ContractorSkid Resistant Roading Material: looking for the God particleContrafed PUblishingMay 15, 2015April 23, 2016 by Contrafed PUblishingMay 15, 2015April 23, 2016 AQA technical advisor BILL BOURKE updates the continuing search for the ideal skid resistant roading material. The AQA’s technical group has been consulting with the...