There is a growing need for a more efficient approach to evaluation and repair of existing structures. Damaged bridge deck slabs and girders are repaired by removing debris, placing additional reinforcement, splicing broken prestressing tendons, and filling the gaps with concrete or epoxy resin. Test results are presented for verification of the performance of self-consolidating concrete (SCC) used to repair existing structures. SCC offers an excellent solution. It can be used to fill large potholes and also in hard-to-reach repair projects with restricted access for pumping concrete. The tests confirmed that SCC can be considered an attractive repair technology. However, the optimum mixtures are sensitive to small variations in the characteristics of components such as cement type, type and amount of superplasticizer, and type of sand and fillers. The tests and analyses showed that determination of the optimum properties of SCC is most efficient when the paste and mortar are tested first.
Samenvatting