大掺量煤矸石在干混砂浆中的应用研究

利用废弃的煤矸石研制节能、实用的建筑材料,是工业废渣资源化的一项重要途径。针对煅烧煤矸石具有火山灰活性的特性,研制了一种加工方便、和易性好、粘结强度高、抗折和抗压强度较好的大掺量煤矸石干混砂浆,并考察了不同煅烧温度、不同煤矸石掺量以及不同辅助成分(生石灰、石膏、塑化剂等)对砂浆性能的影响。结果表明,当煤矸石掺量为70%、水泥为16%、生石灰为10%、石膏为4%、塑化剂为0.01%时,所配制干混砂浆能很好满足建筑砂浆要求,还可以大大降低砂浆成本。

The Study on the Use of Large Volume Coal Gangue in the Dry-mixed Mortar

To develop building materials of energy-saving and practical,using discarded gangue as a raw material is a important way that can solve resourceful disposal problem of the industrial waste residues.Because of pozzolanic activity of calcined coal gangue,a kind of dry-mixed mortar incorporating of large volume coal gangue with be of easy operation,good workability,high bonding strength and high strength has been prepared.The effects of calcination temperature and addition percentage of coal gangue and different additive composition(lime,gypsum,plasticizer) on performance of dry-mixed mortar were studied in the article.Test results indicated that when the dosage of coal gangue is 70%,cement content 16%,lime content 10%,gypsum content 4%,plasticizer content 0.01%,the dry-mixed mortar can not only meet demands of building mortar,but also can greatly decrease the mortar cost.