What does cement or vermiculite mortar refer to?
Laying method of cast-in-place cement vermiculite thermal insulation layer:1, the use of mechanical agitation, the expansion of vermiculite particles are very damaged, and sometimes can reach 50%, and easily with the mixing tube bonding, it is not appropriate to use. Using artificial mixing, the first water and cement quantitative uniform into cement slurry, cement slurry and then evenly pour in vermiculite quantitative with bucket, pour with mix, mixing evenly.2, roofing laying insulation layer, should take "sub warehouse" construction, each warehouse width of 700 ~ 900mm. It can be separated by wood board, or steel bar ruler can be used to control width and laying thickness.3, because of swelling vermiculite faster water absorption, construction, it is best to transport raw materials to the laying site, with mixing shop, to ensure the water cement ratio accurate and quality of the project.4, the heat insulation layer of the virtual thickness is generally 1.3 times the design thickness (not including leveling layer), after laying with wooden clapper (wood crab) beat solid, smooth to the design thickness. The bedding plane of the expanded vermiculite particles should be parallel with the laying plane as possible as possible.5, cement, vermiculite pulp compaction, smooth, should immediately wipe leveling layer, both without scoring two stages of construction. The mixing ratio of leveling mortar is 42.5 cement: coarse sand: fine sand, =1: 2: 1, and the consistency is 7 ~ 8cm (porridge shape).6, leveling layer after wiping, in general circumstances may not be sprinkler maintenance.7, the overall insulation layer should have a smooth surface. The smoothness of the use 2m straightedge check, the gap between the ruler and the surface of the insulation layer; when the insulating layer directly set the waterproof layer, should not be greater than 5mm; such as the leveling layer on the insulating layers, should not be greater than 7mm, the gap only allows smooth change.
The cast-in-place cement vermiculite thermal insulation layer is made of expanded vermiculite as aggregate, cement as cementing material, mixing in a certain proportion and mixing with water and sand. Has the characteristics of light weight, small thermal conductivity, high strength, easy expansion of fission, delamination, economic quantity etc.. When applied to the flat surface, it can reduce the load of the surface layer, save the water consumption, reduce the cost and shorten the construction period. The utility model can be used as a heat insulating layer for cast-in-place or heat insulation layer or the like.
