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  • GRC线条基层处理的施工要点
  • 本站编辑:杭州欧罗建筑材料有限公司发布日期:2018-06-13 13:26 浏览次数:

GRC线条基层处理施工要点:

  根据我们使用的情况来看基层处理应抓好以下几点:

  1、基层表面应充分湿润,清除表面灰尘,掌握好配合比。凝结剂要求板面统刮,不得漏刮,厚度控制在2—3mm,并且必须拉毛,养护1d,才能开始面层粉刷。

  2、从上面我们了解到SN凝结剂主要性能是增加GRC线条的界面粘结性及在GRC线条表面形成封闭的面层延长砂浆的失水时间,但是它不能保证抹灰砂浆自身抗裂性能和抗剪切能力,并且现在大楼都使用中央空调,容易产生较大的温差。为了提高抹灰层砂浆的抗裂性能,在该工程内隔墙GRC线条抹灰底层时,同时压铺孔眼为6mm×6mm的中碱性玻璃纤维网布,此种玻璃纤维网布抗拉强度极高,在选择玻璃纤维布时,要确定合理的网布的孔径,如孔径过细容易产生隔层。在抹灰层砂浆压铺网布时要随抹底层灰同时压进,并要使网布全部被压出浆体所包裹,特别要注意2层玻璃网布交接处必须要使砂浆进入网孔内,否则反而形成空鼓。在SN表面必须抹底层灰,在底层灰达到7—8成干时,可抹中层灰,每层抹灰控制在7—9mm。

  3、抹灰时不宜采用刚性较强的水泥砂浆,选用1:1:6水泥混合砂浆可减少水泥的干缩。严格控制砂的粗细,杭州市场符合要求的中粗砂不多,故该工程采用加工砂50%,普通砂50%来控制装饰用砂的砂率。

  4、为确保成型的抹灰砂浆层在一定时间内维持在适度湿润状态,进行养护是十分必要的,抹灰层洒水养护应达到7d以上。

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GRC wall panel base treatment construction key points:

According to the situation we use, we should grasp the following points at the grass-roots level.

1, the grass-roots surface should be fully moist, remove surface dust, and master the mix ratio. The coagulant requires the scraper to be scraped on the surface, not to be scraped and scraped. The thickness is controlled at 2 to 3mm, and must be napped and 1D maintained before the surface layer can be painted.

2, from above, we know that the main performance of SN coagulant is to increase the interfacial bonding of GRC plate and to form a closed surface layer on the surface of GRC plate to prolong the water loss time of mortar, but it can not guarantee the cracking resistance and shearing ability of the plastering mortar. And now the building uses central air conditioning, which is easy to produce a larger temperature difference. In order to improve the cracking resistance of plastering layer mortar, when the GRC wall surface is plastered at the bottom wall of the project, a medium alkaline glass fiber mesh fabric with 6mm x 6mm is pressed at the same time. The tensile strength of this kind of glass fiber mesh cloth is very high. When selecting glass fiber cloth, the pore size of the mesh cloth should be determined, such as the pore size is too thin and the partition is easy to produce the barrier layer. . When the plastering layer mortar is pressed, it must be pressed with the bottom ash at the same time, and all the mesh cloth is wrapped up by the slurry. It is particularly important to pay attention to the entry of the 2 layers of glass mesh cloth to make the mortar into the mesh, otherwise the empty drum will be formed. On the surface of SN, the bottom ash must be applied. When the bottom ash reaches 7 - 8 dry, it can wipe the middle layer of ash, and the best control of each layer of plaster is 7 - 9mm.

3, when the plaster is not suitable for rigid cement mortar, 1:1:6 cement mixed mortar can reduce the shrinkage of cement. Strict control of the thickness of sand, Hangzhou market meets the requirements of medium coarse sand is not much, so the project uses processing sand 50%, common sand 50% to control the sand rate of decorative sand.

4. In order to ensure that the plastering mortar layer is maintained in a moderate and humid state for a certain time, it is necessary to maintain the plastering layer, and the maintenance of the plastering layer should be above 7d.