Plaster Cement

To mix the cement, concrete, with or without 10% of the lime should be thoroughly mixed with sand until the color is uniform. Then add water slowly while mixing continues until the desired consistency, or until the plastic just enough to spread and adhere to the walls of the building. Must be used within 45 minutes of the mixture and no plaster that has begun game should be remixed with water and used.

To mix the cement, gypsum, lime, cement, lime and sand can be mixed dry in required proportions and then mixed with enough water to moisten to desired consistency. With this method, the cast be used within 45 minutes of the mix and not re-hardening plaster party game should be attempted. In most cases, the mixture of lime and sand them first, to form what is known as the home-brewed, so that besides the lime hydration prior to use and makes it easier to implement, more plastic and faster adjustment. With this method of solution of 1 part lime with 6 or 41 / 2 parts sand (as the mixture should be 1:1:6 or 1:2:9), dried, and then with water to form a thick mixture, add water gradually. The mortar should be formed in a pile, covered with wet bags and left for a week to 10 days. Then, immediately before use, coarse material be mixed with cement to 1 part cement 6 or 9 pieces of bulk material, adding water if necessary to give coherence to a realistic fit for plastering a building. After the cement is added, the mortar should be used within 45 minutes and re-tempering of mortar should be attempted.

To mix the lime, the mixture of 1 part lime with sand Parts 3 and 4, first dry, with enough water to make a hard mixture. Heap, coverage and keep the moisture and allow couples from 7 to 10 days. Then rise again, adding water if necessary and is ready to use. Lime mortar, if kept moist in May it rest for 3 or 4 weeks before using. Sometimes up to 10% cement is added to thick material to accelerate the establishment, in this case, the mortar to be used within 45 minutes of mixing.

Another method is to apply cement plaster or cement, lime is to mix the lime with water to a thick cream and let stand for 24 hours to seven days before mixing with the sand.

The construction area must be bonded to be free of paint, oil, dust, dirt, etc. Since it is difficult to adhere to the plaster surface is very smooth, it's advice on the Building brick wall and block for raking the joints in one-half inch to provide a mechanical key, or strike the joints with little in close collaboration with the front wall of the building based on the roughness of the formation of a key. The joints should be raked over the mortar is still soft.

Dense concrete blocks should have a rough surface, which is best obtained by the wire brush, while still green and mussels should be treated with lime, instead of oil. Dense in situ concrete also must use a wire brush, while he was still "green" because, if allowed to harden, the surface is so smooth that it will probably be cut to ensure a satisfactory bond for plaster construction.

If the key is not formed by the roughness or piracy of dense concrete surface or cast in place or in blocks, a splash board layer 'of mortar should applied. It consists of a mixture of 1 part cement to 1 ½ parts of coarse sand mixed dry first, then with water to make a fairly wet mixture. These points in the building wall in an uneven, usually with a large brush with a severe beating motion perpendicular to the face of the wall of the building. This layer must remain moist during at least two days, then allowed to dry.

New brick and concrete walls should have a reasonable time to dry before plastering. When the wall has been prepared by cleaning, raking of joints, tighten or assign a 'splash-dash coat "is ready for plastering.

If the building wall is irregular and not directly, and it is desirable that the finish of the plaster surface of a real plan, it is necessary to "catch up" or dubbing of depressions by successive layers, each a 3 / 8 inch thick. Not be made to "feather edge" but must cease to form a rim about 1 / 8 inch thick. When I brought layers of the wall the building to a reasonable plan of the surface layers of plaster can be applied for real.

Michael Russell Your Independent Building guide.

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