How to deal with the ash sand of concrete and how to deal with it?

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How to prevent the ground sand
l
strictly control the size of
ratio directly affect the strength of the mortar. The water ash ratio is too large, the ground strength is low, the surface is rough, wear-resistant, easy to sand;
l
use ordinary silicate cement as far as possible ordinary silicate cement and slag cement, volcanic ash cement, with better water preservation, small dry shrinkability, high early strength advantages, to ensure the quality of the ground and construction progress are very good. The use of ordinary silicate cement is to ensure the strength of cement mortar, to prevent the floor of the sand is necessary prerequisite.
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prohibit the use of expired cement and moisture-affected cement
cement storage period of more than three months is called expired cement. When expired cement is used on the surface layer, its strength, hardness and wear resistance are significantly reduced, resulting in sand starting. Moisture-affected cement is cement and water action coagulation into blocks, so the activity is greatly reduced, poor glue performance, compared with expired cement, the quality is worse, so it can not be used on the surface layer.
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surface mortar do not use fine sand
the ground to withstand all kinds of pressure, friction, impact, must have a certain strength and wear resistance. Coarse sand and medium sand are better than fine sand in terms of strength and wear resistance. The sand mixed with fine sand is large in dry shrinkage and easy to crack. Water preservation is also poor, not conducive to light pressure. Sand content should not be greater than
3%
, otherwise it will reduce the strength of the mortar, resulting in sand on the floor.
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master the press time
cement mortar should be paved with the actual, with wood wipe flat, iron wipe light. The press-light work should be controlled to be completed before the final condensation. Too early, the surface will float a layer of water, will inevitably affect the strength of the mortar, the pressure time is too late, will disturb or damage the cement gel structure, affecting the growth of mortar strength, the surface of the capillary hole is difficult to eliminate, but also lead to sand phenomenon.
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have enough maintenance time
the quality of maintenance on the ground quality is very important. The general maintenance time is greater than
7
days. Maintenance time is not enough, in the dry air, water continues to evaporate, will slow down or even stop hardening, surface mortar can not reach the design strength, sand is inevitable. Similarly, early use at low intensity will inevitably interrupt maintenance, affect strength growth, and damage to the surface layer.
construction
the cement floor,
the surface layer is thin and should be protected from freezing. Ensure that the temperature of the construction environment should
5
degrees Celsius or more. After the mortar is frozen, the volume expands, causing the clearance rate to become larger, forming loose particles, the surface strength will be greatly reduced, when the use of sand.
the treatment scheme for sandOf course, there are times when sand starts or happens, so what material can we use to repair sand concrete? The use of Fifans Gudybo concrete hardenerproblem of concrete ground sanding, the effect is very good. And the construction is simple, only need to be painted to achieve the desired effect.
the hardness of concrete, and completely solve the problem of concrete floor, garage sand. Liu
18627070888
1, use
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wear-resistant reinforcement: effectively improve ground wear resistance, prevent and root sand loose concrete, effectively improve the hardness and
density of concrete
;
, characteristics
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non-toxic, tasteless, green environmental protection, through the infiltration of concrete to produce chemical reactions, the formation of dense crystals. The construction is simple, only spray and brush can achieve the ideal wear, hardening, brightening effect;
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osmosis curing: effective penetration
1 to 30mm



, chemical reaction with the material in concrete
, forming a dense whole;
is understood to be based in California, USA, where the company is headquartered in

(KETCH), a company dedicated to researching, developing and producing high-performance flooring and providing engineering services. The Three Gorges Dam, the world's largest single building, uses the Fifans floor. In the history of many years of development, Fivans has been playing the role of a leader and innovator, in
in 2008
responsible for the preparation of the national standard of the flooring "floor coating materials"
GB /T22374-2008
, the company is currently moving to a blank city, interested in the company can understand.。