Assessment of shrinkage deformation and transverse crack formation in scgc for structures

The occurrence of transverse cracking failure resulting from the restrained shrinkage causes a significant structural problem in several type of the structures such as reinforced concrete building, bridge deck, concrete pavement, etc. The size and geometry of the structural members, span length, construction techniques, reinforcement detailing, and concrete properties are important and influencing the cracking in the structure. In this study, in order to increase the possible use of self-compacting glass concrete (SCGC) in the structural applications, firstly, the shrinkage deformation and crack formation in ring type members cast with SCGC were assessed experimentally. The test specimen consists of a 35 mm thick a mould of concreting around a rigid steel ring 25.5 mm in thickness with a diameter of 375 mm and a height of 140 mm. The test was conducted under extensometer and microscope controls to monitor the strain on the prism and crack width on the ring. In addition to such tests, some fresh related performances of the mixtures were evaluated. To this aim, 16 different mixtures were designed considering single and combined use of fine and coarse recycled glass and used for the preparation of test specimens. The analysis of the results showed that the formation of the first transverse crack prolonged and its width propagation reduced in the ring members having structural recycled glass concrete.