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August 12, 2017 18:08

Plasters - important tips for perfect result

Cooking plaster

This article will explain how to make plaster, using all known materials, ie sand, cement, clay and lime.

Important!Any mixture includes in its membership fillers, binders and a liquid.

most popular binders used in the solutions is clay, cement and lime.As the filler used is usually sand, and the liquid - is ordinary water.As a rule, the final material contains one binder and one filler, but it is used and two binders.This is possible with the addition of lime-sand mixture of cement.

Depending on the proportion of its plaster solution is divided into three types:

  • fat: contains an overabundance of the binder.After such a composition is dry, it cracks;
  • normal: the correct ratio of filler and binder.
  • skinny: contains a surplus of aggregate.The solution is unstable, fragile and short-lived.

How do you know whether divorced plaster right?

To understand what has turned the solution (skinny, fat or normal), you need to drop in and see him trowel:

  • solution sticks to the trowel pieces - hence, the composition of the fat;
  • trowel lightly soiled - so thin plaster;
  • composition sticks to the trowel is not much, creating a thin crust - so normal.

The composition of the plaster is usually included sand and cement, that is the most popular plaster, prepared in the home, it is a cement-sand.Brand cement ratio affects the sand.When using M-400 cement recommended ratio should be 1: 3, i.e. to 1 part cement, 3 parts sand m.

composition must first mix dry, then slowly pouring the water, stirring until until the solution acquires the necessary consistency.When the mixture is ready, add it to the construction glue PVA, at a ratio of 50-70 g per 10 liters of adhesive plaster.

lime and clay mortar

plaster based on lime is prepared using a paste of sand and lime.The ratio of sand to the paste depends on the fat content of lime.In this case, no one can figure out how to make plaster "normal."But there is one rule that can help: in the process of preparing such a composition, it is necessary to control oiliness, gradually adding to it the sand.

If we add 1 kg of cement per 10 kg of mortar, then its strength is increased by several times.clay-based plaster is prepared according to the same technology, as well as lime.The proportions in this composition also depend on the fat content of the solution.In this, too, can be added to the plaster cement.

Important!If the plaster is necessary to carry out external works, it is best to make an ordinary cement-sand composition.

Preparation of plaster, its composition and proportions depend on what the surface is supposed to apply it.Each type of plaster has its own characteristics and scope.Some can be used for both internal and for external works, and some, for example, only indoors.

not possible to use one solution to cover all surfaces, which is why the right choice depends on how long an plaster.