The Effect of Aggressive Environments on the Use of Rock-Filled Concrete in Railway Quick-Repair

Service availability is very important in rail systems. It is necessary to eliminate any problems or faults that may occur in rail systems as quickly as possible. Otherwise, pecuniary loss and intangible damages will be incurred due to failure to fulfil the commitments given. For this reason, the problems caused by all the kinds of collapses or landslides that may occur in the base, subbase of the railway and natural ground need to be solved in a short time. In this study, the effect of aggressive environments on the use of rock-filled concretes, which are an ideal alternative for the rapid and reliable repair of disasters that can create a gap in the ground such as all kinds of collapses or landslides on railway lines, have been investigated. For this purpose, standard cylinder and cube rock-filled concrete specimens are subjected to freeze-thaw cycles and sulfate effect. After exposure to these effects, changes in the unit weight, ultrasound pulse velocity, the splitting tensile strength and compressive strength of rock-filled concretes are investigated. In addition, rock-filled concretes were produced with 0, 1 and 3% superplasticizer and effect of superplasticizer content on the properties of rock-filled concrete is investigated