摘要
本文利用栾川南泥湖钼尾矿、粉煤灰、炉渣为原料,以石灰、脱硫石膏为激发剂,通过正交设计研究生产承重蒸压砖的试验方法和工业试验。探寻出了影响钼尾矿-粉煤灰-炉渣承重蒸压砖强度的主要因素是成型压力,其次是水固比、骨料掺量、困料时间、钼尾矿与粉煤灰的质量比。XRD显示,钼尾矿-粉煤灰-炉渣经过蒸压产生了托勃莫莱石和方解石等水化产物,这些水化产物将未反应粗料粘结在一起,组成以粗颗粒为骨架的混凝土式结构,使得制品具有一定强度。对制品进行了性能测试表明:除具有较好的强度外,其冻融性、石灰爆裂、吸水率、耐碱、耐盐性能均良好,强度完全可以达到国家标准JC 239-2001《粉煤灰砖》规定的MU20级要求。经洛阳市金鉴工程质量检测中心检测,其各项性能均符合国家标准技术规定,放射性检验为A类建筑材料。
The experimental method and industrial test have been introduced in this thesis for the production of autoclaved bearing brick through orthogonal technique with molybdenum tailing, fly ash and slag in the Nanni Lake of Luanchuan County as the ingredients and lime and desulfurized gypsum as the activators. It has been found that the main factor affecting the strength of molybdenum tailing-fly ash, slag autoclaved bearing brick is the molding pressure, followed by the factors such as water-solid ratio, aggregate content, souring time and mass ratio between molybdenum tailing and fly ash. XRD indicates that the autoclave of molybdenum tailing-fly ash-slag generates hydration products such as tobermorite, calcite, gypsum, and C2SH, etc. which combine with the unreacted coarse ingredients to form the coarse particle frameworked structure similar to that of concrete so that the product will possess the strength. Property test of the product shows that it has excellent freeze-thaw resistance, lime burst resistance, water absorption, alkali resistance, salt tolerance, and the strength could well meet the Level MU20 regulated in National Standard JC 239-2001Fly Ash Brick. According to the tests carried out in Luoyang Jinxing Engineering Quality Test Center, its properties are all able to meet the national technology requirements and it is Class A building material through radioassay.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2011年第4期960-965,共6页
Bulletin of the Chinese Ceramic Society
关键词
钼尾矿
粉煤灰
炉渣
承重
蒸压砖
molybdenum tailings
fly ash
slag
bearing
autoclaved brick
