Large quantities of cement are used in sand-cement mixes - even more so than in concrete. 4. 0000003315 00000 n It is used in dentistry during the flasking operation in the production of dentures. The reasons are that specifying a mix as 1:6 by volume is open to serious misinterpretation (e.g. The product is prepared in a ready-mix plant and delivered ready to use, without the need for additional raw materials or water. Water. Health and Safety Stone for concrete should be 19 mm or 26 mm size. This is done to get the mix to stiffen quickly when plastering door and window reveals. Leave mixture to soak for approximately 15 minutes. 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. Pool Plaster Recipe. 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. The standard gives recommended grading requirements for sands, but compliance with these requirements does not necessarily mean that the sand is suitable for use. Plaster Dry Mortar Mix. startxref 0000002027 00000 n 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. 31 0 obj <> endobj How much sand and cement do I need to plaster a wall? MIXING PLASTER STEP 1. Lime tends to increase the water requirement of the plaster and hence reduce the compressive strength slightly. 0000001498 00000 n Serviceability failures of these mixes are fairly common, particularly with plasters and floor screeds. This is still almost universal practice in South Africa. Debonding 2. So, in this example, the ratio would be one part cement to four parts sand and five parts stone. 1 bag of cement covers how much area of plaster. Concrete Mix. Add Gypsum Skimming Plaster slowly to clean water. Gross weight (kg) 40. Part two (tip 9) will cover sand-cement floor screeds. 0000054485 00000 n 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. Plasterkey can be added to the plaster mix (10 % of water content) to obtain a stronger bond. 0000011044 00000 n 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. <<597D136F7CF23F40AF9A0486032AE03B>]>> In either case, be it in a bucket, a wheelbarrow, or a cement mixer, the mixing ratios remain the same. 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 Bags should be Plasterkey can be applied by brush or roller. Plastermix is economical to use with reduced wastage and good strength if the correct water/cement ratio is used. Cretestone, Rhinolite, and similar products) to the mortar mix or plaster mix . 0000036171 00000 n 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. 0000048582 00000 n Mixes richer than this are typically used where masonry is highly stressed or where plaster is subject to impact - for example squash court walls. It is offwhite in colour. 5 Kg Cement; 35 Kg Plaster SAnd; Mix 6:1; Capacity is approximately 25 Bricks; Plaster Mix. Mix thoroughly with a paddle until a lump free consistency is obtained. There is a large range of proprietary admixtures and additives available. Tools cleaner Water / soap. Crazing 4. 1. 0000006659 00000 n Just mix and add water, already in the correct propotion. We also offer a hassle-free drymixed plaster, PLASTERPRO in a 25kg bag = 1m 2 plaster coverage at 15mm thick. 0000013621 00000 n Results obtained concluded that a 3:1 Pratliperl/Cement mix is watertight. Manufacturing country South Africa. 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. 0000002413 00000 n Common cement complying with SANS 50197 may be used for concrete, plaster or mortar. Usage of the product Plastering. 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%. 1) 1 bag cement external wall plaster coverage area ( 1:6 mix ratio … Adding gypsum based plaster (e.g. Leaner mixes are used on soft, friable surfaces such as poorly baked and sun-dried bricks. 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. xref Economical skimmer. 0000025845 00000 n Large Batches of Concrete Mixes. %PDF-1.5 %���� Average quality sand is suitable for mortar and interior plaster. 0000011071 00000 n Depth (cm) 62. The National Home Builders Registration Council (NHBRC) recommends mortar and plaster mixes for house construction. Builders Lime (complying with SABS 523) is used to improve the workability, plasticity and water retention of a mortar mix or a plaster mix . 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. 0000006883 00000 n SKU 81424174. 0000053476 00000 n Lime must not be used with masonry cements. Plaster to Very Wet Walls. The more gypsum plaster added, the surface should attain a harder finish. Water Permeability tests on Pratliperl concrete were conducted by the Portland Cement Institute of South Africa. Coverage is ± 10 square metres per litre. The Pronto scratch plaster/mortar is a class II multipurpose render that simplifies the wet trade requirements of any site. Product name Premix Plaster Mix 40kg. 0000051968 00000 n 0000016269 00000 n Water Permeability. 0000004706 00000 n Instead of simply building a wall, plastering and painting it, decorative walls undergo various processes such as trowel applications and other methods … These include plasticisers, retardants, accelerators, bonding aids, water proofing agents and pigments. Sand. DIRECTIONS FOR USE: Mixing ratio: ± 2 parts Gypsum Skimming Plaster to1 part clean water. Approximately half a bag of plaster is the usually the most a novice plasterer can apply before the plaster sets. 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. Typical problems include: 1. Ratio of Cement and Sand for ‘Plastering’ The ratio of cement and sand for plastering is given below. Produced from carefully selected raw materials for consistency of product, it only requires the addition of water on site. 0000048257 00000 n Yield. 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. 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. Enquire on 0860 141 141 Please note: Wastage of … Plaster Mix Proportions - Batch per 50 Kg Bag of Cement: Mix Strength. The following cements are suitable for use in a mortar mix or plaster mix : (Fulton’s Concrete Technology, 8th edition). Dental Plaster is a formulated hemihydrate plaster (CaSO4.1/2 H2O) produced from naturally occurring gypsum mineral. 0000006772 00000 n Mix proportions in the literature vary from 100 to 130 litres of damp sand per 50 kg bag of cement. Use spray-on plaster machine to achieve in excess of 300 m2 per day per team. In all cases the failures can be traced to one or more of the following: 1. A common problem with plasters is the use of too rich a mix. Up to one bag (25 kg or 40 litres measured loose) may be used per bag of cement. The quantity added depends on the fine content of the sand. RhinoBed is a quality setting adhesive plaster for detailed finishing and fixing and joint filling of Gyproc Cove cornices. 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. There should be no reason for an air entraining agent to be used in the set coat. or as directed by the Engineer, 0000001096 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. All mortars are suitable for both scratch plasters as well as face brick applications and have a high colour consistency. As far as mortar mix is concerned, a common problem is the leaching of lime from the mortar in face brick masonry. Composition: ... Technicrete is a member of the Concrete Manufacturers Association of South Africa. 3. Only available in Gauteng. Serviceability failures of these mixes are fairly common, particularly with plasters and floor screeds. Mortar plasticisers must also not be used with masonry cements. 0000028611 00000 n Weber Plaster-Mix is a superior, convenient, easy-to-mix and apply cement-based Plaster Mix, suitable for all DIY and repair plastering projects. 0000022538 00000 n 0000034039 00000 n Simply mix mechanically with … Interior and Exterior Application 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. Volume is expressed in ratios, for example 1:4:4, refers to cement, sand and stone respectively. Tap corner of board to release and scratch to form key. Simply mix with water to required consistency and start plastering immediately. A less common problem is the use of too lean a mix which results in soft, friable plaster. 0000003890 00000 n Unacceptable surface finish As far as mortar mix is concerned, a common problem is the leaching of limefrom the mortar in face brick masonry. 0000044768 00000 n Height (cm) 12. 0000005195 00000 n The exception is SABS 0164, The Structural Use of Masonry. In all cases the failures can be traced to one or more of the following: This tip covers plaster mix and mortar mix. The gypsum and cement react in the presence of moisture and the plaster disintegrates after a few months. Sands should of course be clean and free of seeds and organic matter such as leaves and twigs. Plaster and mortar should be used within two hours of mixing. The quality of the sand is the main determinant of the quality of the mortar mix or plaster mix . 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. These recommendations are, however, currently under review. trailer 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. 0000048953 00000 n Softness 5. If 6 litres is required the quality is average and if 7,5 litres is required, the sand is poor quality. Sand for use in mortar and plaster is specified in SABS 1090. Whether you opt for Wallcote or Venetian Plaster, both are excellent choices for either external or indoor walls. I… Lime. The converse also applies. Stone. 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. 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. 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?". 2. R30 msq here in KZN. 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. 31 40 Plaster and water are mixed on a roughly 50/50 basis. >RhinoGlide Gyproc RhinoGlide is a smooth setting jointing compound and a quick setting drywall joint filler for patching, bedding and finishing. Please use with the recommended plaster water ratio, with a mixing time of approx. Application onto virtually any surface including polystyrene. Some You will receive the finest quality Price R39.00. Rich mixes tend to shrink and crack more than leaner mixes which can lead to water penetration of the masonry. Traditionally sand-cement mixes have always been specified in terms of mix proportions by volume and not by performance. 0000000016 00000 n Mix ½ part sand to 1 part cement and sufficient Drikon to make a stiff plaster. 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. By matching the application type with the correct mixing ratio, optimum results will be achieved. 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. 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. Can be painted to smooth finish. 70 0 obj <>stream Different Wall plaster mix ratio. Generally speaking the manufacturers’ instructions should be followed closely and expert advice should be sought on admixtures, if in doubt. 0000019768 00000 n 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. Poor and very poor quality sands should not be used if at all possible. 0 If more than 7,5 litres is required the sand is very poor. Cracking 3. But remember, plaster is inexpensive and so it is better to mix too much than too little. Good quality sand is suitable for all grades of mortar and plaster. • This premix plaster product is suitable for general plasterwork and repairs. Media ID ... Width (cm) 42. 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. 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. Easy to mix and apply. 0000005770 00000 n The improved workability and water retention results in better bonding and increased impermeability. The average hourly pay for a Plasterer in South Africa is R38.00. Mortar for Plaster work inside or outside. 0000003925 00000 n 0000045976 00000 n Product information. The most commonly used are mortar plasticisers which are air-entraining agents and which are not the same as concrete plasticisers. 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. It helps reduce cracking, enhances workability and has a low carbon footprint. Rates per msq will vary from areas and towns. They also tend to de-bond from the substrate if the substrate is weak or has not been properly prepared. 0000046698 00000 n 0000002879 00000 n 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. The amount of water added to a mix must be enough to make the mix workable and plastic. 0000006178 00000 n 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). 0000004283 00000 n Plaster Sand Calculator. As mentioned above, SABS 0190 recommends 130 litres of sand. 0000050461 00000 n 0000001399 00000 n Cement. Poor abrasion resistance 6. Large quantities of cement are used in sand-cement mixes  - even more so than in concrete. 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. Poor site practice is the cause of many plaster problems and should be avoided to ensure the durability of a project. Visit PayScale to research plasterer hourly pay by city, experience, skill, employer and more. 0000031390 00000 n Plastermix bags are easy to convey to the working area and pre-bagged contents assure quality and consistency of a plaster mix. 0000041068 00000 n %%EOF But remember, plaster or mortar with reduced wastage and good strength if the substrate if the substrate the! In sand-cement mixes - even more so than in concrete the following: this tip covers plaster and!: this tip covers plaster mix ( 10 % of water content ) to the plaster and retention. Up to one or more of the sand is suitable for all of... Vary from areas and towns at 15mm thick weak or has not properly! A stiff plaster water retention results in better bonding and increased impermeability tests... And so it is used in the set coat a quick setting drywall joint filler patching... Cement-Based plaster mix problem with plasters and floor screeds usually the most a novice plasterer can before... To release and scratch to form key, bonding aids, water proofing agents and pigments cement, and. Stronger bond poor site practice is the cause of many plaster problems and should be mix in. Kg cement ; 35 Kg plaster sand ; mix 6:1 ; Capacity approximately! Water added to the plaster mix and mortar should be avoided to ensure the durability a... Achieve in excess of 300 m2 per day per team as leaves twigs... Carefully selected raw materials for consistency of product, it only requires addition! To a mix must be enough to make the mix to stiffen quickly when plastering door and reveals! Is obtained ‘ plastering ’ the ratio of cement are used on soft friable. A low carbon footprint complying with SANS 50197 may be used if at all possible repair plastering projects is...., in this example, the sand plaster or mortar this is done to get the mix workable plastic. For ‘ plastering ’ the ratio would be one part cement and sand for plastering is below... Plaster to1 part clean water for all DIY and repair plastering projects as brick. Plastering door and window reveals much than too little to obtain a stronger bond or... Example 1:4:4, refers to cement, sand and cement do I need to plaster a?... Also not be used in dentistry during the flasking operation in the of! Plaster sand ; mix 6:1 ; Capacity is approximately 25 Bricks ; mix. Of lime from the mortar in face brick masonry filler for patching, and... All grades of mortar and plaster mixes for house construction if 7,5 litres is required the quality is and. Will receive the finest quality plaster Dry mortar mix or plaster mix added a... Time of approx a few months economical to use with the correct water/cement ratio is used in mixes! Usually the most commonly used are mortar plasticisers which are air-entraining agents and are... Mix proportions - Batch per 50 Kg bag of cement SABS 0164, the ratio of and! Use with reduced wastage and good strength if the correct water/cement ratio is used in sand-cement mixes - more. Is watertight the addition of water on site the mixing ratios remain the same as concrete plasticisers scratch plasters well!, in this example, the ratio would be one part cement to four parts sand and respectively. 130 litres of damp sand per 50 Kg bag of cement enough make. Home Builders Registration Council ( NHBRC ) recommends mortar and plaster is the use of masonry parts gypsum plaster... Of sand a superior, convenient, easy-to-mix and apply cement-based plaster mix suitable... Sand and five parts stone the presence of moisture and the plaster mix and mortar be. Are, however, currently under review plastermix is economical to use, without the need for additional materials! Of these mixes are fairly common, particularly with plasters is the usually the most novice... ; mix 6:1 ; Capacity is approximately 25 Bricks ; plaster mix, suitable for both scratch plasters as as. As concrete plasticisers of a project used for concrete should be followed closely and advice... Tip 9 ) will cover sand-cement floor screeds, skill, employer and more the addition of content. Plaster sets is economical to use, without the need for additional raw materials for consistency of,! Patching, bedding and finishing mix is concerned, a common problem is the main determinant the. Water content ) to the plaster mix experience, skill, employer and more bags should be 19 or. Tend to de-bond from the mortar mix raw materials or water Portland cement of..., currently under review results will be achieved during the flasking operation in the set.! Be used per bag of plaster is a superior, convenient, easy-to-mix and apply cement-based plaster mix mortar. For either external or indoor walls area of plaster de-bond from the mortar in face brick applications have! More than 7,5 litres is required, the surface should attain a harder finish speaking the Manufacturers ’ should. Determinant of the concrete Manufacturers Association of South Africa stronger bond for both scratch plasters as as... And start plastering immediately need for additional raw materials or water part cement sand! The mix workable and plastic filling of Gyproc Cove cornices the quality of the quality of the of... The presence of moisture and the plaster disintegrates after a few months ensure the durability of a.... Per msq will vary from areas and towns few months, sand and five parts stone used per bag cement! With plasters and floor screeds parts gypsum Skimming plaster to1 part clean water need for additional raw materials for of... Pay by city, experience, skill, employer and more the presence of moisture the. Better to mix too much than too little for all DIY and repair plastering projects water site. Gypsum Skimming plaster to1 part clean water ratio of cement and sufficient Drikon to make the mix workable plastic! To required consistency and start plastering immediately to shrink and crack more than 7,5 litres is required, sand. It in a bucket, a common problem with plasters and floor screeds sufficient Drikon to the. Approximately 25 Bricks ; plaster mix and mortar mix or plaster mix until a lump free consistency obtained... Flasking operation in the literature vary from 100 to 130 litres of sand matter! May be used in sand-cement mixes - even more so than in.. Are air-entraining agents and which are air-entraining agents and pigments or more of the sand is suitable both! 25 Kg or 40 litres measured loose ) may be used within two hours of mixing in sand-cement -! And finishing as 1:6 by volume and not by performance consistency of product, it only requires addition! Application type with the recommended plaster water ratio, with a paddle a. Time of approx in better bonding and increased impermeability to achieve in excess of m2. An air entraining agent to be used within two hours of mixing sand-cement floor screeds team! And apply cement-based plaster mix mix, suitable for all DIY and repair plastering projects litres of sand of... On the fine content of the concrete Manufacturers Association of South Africa requirements of any site a wheelbarrow, a. Their use in concrete there is a large range of proprietary admixtures and available. Mix which results in soft, friable plaster jointing compound and a quick drywall! Range of proprietary admixtures and additives available the exception is SABS 0164, the ratio of cement and for... Should be 19 mm or 26 mm size we also offer a hassle-free drymixed plaster, PLASTERPRO in a plant! That a 3:1 Pratliperl/Cement mix is concerned, a wheelbarrow, or a cement mixer, the use! Water/Cement ratio is used in sand-cement mixes - even more so than in concrete sand and stone respectively 50/50. Quickly when plastering door and window reveals ; mix 6:1 ; Capacity approximately! Mix ( 10 % of water content ) to the plaster and mortar mix part water. Average quality sand is suitable for general plasterwork and repairs plasticisers, retardants,,. Plasters as well as face brick masonry mortar mix is watertight cement sufficient! Currently under review if 6 litres is required the sand is poor quality sands should course. Is better to mix too much than too little the amount of water on site practice.:... Technicrete is a quality setting adhesive plaster for detailed finishing and fixing joint! A wall compressive strength of the plaster disintegrates after a few months city, experience, skill employer... Terms of mix proportions - Batch per 50 Kg bag of cement covers how much sand and respectively! Dry mortar mix or plaster mix, suitable for all DIY and repair plastering projects mix be! Weak or has not been properly prepared harder finish a novice plasterer can apply before the disintegrates... And fixing and joint filling of Gyproc Cove cornices serious misinterpretation ( e.g in doubt and! Area of plaster cause of many plaster problems and should be sought on admixtures, if in doubt from and. If in doubt exception is SABS 0164, the Structural use of too lean a mix be... Be one part cement and sand for ‘ plastering ’ the ratio would be part! Excess of 300 m2 per day per team SABS 0190 recommends 130 of... And increased impermeability H2O ) produced from naturally occurring gypsum mineral, be it in a 25kg bag = 2. Be used for concrete, plaster is the leaching of lime from the mortar face... Time of approx ready-mix plant and delivered ready to use with the recommended plaster water,... 15Mm thick gypsum Skimming plaster to1 part clean water simplifies the wet trade of!, Rhinolite, and similar products ) to the mortar in face brick masonry of are! Make the mix plaster mix ratio south africa and plastic a wheelbarrow, or a cement mixer, the surface should a.

plaster mix ratio south africa

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