FAQS & FURTHER INFORMATION

Xypex Admix / Xypex Coatings / SMR Projects

XYPEX ADMIX

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Xypex BBA certificate 05/4216 states that at 88mm thick concrete containing Xypex Admix will achieve a Grade 3 environment as a standalone waterproofing solution however, for practicality purposes on site we specify a minimum thickness of 150mm.

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A crack width design of 0.4mm or less is required, even if your structure is water retaining.

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This is normally possible but we would need to comment specifically on each project application, please contact the Technical Sales Manager for your area for details.

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12 years is our standard period, this may be extended to 15, 20, 25 or even 50 years and is done on a project specific basis, please contact the Technical Sales Manager for your area for details.

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Not normally, Xypex can work with designs with a minimum cementitious content of 300kg/m³ upwards, a WCR between 0.35 and 0.55 without consideration and any level of cementitious blend from 100% Portland Cement up to 80% GGBS or 45% PFA. Xypex Admix will also work alongside other types of admixture such as WRA’s, super plasticisers, air entrainment etc. without any affect to either.

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No, striking times as per the relevant British Standard(s) should not be affected.

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As long as moisture is present feeding the crystalline growth within the crack, Xypex is warranted to self-heal cracks up to 0.4mm.

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No, as long as the structural engineer has signed off your pour layout to confirm that the maximum crack width design for the project will not be exceeded we have no further requirement.

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Xypex Admix is supplied directly to your chosen ready mix company as it is dosed by them and becomes an integral part of their concrete. You order your concrete from them and it arrives on site dosed and ready to place like any normal ready mix concrete.

XYPEX POST-APPLIED

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Laboratory tests have shown that that a two coat application of Xypex Concentrate on 50mm thick porous concrete totally eliminates leakage at pressures of at least 123.4 bar of head pressure.

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All Xypex products come with a manufacturer’s warranty but remedial applications can also be fully warranted when applied by our in house Field Services Team.

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There is no requirement for the concrete to be dry prior to application, quite the opposite in fact. Xypex requires the concrete surface to open capillary & pore with the substrate Saturated Surface Dry (SSD).

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A two coat application of Xypex Concentrate is brush applied with one coat brushed ‘north to south’ and the other ‘east to west’

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We recommend two 1.00mm - 1.25mm coats of Xypex Concentrate with the second coat being applied after the first coat has reached an initial set but is still green. (less than 48 hours).

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Xypex must not be applied when the ambient temperature is below 4°C or likely to fall below 2°C prior to initial set. Once initial set is reached the concrete should be covered with curing blankets or kept above 4°C by other means for a period of not less than 48 hours.

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Curing should begin as soon as the coating has set to a point where it cannot be damaged by a fine spray of water. A misty fog spray of clean water is preferred and under normal conditions it is sufficient to spray the treated surfaces three times a day for two to three days. The coating must be protected during this period.

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Even as a coating Xypex can be used to waterproof water retaining structures and has the benefit that it can be applied to either the positive or negative side of the concrete. Xypex Concentrate is approved under regulation 31 of the Water Supply (Water Quality) Regulations 2000 and approved for use in public water supplies.

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Paint, epoxy coatings etc. can be applied to Xypex once it is fully cured whilst grouts, cement parge coats, plaster and stucco can be applied after initial set but whilst it is still green (8 – 48 hours)

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As a coating Xypex produces a grey coloured, cementitious surface.

SMR PROJECTS

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SMR Projects employs a team of permanent and full time Field Service Technicians who inspect, approve and sign off all Xypex joint details prior to any concrete being placed.

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SMR Projects utilises a comprehensive and robust QA procedure that incorporates the following:
• A full specification detailing all elements of areas to be waterproofed for all parties.
• A complete Site QA Manual with all relevant information.
• Confirmation that the concrete mix design meets the criteria for the use of Xypex Admix.
• Instigation of QA and monitoring procedures at the concrete batching plant.
• Induction of ground workers through a tool box talk on the use of the Xypex system prior to any concrete being placed.
• Practical demonstration of the preparation, mixing and application for Xypex joint ancillaries.
• Inspection, approval and sign off of all Xypex joint details prior to each pour, which ensures their inclusion in the Xypex warranty.
• Samples of delivery tickets from the previous pour checked against approved mix design and a copy filed on our system.
• Inspect, approve and sign off all cast in penetrations prior to concrete placement, which ensures their inclusion in the Xypex warranty.
• A visual inspection of previously placed concrete when the shutters have been struck, checking for bad compaction or any other relevant issues.
• Reporting and documenting any issues on site.
• Raising reports and / or RFI’s to ensure correct completion of QA procedures.
• Instruction and demonstration of sealing tie bolt holes.
• All inspections recorded and retained in accordance with our QA system, a PDF copy is issued to site on completion of the inspection for inclusion in the Site QA Manual.
• DWG version of plans are marked up with individual inspections for visual confirmation of actual pour locations where inspections have been made (for SMR Projects internal use only).
• Final inspection with all relevant parties at practical completion and project sign off.
• Issue of the warranty, which is made out to the project and therefore transferrable up the chain to the client.

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Yes. Our Field Service Technicians will attend every Xypex to Xypex pour in person to conduct a thorough inspection.

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On rare occasions where a physical inspection is not able to take place, inspection, approval and sign off may be able to be conducted through accurate photographs of the joint details.

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When a project requires a Grade 3 environment we have purposely set ourselves up as a company to be able to assist in projects where two forms of waterproofing are required by the client’s insurance company. We have partnerships set up so that we are able to offer both Type A and Type C waterproofing systems alongside our Xypex Admix Type B waterproofing.

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When one of our partnered companies is used, we will carry out a final inspection and once both systems have been signed off, a single point warranty for both systems is issued. Both systems are covered by a 12 year single point dual warranty (extended warranties are available; please contact the Technical Sales Manager for your area for details).

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All of our Technical Managers are CSSW qualified and therefore can take on the design responsibility if required for both single and dual waterproofing systems.

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Yes. All of our procedures, policies and processes are accredited under the UCAS Quality Management System.

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Our in house CAD team will take the DWG drawings for a project and add the waterproofing details into the project drawings. We then issue an in-depth Waterproofing Specification and Quality Plan including the waterproofing detail drawings we have created.

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We offer both on site and virtual CPD seminars for all levels of Architects, Structural Engineers and Contractors. We also have an in house practical training room where we can show the products in use and train users in the application of different products.