成型压力对电解锰渣免烧砖性能的影响

Effect of Molding Pressure on Properties of Unburned Bricks from Electrolytic Manganese Slag

以电解锰渣为主要原料制备电解锰渣免烧砖,研究了成型压力对电解锰渣免烧砖抗压、抗折强度,体积密度和线收缩率,吸水率和饱和系数及泛霜的影响,并对其进行XRD分析。结果表明:在水泥比为16.7%,骨料比为28%,含水率为32%的条件下,当成型压力为20 MPa时,电解锰渣免烧砖的28 d抗压、抗折强度分别为17.88 MPa和3.3 MPa,体积密度为1.53 g/cm3,线收缩率为0.75%,吸水率为21.9%,饱和系数为1.15,无泛霜现象产生,强度满足国标MU15免烧砖要求,其他性能指标均符合国标免烧砖一等品要求。

The effects of molding pressure on compressive strength, flexural strength, volume density and linear shrinkage, water absorption and saturation coefficient, as well as frosting of the unburned brick made of electrolytic manganese slag were studied by XRD. The results showed that under the conditions of 16.7% cement ratio, 28% aggregate ratio and 32% moisture content, the compressive and flexural strengths of 28 d was 17.88 MPa and 3.3 MPa, respectively, the volume density was 1.53 g/cm3, linear shrinkage rate was 0.75%, water absorption rate was 21.9%, saturation coefficient was 1.15, and no frost phenomenon occured. Strength met the national MU15 standard for unburned bricks, and other performance indicators met the national first-class requirements for unburned bricks.