摘要
以钼尾矿、矿渣、熟料和石膏为原料制备胶凝材料,探讨了钼尾矿粉的火山灰反应活性和胶凝材料的水化反应活性,并通过化学结合水和SEM对水化产物进行了研究。结果表明,当钼尾矿粉在胶凝材料中掺量为40%,胶凝材料的初凝时间和终凝时间分别为195 min和290 min,胶砂试块28 d抗压强度可以达到55.9 MPa。利用钼尾矿制备的胶凝材料的水化产物以钙矾石和C-S-H凝胶为主,二者的相互交织促进了胶砂试块强度的增长。
Taking molybdenum tailings, slag, clinker and desulfurization gypsum as raw materials for cementitious materials, the ash reactivity of molybdenum tailings and the hydration reactivity of cementitious materials were studied. Meanwhile, the hydration products of cementitious materials were analyzed with chemical combined water and SEM. The results showed that, when mass ratio of molybdenum tailings in cementitious materials was 40% , the initial setting time and the final setting time were 195 min and 290 min respectively. The compressive strength of molybdenum tailings mortar at 28 d could reach 55. 9 MPa. The hydration products of cementitious materials prepared with molybdenum tailings were mainly ettringite and C - S - H gel. And the intertwined ettringite and C - S - H gel improved the strength of concrete block.
出处
《矿产保护与利用》
北大核心
2017年第2期90-95,共6页
Conservation and Utilization of Mineral Resources
基金
陕西省科技统筹创新工程项目(2012KTDZ02-02-01)
国家级大学生创新创业训练计划项目(201511396707)
商洛市科技计划项目(SK2014-01-03)
关键词
钼尾矿
胶凝材料
火山灰反应活性
水化产物
molybdenum tailings
cementitious materials
ash reactivity
hydration products
