Study on Filling Capacity of Self-Consolidating Concrete for Modular LNG Storage Tank

모듈형 LNG 저장탱크용 자기 충전 콘크리트의 충전 성능평가 실용화 연구

Abstract

The purpose of this study is to evaluate the practical application of the self consolidating concrete for the steel concrete pannel (SCP) in module LNG storage tank proposed in the previous research. We evaluated the physical properties and filling performance of developed concrete for the SCP module. First, a slump flow test was conducted to evaluate the performance of the proposed guidelines for the filling test. As a result, all of the concrete used showed satisfactory performance. Based on the results of the previous study, it was found that the reliability of the required time measured by the $T_{500}$ test and the rheometer results measured before and after pumping was 0.94 which means the separation and blocking should not occur. The L-box test and the U-box test were conducted before and after pumping. All of the guidelines suggested showed satisfactory performance. SCP module for LNG storage tanks was fabricated on actual size scale to evaluate the practical application at the final site. As a result, it was confirmed that satisfactory filling performance was obtained in all the specimens.

Fig. 1. Steel concrete panel(SCP) module.

Fig. 2. Fill-Box test.

Fig. 3. Concrete rheometer(ICAR).

Fig. 4. Relationship between T₅₀₀ and plastic viscosity.

Fig. 5. Slump flow test.

Fig. 6. Relationship between T500 and plastic viscosity(Included before and after pumping).

Fig. 7. Passing ability tests.

Fig. 8. Manufactured SCP module.

Fig. 9. Concrete cast.

Fig. 10. Demolding of SCP modules after curing.

Table 1. Concrete mixing ratios

Table 2. Guideline for self consolidating concrete

Table 3. Test results of filling test

Table 4. Chemical & physical properties of materials

Table 5. Test results of slump flow test & rheology test

Table 6. Test results of passing ability tests