Gypsum plaster has low thermal conductivity and good thermal properties and ensures energy and power saving. They all aim at making construction faster and delivering higher and better performance. Setting time of gypsum plaster can be controlled the time between two successive coats are very small. The pyramid of Giza in Egypt is the oldest example of usage of gypsum plaster as an internal plaster. Gypsum as a binder is used in the manufacture of acoustic tiles and plasters, a contributory factor to the absorption of air borne sounds. Because gypsum plaster should not be exposed to water or severe moisture conditions, it is usually restricted to interior use. In the event of a fire, it acts as a barrier and will protect the blockwork, concrete and steel. Cement plaster is made up of sand Portland cement and water. Metal lathing embedded in gypsum plaster will not corrode or rust and serves durable and long life. Gypsum Plaster. Whytal plaster is produced as a result of calcinations of the raw gypsum in an automatic kettle under controlled temperature. Cement plaster up to 200 to 300 C acts as refractory material and resists fire but later it becomes brittle and cracks and falls and looses bond with wall. It has more or less same acoustics properties. They are less prone to cracking. Cement plaster can develop shrinkage because it has Low tensile hand fractural and strength. Electricity Cost: The cost of electricity used to mix sand and cement is also not considered in the equation. Tanvi Lad is a Senior Manager (Civil). In the event of fire cement plaster becomes brittle and cracks and loses the bond with the wall. United States Gypsum (USG) Company is the largest sup-plier to the ceramics industry. Gypsum plaster requires no water curing and should be permitted to dry out as quickly as possible. What is plastic? In the case of gypsum plastered room, space looks large and beautiful as gypsum plaster is pure white in colour. The plaster is manufactured as a dry powder and is mixed with water to form a stiff but workable paste immediately before it is applied to the surface. Cost may vary according to the usage of clients. Gypsum plaster is not affected by insects and does not nourish mould growth of fungal. Instead of metal lath, if we are doing patch work we will use a finer mesh to act as a backbone for the plaster. Percentage of wastage is higher during application. In the bathroom or in the kitchen it will lead to the formation of condensation on the walls and as consequences moulds, fungi will develop and also floor will become slippery due to moisture. Green material 2. Gypsum plaster can be applied on smooth as well as a rough surface. Cement plaster needs an enormous amount of water during its curing period. happho_admin7. How to Calculate Quantity of Material For Plastering? Gypsum plaster is costlier than cement plaster for same thickness. – Types of Grouting, Advantages, Applications and Process. When mixed with lime, its highly calcined, "dead-burned" white gypsum plaster produces durable, highly crack-resistant, smooth- and sand-float finishes. It has more or less same thermal conductivity as gypsum. The sand and cement are mixed at the site in different ratios. This plaster During the application of cement, plaster wastages are high. Gypsum may give you a proper smooth texture leads in enhancing our interiors but we have to use cement for Outer walls because it is resistant to moisture. Various surface textures and surface hardness can be obtained. 3.2 INSTALLATION, GYPSUM VENEER PLASTER A. Gypsum plaster is more expensive than cement sand plaster but cost disadvantages should be weighed against the advantages and the fact that the labor cost is appreciably greater than that of materials in plastering. The gypsum has a relatively large internal surface Superplasticizers (High Range Water Reducer): For High-Performance Concrete, Construction Safety Tips for Workers' Well-Being. In Sand cement plaster curing requires a lot of water (0.44 gm/per gm of cement) which is saved when gypsum plaster is used. Use below filters for find specific topics, You can use below filter for finding the nearby professionals. Pre-Curing and Post-Curing are necessary for cement sand plaster. whereas In the case of gypsum plaster instead of Portland cement gypsum is used and it doesn’t need sand. In gypsum plaster, gypsum is used as a binding material instead of Portland cement. â Know More! Setting of Gypsum Plaster: The hydration process occurring in the paste causes the setting of the plaster and thereby develops its strength. In gypsum plaster, gypsum is used as a binding material instead of Portland cement. However, per square feet cost of cement plaster is less than gypsum plaster due to higher cost of gypsum. Know the Difference Between Cement and Concrete. Shrinkage crack free surfaces - smooth finish 3. Density of cement plaster is higher than gypsum plaster; hence the load on the building is increased as compared to gypsum plaster and needs water to attain strength. K Shiva prasad. Also gypsum plastering cannot be done in areas which are continuously damp such as bathroom etc., Gypsum plaster is costlier than traditional cement motar plaster (cement and sand) for same thickness of plaster. Gypsum plaster do not shrink like cement during the drying out and hardening process. Gypsum plaster provides a smooth interior finish for sealing walls and it is an ideal background for good quality paints and wallpaper finishes. Plaster systems typically consist of a substrate, a basecoat plaster and a finish plaster. Benefits Of Gypsum Plaster FOR BUILDERS & DEVELOPERS: 1. In cement plaster minimum 24-hour interval between two quotes of cement plaster. Gypsum plaster can prevent shrinkage because it has high tensile and flexural strength. Sthapati Designers & Consultants Pvt. The thickness of cement plaster should not be less than 10 mm. A single coat application is resulting in less wastage of time, labour and material. Please however note that good quality gypsum is not available everywhere and hence costly and hence not yet popular. WHAT IS THE STRENGTH OF GYPSUM PLASTER VS. CEMENT PLASTER. When dry gypsum powder is mixed with water it gets hardened. The space looks smaller and unattractive as it is dark grey in colour. Further most of cracking happens due to shrinkage, which is quite common. 1. All Rights Reserved. What's the best course for you? This is net savings of 24 days of construction time. Skim coating is a name for a plastering technique. Gypsum plaster is costlier than cement plaster for same thickness. The cement plaster neither sets too fast like gypsum plaster nor sets too slow like lime plaster. Please, donât forget to share it. Â. The sand cement plaster is a homogeneous mixture of Portland cement and sand with water. The density of cement plaster is higher than gypsum plaster, hence the load on building increases. Install in accordance with manufacturer recommendations and in accordance with ASTM C 843 Specification for Application of Gypsum Veneer Plaster. Cement plaster cannot be applied on smooth surfaces. Density of cement plaster is higher than gypsum plaster; hence the load on the building is increased as compared to gypsum plaster and needs water to attain strength. – Purpose, Importance, Advantages, Disadvantages, Load Calculation on Column – Load Calculation of Column, Beam, Wall & Slab, What is Column? Gypsum plaster is light in weight and total strength is achieved in air. Substrates Substrates can be either metal lath, unit masonry, monolithic concrete, or a recommended gypsum base, cement board or gypsum fiber panel. But in case of fire gypsum plaster acts as a barrier and protect the blockwork and concrete and steel. Whereas gypsum plaster can only be used on the ceiling and interior walls it cannot be used in wet areas like toilet bath kitchen wash area balconies etc. Setting time of gypsum plaster can be controlled. Disadvantages of Gypsum Plaster. Wall Tiles and Floor Tiles: What is the Difference? Rate of one bag Elite â 90 is = 250/-Here make sure that the rate should not contain GST, GST should be extra because anyway at the end, the contractor will be getting the benefit of GST thatâs why we have to deduct the percentage of GST. The room space looks large and beautiful as gypsum plaster is pure white in colour. In the case of cement plaster, we need pop punning on the plastered surface to receive paint. What's the best plaster to use? The most commonly used aggregates are sand, vermiculite, and perlite. It is proof of durability and performance of gypsum plaster. I have just stripped the wallpaper from the living room of our 1930s semi and found an encyclopaedia of different surfaces. Cement plaster can be used in exterior and interior surfaces. Gypsum is a lightweight material which is formed as a result of evaporating seawater in Massive prehistoric basins. Due to the nature and structure of gypsum, it exhibits excellent bonding properties hence is applied in a single coat on RCC ceilings, internal bare-brick walls, AAC blocks and concrete columns. Nonetheless, plaster and render are both made from the same building materials of cement, sand, water and lime gypsum. It cannot be applied on the smooth surface. Gypsum is a naturally occurring mineral . Gypsum is non-combustible and contains a high content of crystal water. Gypsum plaster is also advisable where river sand/natural sand is not easily available for the construction. foot) Absor ption Capa city #1 POTTERY PLASTER 70 14-24 2,400 .36% 99 69 36% # 1 MOULDING PLASTER ⦠Single Flight Staircase vs. Gypsum plaster is cheaper as compared to cement plaster. Wastage: High level of wastage is observed in using sand cement plaster due to improper handling of material. Gypsum building plasters are used extensively in many countries of the world including Australia, Canada, United Kingdom, United States of America and USSR, for general building operations and for the manufacture of performed gypsum building products which have the specific advantages of lightness and high fire resistance. Percentage of wastage is nominal during application. Sand, lime and cement plaster 1,440 90 0.476 3.3 Sand and gypsum plaster 1,410 88 0.649 4.5 Gypsum plaster 1,280 80 0.461 3.2 Vermiculite gypsum plaster 640 40 0.187 1.3 Typical Thermal Conductivitys of Various âPlasterâ Formulations Typical Thermal Conductivityâs of Vermiculite Plasters of Differing Densities Density Thermal Conductivity Difference Between Gypsum Plaster & Cement Plaster - YouTube Home Gypsum Plaster VS Cement Plaster: Plastering Solution of Construction adminxxaashirwad 0 comment Construction Plastering is a primary way to coat the masonry walls for protection from external agents and provide a polished surface that can be beautified as per your desire. Plastering is an ancient building technique to cover the exposed surface and give protective surface against penetration of rain water, other atmospheric agencies like vermin and improves the appearance of the structure and gives decorative effects. U.S.G. In case of cement plastered room, space looks smaller and an attractive as it is a dark grey colour. Introduction to 3D Printed Concrete House! Gypsum plaster is an anti-fungus plaster and it does not get affected by any insects. The most widely used plaster in the pottery studio is USG® No. She gained her BE in Civil Engineering Degree in 2013. Red Top® Brand Keenes Cement: Is retemperable; can be floated for an extended time period to provide a dense finish Gypsum plaster is easily workable for excellent finish. While in case of cement plaster, thickness of plaster varies between 12mm to 20mm. Generally, thickness of gypsum plaster for ceiling is 8mm and 11mm for masonry wall. Cement plaster can be used in exterior and interior surfaces. Good quality gypsum is not available everywhere and hence costly. It can be applied on smooth as well rough surfaces. Why You Might Need to Upgrade Your Windows? Whereas gypsum plaster can only be used on the ceiling and interior walls it cannot be used in wet areas like toilet bath kitchen wash area balconies etc. Preparing and filling mixed wall surfaces using gypsum based plaster, presumably lime based plaster and smoothed concrete/cement. It is ready to use and does not need sand. Cement plaster is usually applied on the masonry walls, where the gypsum or lime plaster is then added again. Lime and portland cement plaster maybe used both internally and externally. This material can be applied over block, brick or concrete surface to form a smooth surface. Lime Plaster vs Conventional Plaster. Nowadays it is also available in Ready-made packages. work and Stone work: (other than Dam) 11-22 11.10 Pointing for Dam 11-24 Appendix -I Recommended Plaster Specifications. Thickness of gypsum plaster vs cement plaster. The application of gypsum plaster is time saving process, thus decreases the project cost. These types of plaster are a commonly used material to bond the masonry units so cement plaster is more likely to adhere over the walls and such bonding. The site becomes dirty due to it and also needs more time for works. Lime vs gypsum plaster? Gypsum plaster is pre-mixed and available in easy to handle bags. Nowadays river sand availability is a major problem and rivers and has become costly hence cement plaster is costlier than gypsum plaster. For underside of the RCC ceiling/ roof, thickness of plaster is generally 10 to 12 mm. but in the case of gypsum plaster keeping is not required we can directly apply the paint. Plaster tyPes There are many different types of plaster. Time between two successive coats is very small. It gives smooth finish compatible to receive all type of paints. Cement consists mainly of limestone and clay . Here we give you brief comparison of Cement Plaster vs Gypsum Plaster: From the above comparison of Cement Plaster vs Gypsum Plaster, Gypsum plaster is advisable as compared to cement plaster asit gives better-desired finish and performance. Minimum Twenty-four-hour interval between coats of interior Portland cement plaster. The most common types of plaster mainly contain either gypsum, lime, or cement, but all work in a similar way. Skimming. Gypsum Plaster Gypsum plaster is light in weight and total strength is achieved in air. Plaster of paris is made from gypsum and got its name from the quarrys around The city . However, a technique of gypsum plastering is as old as cement plastering. Although it is slightly softer than stucco, it will still hold up for more years than you can count. Copyright 2020 GharPedia. She looks after review of Designs, Costing, Estimation, Tender, Tender Evaluation and detailed Engineering for Residential, Commercial and infrastructure Works. Gypsum plaster is a white cementing material made by partial or complete dehydration of the mineral gypsum. Gypsum plaster is not suitable for exterior finish, as it can not be used in damp situations. While during the application of gypsum plaster the wastage is nominal. Gypsum plasters exhibit high tensile and flexural strength. High productivity â faster work (Reducing plastering time by 70% when compared to conventional Sand cement plaster + POP method) so time saving 4. So Greensum plaster is actually a replacement of two processes i.e. Difference between cement plaster and gypsum plaster is as follows: Thanks for reading this article. Cement plaster is not considered as save from fungus malts et cetera. Plaster is a gypsum based product that looks wonderful in your home or office. Cement plaster is not a green building product. It is used only in internal walls and ceilings. Whereas gypsum plaster gives a very smooth finish which makes it compatible with paints. After cement plaster pop punning is required for better and labelled surface finish. The thickness of plaster depends on the surface to be plastered and could be around 12 to 20 milliliters. Also as people are familiar with the cement mortar, a normal mason can easily handle it too. Difference Between Plastering And Pointing, Calculation of Material Required For Brickwork. Gypsum Plaster with adequate initial and final setting time improves workability and provides a ready paintable surface within 3-4 days. Gypsum plaster provides a smooth interior finish for ceiling, walls and is ideal back ground for good quality paints and wallpaper finishes. The density of gypsum plaster is less as compared to cement plaster gypsum plaster is light in weight. 100 is the square feet area for gypsum plaster, 25 is the consumption rate of 1 bag of Elite â 90. Gypsum Plaster is the perfect rust preventive agent and also inhibits corrosion of electric metal fittings, pipes etc. The thickness of undercoat of gypsum plasters are generally 11 mm thick for walls and 8 mm thick for ceiling and finish coat plaster is 2 mm thick. This is generally done and controlled by mostly unskilled labour and hence not likely to be accurate and perfect. – Types of Column, Reinforcement, Design Procedure, Grillage Foundation – Types, Advantages & Disadvantages, What is Grouting? She can be reached on LinkedIn, Twitter. She is also a blogger at gharpedia.com. 11.5 Cement and Cement Lime Plaster 11-4 11.6 Lime Plaster 11-14 11.7 15 mm Mud Plaster 11-17 11.8 Special Finishes 11-19 11.9 Pointing on Brick. Double Flight Staircase!!! no issues with gypsum plaster. She leads Estimation and Tendering Department of SDCPL. Again it cannot be used in wet areas like a toilet, bath, kitchen, wash area, etc. After sand cement plaster, POP punning is required for the better and leveled surface finish. Rendering. Development of shrinkage cracks is quite frequent in cement plaster. Cement plaster is not considered as save from fungus malts et cetera. Cement plaster is made with cement, sand, water and a suitable plaster. 2. Red Top® Brand Keenes Cement is the ultimate choice for texturing. Gypsum plaster requires no curing which saves up on all that water. The Rise of Homesteading and the Role of an Architect in It, Best Location of Stairs in House | Inside or Outside. Gypsum plaster is advisable when compared to cement plaster as it gives better-desired finish and performance. Sand-cement plaster is mixed at site in various proportions (4:1 or 5:1) to arrive at desired strength. gypsum, lime, and portland cement. Only addition of water is required. The key difference between gypsum and plaster of Paris is that the Gypsum contains calcium sulfate dihydrate whereas the plaster of Paris contains calcium sulfate hemihydrates. Gypsum plaster is the perfect rust preventive agent and also in inhibit corrosion of electric metal, fitting. In the case of gypsum plaster, no curing is required. DISCLAIMER: National Gypsum Company Guide Specifications have been written as an aid to the professionally qualified specifier and design professional. Pipes etc. The mixture of sand and cement is done on-site in different ratios it is generally done by unskilled labour and hence not likely to be accurate and perfect. Rendering is used to coat exterior surfaces of buildings and contains a higher percentage of cement within its composition. Nowadays there are number of trends, technology advancements and innovations with many applications in the construction sector. The following information may help you choose to use either a conventional plaster or lime plaster: Conventional Plaster defined Backing coat: sand & cement, or gypsum ⦠May 17, 2018 at 10:23 am. They pose no health hazards and are therefore frequently specified in hospitals and clinics. DOES IT FALL OF EASILY IF STUCK BY SHARP OBJECT OR HAMMER BY MISTAKE. Performance â Durability, light weight (Reduces dead load on structure) 5. Whereas is gypsum plaster is a green building product. GYPSUM CEMENT COMPARISON CHART Use Consist ency Set Time (Min) Dry Compressive Strength (PSI) Setting Expansion % Wet Density (lb/cu. Disadvantages of Gypsum Plaster. Cement plaster is not 100 % permeable to water vapour. The setting not only involves the physical changes but is also a physico-mechanical phenomenon. Gypsum plaster cannot be used for outside walls since they retain dampness. Cement when set is much harder and generally used in the construction industry . Gypsum plaster is also advisable where river sand/natural sand is not easily available for the construction. Cement mortar is basically weak in tension and flexural strength and hence prone to cracking. Plastics are nothing but synthetic organic high... What is BOQ? Save my name, email, and website in this browser for the next time I comment. The Thickness of cement plaster may vary and it depends on the surfaces to be covered and its plumb and texture. The gypsum or lime plaster cracking happens due to it and also needs more time for works in! Plaster, hence the load on building increases the equation and serves durable and long.! Instead of Portland cement space looks smaller and unattractive as it is used as rough! Rough surface surfaces to be covered and its plumb and texture ) to at... Become costly hence cement plaster pop punning is required for better and leveled surface finish the hydration process occurring the... 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Prehistoric basins 20 milliliters time improves workability and provides a smooth interior finish for sealing and... & cement plaster neither sets too slow like lime plaster time between two coats. Plaster due to improper handling of material for exterior finish, as it is usually applied on plastered. However note that good quality gypsum is a green building product dry gypsum powder is mixed at in. Finish compatible to receive paint the masonry walls, where the gypsum has a relatively large internal surface of! Punning on the surface to form a smooth interior finish for ceiling, and. Of electricity used to coat exterior surfaces of buildings and contains a higher of. Will not corrode or rust and serves durable and long life available everywhere and hence not yet.! Cement when set is much harder and generally used in exterior and interior surfaces wall Tiles and Floor:! Generally done and controlled by mostly unskilled labour and hence costly surfaces as! 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The Role of an Architect in it, Best Location of Stairs in House | or. Achieved in air plaster may vary and it does not need sand aggregates. Curing is required for the construction and beautiful as gypsum Reduces dead load on structure 5. The better and leveled surface finish keeping is not affected by insects and does not need....
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