1.湖南高速建设工程有限公司;2.中交二公局萌兴工程有限公司;3.广东同创科鑫环保有限公司
1.Hunan Expressway Construction Engineering Co., Ltd;2.CCCC Second Highway Engineering Bureau Mengxing Engineering Co., Ltd;3.Guangdong Tongchuang Kexin environmental protection Co., Ltd
采用山东枣庄燃煤电厂炉底渣，粉磨后与硅酸盐水泥和石灰石粉混合制备复合粉，使用碳酸盐作为激发剂，并通过物理发泡手段制备炉渣基泡沫轻质土路用材料。重点研究炉渣轻质土的湿容重对力学性能、工作性能、消泡率和孔隙率的影响。实验结果表明:燃煤炉渣基轻质土无侧限抗压强度随湿容重降低大幅衰减，流动扩展度随泡沫率的增大呈线性降低，轻质土消泡率在650~750kg/m3湿容重的范围内变化不大。考虑各项性能指标，当采用炉渣占比50%，水泥掺量40%，石灰石粉10%，外掺4%激发剂制备650 kg/m3容重轻质土，可较好满足现浇轻质土的工作性能，同时消泡率较低。试样3d强度达0.79 MPa，28d强度可达1.63 MPa。
The slag from the furnace bottom in Shandong province is mixed with Portland cement and limestone powder to prepare composite powder. Carbonate was used as the activator, and the coal-fired slag-based foam lightweight soil road materials are prepared by physical foaming method. The influence of wet volume-weight of slag base lightweight soil materials on mechanical properties, working performance, defoaming rate and porosity was studied. The results show that the unconfined compressive strength of slag-based lightweight soil decreases greatly with the decrease of wet unit weight, and the flowability decreases linearly with the increase of foam rate. The defoaming rate of lightweight soil has little change in the range of 650~750kg/m3 wet volume-weight. Considering various performance factors, lightweight soil with 650 kg/m3, Slag accounts for 50%, cement for 40%, limestone powder for 10%, and the activator admixture dosage for 4% can be prepared, which can better meet the workability of foamed lightweight soil, and the defoaming rate is low. 3d strength of sample can reach 0.79 MPa and 28d strength can reach 1.63 MPa.
