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Concrete solutions

Concrete solutionsConcrete is a mixture of cement, aggregate and water of different sizes.

 

As of Kyzylkumcement produce the following types of concrete solution: M200, BSG-15 P1 F-150 W-4.

 

Sand, gravel, concrete used must be clean, since dirt reduce its strength. If necessary materials are well washed. Cement used that brand, which allows you to get the desired concrete strength. Water should also be clean. The concrete mass may be different consistencies - density. Hard (like wet earth) when laying requires a strong seal, plastic (relatively thick and more mobile) needs less compaction; cast - a movable mass, gravity is almost fill the form.

 

Consistency of the concrete mass is dependent on the amount of water in excess of which it is stratified, and the concrete strength is reduced. If at the same time to add water and cement, without changing the relations between them, the strength of the concrete remains unchanged. The thicker the mass and the stronger it is compacted (compacted), the higher strength concrete, and vice versa. If the concrete mass to put the steel (iron) fittings, we get concrete - a more durable concrete.

 

It is advisable to prepare and lay a thick mass slump with 2-6 cm, however, lay and well sealed it is possible only in large structures with widely spaced reinforcement. The thinner design and the more often it is fitting, the concrete should be pliable mass. Standards provide the following consistency of the concrete mass to slump in centimeters: preparation for foundations and floors - 2-3 cm thick structure without reinforcement (foundations, walls) or with widely spaced reinforcement - 6.3 cm; conventional reinforced concrete structures (beams, columns and plates) with the reinforcement of medium thickness - 8-12 cm, thin walls, columns and beams of small cross-sections, as well as designs with thick reinforcement - 12-14 cm

 

The consistency of the concrete mass is measured by special metal cone with a very smooth inner surface (no seams). Cone height - 30 cm, width at bottom base - 20, at the top - 10 cm Side cone has two handles at the bottom of it strengthens two stops in the form of tabs or staples, which we should stand down, holding the cone to the horizontal surface (wide board , plywood, sheet steel or plastic). To check the weight of the finished concrete, moisten the area with water, put on her cone, pressed down, fill it with three layers of 10 cm of concrete mass, each layer is pierced 25 times with a bayonet-pin round steel with a diameter of 15 mm. This seal is called shtykovaniem. Filling the cone, the excess concrete mass is cut flush with the edges. After that, the handles of the cone slowly raised vertically. Liberated from his concrete weight slowly subside, changing its shape. Once the concrete mass cease to settle, put it next to the cone, put it on the upper base of the rail and measure the distance from it to pellet the ruler with centimeter markings. Thinner than the consistency of the concrete mass, the more it accumulates, and vice versa.

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