UK first as Tufflayer SAMI asphalt gains BBA HAPAS approval

Heidelberg Materials UK has become the first asphalt supplier to receive BBA HAPAS1 approval for a stress absorbing membrane interlayer (SAMI) solution. Its Tufflayer product, an alternative to geogrid asphalt, uses a specially designed polymer modified bitumen (PMB) supplied by Shell Bitumen to achieve optimum flexibility and enhance fatigue resistance. It significantly delays the effects […]