PORTLAND CEMENT COMPOSITION HAVING AN ACCELERATED SET

• US 3,656,985 A
• Filed: 12/01/1970
• Issued: 04/18/1972
• Est. Priority Date: 12/02/1969
• Status: Expired due to Term

• Current Assignee: Bernard Bonnel, Christian Hovasse
• Original Assignee: Bernard Bonnel, Christian Hovasse
• Inventors: Bonnel, Bernard, Hovasse, Christian
• Primary Examiner(s): Levow, Tobias E.
• Assistant Examiner(s): Scott, W. T.
• Application Number:
  US05/094,157
• Time in Patent Office: 504 Days
• Field of Search: 106/90,95,314,315
• US Class Current: 106/728
• CPC Class Codes: C04B 2103/12 Set accelerators
• CPC Class Codes: C04B 22/00 Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators , shrinkage compensating agents
• CPC Class Codes: C04B 22/0093 Aluminates
• CPC Class Codes: C04B 24/06 containing hydroxy groups
• CPC Class Codes: C04B 28/04 Portland cements

Abstract

A composition for quickening the setting of Portland cement constituted by 0.5 - 5 parts of alkali aluminate and 0.05 - 2 parts of hydroxylated organic acid.

Claims

2. Composition according to claim 1 in which said aluminate has a ratio MeO2/Al2O3 comprised between 1 and 4, wherein Me is an alkali metal.

3. Composition according to claim 2 wherein said ratio is 1 to 2.

4. Composition according to claim 1 in which hydroxylated organic acid is selected from the group consisting of tartaric, citric, gluconic, malic, lactic and salicylic acids.