In-situ measurement of formwork pressures generated by Self-Compacting Concrete

摘要

Self-Compacting Concretes (SCC) are a special category of concretes and directions for designing formwork relative to ordinary concretes do not apply to them. In this paper an experimental study on formwork pressure exerted by SCC is reported. The behaviour of the SCC was investigated in instrumented formworks provided for two different types of pressure sensors: common diaphragm pressure transducers and dilatometer cells. In situ measurements of formwork pressure were carried out on walls and concrete columns 6m and 9m high, 0.30m thick and 2.50 or 0.50m wide respectively. Successfully, both types of sensor were in agreement describing the continuous time variation of the pressures.