Porous Aggregate

Porous Aggregate

 

(lightweight aggregate), natural or artificial bulk stone material of porous structure with a density of not more than 1,200 kg/m3, used in modern civil engineering to make lightweight concretes.

References in periodicals archive ?
Tenders are invited for Work includes approx 11,342 SY of remove and disposal of bituminous pavement (full depth 4"); 7,223 CY of unclassified excavation; 500 CY of muck excavation; 10,587 SY of geotextile fabric; 6,291 CY of subbase course; 1,368 CY of aggregate base course; 2,297 ton of plant mix bituminous pavement (4"); 754 gal of bituminous tack coat; 500 LF of crack sealing; 2,175 SF of taxiway painting; 1,012 LF of 4" perforated PVC pipe underdrain with sock; 750 CY of porous aggregate #2 drainage course; 316 SY of concrete valley gutter(6"); 0.
Guan, "Internal curing of mortar with low water to cementitious materials ratio using a normal weight porous aggregate," Construction and Building Materials, vol.
The addition of 12% dispersion into the batch of water probably seals both the porous aggregate and capillaries in silicate admixtures and the concrete permeability for water is limited to the cement paste only.
The nets, to be made of hard porous aggregate with "Cricketweave" carpet for the batting and bowling ends, will complement the club's existing indoor nets.
A phenomenon of water absorbed by porous aggregate, which then moving out into the hardened cement paste when concrete is already dry, could continuously present moisture in hardened concrete without treatment on the concrete surface.
Bychkov of the Russian Academy of Sciences' Institute for High Temperatures in Moscow proposed that ball lightning consists of a loose, porous aggregate of particles.
Recently patented is a synthetic turf made from a sub-surface layer, a porous aggregate layer over the sub-surface layer and a pile fabric over the porous aggregate layer.
Meanwhile, Mack mixes his cement with run-of-the-mill, crack-prone, porous aggregate.
In the case of lightweight concrete swelling is caused not only by absorption of water from the external environment, but also from internal reservoirs in the form of initially moistened porous aggregate.
1) The addition of fine aggregate to coarse aggregate matrix at minimum porosity results in mixtures that do not fulfill the minimum requirement for permeability for some porous aggregate gradations.
1): porous aggregates obtained from the natural aggregates of the powder, and dense aggregates obtained from powders compressed at 200MPa and broken by ball milling.
The reactive material was sepiolite, from Vallescas in Spain, supplied as porous aggregates (Berk Mineral Products, Worksop, $81 7QQ, UK).