Plastering on concrete should be in the ratio of 1:3. Laying of Plaster. The standard mix of the white cement requires to mix the white cement with water in the ratio of 2:1 proportions of water and white cement. Use plastering sand and mix well. White cement only needs water unlike the grey cement. That means, one unit cement will be mixed with four units of sand to prepare mortar. The strength can be increased upto 2.0 N/mm2 by decreasing one portion of sand. April 20, 2019 By Stucco Plastering Leave a Comment. Recommended plastering cement sand mix ratio for plastering of plane,rough surface of brick wall, concrete wall and ceiling are 1:6, 1:4, 1:5 & 1:3 are used respectively. To get dry volume consider 35% bulking of sand and 20% wastages = 1.2 m 3 x (1+0.2+0.35) (Rather than 35% sand bulkage and 20% wastage you can add 1.54 as constant) PPC cement is preferred in place of OPC-grade cement for plastering. For Roof plaster mainly ratio we use = 1: 4 (1 part of cement and 4 part of sand). Hi there, I would use a 5-1 ratio of sand to cement and use a good mortar plastisier. Always use Good quality of cement (Different grades of cement) as well as good quality sand. The ratio of Cement Mortar for Ceiling Plastering = 1:4. Plastering should be done with cement mortar ratio of 1:3, 1:4, 1:6 etc. Equipment: When purchasing the plaster mix at your local Mica store, make sure that you get advice on the correct water-to-mix ratio. Without water curing, traditional cement plastering will crack and fail, since water escapes when the plaster is applied, due to the porosity. Cement plastering advise, plastering over concrete walls - Duration: 18:42. Pulverized alum is added at the rate of 12 kg per cubic meter of sand. Adding Bulking of Sand & Wastage. When we add more water (more than 8%) to the sand, the thin film will disappear, and volume decreases. The most common mortar mix ratio for wall plastering is 1:6, here 1 part is cement and 6 part is sand in a workable amount of water. General Notes. Kirk Giordano plastering Inc. 929,547 views. Normally water cement ratio falls under 0.4 to 0.6 as per IS Code 10262 (2009) for nominal mix (M10, M15 …. The thickness of the Internal Wall Plastering … Waterproof plaster is needed for the protection of the masonry wall from the ingress of moisture and thus eliminating or reducing dampness of the wall. For Roof plaster mainly ratio we use = 1: 4 (1 part of cement and 4 part of sand). The cement mortar should be utilized within an hour after mixing. The surface is porous and water seeps in instantly. M25) We all know that water cement ratio will directly affect the strength of concrete. On concrete do not do plastering of more than 6mm thickness. 12.4.1 MATERIALS Cement mortar 1:3 or other specified proportion conforming to the requirements of Clause 3:2. Use a mesh while plastering the electric and water pipes. This shall consist of 2 coats. For plastering over a brick wall. Cement : Aggregate : Water ratios. Plastering a wall, whether old or new, is not as difficult as it may seem. Meaning of mix 1:3 mortar – in this mix ratio of cement and sand in which one part is cement and 3 part is sand and by adding water. i.e. as per the requirements of the work. Make a slurry of cement and sand in a ratio of 1 part of cement and one part of sand (1:1) and spray over the walls properly before 1 or 2 minutes of starting plastering, it helps to make good bound between wall and plaster. The masonry surface should be wet before applying the plaster to avoid the absorption of water from the mortar. The mixing ratio is 1 part cement and 5 parts sand, and if the plaster is too harsh, 0.5 to 1 part of lime can be added. Volume of cement mortar required = ( Plastering Area x thickness ) = 100 m 2 x 0.012m = 1.2 m 3 (This is wet volume of cement mortar (after mixing water) but we need dry volume. Water-Proof Plaster. Supplementary Mix Water The process of adding supplementary water above mix design water is used to combat substrate absorption and evaporation. Generally two coats of this mixture is needed to cover the walls evenly. What is Water Cement Ratio? / Archives for water cement ratio for plastering. Exterior plastering is usually called exterior rendering. 6. PRACTICE AND MATERIALS UNIQUE TO THE PLASTERING TRADE. Like that we can calculate the requirement of cement, sand and water for any ratio and thickness of plastering work. 7. In this video, I have explained: "Mix ratio of plastering/mortar for various purpose, Where 1:3, 1:4, 1:5 & 1:6 mix ratio can be used?". Means the ratio of cement and 4 part of cement, water cement ratio for plastering aggregates, and WC003 by! 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