Effects of micro-nano bubble water and binary mineral admixtures on the mechanical and durability properties of concrete

• Published in: Construction & building materials 2018-03, Vol.164, p.371-385
• Main Authors: Khoshroo, Moein, Shirzadi Javid, Ali Akbar, Katebi, Ali
• Format: Article
• Language: English
• Subjects: Analysis; Building materials durability; Concretes; Durability; Mechanical properties; Micro-nano bubble water; Mineral admixtures
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2017.12.225

•We presented a comprehensive study on the mechanical and durability of mixtures containing natural pozzolans.•A locally natural pozzolan called Chekneh extracted from mines in Iran is used in this study.•The micro-nano bubble water effect as a new material and as a substitute for the ordinary water in the concrete is evaluated. This paper presents an experimental research on effects of micro-nano bubble water and mineral admixtures (zeolite and Chekneh pozzolans) on the mechanical and durability properties of concrete. In this study, 18 types of mixtures including 3 categories of conventional concrete were prepared. The first category was a mixture containing just one type of mineral admixture (zeolite or Chekneh) at different percentages; the second category contained a binary combination of zeolite and Chekneh; and the third category including a combination of zeolite, Chekneh, and micro-nano water bubble. The results emphasized that zeolite and Chekneh pozzolan notably improve the durability properties of concrete, such as water absorption, electrical resistance, and chloride permeability, leading to the increased pozzolanic replacement. In addition, using micro-nano bubble water improved mechanical properties of concrete such as compressive and tensile strength at different ages and reduced the rate of water absorption and chloride permeability. In this regard, the greatest improvement in the compressive, tensile strength, and electrical resistance tests were for the mixture including a combination of 10% zeolite, 10% Chekneh pozzolan, and 100% micro-nano bubble.