X-ray CT monitoring of macro void development in mortars exposed to sulfate attack


Tekin İ., Birgül R., Aruntaş H. Y.

COMPUTERS AND CONCRETE, vol.21, no.4, pp.367-376, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 4
  • Publication Date: 2018
  • Doi Number: 10.12989/cac.2018.21.4.367
  • Journal Name: COMPUTERS AND CONCRETE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.367-376
  • Keywords: mortar, porosity, sulfate attack, image analysis, Computerized Tomography, NON-ACTIVE POROSITY, COMPUTERIZED-TOMOGRAPHY, CEMENT PASTE, CONCRETE, MICROTOMOGRAPHY, AGGREGATE, MICROCT, SHAPE
  • Gazi University Affiliated: Yes

Abstract

This study reports the results of nondestructive monitoring of macro void developments in mortars manufactured with both ordinary Portland cement and sulfate resistant cement. Two types of curing were utilized; tap water curing and another curing environment that contains 5% Na-2(SO4) solution. Being the primary objective of this study, macro void developments of the mortar specimens were monitored by X- ray Medical Computerized Tomography. Compressive strength tests and water absorption tests were conducted on specimens that were kept in both curing environments for a duration of 560 days. Data analyses yielded consistent results among the three tests used in this experimental study. Macro void ratios of mortars decreased at the beginning of experiments for a certain period; afterwards, macro void ratios increased. The objective of this study was accomplished as anticipated since X-CT image analysis was able to nondestructively monitor macro void development process in cement mortars.