This code details specifications for bitumen-impregnated fibre preformed fillers used in expansion joints of concrete pavements and structural elements. It mandates properties such as resilience, non-extrusion, and resistance to water and grit intrusion to maintain joint performance. The standard is essential for professionals involved in the design, manufacture, and installation of expansion joint fillers in infrastructure projects.
Overview
This code details specifications for bitumen-impregnated fibre preformed fillers used in expansion joints of concrete pavements and structural elements. It mandates properties such as resilience, non-extrusion, and resistance to water and grit intrusion to maintain joint performance. The standard is essential for professionals involved in the design, manufacture, and installation of expansion joint fillers in infrastructure projects.
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Frequently Asked
The fillers must resist damage from handling, recover at least 70% of their thickness after compression, and withstand compression loads between 0.7 to 5.3 N/mm² when compressed to half their thickness. Bitumen loss during compression should not exceed 3%, extrusion of the free edge must be limited to 6.5 mm, water absorption must be below 20%, density at least 300 kg/m³, and bitumen content no less than 35%. They should also resist weathering without disintegration and have recovered bitumen penetration values between 25 and 100 at 25°C.
Permissible fibres include soft board, fibre board, cane, or any other suitable cellular-type fibres. These fibres must be formed into pre-shaped strips, securely bonded, and thoroughly impregnated with bitumen to meet the performance standards required for expansion joint fillers in concrete pavements and structures.
Compression resistance is assessed by measuring the force needed to compress the filler specimen to 50% of its original thickness according to IS 10566-1983. The acceptable load range is between 0.7 and 5.3 N/mm² (7 to 53 kgf/cm²). During this test, bitumen loss must not exceed 3%, and the filler should demonstrate a recovery of at least 70% of its original thickness without any structural failure.
The bitumen impregnated fibre strips should conform to dimensional tolerances of ±5 mm in length, ±3 mm in width, and ±1.5 mm in thickness, measured according to IS 10566-1983. These tolerances ensure proper fitting within expansion joints and consistency in performance.
Packaging must be designed to prevent deformation, breakage, or deterioration of the filler’s properties during transportation. This involves using sturdy, cushioned containers that maintain the shape and bitumen saturation of the preformed strips. Additionally, packaging should be clearly marked with the manufacturer's name or trademark, size, and filler type to ensure traceability and compliance.
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