Warm plaster: Theory and Practice, photos

What kind of plaster called warm and why. Nuances preparation and use solution

Despite the appearance of a sufficient amount of gypsum analogs, cement mortar remains one of the most popular materials for interior and exterior. When the mass of the merits of the cement-sand plaster high thermal conductivity, based on a minimum number of air pores in the hardened mass. A variation called the warm plaster, has a lower thermal conductivity to resistance against cracking, therefore it is considered the best option for those who want to simultaneously align the wall, and warm. FORUMHOUSE portal users are actively using the plaster with low thermal conductivity and share their experiences with everyone.

Content:

• What kind of plaster called warm
• Which filler is usually added in a homemade warm plaster
• Preparation of the solution
• The use of warm plaster

What kind of plaster called warm

Typical mortar - cement binder and sand gives a coating density of about 1800 kg / mᶟ and thermal conductivity of about 1.2 W / (m * C). Warm plaster (TS) consists of a cement binder and filler, forming a monolith in the air pores, reduces the density and thermal conductivity. If the binder is commonly used cement, the filler - a large selection:

• Perlite - obsidian hydroxide formed on contact in a frozen lava earth with water. The resulting hydration of the nucleus resemble rounded pearls - pearls, for which the breed gets its name. It characterized by high porosity (up to 40%) and the ability to absorb liquid in quantities in excess of its own weight (400%). For preparing the plaster is usually used expanded perlite (perlite) - fine granules of white or light-gray tint.

• Vermiculite - one of hydrous minerals group representing small layered flakes golden brown scales. As perlite, bloating when heated capable of being filled with air. This form is used in various industries, including the construction, for the preparation of lightweight concrete and plaster mixtures warm.

• Gravels crumb - manufactured from special grades of low-melting clays, by calcining in rotating a certain angle melting furnaces. This fine fraction expanded clay with a grain size up to 5 mm, sometimes referred to as expanded clay sand. It characterized by ease, lightness, and thermal conductivity of a minimum round form granules.

• Sawdust - waste wood industry, for plasters applied fines to ensure the composition of the porosity, but not violate its structure and preserving uniformity of mass.

• EPS - expanded polystyrene beads are used not only for the production of MDF or bulk insulators, but also as a binder in ready-made or home-made plaster mixtures. If perlite and vermiculite - natural substances PPP - result of the activity of the chemical industry and is inferior to natural "colleagues" in durability, fire resistance and biological. However, copes with the assigned functions - making plaster porous and lowers its thermal conductivity.

In addition to the binder, filler and liquid in the plaster added modifiers - to increase elasticity mixture for longer "operability", to prevent the formation of cracks at the drying. Manufacturers dry mixes add various brand water repellents and softeners. When preparing the homemade plaster administered microfiber ready modifiers sold in DIY stores, various detergents (soap, dishwashing liquid) or PVA glue.

Coating produced by applying warm plaster composition, is not inferior to conventional cement-sand analogs of adhesion to the substrate (well adhered to the wall) and strength.

It can be applied to any finishing decorative coating. Select the appropriate help article of interior materials. At the same time, it has a low thermal conductivity - an average of 0.13 - 0.9 W / (m * C) and a density of 200 to 800 kg / mᶟ (depending on the filler). When using a warm plaster is significantly reduced load on the base, and easier to work with the solution - 1 m² walls need to "master" on all stages of lighter weight material.

Which filler is usually added in a homemade warm plaster

In private developers in the course as the most accessible TS - on the basis of sawdust and perlite or granules PPP. Vermiculite compositions - a rarity, due to the high cost of the filler - it is several times more expensive than perlite. Yes, and with a ready mix of famous brands is able to make friends, not every handyman selected as plaster warm kind. This is due, again, cost - buying finished dry mix will raise the price per square meter in two or three times. If we buy the components separately, these figures are reduced to a level affordable to almost everyone concerned. Calculations of our users to confirm the theory.

Sektor

Member FORUMHOUSE

The price of the factory warm plaster obtained space in comparison with a homemade mixture. On mᶟ 1 is approximately 25 bags weighing 23 kg (for example, take BIRSST T-2). It turns out the cube, or 575 kg, will cost 15,825 rubles. Material consumption: 7 - 8 kg dry mix per 1 m² - thickness 10 mm at the solution layer with a thickness of 4 cm, we obtain about 19 m² or 833 rubles per square.

How much will square homemade mixture, also calculated on the basis of their own experience.

Yura52

Member FORUMHOUSE

I 5 m² plaster 1.5 cm thick leaves cement bag, a bag three perlite and plasticizer, if C3, then inexpensive. Total, approximately 500 rubles - 100 rubles per square. By increasing the layer of 3-4 cm care is a much cheaper factory.

In many ways, the choice between the purchase and the composition of home-made depends on the intended scope of work - space of a few tens of squares can be plastered and serial mixture noticeable difference, but not fundamental. When we are talking about hundreds of square meters or tens of cubic savings covered and time spent on experiments with proportions, and any other costs.

Preparation of the solution

Typical perlite to cement ratio varies from 1/3 to 1/7.

Such a large spread explained versatility mixture - it is used for interior and exterior various bases. The capacity to adhesion, and other physical-technical characteristics at different surfaces, and parameters such as humidity and temperature in each case - the. It plays a role and skill of the performer: if a pro is able to develop almost any batch, then a novice, faced with a complex texture is likely to "zaporet" solution.

Furthermore perlite, may be added in batch sand, lime, microfiber, obtained for improving the strength and reduce the likelihood of surface cracking. When using a completed plasticizer proportions maintained according to the instructions, if PVA is applied - for each liter of the hardening liquid - 50 ml adhesive. To the solution was dripped on the surface, its consistency should resemble a thick cream. Achieve ideal proportions only on the basis of the standard recipe is practically impossible. Adhering to the basic recommendations have to try different "variations on the theme," until you find the most suitable to a particular situation.

Motorist He believes that in order to warm the plaster simply replace the share of sand, in whole or in part, on perlite. In the example of his friend, he is convinced of the effectiveness, consisting of a solution part of cement, two parts sand and two - perlite, foaming agents friend is not used, the plaster fell perfectly normal and holds. The only difference between the standard and warm water - the latter need to mix land, a few minutes filler releases the absorbed moisture and texture you get "what the doctor ordered."

The village and people

Participant FORUMHOUSE

Plaster made 2 years ago, the house is not yet live, will not crack anything, not heated in the winter. M-ratio of pearlite and cement 75 parts by volume of M500 was 7: 1, plus fibrovolokno (about 10-12), plus Cemaplast foaming agent (lime substitute). Fiberglass cast accordingly the volume of instructions and Cemaplast – in proportion to the cement.

Samurai Jack I chose the warm plaster, and decided to do with their hands, pick up suitable experimental conditions for its composition. The ratio of cement and perlite in the range of 1/4 to 1/8 by volume, slaked lime required rate of 0.5 parts by weight of cement. Also adding to the plaster polypropylene fibers, but polypropylene as well as glass in the alkaline cement environment is destroyed. As shown frother well-behaved dish detergent - about 0.1% by weight of cement.

Sektor in practice, I received the following expenses:

• Perlite - 60 liter bag;
• Cement - 19 kg;
• Water - 19 liters;
• Fiber - for instructions.

Among the three fractions sold perlite Sektor advised to take medium-sized granules (pictured in the center).

Kneaded solution mixer or by hand, but using the construction of the mixer, the dry ingredients are mixed together, fiber and liquid additives - water. The resulting liquid is added to the dry mixture and mixed until homogeneous. After solidification in solution a large amount of air pores.

The use of warm plaster

Work with a solution on the basis of perlite is virtually identical to the DSP technology plastering - the surface is cleaned by dirt and dust, if necessary, primed impregnations deep penetration before applying solution moistened. Not recommended for one approach to try and align completely sketch layer thickness of more than 1.5-2 cm. It is better to divide the process into two stages, first sketched blister layer thereon reinforcing beacons, and after finishing sketch and align beacons.

Between layers must be not less than four hours, cool and moist weather interval increases. Toolbox base - trowel or spatula, trowel, typically, the solution is applied upwards.

Participant FORUMHOUSE with the nickname The village and people She kneaded together with her husband plaster on the spot - in a large bowl, construction mixer. We worked together, too - my husband snapped, and she followed leveled on beacons rule. The layer thickness was 2.3 cm, and when making a swinging impingement, the solution becomes more elaborate.

Perlite forms a large amount of dust, it is recommended that wet before use.

Sektor

To less pylil perlite, his pre-sprayed with water and then added into the mixer. For preliminary mixing using an old bath.

Output

Naturally, warm plaster itself will not heat the house, you need a comprehensive approach to the warming, but, combined with external insulation and modern materials, masonry, quite effective. In addition, the tactile sensations of warm plaster wall pleasant.

A detailed discussion of warm plaster recipes and formulations can be found in the forum in the topic "Warm plaster hands. Is it worth it? ".To increase the energy efficiency space, a little warm plaster, heating should be appropriate, one of the most effective systems described in an article about the heated floor. How you can save not only on the plaster, but also in the construction as a whole, the user FORUMHOUSE know from their own experience, and willing to share with all interested in video "Budget savings when building a house of aerated concrete."

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