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Technical Dayta Sheet Compedium

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 Page 3 565 Advantages „ Self-adhesive properties makes installation much easier and reduces construction costs „ Co-extruded design means expansion is directed across the joint for maximum seal „ Unaffected by repeated wet and dry cycles „ No site welding as is required for traditional PVC waterstops „ Has a delay coating to help prevent premature expansion „ Extra cans of delay coating are available if required „ Changes colour as a visual alert to let you know it has expanded „ No need for special intersections, joining is by simple butt joins „ Can be applied to rough surfaces using Leakmaster gun grade waterstop „ Easy to handle and install „ Can be joined to traditional PVC waterstop „ No compaction or displacement problems „ Non toxic and non hazardous „ No need for split forming Design Criteria Hydrotite should be used to prevent the passage of water through low movement joints in both new in-situ concrete and between new and existing concrete. Hydrotite can also be used around penetrating pipe entries prior to concrete placement. Hydrotite increases in volume in the range of up to 800% and gives a resistance to hydraulic heads of up to 50 metres. Hydrotite waterstops should be positioned to ensure that a minimum of 50 mm cover of concrete is present to accommodate pressure developed during the swelling process. Hydrotite is suitable for applications between existing and newly placed concrete where there is little or no steel continuity and therefore some small movement may occur. Hydrotite is generally not suitable for use in expansion joints Table 1: Basic physical properties of Hydrotite Item Unit Hydrophilic Rubber Chloroprene Rubber Standard Typical Standard Typical Specific Gravity 1.40 ± 0.10 1.35 1.40 ± 0.10 1.41 Hardness (JIS-A) 50 ±5 52 50 ± 5 51 Tensile Strength N/mm² min. 2.94 3.63 min. 8.82 12.25 Elongation % min.600 760 min. 400 435 Chemical Resistance The influence of pH values of concrete, grouting material and ground water upon the expansion of Hydrotite was tested using hydrophilic rubber as follows. The specimen was immersed in each solution for seven days and the retention value of tensile strength and elongation were measured. Then, the specimen was removed from each solution and placed in tap water for seven days. The specimen was then compared with specimens that had been expanded in tap water only. The retention value of both physical properties and expansion was compared with that of specimens tested in tap water. Table 2: Behaviour in chemical solution Hydrotite exhibited retention values 90% or more in the following solutions: „ pH 3 aqueous solution „ pH 5 aqueous solution „ pH 7 (tap water) „ pH 9 aqueous solution „ pH 11 aqueous solution „ Ferrous aqueous solution „ Bentonite aqueous solution „ Grout aqueous solution Hydrotite July 2008


Technical Dayta Sheet Compedium
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