Button masonry took the average position between the lamp masonry and the concrete. Its strength primarily depends on the strength of the concrete that is part of it. See more interesting things on Ирис казино официальный сайт.
The use of a bottle -to -concrete masonry can be especially justified in those regions where the cost of brick is quite high, and good lumber for the construction of timber houses is absent. At the same time, you can get real savings in funds in the construction of foundations and wall structures.
Building bottle masonry with a freezing method, then its strength after thawing will decrease to zero. Based on this, the freezing of a botinum is permissible only after reaching 50% of the strength from the project necessary, but not less than 50 kg/cm2.
The execution of a bottle -to -concrete masonry directly under winter conditions, as a rule, should be performed in such ways that there is a concrete accumulation of the required strength level before freezing.
For these purposes, a widespread method of thermos is used, which is based on the maintenance of heat in laying the laid out warmed materials and heat, which is released by concrete during hardening of cement. In addition, this method is widely used to perform concrete work with large volumes. In winter, steam -heating and electric heating of botobon is also used in winter.
Using the method of thermos before laying, the lamp stone is fully warmed up, and the concrete mixture prepared on the heated crushed stone or sand is covered immediately after laying the resulting heat.
When laying, the concrete mixture should be with temperature indicators corresponding to calculations, so that during the period of cooling of the material in the formwork with insulation, a given level of strength is reached. To accelerate concrete hardening, the chemical composition additives are introduced, which significantly reduce the temperature of freezing of the concrete mixture in turn, which make it possible to use the intelligent bottle stone without the required heating.
Using electric heating or steam -heating, each stone should be cleaned of snow or ice, then lay it, without first warming it up. In addition, under no circumstances, the temperature of the concrete mixture can be reduced below 5 ° C.
It is also necessary to note the fact that the masonry steam heater is performed by supplying steam to the inter -falling space, and electric heating – by connecting concrete network voltage. In this case, heating is carried out with sewing electrodes with their group connection.
It is necessary to completely exclude the possible freezing of the concrete mixture at the junction with the base. At the junction of the layer of old masonry and concrete mixture, the depth of heating should be approximately 30 cm. and protected from freezing to obtaining the strength of the laid concrete.
The current control of the qualitative indicators of concrete when performing foundations from concrete under winter conditions, as a rule, should be carried out in compliance with the instructions regarding mobility and dosage of knitting material and aggregates, as well as carrying out: carrying out:
• observations of the temperature of the concrete mixture during styling in the case;
• observations of the temperature mode of concrete hardening. The masonry provides for special nests; to measure the temperature by thermometer;
• Performing the strength of the strength of samples for concrete control.
The use of a bottle -to -concrete masonry can be especially justified in those regions where the cost of brick is quite high, and good lumber for the construction of timber houses is absent. At the same time, you can get real savings in funds in the construction of foundations and wall structures.