很多工地把抹面砂浆当成“水泥加沙子”随便拌，交房一两年，外墙细裂纹、窗边渗水、内墙空鼓陆续冒出来。济南夏雨冬冻、春秋多风，普通砂浆收缩大、柔性不够，基层一胀一缩就先从抹面层开裂。

Many construction sites mix plastering mortar as "cement with sand" and after one or two years of delivery, fine cracks on the exterior walls, water seepage at the window edges, and hollowing of the interior walls gradually emerge. Jinan is rainy in summer and frozen in winter, and windy in spring and autumn. Ordinary mortar shrinks greatly and lacks flexibility. When the base layer expands and contracts, it first cracks from the plaster layer.

选料先看用在哪：

Choose materials first and see where they are used:

外墙普通抹灰，M7.5或M10强度档，核心看抗渗和抗冻；

Ordinary plastering for exterior walls, with M7.5 or M10 strength grades, with a focus on impermeability and frost resistance;

外墙外保温体系，要用聚合物抹面砂浆，拉伸粘结强度0.6MPa以上、压折比控制在3.0以内，才能裹住保温板抗住风载；

The external wall insulation system requires the use of polymer coated mortar, with a tensile bonding strength of 0.6 MPa or above and a compression ratio controlled within 3.0, in order to wrap the insulation board and resist wind loads;

加气块、轻质隔墙，选高保水低收缩型，不然基层抢水，砂浆没水化完就粉了。

Aerated blocks and lightweight partition walls should be selected with high water retention and low shrinkage types, otherwise the base layer will compete for water and the mortar will become powdery before it fully hydrates.

现场容易省错钱的三处：

Three easy ways to save money on site:

基层不刷界面剂——混凝土和加气块吸水率差很多，不拉毛不封底，空鼓率直接翻倍；

The base layer is not coated with interface agent - the water absorption rate of concrete and aerated blocks is much different, without pulling or sealing the bottom, the hollowing rate directly doubles;

网格布压偏了——耐碱玻纤网要在第一道砂浆微干时压进去，搭接≥100mm，门窗洞口角部加铺加强网，别浮在表面也别贴着墙；

The grid cloth is pressed off center - the alkali resistant fiberglass mesh should be pressed in when the first mortar is slightly dry, with a overlap of ≥ 100mm. A reinforcing mesh should be added at the corners of the door and window openings, and should not float on the surface or stick to the wall;

养护偷懒——抹完24小时开始洒水保湿，至少养7天，掺粉煤灰的养14天，夏天遮阳防风、冬天5℃以下别硬施工。

Lazy maintenance - start watering and moisturizing after 24 hours of application, at least 7 days for curing. For those mixed with fly ash, cure for 14 days. Sunshade and windproof in summer, and avoid hard construction below 5 ℃ in winter.

小样别省：让厂家留一块原样封样，到货查结块、查生产日期、查检测报告里的耐水强度和冻融数据。同一栋楼用同一批次，避免色差和收缩率不一致。

Don't save on small samples: ask the manufacturer to keep an original sealed sample, check for clumps upon arrival, production date, water resistance strength, and freeze-thaw data in the test report. Use the same batch for the same building to avoid color differences and inconsistent shrinkage rates.

本文由济南抹面砂浆友情奉献.更多有关的知识请点击:https://www.jnfhjc.com我们将会对您提出的疑问进行详细的解答，欢迎你登录网站留言.

This article is a friendly contribution from Jinan plaster mortar For more information, please click: https://www.jnfhjc.com We will provide detailed answers to your questions. You are welcome to log in to our website and leave a message