摘要
“实现碳达峰、碳中和”作为国家的重大战略决策,各行业都要为节能减排事业做出贡献,钢渣作为一种可再利用材料备受青睐。本文设计试验采用控制变量法和正交试验法,以改性钢渣粉末(以下称MSP)和普通硅酸盐水泥为主要原料,添加粉煤灰、硅灰、膨胀剂和减水剂等材料制备试样,并测量其1d力学性能。通过对试验结果进行对比分析,了解MSP掺入对水泥基材料早期和晚期强度发展的影响规律。试验结果表明,掺加MSP可以加快水泥基材料凝结速度,显著提高水泥基材料的早期强度。通过正交试验结果筛选出的最优早强水泥基材料,MSP最佳掺量为11%,粉煤灰最佳掺量为4%,减水剂最佳掺量为0.3%,最佳水灰比为0.20,1d抗折强度和抗压强度最大可以达到6.47 MPa和36.64 MPa。用于某钢结构支护体系中,可以满足早强性能要求和实际工程需要。
“Achieving carbon peaking and carbon neutrality”as a major national strategic decision to achieve carbon peaking and carbon neutrality,all industries have to contribute to the cause of energy saving and emission reduction,and steel slag is favored as a reusable material.In this paper,we designed a test using the controlled variable method and orthogonal test method to prepare specimens with modified steel slag powder(hereinafter referred to as MSP)and ordinary silicate cement as the main raw materials,and add fly ash,silica fume,expansion agent and water reducing agent,and measure their 1d mechanical properties.The test results were compared and analyzed to understand the effect of MSP admixture on the early and late strength development of cementitious materials.The test results showed that the incorporation of MSP could accelerate the setting rate of cementitious materials and significantly improve the early strength of cementitious materials.The optimal early strength cementitious materials screened by the orthogonal test results,with the best admixture of MSP at 11%,the best admixture of fly ash at 4%,the best admixture of water-reducing agent at 0.3%,and the best water-cement ratio at 0.20,can reach the maximum 1d flexural strength and compressive strength of 6.47 MPa and 36.64 MPa.Used in a steel structure support system,it can meet the early strength performance requirements and practical engineering It can be used in a steel structure support system to meet the requirements of early strength performance and actual engineering needs.
作者
蒋育红
任建军
刘全威
杨辉
杨浩
余平
JIANG Yu-hong;REN Jian-jun;LIU Quan-wei;YANG Hui;YANG Hao;YU Ping
出处
《安徽冶金科技职业学院学报》
2023年第1期9-14,共6页
Journal of Anhui Vocational College of Metallurgy and Technology
基金
早强柔性超疏水高性能混凝土的开发资助项目(RH2100003197)
2020年安徽省住房城乡建设科学技术计划项目(2020-YF090)。
关键词
改性钢渣粉末
早强水泥基材料
异形缝隙填补
正交试验法
Modified steel slag powder
Early strength cement-based material
Profiled gap filling
Orthogonal test method
