Abstract
This study is investigated the mechanical properties and durability of lightweight aggregate concrete (LAC) incorporating of metakaolin (MK) and ground granulated blast furnace slag (GGBFS) mixed with artificial seawater. The compressive strength, chloride penetration, drying shrinkage and hydration products of LAC are analyzed. In addition, the micro-hardness of interface transition zone (ITZ) and microstructure development of LAC are characterized by different analytical techniques. The results indicate that the compressive strength of LAC containing 10 wt% GGBFS and 10 wt% MK with seawater mixing exceeds 50 MPa at 28 days. The resistance to chloride ion penetration and drying shrinkage of LAC are improved significantly by the addition of MK and GGBFS, and seawater mixing cannot deteriorate its chloride permeability due to the formation of Friedel’s salt (Fs). The combinations of pozzolanic reaction of MK and GGBFS, internal curing of lightweight aggregate and accelerated cement hydration by seawater result in denser hydration products and reduction of Ca/Si ratio in ITZ, which have a great beneficial impact on the durability properties of LAC.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
