This is a split (stone) mastic asphalt pavement with improved watertightness, a feature of SMAC, as well as an improved composition for waterproofing. In order to sufficiently compact the mixture and ensure impermeability, Foam Set, a special additive used in Ecofine, a Warm Mix Asphalt, is used for the purpose of improving workability.

This pavement is laid down by pouring a high-temperature, highly fluid gussasphalt mixture. It is generally used for waterproof layers on deck slab pavement for steel bridges. Rolled Gussasphalt for surface layers with pre-coated chips press-fitted to improve flow resistance and slip resistance is also available.

This modified gussasphalt mixture delivers improved performance over conventional gussasphalt mixtures. This mixture combines excellent flow resistance and flexure-tracking properties with reduced amounts of generated odor characteristics of conventional gussasphalt.

This is the road bridge slab waterproofing method that can be expected to provide exceptional waterproofing and reinforcement effects through the combined use of a highly permeable waterproofing material that deeply penetrates into and adheres to penetrating cracks and fine cracks in concrete slabs and an asphalt-heated coating for the waterproofing material. Because application and curing times are short, this method is suitable for repairing bridge surface pavements where time constraints apply.