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43
Vol

Physicochemical Modifications in Geomaterials and Their Leachates Extracted from Acidic Attack

April 17, 2020
Exposure of geomaterials to acid leachates may cause chemical species desorption, mineral dissolution, and metal leaching. This study seeks to understand the changes in the physicochemical composition of liquid extracts resulting from the exposure of four different geomaterials (uniform fine sand, basalt residual soil, kaolin, and bentonite) to a blank solution ...
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43
Vol

Sample Quality Assessment: Comparison Between Brass Shelby Tubes and Reinforced PVC Tube Samplers

May 20, 2020

Laboratory tests were conducted in soft clay deposits at the Macae/RJ airport in order to obtain geotechnical parameters for a new runway design. The quality of soil samples, extracted with both brass tube (thin-walled) and reinforced PVC tube (thick-walled) soil samplers, was assessed. Both samplers were 700 mm long, with a 7 degree chamfered cutting e...

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43
Vol

Influence of Weathering and Correlations Between Wave Propagation Velocity and Durability with Physical and Mechanical Parameters in Phyllites

April 22, 2020
Ultrasonic longitudinal wave velocity (Vp) and durability are characteristics largely determined in geotechnical evaluations. These properties are useful in the analysis of weathered rocks because they usually have good relationships with physical and mechanical properties of rocks. Additionally, the tests to obtain these parameters are easy to perform. However,...
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43
Vol

Risk management for geotechnical structures: consolidating theory into practice (Pacheco Silva Lecture)

August 03, 2020

This paper intends to consolidate the theory of risk management into practical applications in geotechnical engineering, presenting concepts, clarifying procedures and discussing openly its difficulties and trends. It brings the evolution of the risk concept and its application to engineering, worldwide and in Brazil, showing the trend of risk managemen...

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