使用麦秸、稻草做抹灰的拉结料时,要将这些草筋提前一周用石灰水浸泡软化。这是为什么呢?1.这些草筋在浸泡前比较硬,不好使用,当抹好的墙面干燥后,会给人以粗糙感。2.草筋含有大量的黄色素,当抹灰层干燥时,这种黄色素对墙面没有影响。如果抹灰层遇有渗漏或长期处于潮湿状态时,草筋中的黄色素会渗透到抹灰层的表面,形成一块块黄色斑点。 When wheat straw and rice straw are used for plastering, it is necessary to soften these straws by soaking in lime water one week in advance. Why is this? 1. These straws are harder and harder to use before soaking. When the plastered walls are dry, they give a rough feeling. 2. The grass bar contains a large amount of yellow pigment. When the plaster layer is dry, the yellow pigment has no effect on the wall surface. If the plaster layer is leaking or is in a long-term wet state, the yellow pigment in the grass veins will penetrate the surface of the plaster layer, forming a block of yellow spots.