Schindler, P.J. For interior work single coat plaster is applied. It is intended for architects, building contractors, building inspectors, and anyone in need of guidance to achieve a satisfactory standard of work. Application of Rendering Coat; Application of Floating Coat; Application of Finishing Coat; Two Coat Plaster; Single Coat Plaster; Cement Plaster and Cement Lime Plaster; Plaster on Lath. In the case of 3-coat plaster, the first coat is known id rendering coat, the second coat is known as a floating coat, and third coat is known as setting coat or finishing coat. In plastering dangerous types of equipment are used. methods of plastering application and curing, Definition:- Plastering is a process of covering tough surfaces and uneven surfaces with plastic material called plaster or mortar to obtain even, smooth, regular, clean & durable surface Plaster:- A…, Follow we civil engineers on WordPress.com. It is very important to ensure that there should not be any chance of the plaster getting debonded due to presence of materials harmful for bonding. Plaster is formed through the mixture of dry materials either by the use of these components of sand, gypsum, lime or cement together with water to form a stiff but workable paste before it is immediately applied to the surface. 10 cm wide strips or 15 cm x 15 cm patches are applied at a suitable distance. 7. First, … Metal laths are available under various patent names. Aspects dealt with include selection of materials, mix pro-portions, surface preparation and correct plaster application. After fixing the lath, the surface is plastered, usually, in there coats, cement mortar is used. The present invention relates to a method of plastering the surface of the concrete by mixing the adhesive resin and the color silica. First coat mortar filling (1:4 Cement and Sand) up to 15 mm will be applied on surfaces where required mortar thickness exceed 25mm. This coat is allowed to harden slightly a then scratch marks are made on the surface with the help of trowel ledge. Exterior plasters, often called stucco, normally contain portland cement because of its low solubility in water. Three Coat Plaster. Read More: ESTIMATION OF A BUILDING WITH PLAN. By using nozzles or sprayers, water is sprayed on the concrete members, which are to be cured. Methods that maintain the presence of mixing water in the concrete during the early hardening period. 9th July 2020 by Krunal Rajput 2 Comments. Preparation of surface of the masonry/brickwork , and the application and curing shall be as specified in clause 13.1 12.2.3 SURFACE FINISH Unless otherwise specified all surfaces of lime cement plaster for external rendering shall be wood floated; internal plastering shall be trowelled and finished with a setting coat of lime putty. A rough texture has to be obtained to provide a mechanical key for the next coat. Plastering Defination of plastering : The word “plaster” comes from the Greek language meaning “to daub on”. The thickness or floating coat is 6 to 9 mm. The background is prepared before applying plaster. The adoption of a particular method will depend upon the nature of work and the climatic conditions. Different Grades of Concrete and their Uses/Applications, How to calculate Quantity of Cement, Sand & water In Mortar of 1:4, HOW TO CALCULATE BRICKS, CEMENT, AND SAND QUANTITY IN 9" BRICK WALL, What is slump & It's types, Values for various construction work, FINENESS TEST OF CEMENT BY BLAINE'S AIR PERMEABILITY METHOD (IS-4031-PART-2), How to calculate number of Bricks per Square meter (m2), Difference between Compaction and Consolidation of Soil. Then the spaces between screeds are filled with mortar and properly finished. I am a Degree Holder in Civil Engineering. Methods Of Plastering Preparation of background: For plastering new surfaces, all masonry joints should be racked to a depth of 10 mm in brick masonry and 15 mm in stone masonry for providing key to the plaster. The Man Behind CivilJungle. Lime plaster is applied in these coats or in three coats or in two cots. Methods of Plastering. First coat also known as rough coat is applied on the surface in a layer of 6 to 10 mm in thickness. It is applied similar to two coat plaster except that the rendering coat as applied fro two-coat plaster is finishing off immediately after it has sufficiently hardened. Cement paste on concrete surfaces will be applied to improve the bonding of plaster to theconcrete surfaces. Water curing is an absolute must during this period. Wooden laths are used and ceilings. The first coat is prepared properly to apply the second coat, i.e., a floating coat. Plastering in Case Total Thickness is More Than 20mm The areas where plaster thickness is expected to exceed 20mm, a multiple coat of plaster must be applied in receding thickness. A base coat of 15-20mm thickness should be applied and cure it for two days. Plastering is one of the final steps in finishing an interior or exterior wall. Then it is allowed to dry completely. Professional plasterers look after the cleaning of the mess and do not spoil the objects around the place. How do I calculate volume of 50 Kg cement bag? Those dots are transferred on the upper level with a plumb bob, so the dots of the upper level and lower come in one and vertical surface. Hey, I am Krunal Rajput. These include ponding or immersion, spraying or fogging, and saturated wet coverings. House Construction Cost Calculator Excel Sheet For Ground Floor(G.F.), G.F.+1, G.F.+2, G.F.+3, Calculator for Cutting Length of Stirrups, IS 516:1959 Most Important Point (Method of Tests For Strength of Concrete). Application: On Concrete Surfaces: After application of PLAXIT 114 as a key coat on concrete surfaces and curing it at least for 2 days, apply PLAXIT 154 to the required average thickness of maximum 15-20 mm. This is used only in interior quality work. It is also pointed out that the quantity of water, normally mixed for making concrete is more than sufficient to hydrate the cement, provided this water is not allowed to go out from the body of concrete. Curing should be started as soon as the plaster has hardened sufficiently and must be cured for at least 7 days. Curing shall commence, 24 hours after the plaster is laid. 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It is very important to ensure that there should not be any chance of the plaster getting debonded due … Cure the plaster/render with clean potable water for a period of 3 days with 4-5 times a day. information needed for successful plastering. The thickness of the coat should be such as to cover all inequalities of the surface normally this thickness is 12mm. curing is big task. To maintain interim thickness and vertically of plaster 15 cm * 15 cm dots or are provided, Then a vertical strip of mortar known as the spread is formed at a distance of 2 m. spacing. This groove willbe filled with approved weather sealant. 1) Water Curing of Concrete: Application of first coat: Mixed CP2 has to be applied to the prepared background, as a spatter dash/rush coat to a thickness of 6-8 mm. The first coat is racked as a rendering coat. Interior plasters usually contain gypsum. ASTM C926, Standard Specification for Application of Portland Cement-based Plaster , defines stucco curing as “the act or processes of producing a moisture environment favorable to cement hydration, resulting in the setting or hardening … Difference Between 33, 43 and 53 Grade Cement, Difference Between Carpet Area and Built-up Area, Difference Between CPM and PERT/PERT Vs CPM, Difference Between Fat Lime and Hydraulic Lime, Difference Between Flexible Pavement and Rigid Pavement, Difference Between Footing and Foundation, Difference Between Lap Length and Development Length, Difference Between One Way Slab and Two Way Slab, Difference Between Plasticizer And Superplasticizer in Civil. Modern plasters can contain portland cement or gypsum products. Four dots are covered masonry with the help or screed, and plaster is applied properly. These methods Hauser, in Chemical Finishing of Textiles, 2004. CURING METHODS AND MATERIALS Concrete can be kept moist (and in some cases at a favor-able temperature) by three curing methods: 1. 28 Mar 2018 29 May 2018. With masons trowel and pressed well into joints and over the surface. In plastering usually 3 numbers of coats are applied. The joints are ranked at a depth of 20 mm. Curing of concrete pavements, run ways, bridge decks etc. Maximum width of 20mm horizontal grooves between walls and beams will be formed bycutting using grinders with diamond wheels after plastering the wall surface. But with the presence of curing compound it is easier. Water curing process is mandatory for 20 – 21 days after sand-cement plastering to reduce shrinkage cracks arising due to heat of hydration. Laths may be. The following are the Curing of Concrete methods. I am a Degree Holder in Civil Engineering. A local plasterer will not pay heed to you and your place safety. Sometimes, the term ‘rendering’ is used instead of plastering when the plaster or cement is applied to the external surface of the wall either to improve the appearance or to protect then from wether agencies, such as rain heat, etc. You can find him on Facebook, Twitter, Tumblr, Instagram and Google News. The purpose of this coat is to bring the plaster to an even surface. Early plaster systems could contain lime, gypsum, marble dust, fibers and sand in up to three coats. The Semi Dry Plaster Mix is a common method for applying the plaster in Gulf Area The application of both type of plaster has no relation to the architectural finishing but to the nationality of the applicators. Your email address will not be published. While applying plaster is a highly technical process that is usually best left to professionals, any homeowner can do it themselves provided they follow a few key guidelines. Form ties and other obstruction shall be removed or trimmed back even with the surface of the solid base. For larger areas of concrete surfaces which are opened to sunlight, wind etc. All dirt and dust are cleared. Clean the surface and remove any dust, contaminated materials on plaster bases and substrates for direct application of plaster, removing loose material and substances that may impair the work. The Man Behind CivilJungle. The procedure of applying three-coat plaster is similar to two-coat plaster only difference is that an intermediate coat is known as a floating coat. Wooden Laths; Metal Laths Methods Used For Curing of Concrete There are various methods of curing. It can be an efficient method for curing by supplying additional moisture during hot weather. The floating coat is applied, and after seven days finished coat is applied, after 6 hours of applying a floating coat. Shading concrete work Covering concrete surfaces with hessian or gunny bags Sprinkling of water Ponding method […] 09. Curing by spraying of water or fogging is one of the conventional methods of curing concrete in the construction industry. Laths are provided as a foundation to receive plasterwork. Enter your email address to follow this blog and receive notifications of new posts by email. It is wetted properly. The method allows keeping the walls wet throughout the curing period. 5) Miscellaneous curing. Second coat is then applied over the first coat after the lattez has set and rough thickness of mortar in second coat vanes between 6 to 10 mm. Get Traffic & Exposure. The thickness of the final coat may vary from 2 to 3 mm. HSE. Your email address will not be published. In this process, the crosslinking reactant, catalyst, softener, and other components are dried on the fabric prior to the crosslinking reaction that takes place during the curing step. can be cured to reach their maximum strength. This is the process of covering rough surfaces with a plastic material to obtain an even, smooth, regular, clean & durable surfaces. The following methods of curing of concrete are generally adopted. The rubbing is done till the finishing coat is quite dry. The plain expanded metal lath(exam) is commonly metal laths are fixed to the surface by G.I Staples. Improper curing may lead to cracks formation or efflorescence in plaster work. The floating coat is beaten with floats edge at the close spacing of cm. A minimum 48 hours have to elapse prior to the application of the second coat. In this, any dots are applied on all the surface of the wall at 1500 to 2000 mm. (1) Water curing (2) Membrane curing (3) Application of heat . 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