Grout

Grout is a mixture of cementitious material and water, with or without aggregate, in which the water content is so high that the material has a fluid form.

Usually, no difference is made between grout and mortar, and their names are used interchangeably. On the other hand, grout and mortar are very different. Grout does not need aggregate, while mortar should have the right aggregate. Grout can flow quite well and has a fluid form, while Mortar does not. Grout is used to fill in the gaps, however mortar is used for gluing.

Mixing and preparing grout is usually simple, and if it is not required in large quantities, it is done on the project site. But if the amount of needed grout is high, the order will be given to the relevant factories and the grout will be provided there at a reasonable price.

There are different types of grouts, some of the most important of which are epoxy grout, cement or cement base grout, polymer grout and expanding grout.

The choice of grout used in each situation depends on the compatibility and coexistence of the grout with other available materials. Taking into account these conditions and different characteristics of each type, the desired grout is selected.

One of the most important advantages of grout is that it completely fills the place where it is poured.

Because expandable grout has non-shrinkage properties, ready-made grout is used for various purposes such as base plate, anchor bolts, installation of machine rails, bearing bridges, belts, rails, supports, etc.

Grouts are designed to be able to absorb the forces entering and transfer them to the sub-section. For example, when installing all kinds of machines, the forces coming from them are transferred to the concrete foundation by grout or mortar.

Concretes in which empty spaces have been created due to damage and cracking can be repaired using cement grout.

Of course, it should be noted that grout only fills the empty space and does not structurally repair the concrete. Therefore, grout is used when cracks and damage are not progressing or the cause of the damage has been identified and eliminated.

In addition to water, aggregate, and Portland cement, concrete lubricant additives may be used to increase grout flow. The ratio of water to cement in the grout mix is usually between 0.4 and 0.5, and this ratio is determined by the rate of cracking of the concrete. For example, in a typical cement grout, 20 liters of water are mixed with 50 kg of cement with 225 g of anti-shrink additives or lubricants.

The special property of grout (high fluidity), makes it easy to inject grout into different parts of concrete and fill its pores.