| Title |
The Quality Properties of Self Consolidating Concrete Using Lightweight Aggregate |
| Keywords |
self-consolidating concrete;lightweight aggregates;segregation resistance;dry shrinkage;carbonation depth;자기충전 콘크리트;경량골재;재료분리저항성;건조수축;탄산화 |
| Abstract |
This paper presents the development of self-consolidating concrete (SCC) using lightweight aggregates. SCC using Light-weight aggregate properties have been evaluated in terms of flowability, segregation resistance and tilling capacity of fresh concrete as per the standards of the Japanese Society of Civil Engineering (JSCE). The measurement of the mechanical properties of hardened SCC using lightweight aggregate, including compressive strength, splitting tensile strength, elastic moduli and density, as well as its dry shrinkage and carbonation properties were also carried out. The characteristics of SCC using lightweight aggregate at the fresh state showed that as the use of the lightweight aggregate, the flowability improves without exception of Mix No.9 but the segregation resistance tends to decrease without exception of Mix No.3, 4 and 5. The 28 days compressive strength of the SCC using lightweight aggregate was found to be 30㎫ or higher. The relationship between the compressive strength and the splitting tensile strength was found to be similar to the expression presented by CEB-FIP, and the relationship between the compressive strength and the elastic moduli was found to be similar to the expression suggested by ACl 318-08 which takes into consideration the density of concrete. The density of the SCC using lightweight aggregate decreased by up to 26% compared to that of the control SCC. Also, The dry shrinkage and carbonation depth of the see using lightweight aggregate increased compared to that of the control SCC. |