Bricklaying mortar and preparation method thereof

The invention relates to bricklaying mortar and a preparation method thereof, and relates to the field of dry-mixed mortar, the bricklaying mortar comprises the following raw materials by weight: 50-120 parts of cement, 600-850 parts of sand, 80-130 parts of an admixture and 10-25 parts of an additive; wherein the additive comprises hydroxypropyl methyl cellulose ether, sodium alpha-olefin sulfonate and an auxiliary agent, the content of the hydroxypropyl methyl cellulose ether is 0.1-0.4 part by weight, and the total content of the sodium alpha-olefin sulfonate and the auxiliary agent is 0-8%of the content of the hydroxypropyl methyl cellulose ether. Therefore, cracking of the mortar is reduced while the cohesiveness and the strength of the mortar are improved. 本申请涉及一种砌砖砂浆及其制备方法，其涉及干粉砂浆领域，本申请中的砂浆原料按重量份包括以下组分：水泥50-120份，砂600-850份，掺合料80-130份，添加剂10-25份；所述添加剂包括羟丙基甲基纤维素醚、α-烯基磺酸钠和辅助剂，所述羟丙基甲基纤维素醚含量按重量份为0.1-0.4份，所述α-烯基磺酸钠和辅助剂的总含量为羟丙基甲基纤维素醚含量的0-8%。从而本申请在提高砂浆粘结性和强度的同时，减少砂浆的开裂。