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Study of Effect of Automated Curing on Mass Concreting

Author(s):

Raghvendra Raghuvanshi , , Rajiv Gandhi Proudyogiki Mahavidyalaya, Bhopal.; Rajesh Joshi, Rajiv Gandhi Proudyogiki Mahavidyalaya, Bhopal

Keywords:

Automated Curing, Concrete, Thermal Cracks, Thermal Insulation Compressive Strength

Abstract

When fresh concrete is poured during the construction of large homogeneous structures, the heat generated due to hydration of cement present is considered. This heat generated is non-uniform in nature and highly depends on composition of cement. Volume change occur due to increasing temperature at early age of concrete. Thermal gradients are produced when the heat generated due to hydration reaction of cement is dissipated through the concrete to the surrounding environment, the lowest temperature occurs at the exposed surface and the highest temperature at the interior part of the concrete. Since the high temperature interior wants to expand it creates tensile stresses at the surface of the concrete. Since the tensile strength of concrete is not fully developed these tensile stresses may surpass the early age tensile strength of concrete and can produce cracks. New automated curing system for mass concrete has been developed to improve the quality of concrete structure and to save construction time and cost. The principle of this method is that the machine-controlled water circulation system of heated hardening water. Applied hardening water on the surface of mass concrete keeps the temperature distinction between centre and surface of the structure below the edge of specification. Mock-up test and field application have been conducted to investigate the performance of this system. In the results, new automated curing system reduced the chance of thermal crack occurrence and improved quality of the concrete structure as well. In this dissertation, 1m3 concrete cube of M40 grade is casted to check thermal stress and thermal cracks, along with 18, 150 mm * 150 mm * 150 mm concrete cube is also casted to check its compressive strength.

Other Details

Paper ID: IJSRDV6I60196
Published in: Volume : 6, Issue : 6
Publication Date: 01/09/2018
Page(s): 216-218

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