The disposal of alum sludge (AS) produced from drinking water treatment plants is gradually becoming a threat to the environment. The conventional disposal by landfill is not feasible because AS is considered as hazardous waste. By contrast, treated alum sludge (TAS) contains useful chemical compounds (silicon dioxide and aluminium trioxide which are the main constituents of cement). This study explored the influence of TAS on the production of high-strength self-compacting concrete (HSSCC) made up of 5%, 10%, 15%, 20% and 25% cement replacement. The experimental work was divided into 15 mixes as well as three control mixes with three different water/powder (w/p) ratios (0.36, 0.38 and 0.4). The fresh properties of self-compacting concrete (SCC) were determined via the slump flow, V-funnel, V-funnel at T5 min and L-box tests to meet the flowability requirements. The strength and durability properties of SCC were also tested at different specimen ages. In addition, the effects of elevated temperature on TAS-incorporated concrete were observed at different temperatures for 3 h. Experimental results revealed the encouraging effects of TAS on the fresh, hardened and durability properties of HSSCC with maximum 15% of the cement component partially replaced with TAS. Meanwhile, losses of mass and strength were observed to be higher in the TAS-incorporated SCC than in the control concrete.

饮用水处理厂产生的明矾污泥（AS）的处置正逐渐成为对环境的威胁。由于AS被视为危险废物，因此传统的填埋处理是不可行的。相比之下，处理过的明矾污泥（TAS）包含有用的化合物（二氧化硅和三氧化二铝，它们是水泥的主要成分）。这项研究探讨了TAS对由5％，10％，15％，20％和25％的水泥替代品组成的高强度自密实混凝土（HSSCC）生产的影响。实验工作分为15种混合物以及三种水/粉（w / p）比率（0.36、0.38和0.4）的三种对照混合物。自压缩混凝土（SCC）的新鲜特性是通过坍落流，V型漏斗，T5分钟的V型漏斗和L型箱测试满足流动性要求。还在不同的标本年龄下测试了SCC的强度和耐用性。另外，在不同温度下观察了高温对掺有TAS的混凝土的影响达3小时。实验结果表明，TAS对HSSCC的新鲜，硬化和耐久性能具有令人鼓舞的作用，最大15％的水泥组分被TAS代替。同时，在掺有TAS的SCC中，观察到质量和强度的损失要比对照混凝土中的高。实验结果表明，TAS对HSSCC的新鲜，硬化和耐久性能具有令人鼓舞的作用，最大15％的水泥组分被TAS代替。同时，在掺有TAS的SCC中，观察到质量和强度的损失要比对照混凝土中的高。实验结果表明，TAS对HSSCC的新鲜，硬化和耐久性能具有令人鼓舞的作用，最大15％的水泥组分被TAS代替。同时，在掺有TAS的SCC中，观察到质量和强度的损失要比对照混凝土中的高。