Why the Cement Render Repairs Take Place? We Answer

By mixing all the ingredients with water, a process called hydrolysis takes place. In contact with water, the cement turns into a binder paste covering the surface of the aggregates, linking them together. At the end, the paste hardens and becomes a solid mass, known as concrete.

In order to obtain a good quality concrete it is necessary to check the quality of the used materials, especially the aggregates, by supplying them from a certified, reliable source.

The selection of a type of cement is made according to the resistance to initial compression "R" (2 days), the ultimate compressive strength and the property of the latter to ensure the durability of the respective construction according to the norms in force.

Aggregate materials

Aggregates that are used in the concrete composition may be sand or gravel granules. They have a weight ratio of 80% of the concrete mass and are a necessary ingredient for its strength.

Here's how to check if the aggregate type is right:

Sand - it must be harsh and harsh when you rub it between your fingers. It does not have to contain clay, that is to say, it does not have the earthly effect and it is easy to drain through the fingers. Also, it should not contain glittering flat grains, humus, petroleum residues or vegetable debris. Specifically, it should not leave dirt when you rub it between your fingers, but it must drain easily. The sand used must not be extracted from the seaside because it contains salts that can affect the durability of the concrete. You can ask Cement Render Repairs professional regarding the exact measurement.

Gravel - the granules must be rounded, not flattened, without imperfections on their surface. When you hit them with the hammer, gravel granules should break easily. Also, you should not be covered with clay and other impurities like dust, vegetal debris or charcoal.

Ballast - is a mixture of gravel and sand and must meet the criteria outlined above

The aggregates used to prepare the concrete must be supplied from a certified source, with away clay as well as other debris that could adversely affect the concrete reinforcement.

Additives

Additives are chemical substances (solid or liquid) which are added to the concrete composition in order to improve their properties before and after casting as follows:

Improve mixing properties so you can work more easily

Waterproofing of concrete

Reducing the curing time in different climatic conditions (cold or heat)

Reducing the demand for water in the mix

The use of the appropriate additive, dosed after the manufacturer's prescription, ensures the durability of the cast concrete in conditions where the water in the concrete composition is dosed to a minimum.

The water

The water used to prepare the concrete must be properly dosed and is closely related to the amount of cement used. This initiates the chemical reactions that lead to the hardening of the concrete, and the use of too much water can lead to a decrease in the strength and the quality of the concrete. The water must be clear and free of impurities, from a source of drinking water. Follow us on: Pinterest

All these are something very tricky and many things are there that needs special attention and monitoring, So, its better that you contact with Cement Rendering Services and take advices from professionals.