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a.b.e. Construction Chemicals’ durajoint flexband joint bandage system offers the ideal solution for waterproofing expansion and construction joints, including critical joint areas with high or frequent movement, says a.b.e. Technical Sales Consultant, Steff Dalton.

a.b.e. is part of the Chryso Southern Africa Group of companies.

a.b.e.’s durajoint flexband system – together with a wide variety of other a.b.e. products – were recently used to seal a new 10 mega litre concrete reservoir at Savana City in Sebokeng.  Basil Read and Southey Contracting were the main contractors for the project.

Dalton says the durajoint flexband system is particularly suitable for the sealing of joints in potable water concrete reservoirs and other water-retaining structures and consequently was ideal for the reservoir project.

“The system includes durajoint flexband adhesive, a special epoxy adhesive for bonding the durajoint flexband thermoplastic elastomer membranes. This adhesive is a two-component, solvent-free epoxy resin bedding mortar/adhesive with low slump characteristics. It can be applied in sections of up to 20mm thickness horizontally, and 10mm vertically in a single application without the need for formwork. Greater thickness can be achieved by the application of more layers. The adhesive can be hand mixed on a flat clean surface,” Dalton states.

Some of the advantages of the adhesive include early high strength which reduces downtime, high peel strengths to the membrane, and resistance to chemicals. Priming is usually not required unless the concrete is very porous. Food and Drug Aministration-compliant, durajoint flexband adhesive is supplied in 2 litre kits. The solvent wipe, used to clean the surfaces to be sealed, is produced in 5 litre containers. The system’s HDPE strips are 3 mm thick, 50 mm or 75 mm wide, and produced in 3m lengths. The strips are used to centrally straddle expansion joints when support below the flexband membrane is required.

In addition to waterproofing concrete reservoirs, the flexband system can be used on a variety of substrates, including damp substrates. It can also be used in contact with potable water. The bandage is supplied in 20 metre rolls and several widths.

Other a.b.e. products used for the sealing of the new Savana City reservoir include a.b.e. durajoint external E and Dumbell, duraproof Kristalkote, durarep GT MCI and FC, epidermix 345, durasheet, durakol GMH, and Dow Corning 888 sealant.

The project was completed at the beginning of July 2016.

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