铁尾矿免烧砖的制备及性能研究

A Study on Preparation and Properties of Baking-free Brick by Iron Tailings

以商洛铁尾矿为主要原料,以河沙为骨料、水泥为凝胶材料,并结合少量添加剂(缓凝剂、减水剂)制备MU15级免烧砖,研究了河沙与尾矿比例、水泥用量、水胶比对免烧砖的力学性能的影响。结果表明:铁尾矿与河沙5:4,水泥用量占河沙与铁尾矿总质量的15%,用水量占固料总量的15%,养护时间28 d可制得抗压强度、抗折强度均达到MU15级标准的掺尾矿免烧砖。

Using iron tailings, river sand, cement, and a small amount of additives （retarder and water reducing agent） to prepare the level-MU15 baking-free brick, the mechanical properties are discussed by change of the proportion of river sand and tailings, the dosage of the water and the dosage of cement. The results show that the best preparation condition is that the proportion of river sand and tailings being 5：4, the cement accounting for 15% of total, the water consumption accounting for 15% of the total solid materials, after 28 d compressive strength, can meet standard required of iron tailings baking-free brick.