摘要
选取不同质量比的焦炭、粉煤灰和金尾矿粉作为填料制备硫磺混凝土(SC),研究不同填料SC的强度、变形特性、抗氯离子渗透性、冻融循环耐久性,测试SC的水稳性能和高温抗车辙等路用性能。结果表明,硫磺掺量一定时,粉煤灰掺量越多,SC的峰值应力越高;使用焦炭制成的SC峰值应力低于金尾矿粉制成的SC,填料中含有金尾矿粉的SC抗压和劈裂抗拉强度较高;随着硫磺掺量的增加,SC的孔隙率下降,抗氯离子渗透性能明显提高;与未冻融时相比,经历200次冻融循环后,硫磺掺量为30%时SC的峰值强度降低了29.5%,屈服强度降低了30.2%,杨氏模量降低了41.5%;金尾矿粉替代焦炭的SC动稳定度更大,高温抗车辙能力更强。
Selecting coke,fly ash,and gold tailings with different mass ratios as fillers to prepare sulfur concrete(SC),the strength,deformation characteristics,chloride ion permeability resistance,freeze-thaw cycle durability of SC with different fillers were studied,and the water stability and high-temperature resistance to rutting of SC were tested.The results show that when the sulfur content is constant,the higher the fly ash content,the higher the peak stress of the concrete.The peak stress of SC made from coke is lower than that of SC made from gold tailings powder,and the compressive strength and splitting tensile strength of SC containing gold tailings powder in the filler are higher.As the sulfur content increases,the porosity of SC decreases and the chloride ion permeability significantly improves;After 200 freeze-thaw cycles,the peak strength decreased by 29.5%,the yield strength decreased by 30.2%,and the Young's modulus decreased by 41.5% when the sulfur content was 30%.The use of gold tailings powder as a substitute for coke results in greater SC dynamic stability and stronger high-temperature resistance to rutting.
作者
彭杰
李海凤
郑吉卉
秦广付
PENG Jie;LI Haifeng;ZHENG Jihui;QIN Guangfu(Linzhou Vocational and Technical College of Architecture,Linzhou 456500,China;Housing and Urban Rural Development Bureau of Long'an District,Anyang 455500,China;Tianjin Hongtu Environmental Engineering Co.Ltd.,Tianjin 300380,China)
出处
《新型建筑材料》
2024年第5期78-82,共5页
New Building Materials
基金
国家自然科学基金项目(52008377)。
关键词
硫磺混凝土
应力-应变曲线
路用性能
氯离子渗透
冻融循环
sulfur concrete
stress-strain curve
road performance
chloride ion permeation
freeze-thaw cycle
