Influence of Water Content on the Tribological Behavior at Concrete/Wall Interface – Role of Cement Grains


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Abstract


Each concrete component has a very important role on the tribological behavior in the vicinity of wall surface. The objective of this paper is to understand the influence of the paste volume on the mechanisms intervening at the concrete/formwork. Two concrete with 28 and 34% of paste were formulated in order to study the influence of fines content at the concrete/wall interface. Friction tests were carried out using an apparatus which can reproduce the same conditions of jobsites. Then, three types of mixtures fine elements and the aggregates forming the granular skeleton were prepared to study the effect of water content and aggregates on the interface behavior of fresh concrete. The results show that the friction is governed by the cement grains and its water content. Hypotheses were proposed to explain the different mechanisms occurring at the interface.
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Keywords


Cement Grains; Tribology; Friction; Interface; Fresh concrete; Formwork

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References


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