Accessible Requires Authentication Published by De Gruyter December 11, 2015

The impact of consolidation and interparticle forces on cohesive cement powder

Djamel Turki, Nouria Fatah and Messaoud Saidani

Abstract

Cement powder particles of micronic size tend to form agglomerates due to the influence of interparticle forces (Van der Waals forces). The formation of agglomerates results in an increased air-void in the solid structure (aerated powder) requiring an increase in water demand to sustain the feasibility of the structure. Consequently, if the compound formed is not stabilized, it would have low mechanical strength that may result in cracking of hardened cement. In this study, the results of cement powder consolidation and its flow properties show that its behaviour is controlled by internal forces (Van der Waals) and external forces (elastic and plastic). These forces have a direct influence on the powder structure, leading to a variable packing behaviour (void reduction). Consolidated cement powder shows a decrease in the void structure leading to a more efficient material. This study intends to determine the impact of interaction forces between cement particles during consolidation.


*Correspondence address, Dr. Djamel Turki, Université Ibn-Khaldoun deTiaret, Laboratoire de Génie électrique et des plasmas, BP 78, 14000 Tiaret, Algeria, Tel.: +213 664119700, Fax: +213 46410225, E-mail: , Web: www.univ-tiaret.dz

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Received: 2015-04-24
Accepted: 2015-08-17
Published Online: 2015-12-11
Published in Print: 2015-12-08

© 2015, Carl Hanser Verlag, München