电镀污泥基胶凝材料的制备及性质分析

发布时间：2018-06-15 09:26

本文选题：电镀污泥 + 胶凝材料　；参考：《环境污染与防治》2017年07期

【摘要】：将电镀污泥作为混合材料掺到水泥中,取代部分水泥熟料制备电镀污泥基胶凝材料。测定了胶凝材料试样的标准稠度用水量、凝结时间、胶砂流动度、强度等物理性能指标,同时分析胶凝材料试样的微观水化性能与累积孔体积,测定了胶凝材料的重金属浸出浓度。结果表明,在电镀污泥掺量为0.5%(质量分数,下同)时,制备的胶凝材料试样强度达到《通用硅酸盐水泥》(GB175—2007)规定的52.5R级水泥强度标准;在掺量为1.5%、2.5%时,制备的胶凝材料试样强度达到GB 175—2007规定的42.5R级水泥强度标准,且重金属浸出浓度满足《危险废物鉴别标准浸出毒性鉴别》(GB 5085.3—2007)要求。微观测试表明,电镀污泥的掺入使得水化放热总量降低。
[Abstract]:Electroplating sludge was mixed into cement instead of some clinker to prepare electroplating sludge based cementitious material. The physical properties, such as standard consistency water consumption, setting time, cementing sand fluidity and strength, were measured. The microhydration properties and cumulative pore volume of cementing material samples were also analyzed. The heavy metal leaching concentration of cementitious materials was determined. The results show that when the amount of electroplating sludge is 0.5 and the mass fraction is the same, the strength of the cementitious material sample is up to the standard of 52.5R grade cement specified in GB175-2007, and when the dosage is 1.5, 2.5%, the strength of the cementing material is up to the standard of 52.5R grade cement. The strength of the cementitious material samples reached the 42.5R grade cement strength standard stipulated in GB 175-2007, and the leaching concentration of heavy metals met the requirements of "Hazardous waste Identification Standard leaching toxicity Identification" (GB5085.3-2007). The microcosmic test showed that the total amount of hydration heat release was decreased with the addition of electroplating sludge.
【作者单位】：南京工业大学环境学院;南京工大环境科技有限公司;
【分类号】：X781.1

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