Consists of a fiber boarding impregnated with bituminous materials to render it durable and waterproof. It is compressible and possesses a high degree of recovery after compression is released, thereby ensuring that no free space develops in the expansion joint.
Road Guard Joint Filler is available in thinknesses of 12mm, 18 mm and 25 mm, approx. (1/2", 3/4 " & 1") in lengths up to 1.2 m (4'). The top 25 mm (1") of the expansion joint is completed by the application of a Joint Sealing Compound.
Purpose:
• To permit free movement of the concrete slabs during expansion and constraction.
• To provide a waterproof seal.
• To resist entry of foreign matter into the joint space.
Physical Characteristics:
• Consists of a fiber board impregnated with bituminous materials. Compressible.
• Posses a high degree of recovery, once compression is relaxed & non extruding.
• Available in the thickness of 12mm, 18mm and 25mm.
I.S. specifications 1834/1984 and I.S. 1838/1983
In the construction of runways, roads and buildings, involving the casting of concrete in slab form, provision must be made to accommodate the expansion and construction which occurs with seasonal variations in temperature. In tropical countries these variations may be considerable. It is of utmost importance to use correct joint filling and sealing compound to preserve the life and evenness of the surface.
Normal practice in runway and road construction is to provide both longitudinal and transverse expansion joint of 19 mm or 25 mm (3/4" or 1") width between butting slabs of reinforced concrete at designed intervals, and at intersections with other constructions, e.g. bridges, level crossing, etc.
Expansion Joints:
The expansion joints between the slab must fulfill the following functions:-
(a) Permit free movement of the concrete slabs in expansion and contraction.
(b) Provide a waterproof seal which will, at all times, prevent the percolation of surface water downwards, there by adversely affecting the bearing properties of the sub-grade.
(c) Resist entry of foreign matter into the joint space, thereby avoiding interference with the free movement of the slabs under expansion and thus preventing damage to the slabs.
In order to fulfill these functions, the materials comprising the expansion joint must be compressible, resilient and non-extrudible.