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August 12, 2017 18:08

Lime mortar - the subtleties of building "kitchen"

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mortar for masonry - how to do it correctly?

The composition of mortar includes hydrated lime and sand., and that it needs to brickwork was solid, it is necessary to know how to prepare a solution.For its preparation required to comply with certain conditions, and one of which is the right damping.It is carried out in a special tank where water is added in small portions.

But since ancestral times the best place to store lime considered fine wooden planks earthen pit, which is sprinkled with half-meter layer of soil.In this form for several years it has gradually gained the necessary properties.To master the preparation of mortar do not make the big work.Getting Started with straining through a sieve the milk of lime, which is added small weed out the sand.

mixture is thoroughly mixed and pour small portions of water.From its amount depends on the density of the solution.To complete instructions on how to make the mortar, it remains only to say that one part hydrated lime, experts recommend adding no more than 2-3 parts of sand.In order to increase the strength of the mix, it includes a small portion of cement or gypsum.

Lime plaster - What is special?

Then focus on the solution, which is used for plastering.Plaster - it is the most common way to finish walls and ceilings.Depending on the quality of the implementation is divided into simple and high-quality plaster, which differ in the size of the tolerance of irregularities.

plastering process consists of three stages.The first layer - scratch coat, the second - primer and third - finish coat.The total thickness of typically less than 25 mm.If you want to do more for the surface alignment layer, then as a reinforcing coating using a special plaster grid.Preparing lime plaster by mixing slaked bases and fillers, such as sand, slag and other materials available.

There plasters fat and skinny.The fatty mixtures present a significant percentage of binder, so that is their strong shrinkage and cracking.In lean solutions on the contrary - there is a shortage of lime, plaster or cement.They do not shrink, does not crack, but have a lower ductility and low toughness.

proportions of mortar for plastering

prepared mortar to meet the proportion of lime mortar.To reduce the setting time added thereto gypsum.The components are thoroughly mixed and then used for five minutes, because plaster hardens rapidly.To a mixture of plaster, which is prepared for the first layer (the rendering) in one portion was added a solution of lime plaster part and three parts water.For soil, the ratio is 1: 1.5: 2.Finish coat is made from a mixture of the lime and a half pieces of gypsum.

final hardening of the plaster occurs within 30 minutes.To slow down this process, add in plaster bone or hide glue.

density mortar depends on the quality of the filler.Mixtures of medium density (1500 kg / m3) prepared using river sand.Based on the porous filler (pumice tuff) solutions were prepared with low specific weight and low density.In order to lay a good plaster, walls and ceilings must be pre-prepared, cleaned of various impurities and moistened with water.

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