| Title |
Determination of the Period for the Strength Correction of the Concrete with the Temperature Level at Each Region in Korea |
| Keywords |
Strength Correction ; KASS ; Korea Meteorological Administration ; Blending Cement ; Fly Ash ; Blast Furnace Slag |
| Abstract |
At the phase of determining concrete strength, strength correction with each temperature level should be included to secure target strength at 28 days in low temperature according to KASS-5, In this paper, the period for the strength correction at the stage of mixture design of the concrete using ordinary Portland cement(OPC), fly ash cement(FAC) and blast furnace slag cement(BSC) was determined with each region of south Korea based on the meteorological data of KMA(Korea meteorological administration) by applying KASS-5. At 28 days of strength control age, the period for 6MPa was calculated to 50～60 days and, with 3 MPa. to around 80 days in OPC mixture. The use of FAC and BSC had also more than 100 days. The period for the strength correction was shown to be decreased with the rise of altitude. The period to consider the delay of the strength development due to low temperature including the period of cold weather concrete was nearly 7 months around 1 year regardless of cement types. References for determining the strength correction factors with each region of south Korea was provided in this paper. |