To address challenges related to the high cost and suboptimal physical and mechanical properties of high-water content materials,this study selected low-grade sulfoaluminate cement clinker as the primary raw ma-terial.Through physical experiments,it investigated the physical and mechanical behaviors of high-water materi-als prepared from low-grade sulfoaluminate cement clinker under varying conditions of admixture dosage,water-to-cement ratio,and water temperature.Process experiments further assessed the efficacy of these materials in practical applications.The findings revealed:(1)Variations in the physical and mechanical properties of high-water materials under different conditions are primarily due to the affected rate and quantity of ettringite for-mation.(2)Utilizing low-grade sulfoaluminate cement clinker as the raw material and adding specific admixtures significantly improved the appearance and strength of the high-water materials.(3)Reducing the water-to-cement ratio markedly enhanced both the early and peak strengths of the high-water materials,with an average strength decrease of about 11%for every 0.1 increase in the ratio.(4)Water temperature more significantly influenced the initial setting time than the final setting time of high-water materials and positively affected early strength,with a 2℃increase in temperature resulting in approximately a 6.8%strength increase after one day.(5)The order of factors affecting the strength of high-water materials was admixture＞water-to-cement ratio＞water temperature.(6)The field application of high-water materials made from low-grade sulfoaluminate cement clinker resulted in minimal roadway deformation,achieving satisfactory airfilling outcomes.
国家科技期刊平台
NSTL
维普
万方数据
