Air Entrainment in Cement and Silica Pastes


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Title: Air Entrainment in Cement and Silica Pastes

Author(s): G. M. Bruere

Publication: Journal Proceedings

Volume: 51

Issue: 5

Appears on pages(s): 905-919

Keywords: no keywords

Date: 5/1/1955

The air-entraining capacities of a number of surface-active agents in cement and silica pastes were measured by a standard test procedure. In addition, measurements were made of the foaming properties of surface-active agent solutions with and without electrolyte additions, and of the abilities of surface-active agents to make cement and silica particles hydrophobic by adsorption so that air bubbles adhere to them. These sets of data were used to demon-strate the conditions governing the formation of stable, air-entrained pastes containing surface-active agents, and the mechanisms by which air bubbles are introduced into and retained in pastes.