EVALUATION OF FIBER REINFORCED RAPID-SETTING MATERIALS FOR HIGHWAY RAPAIR

Using fiber reinforcement with rapid-setting materials is a cost effective and simple way to improve some of the properties of the materials. Whereas the properties of portland cement concrete with fiber reinforcement and properties of rapid-setting materials without fiber reinforcement are fairly well known, the effect of fibers on rapid-setting materials has not been fully investigated. This report provides an evaluation of the performance of three different types of rapid-setting materials reinforced with three different types of fibers. Materials tested include gypsum modified portland cement concrete, magnesium phosphate concrete, and modified portland cement concrete. Fibers used in tests are hooked and half-round crimped steel fibers and polypropylene lattic bundles. The results of laboratory tests with varied coarse aggregate content and fiber application rates are given. Field repairs made in Paris, Texas, with fiber reinforced materials are described. (Author)