Heavy-Duty Colored Polyurethane Floor Screed

Transcription

1 Product Data Sheet Edition No. 01 (October 2015) Sikafloor - 20 PurCem Sikafloor - 20 PurCem Heavy-Duty Colored Polyurethane Floor Screed Construction Description Uses Characteristics / Advantages Tests Sikafloor - 20 PurCem is a three part, water based, high strength, colored polyurethane resin floor screed suitable for floors subject to heavy loading, abrasion and chemical exposure. In areas subject to heavy loading, abrasion and high chemical exposure, to provide a 6 to 9 mm thick, hard wearing surface, such as in: n Food process plants n Chemical plants n Processing areas n Laboratories n Workshop n Excellent chemical resistance n High mechanical resistance n High abrasion resistance n Steam cleanable at 9 mm thickness n Thermal resistance n Slip resistance n Easily maintained n Fast curing n Easy to apply n Durable n Jointless n Matt finish Approval/ Standards Conforms to the requirements of EN 13813: 2002 AS CT- C40- F10-AR 0.5 Concerning contact with foodstuffs, it conforms to the requirements of EN1186, EN 13130, and prcen/ts standards, and the Decree on Consumer Goods, representing the conversion of directives 89/109/EEC, 90/128/EEC and 2002/72/EC For contact with food stuffs, according to test report by ISEGA, Registered N U 04, dated January 14th, Test reports from Washington Fire Research Centre WFRC No , dated Jan. 20th, 2005 (BS EN ISO :2002) and WFRC No , dated Jan. 20th, 2005 (BS EN ISO :2002) FOR Fire rating Test report from UKA Aston University, Report N : SA/AR/251004/SF20P dated for Abrasion and Impact Resistance All other values indicated are internal test results. 1 Sikafloor -20 PurCem 1/7

2 Product Data Appearance / Colours Packaging Storage Conditions Shelf-Life Part A: colored liquid Part B: brown liquid Part C: natural grey powder Available colors (all are approximate) : RAL 1001, 1006, 1011, 3009, 3012, 6010, 6011, 7024, 7032, 7035, 7037, 7042, BS 18E51, 18E53, 20C40. Part A+B+C 60.6 kg ready to mix units 12 complete units per pallet (12 x A) + (12X B) + (24 X C) Part A: 5.8 kg plastic drum 1000 kg IBC containers Part B: 4.8 kg plastic jerrycan 225 kg drums Part C: 50.0 kg (2 x 25 kg), plastic lined, double paper bags 6 months from date of production, if stored properly in original, unopened and undamaged sealed packaging, in dry conditions at temperatures between +10 C and +30 C. Part A+B must be protected from frost. Part C must be protected from humidity. Technical Data Chemical Base Water based PU with cementitious aggregate. Density Part A: ~ 1.10kg/l (at +20 C) (DIN EN ISO ) Part B: ~ 1.24kg/l (at +20 C) Part C: ~ 1.80 kg/l (at +20 C) Part A+B+C mixed: ~ 1.90 kg/l (at +20 C) Layer Thickness Thermal Expansion Coefficient 6mm min. / 9 mm max. α 40 x 10 6 per C (ASTM E 381, ASTM D-696, ISO 11359) Temperature range: -20 C to +60 C) Fire Rating Class A2 ( ) (BS EN ) Service Temperature Mechanical/ Physical Properties fl The product is suitable for use when exposed to continuous temperatures of up to +120 C in a 9.0 mm thickness and up to +70 C in 6.0 mm thickness. Compressive Strength > 48 N/mm² after 28 days at +23 C / 50% r. h. (BS EN ) Flexural Strength > 10 N/mm² after 28 days at +23 C / 50% r. h. (BS EN ) Bond Strength > 1.5 N/mm² (failure in concrete) (EN 1542) (1.5 N/mm² is the minimum pull off strength of the recommended concrete substrate) Slip Resistance Slip Resistance Values (BS 8204 Part 2) Substrate SRV Dry SRV Wet Sikafloor - 20 PurCem TRL Pendulum, Rapra 4S Slider Abrasion Resistance Class Special Severe abrasion resistance (BS 8204 Part 2) AR 0.5 (EN 13813:2002 EN ) (Less than 0.05 mm wear depth) 1100 mg (ASTM D ) Taber Abrader H-18 wheel/ 1000 gr/ 1000 cycles 2 Sikafloor -20 PurCem 2/7

3 Impact Resistance Class A (BS 8204 Part 1) (Less than 1 mm indention depth) Resistance Chemical Resistance System Information System Structure Resistant to many chemicals. Please ask for a detailed chemical by steam cleaning When thickness is 9 mm. Use the products mentioned below as indicated in their respective Product Data Sheets. Substrate Priming Systems System 1: moisture control on green concrete: - Primer: Sikafloor W - and Temporary Moisture barrier (TMB): Sikafloor - 81 EpoCem or Sikafloor - 82 EpoCem Layer thickness: from 2 to 3 mm or 3 to 7 mm respectively, and then apply Either System 2 or 3 System 2: moisture content between 4% and 6%: Sikafloor - 155W or Sikafloor - 31 PurCem, either of them fully blinded with quartz sand mm System 3: with moisture content below 4%: Sikafloor - 155W or Sikafloor -156 or Sikafloor for faster curing or Sikafloor - 31 PurCem any of which must be fully blinded with quartz sand mm On porous excessively absorbent substrates use Sikafloor - 155W, in two coats, the first thinned with 10% water. Substrate patching or leveling: - Layer thickness; mm Sikafloor - 155W or Sikafloor or Sikafloor Always make sure primer is tacky but not wet. - Patching/ leveling screed: Sikafloor - 30 PurCem If subsequent Sikafloor - 20/ 21 PurCem screed application is done within 8 to 48 hours, at +20 C, there is no need to prime on top of Sikafloor - 30 PurCem. Heavy duty screed: - Layer thickness: 6-9 mm As indicated above and fully blinded with quartz sand ( mm). - Screed: Sikafloor - 20 PurCem Medium duty screed: - Layer Thickness: 3-6 mm - Primer: As indicated above. - Standard screed: Sikafloor - 21 PurCem or - High slip resistance screed: Sikafloor - 21 PurCem broadcast with quartz sand Sealed with 1-2 coats of Sikafloor -21 PurCem (See build up Slip Resistance in Sikafloor - 21 Purcem PDS) 3 Sikafloor -20 PurCem 3/7

4 Coving and detailing: - Primer: Sikafloor - 155W or Sikafloor or Sikafloor extended with 2% Sika Extender T. Reprime if no longer tacky. - Coving Mortar: Sikafloor - 29 PurCem - Seal coat: 1-2 x Sikafloor - 31 PurCem Note: These system configurations must be fully complied with as described and may not be changed. Application Details Consumption/ Dosage Substrate Quality Substrate Preparation Primer (see System Structure above): ~ kg/m², fully blinded if required with mm quartz sand at 1-2 kg/m² (Consumption may vary depending on substrate conditions) Screed 6-9 mm: Sikafloor² - 20 PurCem (part A+B+C) ~ 2.0 kg/m² / mm layer thickness. This figure is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc. The concrete substrate must be sound and of sufficient compressive strength (minimum 25 N/mm²) with a minimum pull strength of 1.5 N/mm². The substrate must be clean, dry and free of all contaminants such as oil, grease, coatings and surface treatments, etc. If in doubt apply a test area first. Concrete substrates must be prepared mechanically using abrasive blast cleaning or scarifying equipment to remove cement laitance and achieve a profiled open textured surface. Weak concrete must be removed and surface defects such as blow holes and voids must be fully exposed. Repairs to the substrate, filling of blowholes/voids and surface leveling must be carried out using appropriate products from the Sikafloor, Sikadur and Sikagard range of materials. High spots can be removed by grinding. All duct, loose and friable material must be completely removed from all surfaces Before application of the product, preferably by brush and/or vacuum. Application Conditions/ Limitations Substrate Temperature Ambient Temperature Substrate Humidity Relative Air Humidity Dew Point +5 C min. / +30 C max. +5 C min. / +30 C max. 6% pbw Test method: Sika - Tramex meter (up to 6%) or CM-measurement. No rising moisture according to ASTM D 4263 (Polyethylene sheet test). Always confirm substrate moisture content prior to the application of the primer. Refer to System Structure and options for substrate priming. 80% max. Beware of condensation! The substrate and uncured floor must be at least 3 C above dew point to reduce the risk of condensation or blooming on the floor finish. 4 Sikafloor -20 PurCem 4/7

5 Application Instructions Mixing Mixing Time Part A: B: C = 1: 0.83: 8.6 (packaging size = 5.8: 4.8: 50) by weight. Prior to mixing, stir part A (resin) well, then add all of part B (hardener) and mix both liquid parts thoroughly with a low speed electric stirrer for a minimum of one minute until a uniform mix has been achieved. Gradually add part C (aggregate) to the mixed resin pats in the mixer for further 3 minutes minimum, until a uniform moist mix is obtained. Mixing Tools Use a low speed electric stirrer ( rpm) for mixing parts A and B. For preparation of the mortar mix use a pan type revolving mixer. Application Method/ Tools Cleaning of Tools Prior to application, confirm substrate moisture content, r. h. and dew point. If > 6% pbw moisture content, Sikafloor - EpoCem can be applied as T.M.B. (temporary moisture barrier) system. Pour the mixed Sikafloor - 20 PurCem onto the substrate and spread evenly with a rake or trowel to the required level, achieving a flat surface. Finish the material with a steel trowel. A short pile roller can be used once or twice, and always in the same direction, to Provide a more homogeneous finish to the surface. No excessive backroll. Clean all tools and application equipment with Thinner C immediately after use. Hardened/ cured material can only be mechanically removed. Potlife Temperature +10 C +20 C Time ~ 30 minutes ~ 15 minutes +30 C ~ 8 minutes Waiting Time/ Overcoatability Before applying Sikafloor - 20 PurCem on Sikafloor EpoCem allow: +10 C 16 hours 2 days + 20 C 8 hours 2 days + 30 C 4 hours 1 days Before applying Sikafloor - 20 PurCem on Sikafloor W or Sikafloor or Sikafloor or Sikafloor - 31 PurCem (all fully blinded), allow: +10 C 24 hours 12 days + 20 C 12 hours 7 days + 30 C 6 hours 4 days Before applying Sikafloor - 20 PurCem on Sikafloor W or -156 or -157 allow: +10 C 16 hours 48 hours + 20 C 8 hours 24 hours + 30 C 4 hours 12 hours 5 Sikafloor -20 PurCem 5/7

6 Before any subsequent application on Sikafloor - 20 PurCem allow: +10 C 16 hours 48 hours + 20 C 8 hours 24 hours + 30 C 4 hours 12 hours Times are approximate and will be affected be changing ambient and substrate Conditions, particularly temperature and relative humidity. Notes on Application/ Limitations A retaining groove must be placed at exposed edges along of the application area (perimeter, joints, connections, plinths, columns, covings and drains/ gullies) as Indicated in the application details of the system data sheet, to prevent curling during curing. Width and depth must be twice the thickness of the floor finish. Do not apply Sikafloor - 20 PurCem on substrates where significant vapour Pressure may occur. Both Sikafloor - 20 PurCem and Sika Thinner C are flammable. NO NAKED FLAMES. Always ensure good ventilation when using Sikafloor - 20 PurCem in a confined space. Sikafloor - 20 PurCem shares the resin (part A) and hardener (part B) with Sikafloor - 20 PurCem. Make sure the correct pack sizes of aggregate are used. Freshly applied Sikafloor - 20 PurCem must be protected from damp, condensation and water for at least 24 hours. Improved slip resistance can be obtained by broadcasting the surface with Aggregate of suitable granulometry and back rolling with a short pile roller (1-2 Passes only). For the highest hygienic demands, a subsequent top coat of Sikafloor - 20 PurCem may be required. This must be applied within 24 hours after the initial Sikafloor - 20 PurCem application. Curing Details Applied Product ready for use Substrate Temperature Foot traffic Light traffic Full cure +10 C ~ 24 hours ~ 36 hours ~ 10 days +20 C ~ 12 hours ~ 24 hours ~ 7 days +30 C ~ 6 hours ~ 10 hours ~ 3 days Note: Times are approximate and will be affected by changing ambient and substrate conditions. 6 Sikafloor -20 PurCem 6/7

7 Cleaning/ Maintenance Construction Methods Notes Health and Safety Information Protective Measures Ecology Transportation Class Important Notes Toxicity Legal Notice To maintain the appearance of the floor after application, Sikafloor - 20 PurCem must have all spillages removed immediately and must be regularly cleaned using rotary brush, mechanical scrubbers, scrubber dryer, high pressure washer, wash and vacuum techniques etc. using suitable detergents and waxes. All technical data stated in this Product Data Sheet are based on laboratory tests. Actual measured data may vary due to circumstances beyond our control. Please insert any additional Standard Health and Safety Information in accordance with local laws and which are not already stated in the safety data sheet. For questions contact your Ecology and Safety-Manager. During application and curing in closed rooms, pits and shafts etc., adequate fresh air ventilation must be provided. Keep way from open flames including welding. Use of basic principles of industrial hygiene and protective clothing such as gloves and goggles etc. will enable this product to be used safely. Change soiled work clothes and wash hands before eating and after finishing work. Local regulations and health and safety advice on packaging labels must be Observed. Insert local law information (if product not classified, please remove). Insert local law information (if product not classified, please remove). Residues of material must be removed according to local regulations. Fully cured material can be disposed of as household waste under agreement with the responsible local authorities. Detailed health and safety information as well as detailed precautionary measures e.g. physical, toxicological and ecological data can be obtained from the material safety data sheet. Insert local law information (if product not classified, please remove). The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in good faith based on Sika s current knowledge and experience of the products when properly stored, handled and applied under normal conditions in accordance with Sika s recommendations. In practice, the differences in materials, substrates and actual site conditions are such that no warranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The user of the product must test the product s suitability for the intended application and purpose. Sika reserves the right to change the properties of its products. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the most recent issue of the local Product Data Sheet for the product concerned, copies of which will be supplied on request. Sika Philippines, Inc. 888 Unit A & B, Marcos Alvarez Ave., Talon V, Las Piñas City 1747 Philippines Tel. No.: +(632) Fax No.: +(632) Website: phl.sika.com 7 Sikafloor -20 PurCem 7/7