China pneumatic concrete grouting pump
Concrete is collectively referred to as engineering composite materials that are made from cementitious materials that bond together the aggregate.
The term concrete is usually used to refer to the use of cement for cementitious materials, sand, stone aggregate.
And water,which can contain additives and admixtures,according to a certain percentage, by mixing the resulting cement concrete.
Also known as ordinary concrete, it is widely used in civil engineering.
Inorganic cementitious materials, such as cement, lime, gypsum and the like, are mixed with water to make the concrete mixture plastic, and then to be hardened by chemical and physical chemical action to produce strength.
In general, drinking water can meet the requirements of concrete mixing water.
Excessive acids, alkalis, salts and organic matter in the water can have detrimental effects on the concrete.
Aggregates not only have a filling effect, but also have an important influence on the concrete's bulk density, strength and deformation properties.
To improve certain properties of concrete, admixtures may be added.
As admixture has obvious technical and economic effects, it is increasingly becoming an indispensable component of concrete.
To improve the workability of concrete admixtures or the properties of hardened concrete, the cement is saved and finely ground mineral materials, such as admixtures, can be incorporated in the concrete.
It is divided into two types of activity and inactivity.
Admixture of the nature and quantity of concrete strength, deformation, heat of hydration, impermeability and color.
Grouting concrete to fill in the blanks in the form of a special liquid.Used for steel embedded in masonry walls, precast concrete part of the connection, to fill the gap, the sealed joints between the tiles.Filling is usually water, cement, sand, and the mixture usually shadow, sometimes fine gravel (if it is used to fill up a large space, such as core concrete block).With other structures, such as gypsum or joint composite paste, correct - applied mixed slurry form a waterproof seal.
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