Improper curing may lead to cracks formation or efflorescence in plaster work. 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. Maximum width of 20mm horizontal grooves between walls and beams will be formed bycutting using grinders with diamond wheels after plastering the wall surface. It is wetted properly. For good quality works, either two coat or three coat plaster is applied. How do I calculate volume of 50 Kg cement bag? The surface is cleaned, and water is sprinkled property on it. Water curing process is mandatory for 20 – 21 days after sand-cement plastering to reduce shrinkage cracks arising due to heat of hydration. I am a Degree Holder in Civil Engineering. Exterior plasters, often called stucco, normally contain portland cement because of its low solubility in water. The application of liquid membrane-forming curing compounds is the most widely used method for curing concrete. 09. You can find him on Facebook, Twitter, Tumblr, Instagram and Google News. 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. Four dots are covered masonry with the help or screed, and plaster is applied properly. Difference Between Plinth Level, Sill Level, and Lintel Level. 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. This groove willbe filled with approved weather sealant. 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 … The floating coat is applied, and after seven days finished coat is applied, after 6 hours of applying a floating coat. I started this site to spread knowledge about Civil/Mechanical/Electrical Engineering. In plastering dangerous types of equipment are used. Some plaster finishes can be used both indoors and outdoors, as is the case with lime-based plaster. Then it is allowed to dry completely. 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. Share it with your friends! Methods Used For Curing of Concrete There are various methods of curing. Schindler, P.J. These patches or strips act as a gauge for thickness or floating coat. First, … Read More: ESTIMATION OF A BUILDING WITH PLAN. The Man Behind CivilJungle. Laths are provided as a foundation to receive plasterwork. Wooden laths are used and ceilings. Required fields are marked *. The Man Behind CivilJungle. Gypsum plastering is also a faster application method for internal surfaces, since it does not require time consuming water curing process. 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. This coat is allowed to harden slightly a then scratch marks are made on the surface with the help of trowel ledge. 7. Laths are fixed in a parallel line with a clear spacing of 10 mm and secured to the surface with galvanized iron nails. information needed for successful plastering. The third coat is called a finishing coat. 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. I started this site to spread knowledge about Civil Engineering. 9th July 2020 by Krunal Rajput 2 Comments. The method allows keeping the walls wet throughout the curing period. Early plaster systems could contain lime, gypsum, marble dust, fibers and sand in up to three coats. 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. 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. Plater is applied in the manner mention below. 5) Miscellaneous curing. 28 Mar 2018 29 May 2018. All dirt and dust are cleared. It is very important to ensure that there should not be any chance of the plaster getting debonded due … All mortar droppings and dust and laitance (in case of freshly laid concrete) should be removed with the help of stiff wire brush. The rendering coat is applied, and scratches are made. A base coat of 15-20mm thickness should be applied and cure it for two days. HSE. Wooden laths are well seasonal wooden strips 25 mm wide and 1 to 1.2 m long. This is the process of covering rough surfaces with a plastic material to obtain an even, smooth, regular, clean & durable surfaces. Then, the first coat is applied. The joints are ranked at a depth of 20 mm. The rubbing is done till the finishing coat is quite dry. Your email address will not be published. Three Coat Plaster. 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. Like this post? In the case of concrete or masonry surfaces, wooden plugs have to be embedded for fixing the lath. 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. In the US, the there are two main types of plaster, and they have different properties. The adoption of a particular method will depend upon the nature of work and the climatic conditions. The thickness of the final coat may vary from 2 to 3 mm. can be cured to reach their maximum strength. The plain expanded metal lath(exam) is commonly metal laths are fixed to the surface by G.I Staples. Curing by spraying of water or fogging is one of the conventional methods of curing concrete in the construction industry. The background is prepared before applying plaster. Also, read: What Is Plaster | Type of Plaster | Defects In Plastering. These methods Building Materials. Also, read: Difference Between Bitumen and Tar | What Is Bitumen | What Is Tar. Metal laths are available under various patent names. Professional plasterers look after the cleaning of the mess and do not spoil the objects around the place. During this period, the surface is curved and then allowed to dry completely. 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). Then curing is done after one day for seven days. The thickness first coat is kept 2 to 3 mm less than a total thickness of plaster. Cement paste on concrete surfaces will be applied to improve the bonding of plaster to theconcrete surfaces. CURING METHODS AND MATERIALS Concrete can be kept moist (and in some cases at a favor-able temperature) by three curing methods: 1. Plastering. Plastering is one of the final steps in finishing an interior or exterior wall. 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. Shading concrete work Covering concrete surfaces with hessian or gunny bags Sprinkling of water Ponding method […] Get Traffic & Exposure. 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. 10 cm wide strips or 15 cm x 15 cm patches are applied at a suitable distance. Curing of concrete pavements, run ways, bridge decks etc. Materials are subjected to GIJV’s approval & applied in site as per manufacturer recommendation. Lime plaster is applied in these coats or in three coats or in two cots. 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