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Jenkins, K.J. (author), Molenaar, A.A.A. (author), De Groot, J.L.A. (author), Van de Ven, M.E.C. (author)Following the lapse in patent rights on foam-producing nozzles, the use of foamed bitumen for the improvement of road construction materials has become more accessible and as a result, it's use increased considerably in the 1990's. In addition, the applications of foamed bitumen process have diversified. No longer is the process only used for...journal article 2000