Author(s): S Kavitha Karthikeyan, K Karthika, A Vinothini, S Akshaya
Published in: International Journal of Engineering Research & Technology
License: This work is licensed under a Creative Commons Attribution 4.0 International License.
Volume/Issue: Volume. 6 - Issue. 06 , June - 2017
Fly ash as a supplementary cementitious material adds sustainability to concrete. The positive effects of fly ash as a partial replacement of cement on the durability of concrete are recognized through numerous researches; however, the extent of improvement depends on the properties of fly ash. In this study, durability properties of high strength concrete utilizing Class F fly ash have been investigated. Concrete mixtures with fly ash as 20%, 30% and 40% of total binder were used to cast the test specimens. The compressive strength (cube size:150mmx150mm), split tensile (100mm diameter and 200mm height cylinder), pH, sulphate attack (cube size:100mmx100mm), rapid chloride permeability, Scanning electron microscope, radiation shielding of the fly ash and control concrete specimens were determined. The 28-day compressive strength of the concrete mixtures varied from 45 to 55 MPa. Results of mechanical parameters show their improvement with age of the specimens and results of radiation parameters show no significant effect of fly ash substitution on mass attenuation coefficient. The results obtained through this investigation were satisfactory in terms of durability and improved shielding in radioactive structures.
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