The Squeezing Test: A Tool to Identify Firm Cement-Based Material's Rheological Behaviour and Evaluate Their Extrusion Ability

Squeeze tests are used as a technique to determine the flow properties of highly concentrated suspensions. The authors used a squeeze test as a rheological behavior identification tool of cement-based materials to evaluate their extrusion ability. Experimental flow curves were obtained for firm cement pastes and fine sand firm mortars using two different compression speeds. These tested products are considered as frictional plastic materials. Using the proposed testing method, two important aspects are discussed. First, the study shows that the mortars bulk and apparent friction factors increase with sand addition proportion. Second, the cement paste's apparent yield shear stress increases at low compression speed due to fluid drainage through the granular skeleton and sample hardening. Some pictures obtained after squeezing test are used to illustrate this drainage phenomenon. Finally, some mortar mix design indications are proposed according to extrusion criteria based on rheological conditions. This study introduced the squeeze test as an extrusion-ability-identifying tool. It is concluded that firm cement pastes and firm fine sand mortars rheological behaviors are speed dependent.

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  • Authors:
    • Toutou, Zahia
    • Roussel, Nicolas
    • Lanos, Christophe
  • Publication Date: 2005-10

Language

  • English

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Filing Info

  • Accession Number: 01010997
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 22 2005 8:47PM