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walls without requiring sealers or finishers. By experience variable loading or repeated movement. using KIM, the shotcrete’s permeability was Using shotcrete also enabled Kryton’s crystal- successfully reduced and permanent waterproof line jointing techniques and associated products protection was ensured. To do this, KIM’s hydro- (Krystol Waterstop System) to be applied in philic chemicals react with water or moisture, improved working conditions where necessary, growing millions of permanent, needle-like allowing enhanced waterproofing protection to crystals throughout the concrete matrix, blocking the most vulnerable areas. The KIM/shotcrete the movement of water in all directions. These mixture was used to waterproof the basement floor crystals then remain dormant in the concrete, and slab, lower ground floor slab, and basement walls, if new hairline cracks (up to 0.5 mm 0.02 in.) and the Krystol Waterstop System was used for form, the crystals will react with any incoming all the basement joints. water to “self-seal” the hairline crack and maintain Using shotcrete and KIM together effectively a watertight barrier. KIM is an effective water- reduced construction time by 30%. The owners proofing system for rigid concrete structures only were very pleased with the results and impressed and may not reliably seal cracks and joints that with the speed of the work. Where Were Kryton Products Used? Product Used Used Where Quantity Basement floor slab, lower ground floor Product 1 KIM HS 82 m3 (107 yd3) slab, lining walls Construction joints from slabs to lining Product 2 Treatment 17 m2 (180 ft2) walls Construction joints from slabs to lining Product 3 Internal grout 82 m (270 ft) walls Vertical construction joints to all lining Other products External grout 13 m (43 ft) wall—lining wall junctions References 1. Hill, D., “London’s Population Up By 12% in 10 Years,” The Guardian, July 16, 2012, http://www.theguardian.com/ uk/davehillblog/2012/jul/16/london-population-rises-12. 2. BS 8102:2009, “Code of Practice for Protection of Below Ground Structures against Water from the Ground,” British Standards Institution, 2009, http://shop.bsigroup.com/ ProductDetail/?pid=000000000030168198. John Anderson is a Territory Manager, Western Canada, for Kryton. With over 20 years of experience supporting projects in the concrete and construction industries, Andersen has spent the past 6 years of his career applying his knowledge and experience to concrete waterproofing projects throughout Western Canada and the Pacific Northwest of the United States. He brings extensive technical knowledge and a diverse history of hands-on experience to every Kryton water- proofing project he supports. Anderson can be contacted at (603) 324-8280 or jandersen@ kryton.com. 14 Shotcrete • Spring 2014


2014SprShotcreteEMag
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