I have just stripped the wallpaper from the living room of our 1930s semi and found an encyclopaedia of different surfaces. Cement plaster is not 100 % permeable to water vapour. Cement plaster cannot be applied on smooth surfaces. It cannot be applied on the smooth surface. After sand cement plaster, POP punning is required for the better and leveled surface finish. In the case of gypsum plaster, no curing is required. Gypsum plaster is a white cementing material made by partial or complete dehydration of the mineral gypsum. 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. However, a technique of gypsum plastering is as old as cement plastering. 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. The space looks smaller and unattractive as it is dark grey in colour. Gypsum is a naturally occurring mineral . Double Flight Staircase!!! Gypsum plaster has low thermal conductivity and good thermal properties and ensures energy and power saving. Skim coating is a name for a plastering technique. 2. Instead of metal lath, if we are doing patch work we will use a finer mesh to act as a backbone for the plaster. What's the best course for you? GYPSUM CEMENT COMPARISON CHART Use Consist ency Set Time (Min) Dry Compressive Strength (PSI) Setting Expansion % Wet Density (lb/cu. The most commonly used aggregates are sand, vermiculite, and perlite. Whereas gypsum plaster gives a very smooth finish which makes it compatible with paints. They are less prone to cracking. 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 “Plaster” Formulations Typical Thermal Conductivity’s of Vermiculite Plasters of Differing Densities Density Thermal Conductivity 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. Cement plaster is made up of sand Portland cement and water. This plaster work and Stone work: (other than Dam) 11-22 11.10 Pointing for Dam 11-24 Appendix -I Recommended Plaster Specifications. A single coat application is resulting in less wastage of time, labour and material. The density of cement plaster is higher than gypsum plaster, hence the   load on building increases. 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. United States Gypsum (USG) Company is the largest sup-plier to the ceramics industry. Gypsum plaster provides a smooth interior finish for sealing walls and it is an ideal background for good quality paints and wallpaper finishes. Gypsum plaster is an anti-fungus plaster and it does not get affected by any insects. Gypsum plaster can be applied on smooth as well as a rough surface. The Thickness of cement plaster may vary and it depends on the surfaces to be covered and its plumb and texture. She leads Estimation and Tendering Department of SDCPL. In case of cement plastered room, space looks smaller and an attractive as it is a dark grey colour. Again it cannot be used in wet areas like a toilet, bath, kitchen, wash area, etc. Cement plaster is made by mixing cement, sand, and water, usually, the ratio of cement and sand is 1:4. Lime vs gypsum plaster? Cement Plaster. This material can be applied over block, brick or concrete surface to form a smooth surface. Gypsum plaster is the perfect rust preventive agent and also in inhibit corrosion of electric metal, fitting. but in the case of gypsum plaster keeping is not required we can directly apply the paint. Because gypsum plaster should not be exposed to water or severe moisture conditions, it is usually restricted to interior use. 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. U.S.G. It is ready to use and does not need sand. Cement plaster needs an enormous amount of water during its curing period. Metal lathing embedded in gypsum plaster will not corrode or rust and serves durable and long life. no issues with gypsum plaster. Various surface textures and surface hardness can be obtained. The sand and cement are mixed at the site in different ratios. The density of gypsum plaster is less as compared to cement plaster gypsum plaster is light in weight. Plaster tyPes There are many different types of plaster. Wastage: High level of wastage is observed in using sand cement plaster due to improper handling of material. Further most of cracking happens due to shrinkage, which is quite common. Gypsum plaster is cheaper as compared to cement plaster. Cement plaster is not considered as save from fungus malts et cetera. 1 Pottery Plaster. Gypsum Plaster. Percentage of wastage is higher during application. This is net savings of 24 days of construction time. It has more or less same acoustics properties. While during the application of gypsum plaster the wastage is nominal. In the event of fire cement plaster becomes brittle and cracks and loses the bond with the wall. The mixture of the sand and cement is to be done on site in different ratios. What's the best plaster to use? They pose no health hazards and are therefore frequently specified in hospitals and clinics. 3.2 INSTALLATION, GYPSUM VENEER PLASTER A. Red Top® Brand Keenes Cement: Is retemperable; can be floated for an extended time period to provide a dense finish Gypsum Vs Cement: Which One’s The Best Plastering Material? Difference between cement plaster and gypsum plaster is as follows: Thanks for reading this article. – Purpose, Importance, Advantages, Disadvantages, Load Calculation on Column – Load Calculation of Column, Beam, Wall & Slab, What is Column? The gypsum has a relatively large internal surface The room space looks large and beautiful as gypsum plaster is pure white in colour. Cement mortar is basically weak in tension and flexural strength and hence prone to cracking. 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. In the case of cement plaster, we need pop punning on the plastered surface to receive paint. Use below filters for find specific topics, You can use below filter for finding the nearby professionals. October 14, 2018 at 2:41 pm. Good quality gypsum is not available everywhere and hence costly. It is used on both surfaces internal as well as external. Development of shrinkage cracks is quite frequent in cement plaster. Performance – Durability, light weight (Reduces dead load on structure) 5. Rate of one bag Elite – 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 that’s why we have to deduct the percentage of GST. 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. For underside of the RCC ceiling/ roof, thickness of plaster is generally 10 to 12 mm. Lime and portland cement plaster maybe used both internally and externally. – Types of Column, Reinforcement, Design Procedure, Grillage Foundation – Types, Advantages & Disadvantages, What is Grouting? Substrates Substrates can be either metal lath, unit masonry, monolithic concrete, or a recommended gypsum base, cement board or gypsum fiber panel. 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 … Gypsum plaster is costlier than cement plaster for same thickness. What is plastic? Percentage of wastage is nominal during application. Cement plaster can be used in exterior and interior surfaces. The application of cement plaster is time-consuming process hence increases the project cost. NKV Gypsum requires no curing & no wastage of water Sand Cement Plaster needs curing for 8 - 10 days at least 2 times a day 4 After drying for about 3- 4 days, the surface can be directly painted. Electricity Cost: The cost of electricity used to mix sand and cement is also not considered in the equation. In cement plaster minimum 24-hour interval between two quotes of cement plaster. Gypsum Plaster with adequate initial and final setting time improves workability and provides a ready paintable surface within 3-4 days. In the event of a fire, it acts as a barrier and will protect the blockwork, concrete and steel. She is also a blogger at gharpedia.com. It is used only in internal walls and ceilings. Whytal plaster is produced as a result of calcinations of the raw gypsum in an automatic kettle under controlled temperature. Rendering is used to coat exterior surfaces of buildings and contains a higher percentage of cement within its composition. foot) Absor ption Capa city #1 POTTERY PLASTER 70 14-24 2,400 .36% 99 69 36% # 1 MOULDING PLASTER … gypsum, lime, and portland cement. 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. The application of cement plaster is a time-consuming process, hence increases the project cost. DISCLAIMER: National Gypsum Company Guide Specifications have been written as an aid to the professionally qualified specifier and design professional. Nowadays it is also available in Ready-made packages. Cement plaster is made with cement, sand, water and a suitable plaster. It is proof of durability and performance of gypsum plaster. Rendering. Setting period of cement plaster vs gypsum plaster. Cement when set is much harder and generally used in the construction industry . 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. It has more or less same thermal conductivity as gypsum. High productivity – faster work (Reducing plastering time by 70% when compared to conventional Sand cement plaster + POP method) so time saving 4. Sthapati Designers & Consultants Pvt. Different types of plaster are used in different ways within ceramics. Cement consists mainly of limestone and clay . Gypsum plaster is also advisable where river sand/natural sand is not easily available for the construction. This is generally done and controlled by mostly unskilled labour and hence not likely to be accurate and perfect. Nonetheless, plaster and render are both made from the same building materials of cement, sand, water and lime gypsum. Gypsum plaster is pre-mixed and available in easy to handle bags. Pre-Curing and Post-Curing are necessary for cement sand plaster. Minimum Twenty-four-hour interval between coats of interior Portland cement plaster. In gypsum plaster, gypsum is used as a binding material instead of Portland cement. whereas In the case of gypsum plaster instead of Portland cement gypsum is used and it doesn’t need sand. Benefits Of Gypsum Plaster FOR BUILDERS & DEVELOPERS: 1. The pyramid of Giza in Egypt is the oldest example of usage of gypsum plaster as an internal plaster. Preparing and filling mixed wall surfaces using gypsum based plaster, presumably lime based plaster and smoothed concrete/cement. Shrinkage crack free surfaces - smooth finish 3. Save my name, email, and website in this browser for the next time I comment. Only addition of water is required. – Know More! 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. They all aim at making construction faster and delivering higher and better performance. Pipes etc. Disadvantages of Gypsum Plaster. It can be applied on smooth as well rough surfaces. Also as people are familiar with the cement mortar, a normal mason can easily handle it too. Gypsum plaster is advisable when compared to cement plaster as it gives better-desired finish and performance. Cement plaster is not considered as save from fungus malts et cetera. 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. Setting time of gypsum plaster can be controlled. 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. Setting of Gypsum Plaster: The hydration process occurring in the paste causes the setting of the plaster and thereby develops its strength. She gained her BE in Civil Engineering Degree in 2013. Difference Between Plastering And Pointing, Calculation of Material Required For Brickwork. 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. After a 48-hours period finished coat plaster may be applied to interior cement base coats. sand cement plastering & POP punning. 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. When mixed with lime, its highly calcined, "dead-burned" white gypsum plaster produces durable, highly crack-resistant, smooth- and sand-float finishes. Gypsum plaster is costlier than cement plaster for same thickness. 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. Sand-cement plaster is mixed at site in various proportions (4:1 or 5:1) to arrive at desired strength. Gypsum plaster is light in weight and total strength is achieved in air. But in case of fire gypsum plaster acts as a barrier and protect the blockwork and concrete and steel. WHAT IS THE STRENGTH OF GYPSUM PLASTER VS. CEMENT PLASTER. Out of many skim mixtures, the widely used mixture is made up of lime putty and sugar sand. Know the Difference Between Cement and Concrete. May 17, 2018 at 10:23 am. Gypsum plaster provides a smooth interior finish for ceiling, walls and is ideal back ground for good quality paints and wallpaper finishes. Copyright 2020 GharPedia. 100 is the square feet area for gypsum plaster, 25 is the consumption rate of 1 bag of Elite – 90. Plastics are nothing but synthetic organic high... What is BOQ? In the case of cement plaster pre-curing and post-curing is required. Wall Tiles and Floor Tiles: What is the Difference? Cement plaster is comparative gives a rough finish. Ltd. Nowadays river sand availability is a major problem and rivers and has become costly hence cement plaster is costlier than gypsum 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. The most common types of plaster mainly contain either gypsum, lime, or cement, but all work in a similar way. When dry gypsum powder is mixed with water it gets hardened. K Shiva prasad. Skimming. Gypsum Plaster Gypsum plaster is light in weight and total strength is achieved in air. Although it is slightly softer than stucco, it will still hold up for more years than you can count. Gypsum plaster requires no water curing and should be permitted to dry out as quickly as possible. Plaster is a gypsum based product that looks wonderful in your home or office. DOES IT FALL OF EASILY IF STUCK BY SHARP OBJECT OR HAMMER BY MISTAKE. How to Calculate Quantity of Material For Plastering? Gypsum plaster is not suitable for exterior finish, as it can not be used in damp situations. Tanvi Lad is a Senior Manager (Civil). 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