For houses it is necessary to choose such basis which is capable to stabilize any motions of soil from foam concrete. It is important because of features of this material: hygroscopicities and tendencies to cracking.
Instruction
1. The main problem of houses from foam concrete block – high hygroscopicity of this material. If in the choice of the base not to consider this feature, the risk of deformation, cracking and destruction of blocks is high. Such constructions require the basis with qualitative waterproofing which sole is located below zone of the movement of soil. Performance of these conditions will allow to minimize risk of emergence of deep cracks in the house.
2. Feature of the bases for houses from penobetonadlya constructions from foam concrete block the "floating" bases will be optimal solution. Such bases are capable to absorb even considerable motions of the soil. As houses from that material have small weight, it is possible to stop on melkozaglublenny continuous footing. This most pre-fabricated basis which is not demanding essential material and other inputs. But it has to be obligatory "floating". That is, it is necessary to increase height of sandy "pillow" under tape sole from standard 15-20 cm to 40-50 cm.
3. Correct device of such dumping following: sand has to keep within layer-by-layer, with obligatory alignment by means of hydrolevel across. It is necessary to spill "pillow" water from hose and to carefully condense it with the vibrating plate, garden skating rink or any self-made devices. Special attention needs to be paid on the base waterproofing device. Before forming of sandy dumping in trench it is necessary to lay sheets of roofing material so that its cloths have been laid with an overlap. Seams are recommended to be missed the mark with bitumen.
4. After filling of tape, concrete needs to be protected from moisture influence: to process it bituminous mastics or to cover with water-repellent material. Well moisture-proof base will serve as reliable obstacle for moisture penetration to foam concrete. If in the territory of construction underground waters approach close the surface of the soil, it is desirable to lay drainage pipes on which the excess of water will be taken away out of borders of the site.
5. What base is better for houses from foam concrete on mobile soils? For puchinisty soil the column continuous footing will be optimal solution. Support should be established below soil freezing point. Under each of them there has to be sandy "pillow" of the corresponding thickness. The columns which are "tied up" by grillage represent steadier basis capable to minimize influence of forces of stretching and pushing out which arise during soil freezing. Thereby, optimal conditions for comfortable operation of the house from foam concrete blocks are created.