Plastiline™ - Humes

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9.5 A liner return shall be provided at the junction of a structure with an adjacent unlined structure or concrete pipe. This return shall be made as follows: Each liner return shall be a separate strip of liner at least 75mm wide jointed at right angles to the main liner by means of approved corner strips. Corner strips shall be welded continuously to the return and to the main liner and applied wherever possible from the back of the lining. Locking extensions shall be provided on returns to lock the returns to the concrete of lined, cast-in-place structures. Each liner return shall be sealed to adjacent construction with which it is in contact by means of a compound recommended by <strong>Humes</strong>. Corner joint internal — D1 Corner joint external — D2 Note: All joints to be covered with PVC tape after attaching sheets, angles and corners to formwork to prevent grout leakage. Radiused corners It is recommended that where possible all corners be radiused as shown so that the sheet is continuous around the corner. 25mm min. Radius 25mm min. Radius 9.6 Where specified, non-skid surfaces are to be installed by welding flat welding strips, at 100mm centres, to the surface of the Plastiline. A less durable alternative would be to bond a clean, well-graded sand to the surface of the lining with adhesive. The materials used and technique employed are to be in accordance with the <strong>Humes</strong>’ instructions. Prior to placing the reinforcement, the lining shall be checked to ensure that it is free from wrinkles and bulges, and is securely held so that it will not move during subsequent operations. Care shall be taken to prevent damage to the sheet at all stages. 9.7 All joints between sheets and/or blankets which will have to be welded after stripping the formwork must be covered by PVC tape before casting to prevent grout penetration behind the sheet. The concrete shall be placed and compacted in such a manner as to produce a dense homogeneous concrete securely anchoring the locking keys in place, and at the same time avoiding damage to the Plastiline. After curing, the forms are to be removed in such a manner as to prevent damage to the lining. Sharp tools must not be used to pry forms from lined surfaces. Any tears, abrasions or cuts are to be marked for subsequent repair. If steel bands are used for securing the lining, they must be cut back to the surface of the concrete after stripping. 9.8 Field joining of the lining can be carried out at any time after the structure has been cured and accepted by the client’s representative. The Plastiline must be clean, completely free of concrete or mortar and other foreign matter and must be dry at the time of application of the welding strip. Under no circumstances must sewage or waste enter the structure until all field welding is completed and all testing carried out. All field welding shall be carried out by qualified welders as specified in Clause 8.4 of these specifications. 9.9 Inspection, Testing and Repair All welds including any repairs shall be subject to the inspection and testing as laid down in Clause 11. 14
10 Jointing of precast products (including pipes) lined with Plastiline to insitu structures 10.1 Where a product lined with Plastiline is to be joined to an unlined insitu structure a liner return shall be made as follows: The lining is cut off flush with the end of the product and an end cap is fabricated to cover the end, and form a 50mm (minimum) return on the outside surface. The end cap is not keyed to the product and plain PVC sheet is used. The annular shape to cover the end may be formed from several pieces butted together with a gap less than 4mm, and may be held in place by an approved adhesive for welding. Outside corner weld strip is used to join the annular shape to the lining and to the return. Any butt joints are sealed with flat welding strip. 10.2 Where a product lined with Plastiline joins a lined insitu structure the joint shall be constructed by one of the following methods: a) Where the product is to be connected after the insitu structure has been constructed, a hole should be cut or formed in the structure and the joint made using an approved method. The joint protection is then provided by using a piece of plain sheet with a central hole cut to fit the interior of the product. This also overlaps the surrounding insitu lining by 50mm (minimum) to 200mm (maximum). The plain sheet may be made up from several pieces. It is welded to the product lining using outside corner welding strip and to the insitu lining using flat welding strip. b) If the end of the product is to be cast into the insitu structure the keys on the lining fitted to the inside formwork should be cut off at the joint position and the lining trimmed off flush with the end of the product, which is then placed in position and held against the insitu lining during the pouring of the structure. After removal of the formwork the insitu lining is cut away flush with the interior of the product and welded to the precast product lining using outside corner strip. 10.3 All field welds, and any repairs carried out in the field shall be subject to the inspection and testing specified in Clause 11. Precast access chamber base with benching. 2100mm Plastiline pipe with an opening for a manhole take off. 15
Page 1 and 2: Plastiline BUILD ON OUR EXPERTISE
Page 3 and 4: INTRODUCTION 1 The material and its
Page 5 and 6: SUMMARY OF PRINCIPAL PROPERTIES 1 T
Page 7 and 8: Industrial waste lines Where such p
Page 9 and 10: 1 Composition 1.1 All Plastiline sh
Page 11 and 12: 8 Laying and jointing of pipes line
Page 13: 9 Incorporation of keyed Plastiline
Page 17 and 18: 11 Testing 11.1 Prior to conducting
Page 19 and 20: 13.3 During loading, transporting,

Plastiline™ - Humes

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