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Investigation finds Samarco dam failed due to liquefaction

Published 30/08/2016, 04:56 am
© Reuters.  Investigation finds Samarco dam failed due to liquefaction
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BELO HORIZONTE, Brazil, Aug 29 (Reuters) - An investigation launched by Brazilian miner Samarco, and its owners Vale SA VALE5.SA and BHP Billiton BLT.L , into the cause of a dam spill last November found the dam collapsed due to liquefaction, a presentation said on Monday.

Liquefaction is a process whereby a solid material such as sand loses strength and stiffness and behaves more like a liquid. Norbert Morgenstern, a geotechnical engineering professor that presented the results, said liquefaction occurred because sand in the tailings dam was "loose, uncompacted and saturated."

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