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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 ® 525 minutes and stir the mixture frequently. If the mixture starts to set, do NOT add more water, simply stir the product to restore workability. Ensure that all surfaces to which Vandex Concrete Grey will be applied are pre-watered. The correct amount of prewatering is measured by the substrate taking on a greenish appearance, however there must be no free surface water. A simple check can be performed by placing a hand on the pre-watered substrate and removing the hand. If the hand is wet from contact with the substrate, then the substrate is too wet and must be allowed time for the excess surface water to evaporate. Surfaces that have been pre-watered and dry out before application of the Vandex Concrete Grey must be pre-watered again. $SSO\WKH¿UVWFRDWIURPWKHEDVHRIWKHZDOODQGZRUN towards the top using a stiff bristle brush in a horizontal scrubbing action or by spray using a hopper gun. When using a hopper gun, immediately after application of WKH¿UVWFRDWVFUXEWKH9DQGH&RQFUHWH*UH\LQWRWKH concrete surface with a stiff bristle brush using a horizontal action. After 4 - 5 hours apply the second coat ‘green on green’ so that a chemical bond is achieved between the two coats. Do not apply more first coat during a day’s work session than can be overcoated with a second coat during the same day. When applying Vandex Concrete Grey by spray using a Vandex hopper gun, ensure that the gun is held directly perpendicular to the surface at a distance of about 500 mm to ensure that the maximum impact energy is applied to the surface and to prevent any shadowing across small surface imperfections. Besides temperature, humidity also has an influence on waiting times between coats and resistance to rain. Ensure that the freshly applied Concrete Grey is protected from rain for the first day, and the drying effects of the sun and wind during the first 5 days of cure. In most remedial waterproofing applications, Vandex Concrete Grey is applied in two coats by brush or spray at an application rate of 0.75 kg / m² / coat. Application rates are as follows; Water retaining structures and internal concrete walls Apply two coats by brush or spray at an application rate of 0.75 kg / m² / coat. Concrete floors and decks Apply one coat at an application rate of 1.2 kg / m² by brush onto hardened concrete, or dry sprinkled onto fresh wet concrete after initial set, and power trowelled into the surface. Construction joints Apply one coat by brush at an application rate of 1.5 kg / m², applied to the abutting slab immediately before the next concrete pour. Blinding concrete Apply one coat by brush at an application rate of 1.2 kg / m², or dry sprinkled onto the blinding slab immediately before pouring the overlaying slab. Curing and protection Concrete surfaces treated with Vandex Concrete Grey must be kept damp and must be protected from the drying action of direct sunlight for a minimum period of 5 days after application. Protect all treated surfaces from wind and frost, by covering with plastic sheeting, damp hessian or equivalent. Cleaning Tools and equipment should be cleaned with water immediately after use. Limitations Vandex Concrete Grey works by reacting with the free lime in the host concrete. For this reason Vandex Concrete Grey should not be used on substrates which do not contain free lime. Examples of unsuitable substrates include brick, stone ceramics, granite and marble. Concrete blocks and Hebel blocks are also unsuitable because of their very low lime and cement content and the very porous nature of these blocks. Water seepage through these substrates can be treated using Vandex Uni Mortar 1-Z or Vandex BB75-Z, a surface applied cementitious waterproofing membrane. Vandex Concrete Grey is designed as a waterproofing treatment for concrete. The product may discolour after application and therefore should not be used as an architectural finish. Estimating Packaging Vandex Concrete Grey: 25 kg bag Vandex Uni Mortar 1-Z: 25 kg bag Vandex Plug: 15 kg resealable plastic pail Coverage Vandex Concrete Grey: 1.0 - 1.5 kg / m² 16 - 25 m² / 25 kg bag Vandex Uni Mortar 1-Z: 6 - 12 kg / m² Storage 12 months in original containers stored in cool, dry conditions i.e. not exceeding 30°C. Storage above this temperature may reduce storage life. Vandex® Concrete Grey


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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