珠海市威科建筑
砌筑砂浆
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什么是砌筑砂浆？
用于砌筑砖、石等各种砌块的砂浆称为砌筑砂浆。砌筑砂浆用来粘结各种砖：具有低吸水性的红黏土砖、具有强吸水性的灰砂砖和加气轻质混凝土，起着构筑砌体、传递荷载的作用，是砌体的重要组成部分。
砌筑砂浆具有下列优点：
（1）具有优异的施工和易性和粘结能力。提高施工工作性，使砌体竖向砌筑灰缝抹浆、挂浆均匀，灰缝浆料饱满，并同时增加砂浆与砖体接触面积，保证砌筑砖体稳定性。
（2）具有优异的保水性，使砂浆在更佳条件下胶凝得更为密实，并可在干燥砌块基面都能保证砂浆有效粘结。砂浆能在更佳条件下胶凝，使砌块与砌块之间形成耐久、稳定和牢固的整体结构。亦可用薄浆法砌筑墙体，令墙体同质性更佳，使墙体应力分散均匀，从而大幅度提高墙体整体性和稳定性。
（3）具有塑性收缩、干缩率低特性，最大限度保证墙体尺寸稳定性。
（4）胶凝后具有刚中带韧的力学性能。提高墙体抗裂、抗渗及抗应变能力，达到墙体免受水的侵蚀和破坏的目的。
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砂浆的强度等级共有M5、M7.5、M10、M15、M20、M25等六个等级。一般情况下，干粉砌筑砂浆宜采用M10以上的砂浆。
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