Paving Ghana, West-Africa & the World, one highway at a time…
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PMB for bond coats Asphalt bond coats and bond coats for glass fiber reinforcement (GridSeal®) When installing a bond coat or GridSeal® a quantity of 1.0 to 2.0 kg/m2 of Sealoflex® SC is sprayed on the existing pavement or on the reinforcement and treated with crushed aggregate. After this, one or more hot mix asphalt layers are applied.
Application of Sealoflex® SC provides an extremely good, though visco-elastic bond between the existing pavement and the new asphalt layer, while ensuring waterproofed protection of the underlying pavement structure for a considerable period of time. The GridSeal® system also provides durable anchorage for the reinforcement, resulting in the highest protection against reflective cracking from underlying cracks and joints.
PMB for membranes Stress absorbing membrane interlayers (SAMI) A SAMI constructed with Sealoflex® SC reduces or prevents the reflection of cracks and joints into a new asphalt overlay and ensures waterproof protection of the underlying pavement for a significant period of time.
Before applying a new asphalt layer, 2.0 to 3.0 kg/m2 or Sealoflex® SC is sprayed on the surface that has to be treated. The quantity required depends on the severity and the size of the cracks, the type and thickness of the asphalt overlay, the traffic intensity and the climatic conditions. Crushed aggregate is spread over the treated surface in such a way that only 50% of the surface is covered, thus ensuring that construction traffic can pass over the surface without sticking to the SAMI.
Waterproof membranes for concrete structures Sealoflex® SC-6 is a modified bitumen with a high polymer content. It has been specially developed for waterproofing of concrete structures, such as bridges, viaducts and tunnels, that are to be overlaid with asphalt. It can be applied on newly constructed as well as existing structure at a rate of 2.5 to 3.0 kg/m2.
Before applying Sealoflex® SC-6 a special primer has to be used, but thereafter the application procedure is the same as for a SAMI.
PMB for membranes and bond coats Polymer Modified Bitumen