In this study, tannery sludge was used to synthesize a geopolymer with optimum mixing proportions of raw material determined using Design-Expert. Compressive strength and total chromium leaching concentration were considered as markers for evaluating the performance of the geopolymer as a building material. The durability of the geopolymer in terms of freeze-thaw resistance under sulfate attack and seawater corrosion resistance was also studied. X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy tests were performed for the micro-analysis. The results demonstrate that the geopolymer exhibited optimal performance when metakaolin, tannery sludge, sodium silicate, and sodium hydroxide used for the synthesis were mixed in the ratios 50.34%, 13.48%, 28.95%, and 7.23% (weight%), respectively (deionized water was added in a liquid-solid ratio (L/S) of 1:10 (mL/g)). For these mix proportions, the compressive strength of the geopolymer reached 50.37 MPa, while the total chromium leaching concentration was 2.440 mg/L (the chromium retention rate was 97.93%) at 7 days. Meanwhile, the geopolymer exhibited good resistance to seawater corrosion and certain anti-sulfate attack-freeze-thaw coupling ability. After 21 days of seawater corrosion test and 14 cycles of sulfate attack-freeze-thaw test, the compressive strength of the geopolymer was 32.64 MPa and 19.48 MPa, respectively. Thus, the geopolymer has potential as a building material in cold coastal environments.

在这项研究中，使用制革厂污泥合成具有最佳混合比例的地聚合物，该混合比例由Design-Expert确定。抗压强度和总铬浸出浓度被认为是评估地质聚合物作为建筑材料性能的标志。还研究了地质聚合物在硫酸盐侵蚀下的抗冻融性和耐海水腐蚀的耐久性。X射线衍射，傅里叶变换红外光谱和扫描电子显微镜测试进行了微观分析。结果表明，当用于合成的偏高岭土，皮革厂污泥，硅酸钠和氢氧化钠分别以50.34％，13.48％，28.95％和7.23％（重量％）的比例混合（去离子）时，地聚合物表现出最佳性能。以1:10（mL / g）的液-固比（L / S）添加水。对于这些混合比例，地质聚合物的抗压强度达到50.37 MPa，7天总铬浸出浓度为2.440 mg / L（铬保留率为97.93％）。同时，该地质聚合物表现出良好的抗海水腐蚀能力和一定的抗硫酸盐侵蚀-冻融耦合能力。经过21天的海水腐蚀测试和14个硫酸盐侵蚀-冻融测试循环后，地质聚合物的抗压强度分别为32.64 MPa和19.48 MPa。因此，该地质聚合物在寒冷的沿海环境中具有作为建筑材料的潜力。地质聚合物的抗压强度分别为32.64 MPa和19.48 MPa。因此，该地质聚合物在寒冷的沿海环境中具有作为建筑材料的潜力。地质聚合物的抗压强度分别为32.64 MPa和19.48 MPa。因此，该地质聚合物在寒冷的沿海环境中具有作为建筑材料的潜力。