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一般抹面砂浆施工时容易发生什么

来源: 日期:2022-11-12 发布人:juyehe

济南抹面砂浆是应用于在建筑基础上涂抹平整或提供保护的砂浆的总称。根据操作不同,抹面砂浆分为现场搅拌砂浆和预拌干粉抹面砂浆两种。那一般抹面砂浆施工时容易发生的问题及原因有哪些呢?
Jinan plastering mortar is a general term for the mortar used to smooth or provide protection on the building foundation. According to different operations, the plastering mortar is divided into two types: on-site mixed mortar and premixed dry powder plastering mortar. What are the problems and reasons that are easy to occur during the construction of general plastering mortar?
一、基墙不平坦,未进行找平处理,造成抹灰层有裂缝、空鼓。
1、 The foundation wall is not flat and has not been leveled, resulting in cracks and hollows in the plastering layer.
同一涂抹过程中,砂浆层厚度不均,因厚处干燥慢,薄处干燥快;涂抹后,砂浆层发生硬化和收缩,干处干燥快,而干处干燥早,而干处干燥慢,则在砂浆层内产生内应力;涂抹后,砂浆层厚度偏差较大,变形不一致,则会造成结构破坏鼓或鼓。
In the same coating process, the thickness of the mortar layer is uneven, because the thick part dries slowly, and the thin part dries quickly; After coating, the mortar layer will harden and shrink, and the dry part will dry quickly, while the dry part will dry early, and the dry part will dry slowly, which will generate internal stress in the mortar layer; After coating, the thickness deviation of mortar layer is large and the deformation is inconsistent, which will cause structural damage or bulge.
部分厚度大于等于或小于等于门窗洞口边缘或墙角处厚度变化梯度较大时,易产生局部收缩裂纹;部分厚度大于等于或小于等于局部厚度时,砂浆层与基材的粘结强度较弱,常与基层发生拉脱,产生空鼓现象。所以,在基面不平坦的情况下,应先找平基面,待5-7天后降温后再施工抹灰。
When the partial thickness is greater than or equal to the edge of the door and window opening or the wall corner has a large gradient of thickness change, it is easy to produce local shrinkage cracks; When the partial thickness is equal to or less than the partial thickness, the bonding strength between the mortar layer and the base material is weak, and it often pulls off from the base course, resulting in hollowing. Therefore, if the base surface is uneven, the base surface shall be leveled first, and the plastering shall be carried out after 5-7 days of cooling.
济南抹面砂浆
二、由于抹灰层下坠而引起的事故。
2、 Accidents caused by falling plaster layer.
若长期处于不稠化状态,其抹灰层失去流动性,在自身重力的作用下,可能会下坠滑移,从而导致其发生抹灰层脱落。其主要表现为抹灰层吸水性小,一次抹灰厚度过厚,或在抹灰后没有被雨水淋湿过,这类现象在冬季低温下易发生。
If it is in a non thickening state for a long time, the plaster layer will lose its fluidity, and may fall and slip under the action of its own gravity, which will cause the plaster layer to fall off. It is mainly shown that the water absorption of the plastering layer is small, the thickness of a plastering is too thick, or the plastering layer has not been wetted by rain after plastering, which is easy to occur under low temperature in winter.
为防止此种情况发生,首先应严格按照施工技术规程要求,一次抹灰须不能过厚,多层抹灰时每层抹灰间隔足够长,抹灰基表面在淋水潮湿的情况下不能抹灰,适当降低用水量,防止抹灰后遭受雨淋,冬季低温时抹灰后应加强通风。
In order to prevent such a situation, first of all, the requirements of the construction technical specifications should be strictly followed. The one-time plastering must not be too thick. When plastering multiple layers, the interval between each layer of plastering should be long enough. The plastering base surface cannot be plastered when it is wet. The water consumption should be appropriately reduced to prevent rain after plastering. The ventilation should be strengthened after plastering in winter when the temperature is low.
三、粉刷基材吸水率的差异造成砂浆抹灰层开裂。
3、 The difference in the water absorption of the plastering substrate causes cracks in the mortar plastering layer.
灰浆抹灰层由于抹灰基体材料的吸水率不同,导致抹灰层的稠化和硬化速度不同,抹灰层的粘结处易出现裂纹。如砖墙与混凝土梁柱连接处,由于混凝土吸水能力远低于泥页岩砖或加气混凝土砌块,常常会出现开裂现象。为防止这种现象发生,施工处理措施主要是在不同基材接合处,搭接铺一层钢丝网或玻纤网,先涂一层薄砂浆,再进行砂浆抹灰施工。
Due to the different water absorption of the plaster base material, the thickening and hardening speed of the plaster layer is different, and cracks are easy to appear at the bonding part of the plaster layer. For example, at the joint of brick wall and concrete beam column, because the water absorption capacity of concrete is far lower than that of shale brick or aerated concrete block, cracking often occurs. In order to prevent this phenomenon, the construction treatment measures are mainly to lay a layer of steel wire mesh or glass fiber mesh at the joint of different base materials, apply a layer of thin mortar first, and then carry out mortar plastering construction.
以上就是今天的全部内容,相信大家对抹灰砂浆施工时容易发生的问题及原因也有了一定的认识。非常感谢您的耐心阅读。如还想了解更多关于抹灰砂浆的相关问题,您可以关注我们的网站
That's all for today. I believe you have a certain understanding of the problems and causes that are easy to occur during the plastering mortar construction. Thank you very much for your patience. If you want to know more about plastering mortar, you can follow our website !