| Title |
Characteristics of Compressive Strength of Concrete due to Form Curing Condition |
| Authors |
김경남(Kim, Kyoungnam) ; 박상렬(Park, Sangyeol) ; 문경태(Moon, Kyoungtae) ; 심재용(Shim, Jaeyong) |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.1.0019 |
| Keywords |
거푸집;탈형;탈형시기;양생조건;압축강도 Form;Form removal;Time for form removal;Curing condition;Compressive strength |
| 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. |