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http://dx.doi.org/10.12652/Ksce.2018.38.1.0019

Characteristics of Compressive Strength of Concrete due to Form Curing Condition  

Kim, Kyoungnam (Jeju Special Self-Governing Province Council)
Park, Sangyeol (Jeju National University)
Moon, Kyoungtae (Jeju National University)
Shim, Jaeyong (Dongnam Construction Co.)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.38, no.1, 2018 , pp. 19-28 More about this Journal
Abstract
The time for form removal is an important factor for ensuring the safety and economical efficiency of concrete structures, because it affects the quality, period, and cost of construction. Although local specifications suggest the form curing time, there is a problem of low quality of concrete due to early removing of form. This is because they do not fully understand effect of curing condition, and they want to shorten construction period in the field. Therefore, this research evaluates the effect of curing condition according to the time for form removal by testing specimen. As a result, the concrete compressive strength at the age of 28 days decreased about 40% in the condition of form removal after 12 hours, while the strength in the condition of form removal after 28 days decreased about 7%. Finally, this paper suggests an estimating equation for the concrete compressive strength due to the time for form removal considering various curing temperatures as equivalent ages. The proposed equation can be used in the field for evaluating the strength after form removal.
Keywords
Form; Form removal; Time for form removal; Curing condition; Compressive strength;
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