碱-矿渣-锰合金渣胶凝材料的研制

锰合金渣是生产锰系合金排放的工业废弃物,近年来锰矿资源的开采和利用发展迅速,产生的大量锰渣造成了严重的环境污染。将锰合金渣与矿渣复合,制备了碱-矿渣-锰合金渣胶凝材料,测试了所制备胶结材的抗压和抗折强度,利用扫描电镜分析了其微观结构。研究结果表明,随着锰渣掺量增加,碱-矿渣-锰渣胶凝材料的强度总体呈降低趋势;提高锰渣细度,所制备的胶凝材料强度亦随之增加;碱激发下磨细锰合金渣具有一定的水化硬化活性,其活性低于磨细矿渣。

Preparation of Cementitious Material Based onAlkali GGBS Manganese Alloy Slag System

Manganese alloy slag is an industrial waste produced from manufacture of manganese alloy. Recent years environment pollution of manganese slag has been becoming heavier and heavier with the development of manganese industry. Aiming to sort out this problem, combination of manganese slag and ground granulated blastfurnace slag (GGBS) were applied to prepare alkali activated cementitious material. Compressive strength and flexural strength of cementitious material prepared with combination of alkali slag manganese slag were measured. And micro structure of hydration production was investigated by scanning electro microscope (SEM). It was shown that the flexural and compressive strength of cementitious material with alkali GGBS manganese slag system were decreased with the increase of replacement of GGBS by manganese slag. The increase of the fineness of manganese slag was favorable for strength improvement of the alkali GGBS manganese slag material. It was concluded that ground manganese slag had hydraulic activity in alkali activated cementitious material and the activity was lower than that of GGBS.