosity is 21%,the water-cement ratio is 0.3,the steel slag content is 0,the lithium slag content is 10%,and the fly ash content is 15%.Under these conditions,the maximum compressive strength of permeable concrete is 28.8 MPa,the maximum flexural strength is 4.7 MPa,and the maximum permeability coefficient is 9.1 mm/s.SEM analysis shows that the overall structure of permeable concrete without solid waste material is relatively loose.Appropriate incorporation of solid waste materials can promote hydration reactions,thereby improving the macroscopic properties of permeable concrete.
作者
黄俊杰
朱洪威
HUANG Junjie;ZHU Hongwei(School of Civil Engineering and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China)
出处
《工程建设》
2025年第8期26-33,共8页
Engineering Construction
关键词
透水混凝土
锂渣
钢渣
粉煤灰
微观结构
正交试验
permeable concrete
lithium slag
steel slag
fly ash
microstructure
orthogonal test
