Energy saving blocks manufactured from lake sludge were investigated. Different contents of lake sludge (60%～100% by weight) were mixed with fly ash and additive. The blending strength, compressive strength of the fired samples were examined and compared with the Chinese National Standards (CNS). Results show that additive can result in the improvement of strength and blocks thermal conductivity is low. At the same time, fly ash and additive may also broaden the firing temperature range and reduce firing temperature. Toxic characteristic leaching procedure (TLCP) tests of blocks also show that the metal leaching level is low. The conditions for manufacturing good quality blocks are 80% sludge with 10% additive and 10% fly ash fired at 1000℃ for 60 min.%研究了利用武汉北湖污泥制备节能砌块.在不同含量污泥(60%～100%)中加入粉煤灰和添加剂,检验了烧成样品的强度并与相关国家标准比较.结果显示:加入添加剂能提高烧成样品的强度,砌块的导热系数较低,同时粉煤灰和添加剂也可以宽化烧成温度范围和降低烧成温度.烧成样品的毒物浸出试验显示重金属的浸出容量低于国家标准.较佳制备节能砌块的工艺条件为:80%的污泥+10%的添加剂+10%的粉煤灰,在1000℃保温60 min.
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