Research Article | OPEN ACCESS
Physical and Mechanical Properties of Cement Grouts Mixed with Different Super Plasticisers
Costas A. Anagnostopoulos and Christos Echonomidis
Department of Civil Engineering, School of Technological Applications, Alexander Technological Educational Institute of Thessaloniki, 57400 Thessaloniki, Greece
Research Journal of Applied Sciences, Engineering and Technology 2015 2:235-246
Received: January 25, 2015 | Accepted: February 14, 2015 | Published: May 20, 2015
Abstract
The use of super plasticisers in microfine or regular cement-based grouts has become of vital importance in advanced professional grouting practices. These super plasticisers play an important role in the production of more durable grouts with improved rheological characteristics. This report presents a laboratory study of the effects of a new-generation Polycarboxylate Super Plasticiser (PCE) on the rheological properties, mechanical strength, final setting time and bleeding of cement grouts in comparison to that of a polynaphthalene (SNF) and a modified Lignosulfonate (MLS) superplasticisers. The experiments were conducted using different super plasticiser dosages with cement grouts proportioned with a water to cement ratio (w/c) of 0.33, 0.4 or 0.5. The results showed that grouts with PCE had higher viscosity, slightly increased bleeding and longer setting times compared with the SNF admixture. However, the PCE improved the final strength, especially for grouts with a w/c ratio of 0.4 and 0.5 and decreased the yield stress. Among the three super plasticisers, MLS had the less effect on improving the different properties of the grouts.
Keywords:
Grouts, lignosulfonate, polycarboxylate ether, sulfonated naphthalene formaldehyde,
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The authors have no competing interests.
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