论文部分内容阅读
本文采用X射线衍射、差热分析、扫描电子显微镜和重液分离等方法,对以工业废渣(粉煤灰、自燃煤歼石、沸腾炉渣、炉渣)为主要原料,掺石灰、石膏的硅酸盐制品,在100℃蒸养和175℃蒸压条件下的水化产物作了鉴定,发现在所有上述制品中,在蒸压条件下形成的水化硅酸钙是结晶较好的托勃莫来石和结晶较差的CSH(B)同时存在的连续相;在蒸养条种下形成CSH(B)。但不论蒸压或蒸养,Al都进入水化硅酸钙的结构中,形成含Al的水化硅酸钙。水化产物的相组成,不仅与反应的温度有很大关系,而且因石灰掺量的不同而有明显差别。在一定范围内提高石灰掺量,对形成托勃莫来石(包括含Al的托勃莫来石)和水石榴石有利。水化硫铝酸钙(包括高硫型和低硫型)只在100℃蒸养条件下存在。
In this paper, X-ray diffraction, differential thermal analysis, scanning electron microscopy, and heavy liquid separation are used to treat industrial waste (fly ash, self-ignited coal gangue, boiling slag, slag) as the main raw material, lime and gypsum The product of the acid salt, hydrated at 100°C and 175°C autoclaved, was identified. It was found that in all of the above products, the calcium silicate hydrate formed under autoclave conditions is a better crystalline The continuous phase of simultaneous presence of mullite and poorly crystalline CSH (B); CSH (B) forms under the steaming strip species. However, regardless of autoclaving or steaming, Al enters into the structure of calcium silicate hydrate, forming Al-containing hydration calcium silicate. The phase composition of the hydration product not only has a great relationship with the temperature of the reaction, but also has a significant difference due to the different lime content. Increasing the lime content within a certain range is beneficial to the formation of tobalite (including Al-containing talcumite) and water garnets. Hydrated calcium sulfoaluminate (including high-sulfur and low-sulfur types) existed only at 100°C.