Thermal Cracking in High Volume of Fly Ash and GGBFS Concrete-Reference-Cited by-同舟云学术

Thermal Cracking in High Volume of Fly Ash and GGBFS Concrete

Published:2023-12-11 Issue:1 Volume:17 Page:
ISSN:2234-1315
Container-title:International Journal of Concrete Structures and Materials
language:en
Short-container-title:Int J Concr Struct Mater

Author:

Zhang Yingda^ORCID

Abstract

AbstractSupplementary cementitious materials (SCMs) such as fly ash and ground granulated blast furnace slag (GGBFS) are found to control the maximum temperature and the accompanying thermal gradients effectively. However, SCMs also lead to low early age strength development. Thus, it is crucial to understand the cracking behaviour of SCMs-based concrete affected by the mix design parameters. In this paper, the thermal cracking resistance was evaluated using a rigid cracking frame (RCF) with a computer-controlled temperature profile. The temperature profile was determined using the software ConcreteWorks by assuming the centre point of the mass concrete. The free shrinkage frame (FSF) and match-curing oven follow the same temperature profile as RCF to measure the free total deformation and time-dependent mechanical properties of concrete, respectively. An analytical model was proposed to calculate the autogenous shrinkage and the thermal stress separately. A time-dependent cracking risk coefficient allowing to estimate the risk of early age cracking of concrete was also proposed.

Funder

Cement Concrete Aggregates Australia and the Australian Research Council

Xihua University

Publisher

Springer Science and Business Media LLC

Subject

Ocean Engineering,Civil and Structural Engineering

Link

https://link.springer.com/content/pdf/10.1186/s40069-023-00626-z.pdf

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