Page 157

32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf

CONTENTS CONCRETE REPAIR CORROSION CONTROL GROUTS & ANCHORS PROTECTIVE COATINGS INDUSTRIAL FLOORING SURFACE TREATMENTS JOINT SEALANTS CONCRETE JOINTING JOINT FILLERS WATERPROOFING WATERSTOPS ROOFING TIMBER FLOORING ALPHABETICAL INDEX 145 Fosroc® Conbextra EP120 Specification Clauses Performance Specification To the nominated area(s) (specify details and areas of application), grouting must be carried out using a high strength, low exotherm, epoxy resin, flowable grout, suitable for dynamic /repetitive load applications, and for high ambient temperatures (up to 55°C) with good chemical resistance. The two component pack is to be stored, handled and placed, strictly in accordance with the manufacturer’s current technical data sheet and instructions. The hardened epoxy resin grout must have a compressive strength which exceeds 80MPa at 28 days at 23°C, a tensile strength which exceeds 10MPa at 7 days and a flexural strength which exceeds 25MPa at 7 days. The storage handling and placement of the grout must be in strict accordance with the manufacturer’s instructions. Instructions for Use The following instructions for use should be used in conjunction with the Conbextra epoxy grouting applications guide. Foundation surface All contact surfaces must be free from oil, grease, free standing water or any loosely adherent material. Concrete surfaces should be cut back to a sound base. All dust must be removed and bolt holes or fixing pockets blown clean of any dirt or debris. Steel surfaces All steel surfaces should be shot blasted free of rust, paint and flaky mill scale. Formwork The formwork should be constructed to be leakproof as Conbextra EP120 is a free flowing grout. Loss of grout once the material is placed, but not hardened, will result in incomplete filling of the gap. For free flow grout conditions it is essential to provide a hydrostatic head of grout. To achieve this a feeding hopper system should be used. Forming materials should be coated with a release agent such as grease or wax material or a plastic coating.These coatings act as a bond breaker so that a smooth grout surface is achieved after form removal and the forms are protected for reuse. Mixing Pour all the contents of the hardener pack into the base container. Mix the hardener slowly into the base using a slow speed heavy duty mixer such as the Protool MXP 1602 E mixer (product code: TT-621941) or equivalent with the Protool HS2 140 x 600 M14 Helical mixing paddle (product code: TT-614217) or equivalent. For large pours a purpose made grout pump can be used such as a diaphragm pump. Ensure the paddle is fully immersed in the grout whilst mixing. Do not pull the paddle up and down whilst mixing. Ensure there is no unmixed material left in the drum prior to placing the grout. For further information on mixing instructions refer to our epoxy grout installation guide. Placing The mixed grout should be poured steadily from one side only to eliminate the entrapment of air. Continuous grout flow is essential. Sufficient grout must be available prior to starting. The time taken to pour a batch should be regulated to the time taken to prepare the next batch. Cleaning When Conbextra EP120 is cured it is completely resistant to frost and sub zero temperatures as well as temperatures as high as 55OC. Temperature During application Grouting may be carried out without special precautions at ambient temperatures from 5°C to 35°C. Where temperatures exceed 20°C note the pot life will be reduced. Cure temperatures below 15°C will result in slower strength build up; at 5°C cure will stop until the material warms. Exotherm: All epoxy systems will develop a temperature rise on mixing. Its extent will be a function of the volume to surface ratio, the ambient temperature as well as the mass and thermal conductivity of the surrounding materials. In service The cured Conbextra EP120, which is completely resistant to frost and sub-zero temperatures, is suitable for use in service up to 55°C.


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
To see the actual publication please follow the link above