PROPERTIES OF SELF-COMPACTING CONCRETE

An experimental investigation of self-compacting concrete, SCC, with high performance, hp, is outlined. For this purpose optimisations were performed on a laboratory scale according to the principle of an ideal grading curve of the particles in the fresh concrete for SCC, with high strength, high durability in marine environment or with fire spalling safety. SCC was introduced in the full-scale production of beams and piles. The results showed slump flow around 700 mm and high robustness that allowed for a variation of the water-cement ratio, w/c, ± 0.02 keeping the fresh concrete properties within the limits of the full-scale factory production even at elevated temperature, 28°C. Creep, shrinkage, salt frost scaling and sulphate resistance did not differ much from the corresponding properties of VC. Internal frost resistance was improved for SCC compared with VC but the chloride migration was larger in SCC with limestone powder than in VC. Spalling of the concrete that occur during fire, especially in concrete with low w/c, was avoided by use of polypropylene fibre.

• INTRODUCTION

• MATERIALS AND METHODS

• RESULTS

• DISCUSSIONS

• CONCLUSIONS

• ACKNOWLEDGEMENT

• REFERENCES

• APPENDICES