Structural lightweight concrete or mortar, method for manufacturing same and use thereof as self-placing concrete
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United States of America Patent
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May 31, 2016
Grant Date -
Nov 13, 2014
app pub date -
Nov 30, 2012
filing date -
Dec 1, 2011
priority date (Note) -
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Abstract
Disclosed is a structural lightweight concrete or mortar composition which, in the fresh state, includes an hydraulic binder, aggregate, and water, characterized in that the composition includes: an hydraulic binder content including cement and optional additions, which is greater than or equal to 280 kg/m3 of fresh concrete, coarse aggregate and/or fine aggregate, a volume proportion of at least 70% of the fine and/or coarse aggregate consisting of fine and/or coarse lightweight particles, the actual dry density of which is between 800 and 1,600 kg/m3, the total amount of aggregate being greater than or equal to 500 L/m3 of fresh concrete, a superplasticizer, at least one thickening agent, and effective water in an effective water/hydraulic binder weight ratio of between 0.40 and 0.65. The composition can be used for producing a self-placing lightweight concrete.
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