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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 ® ® 533 Vandex® Uni Mortar 1-Z Properties Form: Cementitious powder Colour: Cement grey Bulk density: 1.50 - 1.70 kg / L Compressive strength: 45 MPa after 28 days water storage Bending tensile strength: 7 MPa after 28 days water storage Elastic modulus: 2.45 x 104 N/mm² after 28 days air cure at 23°C, 50% RH Initial setting time: 5 - 6 hours Full cure time at 5 days 20°C 50% RH: Physical or chemical change: Chemical cure Application temperature: 5°C - 30°C Service temperature (continuous ambient): Minus 40°C - 120°C Specification Clauses Where so designated on the drawings, surfaces to be repaired and waterproofed shall have a surface applied, cementitious repair and waterproofing mortar applied. The repair and waterproofing mortar must be capable of being applied at a thickness ranging from 6 - 12 mm to vertical, horizontal and overhead surfaces without slumping. The mortar must form a water impermeable layer on the surface of the substrate and must not rely on crystal growth within the substrate in order to be effective. It must have a proven capability of sustaining pressures of 7.0 bar (70 metre water head) at a thickness of 10 mm while maintaining its waterproofing integrity. The waterproofing treatment must have a compressive strength greater than 38 MPa and bending tensile strength greater than 5 MPa after 28 days water cure. The cementitious waterproofing layer must have a modulus of elasticity greater than 2.0 x 104 MPa after 28 days cure. The setting time for the waterproofing must be in the range 2 - 4 hours and the bulk density for the dry powder before mixing must be in the range 1.50 - 1.70 kg/litre. The cementitious mortar must be non-toxic and be capable of being applied to concrete and masonry surface by trowel or by spray. The waterproofing must be installed by a prequalified contractor nominated by the supplier and both the manufacturer and supplier must be accredited to ISO9001. Vandex Uni Mortar 1-Z supplied by Parchem is such a product. Surface Preparation When applying Vandex Uni Mortar 1-Z to existing concrete or masonry, all surfaces to be waterproofed should be clean, sound and free of concrete curing compounds, form release agents, paints and all other coatings, dirt and contamination. Concrete surfaces should be prepared by water blasting, grit blasting or wire brushing in order to remove the weak laitance layer from the surface of the concrete in preparation to receive the Vandex Uni Mortar 1-Z. Priming Priming is not normally required on good quality concrete substrates, however all surfaces must be pre-watered before applying Vandex Uni Mortar 1-Z. Movement joints All expansion and movement joints should be sealed with a suitable joint sealant after application of the Vandex Uni Mortar 1-Z. Consult your local Parchem office for advice on the joint sealing method best suited to your application. Cracks All shrinkage and non-moving structural cracks having a width equal to or less than 0.3 mm will be waterproofed by applying Vandex Uni Mortar 1-Z directly bridging over the crack. Static cracks wider than 0.3 mm must be routed out to form a ‘V’ shaped groove with a hand chisel or power chisel to a depth and width of approximately 25 mm. Live cracks cannot be waterproofed with Vandex Uni Mortar 1-Z. If the structure contains live cracks, Vandex BB75E-Z, an elasticised cementitious waterproofing membrane should be considered. Consult your local Parchem office for advice regarding the best method of waterproofing live cracks. Water seepage All water seepage must be stopped using Vandex Plug prior to the application of Vandex Uni Mortar 1-Z. Do not attempt to apply Uni Mortar 1-Z over weeping or seeping substrates no matter how slow the seepage, as the Uni Mortar 1-Z will be damaged by the seepage water before it has a chance to cure. Application Instructions Vandex Uni Mortar 1-Z is supplied in the form of a dry powder and can be applied as a slurry by trowel. To mix, place 25 kg of Vandex Uni Mortar 1-Z into a clean container and add 3 - 4 litres of clean tap water for trowel application. The Vandex Uni Mortar 1-Z powder and water must be thoroughly mixed using a slow speed electric drill (300 rpm) or Festo type mixer fitted with a grout mixing paddle (PC 770163) for 3 minutes immediately prior to use. Mix only as much material as can be used in 20 minutes and stir the mixture frequently. If the mixture starts to set,


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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