Alumina-containing water potabilization sludge (WPS) is one of the main wastes produced by reservoir management activities. This kind of residues, deriving from treatment processes for water potabilization, recently attracted great attention as starting raw material in the production of innovative building materials. In this study, the use of WPS as aluminosilicate source for the synthesis of geopolymers has been investigated. In particular, two different potabilization sludge deriving from the water treatment plants of two artificial water reservoirs have been selected. For both of the WPS, mineralogical (XRD analysis), physical-chemical (FTIR analysis), thermal (TGA-DSC analysis), porosimetric (BET analysis) and morphological (SEM analysis) properties have been evaluated. A thermal treatment at 650 °C has been performed on the two raw sludge in order to increase their reactivity. Geopolymeric samples have been produced by the hardening of the calcined WPS in two sodium silicate solutions, differing only by concentration, and using two curing temperatures. Obtained specimens have been widely characterized from chemical, mechanical and microstructural points of view. SEM, FTIR and XRD analyses confirmed that the geopolymeric reaction effectively took place for the samples produced by using the more concentrated solution and the higher curing temperature. In general, the mechanical performances reached by the specimens, suggest the possibility of a promising reuse of WPS as raw materials for the synthesis of geopolymer based building precast components.

含氧化铝的水化污泥（WPS）是水库管理活动产生的主要废物之一。这种残留物源自水的可处理化处理过程，最近作为创新建筑材料生产中的起始原料受到了极大的关注。在这项研究中，已经研究了使用WPS作为铝硅酸盐来源来合成地质聚合物的方法。特别地，已经选择了来自两个人工储水器的水处理厂的两种不同的增效污泥。对于这两种WPS，都评估了矿物学（XRD分析），物理化学（FTIR分析），热学（TGA-DSC分析），孔隙率（BET分析）和形态学（SEM分析）性能。为了提高它们的反应性，已对两种粗泥进行了650°C的热处理。通过在两种硅酸钠溶液中煅烧的WPS进行硬化（仅在浓度上有所不同）并使用两种固化温度来生产地质聚合物样品。从化学，机械和微观结构的角度对获得的标本进行了广泛的表征。SEM，FTIR和XRD分析证实，使用更高浓度的溶液和更高的固化温度可有效地对生成的样品进行地聚反应。通常，样品达到的机械性能表明，有希望将WPS用作合成基于地质聚合物的建筑预制构件的原材料。通过在两种硅酸钠溶液中煅烧的WPS进行硬化（仅在浓度上有所不同）并使用两种固化温度来生产地质聚合物样品。从化学，机械和微观结构的角度对获得的标本进行了广泛的表征。SEM，FTIR和XRD分析证实，使用更高浓度的溶液和更高的固化温度可有效地对生成的样品进行地聚反应。通常，样品达到的机械性能表明，有希望将WPS用作合成基于地质聚合物的建筑预制构件的原材料。通过在两种硅酸钠溶液中煅烧的WPS进行硬化（仅在浓度上有所不同）并使用两种固化温度来生产地质聚合物样品。从化学，机械和微观结构的角度对获得的标本进行了广泛的表征。SEM，FTIR和XRD分析证实，使用更高浓度的溶液和更高的固化温度可有效地对生成的样品进行地聚反应。通常，样品达到的机械性能表明，有希望将WPS用作合成基于地质聚合物的建筑预制构件的原材料。从化学，机械和微观结构的角度对获得的标本进行了广泛的表征。SEM，FTIR和XRD分析证实，使用更高浓度的溶液和更高的固化温度可有效地对生成的样品进行地聚反应。通常，样品达到的机械性能表明，有希望将WPS用作合成基于地质聚合物的建筑预制构件的原材料。从化学，机械和微观结构的角度对获得的标本进行了广泛的表征。SEM，FTIR和XRD分析证实，使用更高浓度的溶液和更高的固化温度可有效地对生成的样品进行地聚反应。通常，样品达到的机械性能表明，有希望将WPS用作合成基于地质聚合物的建筑预制构件的原材料。