Abstract
Cracking is a common problem in concrete structures in real-life service conditions. In fact, crack-free concrete structures are very rare to find in real world. Concrete can undergo early-age cracking depending on the mix composition, exposure environment, hydration rate, and curing conditions. Understanding the causes and consequences of cracking thoroughly is essential for selecting proper measures to resolve the early-age cracking problem in concrete. This paper will help to identify the major causes and consequences of the early-age cracking in concrete. Also, this paper will be useful to adopt effective remedial measures for reducing or eliminating the early-age cracking problem in concrete. Different types of early-age crack, the factors affecting the initiation and growth of early-age cracks, the causes of early-age cracking, and the modeling of early-age cracking are discussed in this paper. A number of examples for various early-age cracking problems of concrete found in different structural elements are also shown. Above all, some recommendations are given for minimizing the early-age cracking in concrete. It is hoped that the information conveyed in this paper will be beneficial to improve the service life of concrete structures. Concrete researchers and practitioners may benefit from the contents of this paper.
Highlights
Early-age cracks are defined as cracks that generally develop within the first seven days after the placement of concrete; 60 days can be considered the maximum limit for early-age cracking, accounting for the initiation of cracks at the bottom of the concrete slab that may take more than one week to be visible [1].The early-age characteristics of concrete have been a point of research interest for a long time, and researchers have focused on studying different aspects of the early-age characteristics.Bentz [2] reviewed the work on the influence of moisture, temperature, and physical/microstructural characteristics on the early-age cracking of concrete
This paper provides a unique perspective on early-age concrete by focusing on the types of focused on the methods to control the early-age cracking in concrete
This paper provides a unique perspective on early-age concrete by focusing on the types of early-age cracks, the consequences of early-age cracking, and the modeling and remedial measures for early-age crack, the causes of early-age cracking, the factors influencing the initiation and growth of early-age cracking
Summary
Early-age cracks are defined as cracks that generally develop within the first seven days after the placement of concrete; 60 days can be considered the maximum limit for early-age cracking, accounting for the initiation of cracks at the bottom of the concrete slab that may take more than one week to be visible [1]. Investigated the the mechanisms that cause complex cracking phenomena; they focused on the methods to control assessment methods to quantify the stiffening and hardening behavior of mortar and concrete. This paper provides a unique perspective on early-age concrete by focusing on the types of early-age cracks, the consequences of early-age cracking, and the modeling and remedial measures for early-age crack, the causes of early-age cracking, the factors influencing the initiation and growth of early-age cracking. Oncould the other it provides a comprehensive discussion on the latest findings and identifies some act ashand, a guideline for construction stakeholders for handling the early-age cracking problem research gaps in the area of the early-age cracking in concrete. Is highly practical to cement study the does not includeused any discussion the occurrence and causes of theit early-age cracking in early-age of concrete. It is highly practical to study the early-age cracking phenomenon of concrete
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