Influence of Molding Moisture Content and Porosity/Cement Index on Stiffness, Strength, and Failure Envelopes of Artificially Cemented Fine-Grained Soils
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 5
Abstract
An effort is being carried out to encompass the influence of molding moisture content () on the dose procedures aimed at binder enhanced fine-grained soils built on sound criteria. The porosity/cement index () plays an essential role in initial shear stiffness (), tensile (), and compressive () strength, and triaxial failure envelope parameters determination. This study aims to assess , , , and relationships of fine-grained soils treated with distinct cement amounts, distinguishing dry densities and different molding moisture contents to show that the effect of distinct structures because of the influence of moisture content and the porosity/cement index play a major function in establishing stiffness and resistance of fine-grained materials. The ruling factors assessed were molding moisture content and adjusted porosity/cement index. Ultrasonic pulse velocity, unconfined compression, split tensile and drained triaxial tests were performed in current research. Higher values of parameters , , and are observed with the rise of binder content and reduction of porosity of the compacted mixture. In addition power functions are used to represent these interaction diagrams relating , , or with cement content or porosity/cement index. Therefore, the porosity/cement index is shown to be suitable to evaluate , , and of the fine-grained soil-binder blend studied. ends to be independent of parameters and for the fine-grained soil-cement studied. Distinctive relations between and of the silt-cement mixtures are presented for every moisture content considered, connecting stiffness and resistance.
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Acknowledgments
The authors wish to express their gratitude to Brazilian Research Council CNPq/MCT (Projects Produtividade em Pesquisa Grant # 302269/2015-0, Edital Universal Grant # 404791/2016-6 and PDJ Grant # 406163/2015-4) and to PETROBRAS for their financial support to the research group.
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©2016 American Society of Civil Engineers.
History
Received: Apr 29, 2016
Accepted: Sep 13, 2016
Published online: Nov 17, 2016
Discussion open until: Apr 17, 2017
Published in print: May 1, 2017
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