Premixed mortar, cushion layer using same and preparation method of cushion layer: Fid-Bau Portal

Premixed mortar, cushion layer using same and preparation method of cushion layer

WANG OUGEN

The invention provides premixed mortar, a cushion layer using the premixed mortar and a preparation method of the cushion layer. The premixed mortar is prepared from the following components in parts by weight: 30-150 parts of Portland cement; 50 to 200 parts of blast furnace slag; 5-8 parts of polypropylene short fiber; the particle size of the blast furnace slag is 2-10 mm, and the water content is 0.5-1.5%. The porous structure function of the blast furnace slag is utilized, the density of the blast furnace slag is smaller than that of sand, and the blast furnace slag is used for replacing the sand to solve the problem that the load of a cushion layer on a floor plate structure is heavy. The lithium-based bentonite is adopted, the lithium-based bentonite has the advantages of being small in mixing amount, good in thickening effect and rapid in water retention rate improvement, the lithium-based bentonite can be evenly dispersed in the mortar, the overall stability of the mortar is very high after the lithium-based bentonite is hydrolyzed and hardened, and due to the fact that the lithium-based bentonite is evenly dispersed, the water retention rate of the mortar is increased. And micro holes and micro cracks in the mortar can be well filled, so that the mechanical strength of the mortar is improved.

本发明提供了一种预拌砂浆、利用其的垫层及该垫层的制备方法，该预拌砂浆由以下重量份数的组分制成：硅酸盐水泥30‑150份；高炉矿渣50‑200份；聚丙烯短纤维5‑8份；所述高炉矿渣的粒径为2‑10mm，含水率为0.5‑1.5％。本发明利用了高炉矿渣的多孔结构功能，它相对沙子的密度小，利用高炉矿渣替代沙子解决了垫层对楼层层板结构载荷较重的问题。本发明采用锂基膨润土，其锂基膨润土有掺量小、增稠效果好、保水率提高快优点，锂基膨润土可以在砂浆中均匀分散且水解硬化后使得砂浆整体的稳定性很高，而且由于均匀的分散，砂浆内部的微小孔洞和微细裂缝能得到很好的填补.进而提高砂浆的力学强度。

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