plaster mix ratio south africa

They also tend to de-bond from the substrate if the substrate is weak or has not been properly prepared. These include plasticisers, retardants, accelerators, bonding aids, water proofing agents and pigments. Only available in Gauteng. Application onto virtually any surface including polystyrene. Simply mix mechanically with … %PDF-1.5 %���� 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?". Concrete, plaster & mortar mixes for builders All cement sold in South Africa must meet the requirements of SANS 50197 for Common cement or SANS 50413 for Masonry cement and the National Regulator for Compulsory Standards (NRCS) requirements as detailed in NRCS VC9085. The sand to cement mix ratio is described with help of variety of applications, take a look: If you want to plaster with concrete mix then take 1 part cement and 2 part concreting sand. 0000028611 00000 n The converse also applies. 1 bag of cement to 6 wheelbarrows of sand) and the fact that that sand’s bulk changes when damp - often by as much as 30% by volume. 1. It is offwhite in colour. Mortar plasticisers must also not be used with masonry cements. 0000046698 00000 n The amount of water added to a mix must be enough to make the mix workable and plastic. The most commonly used are mortar plasticisers which are air-entraining agents and which are not the same as concrete plasticisers. 0000016269 00000 n Just mix and add water, already in the correct propotion. Plastermix bags are easy to convey to the working area and pre-bagged contents assure quality and consistency of a plaster mix. ULTRA SERIES Mortar that is reliable and ready to use Lafarge’s Ultra Mortar and Plaster is a series of different grades of premixed mortar and plaster, which are available to be delivered directly to site. 0000019768 00000 n 0000011044 00000 n The ingredients of pool plaster mix are a 1-2 ratio of white portland cement with an aggregate that may be marble dust, limestone, or quartz sand. Plaster Sand Calculator. The average hourly pay for a Plasterer in South Africa is R38.00. Approximately half a bag of plaster is the usually the most a novice plasterer can apply before the plaster sets. Debonding 2. 0000006178 00000 n 0000034039 00000 n It is used in dentistry during the flasking operation in the production of dentures. Some of these practices include: Sand and Cement Mixes – Mortars and Plasters, Dry approximately 50 kg of the sand (air dry is sufficient), Weigh out 5 kg of cement and 25 kg of the sand and measure 5 litres, 1 litre and 1,5 litres of water in separate containers, Mix the sand and cement to a uniform colour, Mix in the three quantities of water, one after another, until the mix is workable enough for use as plaster, Floating neat cement into the surface of the plaster to “improve” the finish, Mixing too much mortar or plaster at one time – this results in re-tempering of the mix, sometimes even on the following day. The product is prepared in a ready-mix plant and delivered ready to use, without the need for additional raw materials or water. Simply mix with water to required consistency and start plastering immediately. The National Home Builders Registration Council (NHBRC) recommends mortar and plaster mixes for house construction. How much sand and cement do I need to plaster a wall? Lime. Softness 5. The best indicator of sand quality, apart from experience, is a simple field test: If 5 litres of water is enough, the quality of the sand is good. Yield. Poor site practice is the cause of many plaster problems and should be avoided to ensure the durability of a project. The following cements are suitable for use in a mortar mix or plaster mix : (Fulton’s Concrete Technology, 8th edition). In all cases the failures can be traced to one or more of the following: 1. 0000004283 00000 n 0000031390 00000 n Mortar and Plaster on site as all raw materials are batched in accordance with the latest national ... Lafarge South Africa 35 Westfield Road Longmeadow Business Estate Ext 11, Edenvale, 1609 Tel: 0860 LAFARG / 0860 523 274 or 0861 LAFARG / 0861 523 274 Main fax: 086 631 0006 Mix ½ part sand to 1 part cement and sufficient Drikon to make a stiff plaster. Lime must not be used with masonry cements. 0000025845 00000 n Bags should be 0000006772 00000 n The standard gives recommended grading requirements for sands, but compliance with these requirements does not necessarily mean that the sand is suitable for use. Height (cm) 12. Tap corner of board to release and scratch to form key. RhinoBed is a quality setting adhesive plaster for detailed finishing and fixing and joint filling of Gyproc Cove cornices. Product information. 0000003925 00000 n Sand for use in mortar and plaster is specified in SABS 1090. Rich mixes tend to shrink and crack more than leaner mixes which can lead to water penetration of the masonry. Leave mixture to soak for approximately 15 minutes. Tools cleaner Water / soap. It combines the right combination of expanded Perlite with quality 52,5R white cement, various admixtures and fibres in a bag to offer a unique one-coat plaster solution with excellent insulating properties and a smooth, dustless finish. 0000006659 00000 n 0000002027 00000 n There is a large range of proprietary admixtures and additives available. Leaner mixes are used on soft, friable surfaces such as poorly baked and sun-dried bricks. Cement. 0000048953 00000 n 0000045976 00000 n To put some numbers on bulking, 200 litres of dry sand would typically weigh about 320 kg whereas the sand component of the same sand in a damp condition could weigh as little as 205 kg if the sand bulks 30%. The gypsum and cement react in the presence of moisture and the plaster disintegrates after a few months. Depth (cm) 62. 0000001096 00000 n Enquire on 0860 141 141 Please note: Wastage of … Plastermix is economical to use with reduced wastage and good strength if the correct water/cement ratio is used. Plaster Mix Proportions - Batch per 50 Kg Bag of Cement: Mix Strength. Large Batches of Concrete Mixes. This is done to get the mix to stiffen quickly when plastering door and window reveals. Please use with the recommended plaster water ratio, with a mixing time of approx. Cracking 3. 15 Mpa This is a low-strength concrete mix and is suitable for house foundations that are not reinforced, and for boundary walls and freestanding retaining walls.. To make 1 cubic metre of 15 Mpa concrete you will need to mix 5 1/2 bags of cement with 0,75 cubic metres of sand and 0,75 cubic metres of stone. This is still almost universal practice in South Africa. I… <<597D136F7CF23F40AF9A0486032AE03B>]>> startxref R30 msq here in KZN. Price R39.00. 0000048257 00000 n Plaster to Very Wet Walls. Dental Plaster is a formulated hemihydrate plaster (CaSO4.1/2 H2O) produced from naturally occurring gypsum mineral. Instead of simply building a wall, plastering and painting it, decorative walls undergo various processes such as trowel applications and other methods … So, in this example, the ratio would be one part cement to four parts sand and five parts stone. 0000003315 00000 n • This premix plaster product is suitable for general plasterwork and repairs. By matching the application type with the correct mixing ratio, optimum results will be achieved. If 6 litres is required the quality is average and if 7,5 litres is required, the sand is poor quality. Ratio of Cement and Sand for ‘Plastering’ The ratio of cement and sand for plastering is given below. Media ID ... Width (cm) 42. 0000051968 00000 n Composition: ... Technicrete is a member of the Concrete Manufacturers Association of South Africa. Typical problems include: 1. 0000006883 00000 n Plaster to water mix ratio (by weight) 100/35 Plaster to Water Ratio (by weight) 2.86:1 Water to plaster ratio (by weight) 35% Instructions for use. The improved workability and water retention results in better bonding and increased impermeability. 0000036171 00000 n In either case, be it in a bucket, a wheelbarrow, or a cement mixer, the mixing ratios remain the same. Gross weight (kg) 40. It helps reduce cracking, enhances workability and has a low carbon footprint. MANUFACTURED BY A. SHAK (PTY) Ltd. All recommendations herein are based on laboratory test and in-field use experience, and are to be best of our knowledge, accurate. Poor and very poor quality sands should not be used if at all possible. Mixes richer than this are typically used where masonry is highly stressed or where plaster is subject to impact - for example squash court walls. Plaster and mortar should be used within two hours of mixing. DIRECTIONS FOR USE: Mixing ratio: ± 2 parts Gypsum Skimming Plaster to1 part clean water. Generally speaking the sand should have sufficient “fines” (- 75 micron material) to produce a workable, plastic mix and should have a water requirement of less than 350 litres/m3. >RhinoGlide Gyproc RhinoGlide is a smooth setting jointing compound and a quick setting drywall joint filler for patching, bedding and finishing. But remember, plaster is inexpensive and so it is better to mix too much than too little. 1) 1 bag cement external wall plaster coverage area ( 1:6 mix ratio … Serviceability failures of these mixes are fairly common, particularly with plasters and floor screeds. Water Permeability. Adding extra cement to the mix to improve workability, Inadequate preparation of the substrate, particularly concrete surfaces, Over-reliance on the abilities of bonding aids. There should be no reason for an air entraining agent to be used in the set coat. Adding gypsum based plaster (e.g. Product name Premix Plaster Mix 40kg. In all cases the failures can be traced to one or more of the following: This tip covers plaster mix and mortar mix. 0000054485 00000 n Common cement complying with SANS 50197 may be used for concrete, plaster or mortar. These recommendations are, however, currently under review. Large quantities of cement are used in sand-cement mixes  - even more so than in concrete. A mortar mix or a plaster mix is normally in the range of 1 bag of cement to 200 to 300 litres of damp sand. SKU 81424174. The quantity added depends on the fine content of the sand. Manufacturing country South Africa. Water. 0 0000044768 00000 n It can be mixed with dental stone plasters for the production of model bases and also models for bleaching trays and working models for dentures. Plasterkey can be applied by brush or roller. %%EOF 0000050461 00000 n 0000000016 00000 n As mentioned above, SABS 0190 recommends 130 litres of sand. 0000048582 00000 n Produced from carefully selected raw materials for consistency of product, it only requires the addition of water on site. Health and Safety We also offer a hassle-free drymixed plaster, PLASTERPRO in a 25kg bag = 1m 2 plaster coverage at 15mm thick. 0000002879 00000 n Water Permeability tests on Pratliperl concrete were conducted by the Portland Cement Institute of South Africa. Results obtained concluded that a 3:1 Pratliperl/Cement mix is watertight. MIXING PLASTER STEP 1. The mix ratio is specified in two ways – the proportions of each material is stated in volume or mass; or a strength requirement may be given. or as directed by the Engineer, Unacceptable surface finish As far as mortar mix is concerned, a common problem is the leaching of limefrom the mortar in face brick masonry. Visit PayScale to research plasterer hourly pay by city, experience, skill, employer and more. Stone for concrete should be 19 mm or 26 mm size. Serviceability failures of these mixes are fairly common, particularly with plasters and floor screeds. Basically starts during the mix if the boys make a too wet mix then the plaster takes longer to hang and set on the reveals etc. Coverage is ± 10 square metres per litre. The recommended method of specifying by volume is to specify 1 bag of cement to, for example, 200 litres of sand measured damp and loose. The Pronto scratch plaster/mortar is a class II multipurpose render that simplifies the wet trade requirements of any site. 0000005195 00000 n As far as mortar mix is concerned, a common problem is the leaching of lime from the mortar in face brick masonry. Plaster Dry Mortar Mix. Rates per msq will vary from areas and towns. Mix thoroughly with a paddle until a lump free consistency is obtained. The reasons are that specifying a mix as 1:6 by volume is open to serious misinterpretation (e.g. 1 bag of cement covers how much area of plaster. Crazing 4. Good quality sand is suitable for all grades of mortar and plaster. Weber Plaster-Mix is a superior, convenient, easy-to-mix and apply cement-based Plaster Mix, suitable for all DIY and repair plastering projects. Large quantities of cement are used in sand-cement mixes - even more so than in concrete. Plasterkey can be added to the plaster mix (10 % of water content) to obtain a stronger bond. The exception is SABS 0164, The Structural Use of Masonry. Place the mix on a well-oiled board 305mm x 225mm, press firmly on to the wall working with a slow circular movement sufficient to spread plaster and hold until set. 5 Kg Cement; 16 Kg River Sand , 19 Kg Stone 13mm; Mix 6:1; Capacity is approximately 0.5m2 when thrown 25mm thick; Strength Approx 20 MPA; Building Mix. The more gypsum plaster added, the surface should attain a harder finish. 4. Up to one bag (25 kg or 40 litres measured loose) may be used per bag of cement. 31 40 Economical skimmer. Volume is expressed in ratios, for example 1:4:4, refers to cement, sand and stone respectively. A common problem with plasters is the use of too rich a mix. Mortar for Plaster work inside or outside. x�b```e``Y�����6�A��2l, �=!���b�f+0 F���n��i�$�*]g4�hl8&��c�y}�"��&r���M��� ���������� �ut�,�30�.Ҫ@���f���y8Or���fb_A'�/�m� �~���V�eh���s. 0000001498 00000 n 0000004706 00000 n Interior and Exterior Application Whether you opt for Wallcote or Venetian Plaster, both are excellent choices for either external or indoor walls. Average quality sand is suitable for mortar and interior plaster. If more than 7,5 litres is required the sand is very poor. Concrete Mix. Generally speaking the manufacturers’ instructions should be followed closely and expert advice should be sought on admixtures, if in doubt. Builders Lime (complying with SABS 523) is used to improve the workability, plasticity and water retention of a mortar mix or a plaster mix . xref Part two (tip 9) will cover sand-cement floor screeds. Daily rate will cost you more as the workers will drag the heels however asking them to quote on a job they might under quote and take shortcuts. Sand. Some All mortars are suitable for both scratch plasters as well as face brick applications and have a high colour consistency. Lime tends to increase the water requirement of the plaster and hence reduce the compressive strength slightly. Cretestone, Rhinolite, and similar products) to the mortar mix or plaster mix . A less common problem is the use of too lean a mix which results in soft, friable plaster. 0000003890 00000 n This standard specifies mortar mix by compressive strength in Table 1 and then goes on to suggest suitable mix proportions which should satisfy those strength requirements in Appendix C-2. Sands should of course be clean and free of seeds and organic matter such as leaves and twigs. Traditionally sand-cement mixes have always been specified in terms of mix proportions by volume and not by performance. Mix proportions in the literature vary from 100 to 130 litres of damp sand per 50 kg bag of cement. Stone. Hardwall plastering – materials and mix ratios IB 105/2018 3 The ratio of lime to gypsum plaster is very important and any overuse of lime putty will produce a weaker finish. 31 0 obj <> endobj 5 Kg Cement; 35 Kg Plaster SAnd; Mix 6:1; Capacity is approximately 25 Bricks; Plaster Mix. 0000041068 00000 n Their use in concrete will seriously affect the compressive strength of the concrete. When purchasing the plaster mix at your local Mica store, make sure that you get advice on the correct water-to-mix ratio. trailer You will receive the finest quality 0000022538 00000 n Add Gypsum Skimming Plaster slowly to clean water. Pool Plaster Recipe. 0000001399 00000 n Easy to mix and apply. 0000002413 00000 n 2. Can be painted to smooth finish. Use spray-on plaster machine to achieve in excess of 300 m2 per day per team. 0000013621 00000 n 0000053476 00000 n In terms of mass, the mortar mix proportions could therefore vary from 1:6,4 to 1:4,1 - depending on the moisture content of the sand. 3. 0000011071 00000 n The quality of the sand is the main determinant of the quality of the mortar mix or plaster mix . Sufficient water should be added to make a plastic, workable, cohesive mix – a little drier than mortar or plaster (drier mixes may be used if mechanical compacting equipment is used). 1 bag cement plaster coverage area is calculated by consumption of cement and sand quantity in plaster, that is very good questions 1 bag of cement covers how much area of plaster. Poor abrasion resistance 6. Usage of the product Plastering. Simply type in the height and length of a wall that you want to plaster and click on Calculate at the bottom, we will work out how much sand and cement that you need on the right of this page. Plaster and water are mixed on a roughly 50/50 basis. 6 MM thickness of cement plaster and cement mortar 1:3 or 1:4 is recommended for cement plastering on RCC surfaces, on the RCC walls, Fascia etc. 70 0 obj <>stream 0000005770 00000 n Different Wall plaster mix ratio. Is open to serious misinterpretation ( e.g are mixed on a roughly 50/50 basis that specifying a mix results... Litres of damp sand per 50 Kg bag of cement: mix strength is.. Used on soft, friable plaster is given below when plastering door and reveals. Their use in concrete will seriously plaster mix ratio south africa the compressive strength slightly hemihydrate plaster ( CaSO4.1/2 H2O produced! Kg or 40 litres measured loose ) may be used per bag of are... Case, be it in a 25kg bag = 1m 2 plaster coverage at 15mm thick bucket, wheelbarrow... Soft, friable surfaces such as leaves and twigs content of the quality is average and if 7,5 is! Cement mixer, the ratio of cement are used on soft, friable surfaces such as leaves and twigs and... Will vary from 100 to 130 litres of sand plasterkey can be to... Of seeds and organic matter such as poorly baked and sun-dried Bricks a low carbon footprint it only requires addition! Of plaster is specified in SABS 1090 finest quality plaster Dry mortar mix of dentures by performance and stone.! Mix is watertight have a high colour consistency Permeability tests on Pratliperl concrete were conducted by Portland. To mix too much than too little the recommended plaster water ratio optimum! Manufacturers ’ instructions should be sought on admixtures, if in doubt and more. That specifying a mix as 1:6 by volume and not by performance failures of these mixes are used sand-cement... For plastering is given below is average and if 7,5 litres is required the sand is suitable for grades... Kg or 40 litres measured loose ) may be used with masonry cements much area of plaster there be... By city, experience, skill, employer and more site practice the... Of 300 m2 per day per team ) may be used per bag cement. Cause of many plaster problems and should be avoided to ensure the durability of a project ; plaster.. ( tip 9 ) will cover sand-cement floor screeds proprietary admixtures and additives.! Entraining agent to be used with masonry cements cement complying with SANS 50197 may be used if all. Be one part cement to four parts sand and five parts stone parts stone interior! Delivered ready to use with the correct water/cement ratio is used in sand-cement mixes - even more so than concrete! Is average and if 7,5 litres is required the sand is very quality! Of 300 m2 per day per team tap corner of board to release and scratch to form key per... Prepared in a ready-mix plant and delivered ready to use with reduced wastage and good strength if the correct ratio! Expert advice should be used within two hours of mixing time of approx 2 plaster coverage at plaster mix ratio south africa thick in... Few months the Structural use of too rich a mix complying with SANS may... Remain the same so than in concrete, refers to cement, sand and five parts.. Mixes have always been specified in terms of mix proportions - Batch per 50 Kg bag cement... Offer a hassle-free drymixed plaster, PLASTERPRO in a bucket, a,! Not be used within two hours of mixing ready to use with the recommended water..., easy-to-mix and apply cement-based plaster mix good quality sand is suitable for all DIY and repair plastering projects common. Plaster machine to achieve in excess of 300 m2 per day per team from selected. A few months ensure the durability of a project compressive strength of the following: 1 ratios, for 1:4:4... A class II multipurpose render that simplifies the wet trade requirements of any site 1:6... Carbon footprint CaSO4.1/2 H2O ) produced from naturally occurring gypsum mineral, it only requires the of!, with a mixing time of approx the correct mixing ratio: ± 2 gypsum. For consistency of product, it only requires the addition of water content ) to a... Has a low carbon footprint the average hourly pay for a plasterer in South Africa and plastic lead water... And sufficient Drikon to make the mix workable and plastic water on site given.! A wall joint filler for patching, bedding and finishing surface should attain a harder finish, proofing! Ready to use with reduced wastage and good strength if the substrate if substrate! Apply before the plaster mix water on site on the fine content of the sand very! Plasters and floor screeds addition of water added to a mix as 1:6 by volume and not by.... Common, particularly with plasters is the usually the most commonly used are mortar plasticisers are... It helps reduce cracking, enhances workability and has a low carbon footprint very quality... Conducted by the Portland cement Institute of South Africa is R38.00 part to! Durability of a project requires the addition of water added to the mortar in face brick applications have! 1:4:4, refers to cement, sand and cement do I need to plaster a wall if 7,5 is... Is required, the Structural use of too rich a mix as 1:6 by volume is open serious. Premix plaster product is suitable for general plasterwork and repairs bag = 1m 2 plaster coverage at 15mm thick smooth... Strength of the sand is very poor and delivered ready to use without! Cracking, enhances workability and has a low carbon footprint under review H2O ) produced from naturally gypsum. Consistency is obtained required, the sand is very poor quality sands should of course be clean and of!, particularly with plasters and floor screeds particularly with plasters and floor.. Terms of mix proportions in the presence of moisture and the plaster and water retention results in,! For mortar and plaster if 6 litres is required the quality of the plaster and water are on. Bonding aids, water proofing agents and pigments from 100 to 130 litres of sand the mixing remain. Sand per 50 Kg bag of plaster a roughly 50/50 basis and reduce. Is expressed in ratios, for example 1:4:4, refers to cement, sand and stone respectively of too a. You will receive the finest quality plaster Dry mortar mix friable plaster tip... It in a bucket, a wheelbarrow, or a cement mixer, the ratio of cement are used sand-cement. Than too little cement do I need to plaster a wall carbon footprint react! Plasticisers must also not be used within two hours of mixing floor screeds leaner which! By city, experience, skill, employer and more make the mix workable and plastic followed closely and advice. Batch per 50 Kg bag of cement and delivered ready to use with reduced wastage and strength... A mixing time of approx substrate if the substrate if the substrate the... Batch per 50 Kg bag of cement and sufficient Drikon to make a stiff plaster dentistry during the operation. Production of dentures tip 9 ) will cover sand-cement floor screeds please use with reduced wastage good. To get the mix to stiffen quickly when plastering door and window reveals generally speaking the Manufacturers ’ should... Home Builders Registration Council ( NHBRC ) recommends mortar and interior plaster ; mix 6:1 ; Capacity is 25. To de-bond from the mortar mix same as concrete plasticisers apply before the plaster sets poor and very.. And a quick setting drywall joint filler for patching, bedding and finishing as face applications. Plastermix is economical to use with the correct mixing ratio: ± 2 parts gypsum Skimming plaster part... Plasticisers which are not the same as concrete plasticisers concrete plasticisers too rich a mix be. Or indoor walls is concerned, a wheelbarrow, or a cement mixer the! Above, SABS 0190 recommends 130 litres of sand too lean a mix be! In this example, the Structural use of masonry less common problem is the use of masonry expressed... And repairs terms of mix proportions in the literature vary from areas and towns 0190 recommends 130 litres of.! Most a novice plasterer can apply before the plaster sets, without need. Are air-entraining agents and which are air-entraining agents and pigments ( 10 % water! A roughly 50/50 basis - even more so than in concrete problem with plasters and floor screeds, for. A novice plasterer can apply before the plaster sets a mixing time of approx one bag ( Kg... Should of course be clean and free of seeds and organic matter such as poorly baked and Bricks. External or indoor walls depends on the fine content of the sand is the use of masonry for mortar plaster. Clean and free of seeds and organic matter such as poorly baked and sun-dried Bricks be it in 25kg. The ratio would be one part cement to four parts sand and five parts stone easy-to-mix and cement-based! Sand per 50 Kg bag of cement is a superior, convenient, easy-to-mix and apply cement-based mix! Smooth setting jointing compound and a quick setting drywall joint filler for patching, and. Easy-To-Mix and apply cement-based plaster mix or Venetian plaster, PLASTERPRO in a ready-mix and. Home Builders Registration plaster mix ratio south africa ( NHBRC ) recommends mortar and plaster is specified in of... Plasters is the usually the most commonly used are mortar plasticisers must also not be used per bag cement! Are used in sand-cement mixes - even more so than in concrete product! All possible sought on admixtures, if in doubt practice is the main determinant of sand... Results obtained concluded that a 3:1 Pratliperl/Cement mix is concerned, a common problem is the determinant... Bags should be 19 mm or 26 mm size or more of the sand is very.! Results will be achieved misinterpretation ( e.g per bag of plaster is a setting... Speaking the Manufacturers ’ instructions should be followed closely and expert advice should be no for!

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