- 高仁辉1，曹巍缤2，庞超明3，*，刘家彬2，秦鸿根3
20223年第9期
摘要
引用本文
摘 要：分析了电厂燃煤炉渣的基本性能，设计了一种炉渣吸水率快速测试方法，研究了炉渣等体积替代部分河砂对不掺和掺机制砂预拌砂浆工作性和力学性能的影响。结果表明：炉渣具有质轻、多孔、吸水率高的特点，其中粒径在0.60 mm以下的颗粒占比在60%左右；用粒径为0~4.75 mm的烘干炉渣等体积替代10%、20%的河砂，会导致不掺机制砂的M10预拌砂浆的稠度和强度降低；用粒径为0~4.75 mm的饱和面干状态的炉渣等体积替代20%、40%的河砂，同时掺入适量砂浆改性剂和调节剂，可制备出性能要求满足M10的掺机制砂预拌砂浆，但其稠度仍明显低于未掺炉渣组的稠度；用粒径为0~0.60 mm的炉渣等体积替代38%、76%的同粒径河砂，同时掺入适量附加水、减水剂、砂浆改性剂和调节剂，可制备出性能要求满足M7.5、M10和M15的掺机制砂预拌砂浆，且其稠度较大，强度较高，其中，附加水量按炉渣质量乘以炉渣1 h吸水率的60%~70%计算；掺入适量激发剂可提高炉渣细粒料（粒径0~0.60 mm）的活性。
Abstract: The basic properties of coal-fired slag were analyzed, and a rapid testing method for water absorption rate of coal-fired slag was designed, and the effects of replacing part of river sand with coal-fired slag on the workability and mechanical properties of ready-mixed mortar without and with machine-made sand were studied. The results show that the coal-fired slag is lightweight, porous, and has a high water absorption rate, and the proportion of particles with the particle size below 0.60 mm is about 60%. Replacing 10% and 20% of river sand with the drying coal-fired slag with the particle size of 0~4.75 mm can lead to a decrease in the consistency and strength of M10 ready-mixed mortar without machine-made sand. Replacing 20% and 40% of river sand with coal-fired slag in a saturated surface dry state with the particle size of 0~4.75 mm, and adding an appropriate content of mortar modifier and regulator, the ready-mixed mortar with machine-made sand that meets the performance requirements of M10 can be prepared, but its consistency is still significantly lower than that of the group without coal-fired slag. Replacing 38% and 76% of the same particle size river sand with coal-fired slag with the particle size of 0~0.60 mm, and adding an appropriate content of additional water, water reducing agent, mortar modifier and regulator, the ready-mixed mortar with machine-made sand that meets the performance requirements of M7.5, M10 and M15 can be prepared, and the consistency and strength are high. Among which, the additional water content can be calculated by multiplying the coal-fired slag mass by 60%~70% of the 1 h water absorption rate of coal-fired slag. Adding an appropriate content of activator can improve the activity of fine-grained coal-fired slag with particle size of 0~0.60 mm.
高仁辉,曹巍缤,庞超明,等.电厂燃煤炉渣在预拌砂浆中的应用技术研究[J].混凝土与水泥制品,2023(9):80-85.
GAO R H,CAO W B,PANG C M,et al.Study on application technology of coal-fired slag in ready-mixed mortar[J].China Concrete and Cement Products,2023(9):80-85.
