Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/11414
Title: Tests of high-range water reducing admixtures
Authors: United States. Army. Office of the Chief of Engineers.
Mather, Bryant.
Keywords: Concrete admixtures
Concrete durability
Concrete mixtures
Concrete tests
Frost resistance
Water reducing agents
Publisher: Concrete Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: CTIAC report ; no. 30.
Description: Miscellaneous paper
Abstract: At the Waterways Experiment Station, four high-range water-reducing admixtures were tested for compliance with the requirements for water-reducing admixtures given in ASTM: C 494-71. None passed the test for frost resistance; all met all other requirements. Water reductions ranged from 18 to 25 percent at recommended dosages. The reference concrete mixtures had durability factors ranging from 57 to 89 (average 76); the test concretes had durability factors ranging from 5 to 77 (average 36). A reference specimen from a batch having DFE = 84 had a bubble-spacing factor (L) of 0.003. Test concretes showed values of L rising from 0.004 to 0.012 as the DFE dropped from 77 to 14, inspite of a proper air content in the freshly mixed concrete.
URI: http://hdl.handle.net/11681/11414
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