Dada S. Patil 1, Shrishail B. Anadinni2, and Anand V. Shivapur3
1Research Scholar, VTU, Belagavi, Assistant Professor, Department of Civil Engineering, Anjuman-I-Islam’s Kalsekar Technical Campus, School of Engineering and Technology, Plot 2 & 3, Sector 16, Thana Naka, Khandagao, New Panvel, Navi Mumbai, India 2Professor and Associate Dean (Core Branches), School of Engineering, Presidency University, Rajanakunte, Yelahanka, Bengaluru, India 3Professor, Department of Civil Engineering, Centre for PG studies, Visvesvaraya Technological University, Belagavi
Received: November 2, 2021 Accepted: February 12, 2022 Publication Date: June 3, 2022
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
In this experimental work, evaporation, degree of hydration, capillary porosity, total porosity and gel/space ratio of hardened state of Ordinary Portland Cement (OPC) of 53 grade, incorporated with Polyethylene Glycol 400 (PEG 400) have been investigated. Curing periods considered were 3, 7 and 28 days. As the Self-Curing concretes of M20 grade with 0.55 water-cement ratio and M50 grade with 0.34 water-cement ratio were being produced in the laboratory, the water-cement ratios considered for this laboratory work were also 0.34 and 0.55. Average molecular mass of Self-Curing chemical was 400. Its dosages were 1%, 1.5% and 2% by mass of dry cement. The conventional cement paste cubes were cured by placing under water. However, cubes with PEG 400 were kept in an open air in the laboratory to self-cure. Experimental work showed that PEG 400 proved to be an effective Self-Curing chemical by retaining water, thereby reducing the evaporation, maintaining the adequate degree of hydration, exhibiting capillary porosity, total porosity and gel/space ratio values on par with the water-cured cement paste at both the water-cement ratios.
Keywords: Insufficient moisture conditions, permeability, chemical reactions, hydration products, relative humidity, shrinkage, etc.
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