| 摘要 |
PURPOSE:To obtain a foam-containing concrete having excellent foaming properties, fineness and stability in a cement composition system, by using a foam- entraining agent having a specific chemical composition. CONSTITUTION:This foam-entraining agent for concrete is shown by the general formula R1O(AO)nCH2COOX [R1 is a 6-26C alkyl or a group of formula I; R2 is H or a 1-9C alkyl; AO is a 2-3C oxyalkylene group; (n) is 1-100; X is H, an alkali (alkaline earth) metal, ammonium, an alkylammonium, or a substituted alkylammonium]. The foam-entraining is optionally mixed with a cement admixture and further an antifoaming agent. The cement admixture used with the foam-entraining agent is selected from a naphthalenesulfonic acid formaldehyde condensate, a melamine sulfonate formaldehyde condensate and a ligninsulfonate. The foam-entraining agent is used for cellular concrete, as a foaming agent for ALC or for a concrete composition mixed with fly ash. |
