Mechanical Properties of Grout Materials for Concrete Structure Repairs

This research studies about the characteristics of grout material used for repairs to concrete structures. The purpose of this test is to produce materials with optimum composition for use as alternative materials for grouting or retrofitting. Fresh properties testing is carried out in the form of checking the flowability value as a benchmark to determine the proportion of the mixture, in addition to the hardened properties tested in the form of water content, absorption value, specific gravity, unit weight, and initial rate of suction. The results of the fresh properties show that overall the material can be worked or applied. While the hardened properties test results show that RCFA shows quite good results compared to other types of grout material, this is indicated by the results of absorption, moisture content and initial rate of suction which is worth 0. Besides that the type of grouting RCFA also produces the highest compressive strength value that exceeds 100 MPa at 28 days. Type of grouting SSCG produces a compressive strength that is small enough that is below 10 MPa so it is recommended not to use this type of grouting to be applied to the repair of concrete structures.