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