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济南抹面砂浆质量选择的标准是什么?

来源:https://www.jnfhjc.com 日期:2020-07-24 发布人:juyehe

抹面砂浆是一种功能材料而不是结构材料,其作用初找平墙面外,主要起保护墙体的作用。抹面砂浆的质量终反映在其工程质量上,目前抹灰砂浆存在的主要问题是开裂、空鼓、脱落,这其中的一个主要原因是砂浆的粘结强度低,因此粘结强度对抹灰砂浆来说是一个重要指标。

Plastering mortar is a kind of functional material rather than structural material. Its function is to level the wall surface and protect the wall. The quality of plastering mortar is reflected in its engineering quality. At present, the main problems of plastering mortar are cracking, hollowing and falling off. One of the main reasons is that the bonding strength of mortar is low, so the bonding strength is an important index for plastering mortar.
抹面砂浆除要求具有良好的和易性,容易抹成均匀平整的薄层,便于施工;还要求具有较高的粘结力,砂浆层要能与基底粘结牢固,长期使用不致开裂或脱落。好的抹灰砂浆对建筑物和墙体可起保护作用,它可以抵抗风、雨、雪等自然环境对建筑物的侵蚀,并提高建筑物的耐久性。经过砂浆抹面的墙面或其他构件的表面又可以达到平整、光洁和美观的效果。
In addition to good workability, the plastering mortar is easy to be plastered into a uniform and flat thin layer, which is convenient for construction; it is also required to have a high cohesive force, and the mortar layer should be able to bond firmly with the base, and it will not crack or fall off after long-term use. Good plastering mortar can protect buildings and walls. It can resist the erosion of natural environment such as wind, rain and snow, and improve the durability of buildings. The surface of the wall or other components plastered with mortar can achieve smooth, smooth and beautiful effect.
抹面砂浆的稠度可根据基层材料决定。选用普通抹灰砂浆,应同时考虑其可操作性,包括砂浆的保水性、黏聚性和触变性,以及初期抗裂性、粘结强度、抗压强度和后期抗裂性等多重指标,不能只偏重某一指标而影响砂浆其他性能。
The consistency of plastering mortar can be determined according to the base material. When selecting common plastering mortar, its operability should be considered at the same time, including water retention, cohesiveness and thixotropy of mortar, and multiple indexes such as initial crack resistance, bond strength, compressive strength and later crack resistance. It is not allowed to focus on one index and affect other properties of mortar.
抹面砂浆的使用应根据建筑物的立面尺寸精度和墙体结构形式决定。例如,砖结构墙体因为块体之间灰缝多,块体尺寸偏差大,一般就采用普通抹灰砂浆;钢筋混凝土结构,如果模板尺寸精度偏差大或混凝土墙板与梁断面尺寸不一致,那么也必须作普通抹灰;如果钢筋混凝土结构基层尺寸精度偏差小,那么就可采用薄层砂浆抹灰。
The use of plastering mortar should be determined according to the vertical dimension accuracy of the building and the structural form of the wall. For example, for brick structure wall, because there are many mortar joints between blocks and the block size deviation is large, ordinary plastering mortar is generally used; for reinforced concrete structure, if the accuracy deviation of formwork size is large or the size of concrete wall panel and beam section is inconsistent, then ordinary plastering must be carried out; if the dimensional accuracy deviation of reinforced concrete structure base is small, thin-layer mortar plastering can be used.