Advice 1: How to build a house out of concrete

Concrete is an artificial stone which is obtained by hardening a mixture of cement, gravel, sand and water. In monolithic construction from concrete it is possible to add various fillers to obtain a mass with the presence of frozen bubbles, which make the house warmer. When the device in the concrete reinforcement of the construction is reinforced concrete. A home built to last.
How to build a house out of concrete
You will need
  • -gravel
  • -sand
  • cement
  • -mixer
  • -prefabricated shuttering
  • -fittings
During the construction of the houseand of reinforced concreteas conventional construction of any material first pour the Foundation. It needs to be tape and high tensile strength, as concrete walls are heavy construction. Deepen the Foundation below the level of soil freezing, set the formwork and install reinforcement cage. Pour the Foundation above ground level by 50 centimetres.
Basement with monolithic structure is not set. Give time for typesetting the strength of the Foundation about 4 weeks. Install the formwork and begin pouring concrete walls.
If you want to make the walls higher strength, optionally install reinforcement cage. The formwork should be installed not higher than a man. Two days after pouring the first flight around the perimeter of the formwork can be disassembled and install the above. The most suitable modular designs that can be purchased at any hardware store. Can use and formwork made of planks yourself, but this process is very long and time consuming.
A mixture of sand, gravel, cement and water should be mixed in a concrete mixer and do such density that he could complete the reinforcing structure. Take only the sand river and is best to additionally sift through. The aggregate should be sharp-edged crushed, not river pebbles, which have smooth edges. It gives less grip, and the monolith turns out not so strong. The cement used is of high grade. Ratio: 1 part cement, 3 parts sand and 5 parts crushed stone. Pour water gradually so that the solution was thick sour cream.
After the construction of monolithic concrete houseand it immediately must be covered on the outer side of insulation materials. If this is not done, then the walls in the first winter condensation and your interior finish will be ruined.

Advice 2: How much time is needed for complete curing of the concrete

From the moment of pouring of concrete and until it is ready it will take some time. The amount of time required for this depends on the grade of concrete and nature of the work.
concrete forms freeze

Time strength

For filling the floor there will be no strength if do not water the concrete with water almost the whole period of solidification. The concrete ceases to gain strength, if dry and crack, so you need technology to close the screed concrete floor with polyethylene and an additional and watered if the weather is very hot.

Frozen in winter, the concrete strength also can not type, no matter how much time has passed. Therefore, in the winter work with concrete outdoors is not recommended. If after freezing the concrete to thaw or heat, the curing will occur, but the strength is lower than the original.
The process of curing concrete is nonlinear, and therefore, in the first week is the most intense. Further, the concrete is gaining strength not so fast.

At a temperature of 20°C and normal humidity of the concrete must harden for 20 days. At the same time in the same normal conditions over the first three days, the concrete is gaining no more than 30% of the total strength. For a set of 60-80% of grade strength is required 7-14 days with the same normal conditions. And only after 20-28 days may complete solidification to 100% compliance with the grade strength. After 90 days, if the conditions all this time had remained normal, the concrete attains 120% of the strength of the originally claimed.

The effect on the setting time of concrete

Despite the fact that the time of hardening of cement does not have a General answer for all works in which it is used, there are methods to speed up and slow down its freezing.

When large volumes of work hardening of concrete for the month can not happen, and so expect no special solutions had to be more than 3 months.
The formwork after casting the concrete must be removed within 12-24 hours. Otherwise, its removal may become problematic.

How much time will have to wait until complete curing depends on the nature of further work. Construction of a wooden fence may start after 3-4 days after installation and concreting of supports, and to erect a building on a Foundation in such a short time is not worth it.

Loading the Foundation of different designs should be not earlier than the 28th day after pouring, and only if the concrete has no cracks.

Advice 3: Why crushed stone in concrete

Rubble consisting of concrete is a major filler. This stone requirements, as it ensures the durability of concrete products. The best performance has crushed granite.
The presence of concrete rubble increases the strength of cement
Crushed stone is a by-product of processing rocks. There are several types of this stone, and they all have high strength characteristics.

Why in the concrete add gravel?

The strength of any stone is many times the strength of high quality concrete. Therefore, to improve resistance to weight and other loads in a cement-sand mortar added gravel. Such a concrete is called heavy. It lay rebar or other metal rods and manufactured concrete products: rings, building blocks, floor slabs, etc.

Crushed stone is a large aggregate, small is sand. From the strength of stone and type of cement used depends on grade of concrete. As the filler use the average fraction of gravel – 20/40 mm. It can be different strengths, depending on the type of rock, which are made. In some cases, the hardness of the stone can reach 1000 MPa or higher. This filler is used to manufacture concrete of the highest marks.

For laying in cement sand mortar suitable crushed Ferroalloy and blast furnace slag, copper and Nickel. It can be used to build the foundations and forming the building blocks. Before using gravel of this type shall be tested for the absence of radiation.

Another reason why the composition of concrete is crushed – a significant shrinkage of the cement during its solidification. The filler interferes with this process and not allow the cement to crack. In the construction work guided by the following rule: the greater the thickness of the concrete layer, the larger should be the fraction of filler. The amount of crushed stone or gravel the average shall be not less than 30% of the total volume of cement-sand mortar.

Has the meaning and form of crushed stone, laid in concrete. The closer to square, the more stones are placed in the solution. Therefore, he will be stronger. The cost of this material is slightly higher than conventional aggregates. When buying stones, pay attention to the percentage content of harmful impurities. There are rules that define allowable mineralogical composition of filler. According to them, the aggregates for concrete shall contain not more than 1.5% sulfites, 4% of pyrites, 1% coal, etc.

What is the rubble stronger?

The high strength concrete provides granite rubble. It has the best performance. But this stone one of the most expensive, so for laying in cement-sand mortar is used infrequently. Its more familiar use as a decorative element in landscape design.
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