Build Daily

Building Materials

August 12, 2017 18:08

A solution of cement and sand - we master cooking techniques

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What is a cement-sand mortar?

main binder component in the majority of mortar is cement.This material is truly universal.Mixtures based on it have a high level of ductility and strength, so it is less popular in construction.The solution is based on cement used for the construction of brick walls, plaster interior and exterior surfaces, concrete production and pouring floors.

Its members except cement include various small fillers such as sand or fine gravel.In some cases, such a mixture is made by special additives.The quality of components and production technology depends on how the solution will meet certain requirements.Violate instructions, over which the cement-sand mortar for plastering, it is not recommended, as this may lead to the destruction of building structures.

How is the preparation of cement-sand mortar?

cement-sand mortar, the composition of which is strictly regulated, is very popular in the construction industry, since almost never used in the manufacture of various concrete constructions cement in its purest form.How does the preparation of cement-sand mortar, and what is needed?

First, dry ingredients are mixed.Further, the mixture water is added in small portions.It required volume is determined empirically.Typically, the solution should resemble the consistency of thick cream.After mixing it is allowed to stand for 15 minutes and then stirred again.

Due to the fact that the mortar hardens quickly enough not to be immediately prepare large amounts of the mixture.This is especially true of plastering work, where the plasticity of the mass of workers is crucial.To finish surfaces prepared in a mixture ratio of 1: 5: 2, where a third component - a milk of lime.

To prepare small volumes of mixing of the components can be carried out using a mixer or an electric drill with a special nozzle.Mix thoroughly necessary to avoid lumps remained. Use the solution immediately after preparation is necessary, for no more than half an hour , as after expiry of that period in the mixture starts to happen hardening of fine particles, which is no longer possible to be diluted with water.

Hardening and consumption of cement-sand mortar

Particular attention should be paid to purchase cement terms of its use, since it affects not only the rate but also the strength of a monolithic casting or bricklaying.Experts strongly recommend to prepare solutions use only high-quality materials, for which the period has not yet expired use.

hardening cement-sand mortar is the result of interaction between the cement grains with water, during which the gel is formed, which subsequently hardens.Keep in mind, that with decreasing temperature slows down during this process, and after the thermometer falls below 0 ° - is almost completely stopped.

Regarding the number of consumable materials per unit area, then, for example, plaster wall plays an important role quality surface from which primarily depends on the thickness and the finishing layer.For example it is possible to calculate the consumption of cement-sand mortar, based on the following values:

if a solution prepared in a ratio of 1: 3, the cement consumption will be 0,005 m3 and the sand - 0,015 m3.Consequently - for the application of the plaster on one square meter area will need 0.02 m3 cement-sand mortar.

should be noted that the calculations are only very average values, because much depends not only on the quality of materials, but also on the qualifications of plasterers.

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