Analysis of Friction and Lubrication Conditions of Concrete/Formwork Interfaces

Concrete friction plays a basic role throughout numerous stages of construction and structure operations, together with pumping, formwork filling and also the production of facings. A tribometer for fluid materials has therefore been developed to higher study this friction. Tests performed with sure modifications of interface conditions show that friction is ruled by surface characteristics (e.g. kind of demoulding agent, roughness, velocity, pressure). The investigation showed that the tribometer is sensitive to get a true understanding of the mechanical behaviour of the Self-Consolidating Concrete (SCC). The tests and observations created reveal that friction mechanisms rely on the properties of the interface. The interface seems to endure 2 forms of phenomena that rely of the pressure. The demoulding oil generates a discount of the friction between the SCC and also the formwork. Parameters specific to facing look also are addressed during this paper.