4.5.1. Introduction to technology.
The cement mortar survives twice and is easy to cause common quality problems such as sanding, hemp surface, hollowing, and dry cracking on the cement mortar ground. In order to basically control this common quality problem, the construction method of dry hard cement mortar is adopted to survive at one time, which not only improves the work efficiency, but also ensures the quality.
4.5.2 technical points.
Before construction, remove all debris on the cushion, keep the convex and concave degree not greater than lomm, and sprinkle water to wet the base layer 1-2d before construction.
Timely dough pressing and sprinkling maintenance are important links to ensure that the ground is not sandy, peeling, and hemp. After the first calendering, when the ground begins to condense, and people step on it and have footprints but do not sink, the second calendering is carried out, and it is required not to leak, and the dead pit sand hole is flattenedWhen there are a few footprints on it, and the trowel does not leave a trowel on it, it can be calendered for the third time. The third calender is the last. Use a little more force to flatten, compact, and calender all the wipes. After the third calendering 24 48h, start to spread sawdust or straw curtain for sprinkling curing, and the curing time shall not be less than 7d (the curing time of slag Portland cement shall not be less than LOD).