vacuum mat

vacuum mat

[′vak·yəm ‚mat]
(civil engineering)
A rigid flat metal screen faced by a linen filter, the back of which is kept under partial vacuum; used to suck out surplus air and water from poured concrete to produce a dense, well-shrunk concrete.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
Japanese design company Paionia Furyokuki has come up with the product, naming it the Air Vacuum Mat. While its spring brushes scrape out the dirt, the air vacuum sucks it out thoroughly.
Also, try to vacuum mats, carpets and upholstery every week to get rid of dust.'