Mining College, Guizhou University
School of Mining Engineering, Guizhou Institute of Technology
Guizhou Qianchenglijin Technology Co., Ltd.
School of Energy and Mining Engineering, China University of Mining and Tech-nology (Beijing)

为解决高水材料充填成本高、物理力学性能差等问题,选用低标硫铝酸盐水泥熟料为主要原料,通过物理试验探究了低标硫铝酸盐水泥熟料高水材料在不同外加剂剂量、水灰比、水温下的物理力学性能,并通过工艺性试验测试了实际应用效果。研究结果表明:(1)不同条件下高水材料物理力学性能不同的主要原因在于其钙矾石的生成速率及生成量受到影响;(2)以低标型硫铝酸盐水泥熟料作为高水材料原料时,使用一定量外加剂能够改善其样貌并显著提升其强度;(3)降低水灰比能够显著提升高水材料的早期强度及峰值强度,且每提高0.1的水灰比,平均各龄期强度下降约11%;(4)水温对于高水材料初凝时间的影响高于终凝时间,对早期强度起促进作用,水温每上升2℃,1d强度增加约6.8%;(5)影响高水材料强度的各项因素排序为:外加剂>水灰比>水温;(6)现场应用低标型硫铝酸盐水泥熟料高水材料后,巷道变形量较小,取得较好的留巷效果。

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.

贵州省科技计划资助项目(黔科合支撑[2023]一般305)

陈志松,徐佑林,江泽标,等.基于低标硫铝酸盐水泥熟料的高水材料物理力学性能及应用[J].采矿与岩层控制工程学报,2024,6(2):023337.

CHEN Zhisong, XU Youlin, JIANG Zebiao, et al. Physical and mechanical properties and application of high-water materials based on low-standard sulfoaluminate cement clinker[J]. Journal of Mining and Strata Control Engineering, 2024, 6(2): 023337.