air-entrained concrete


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air-entrained concrete

n
(Civil Engineering) a low-density type of concrete throughout which small air bubbles are dispersed in order to increase its frost resistance: used for making roads. With 1 per cent of air, the loss of strength is approximately 5 per cent
References in periodicals archive ?
The document explains that while air content is reported in the mix design submitted for air-entrained concrete and gauged in the field for compliance, air content measurements are rarely specified or performed for non-air-entrained concrete.
Solutions as to limit water-cement ratio, to increase concrete cover thickness, and to apply air-entrained concrete were proposed [8].
Based on this, air-entrained agent is added to the concrete to make air-entrained concrete. One of the advantages of air-entrained concrete is its greater resistance to damage caused by freeze-thaw cycles [10-12] which make it especially suitable in the construction of dam, long span bridges, and offshore oil platforms in cold environment.
The effects of action of freeze/thaw cycles on air-entrained concrete and plain concrete are well documented and many researchers have documented the improvement on the freeze/thaw resistance of air-entrained concrete over plain concrete [13-19].
(2000), 'Reduction in water demand of non air-entrained concrete incorporating large volume of fly ash', 'Cement and Concrete Research.30, ,pp.
As a result of considerable flowability of a self-compacting concrete mix, air bubbles present in air-entrained concrete mix can be unstable, which is caused by floating of large air bubbles, fading of air bubbles that are less than 0,10 mm in diameter, or coalescence of air bubbles.
In cold climates, order air-entrained concrete to help the concrete survive freeze/thaw cycles.
In the base of its findings, the firm has found that concrete damage did not usually occur when ice melter was applied as directed and used on good quality, air-entrained concrete designed for cold weather climates.
To avoid excess moisture, slightly reduce the amount of water used in the mix or use air-entrained concrete. Knowing the proper consistency of a mix comes with experience.
Wawrzenczyk and Kozak proposed a new description for the air-void structures in air-entrained concrete using a protected-paste volume (PPV) parameter.
By eliminating the need for air-entrained concrete and establishing a 1 percent MasterSphere FT 300 target volume, the new system invites fine and coarse aggregate optimization at the expense of higher cost binder.