Method of preparing concrete mixtures

US4335966A · kind A · utility

Assignee

• Elba-Werk Maschinengesellschaft mbH & Co. · DE

Inventors

• Joachim Rapp · Stuttgart, DE
• Peter Bittmann · Gaggenau, DE

Key dates

• Filing date: Dec 19, 1980
• Grant date: Jun 22, 1982
• Expiry date: Dec 19, 2000

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/048
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A process for adding water to a concrete mix wherein, after addition of an initial quantity of water to bring a particular concrete mix to or close to a so-called zero consistency, the set point consistency is reached by the one-shot addition of the balance of the water determined from stored empirical and interpolated data based upon measuring consistency and water addition values. The method has the advantage that the establishment of a zero value consistency by the addition of water to the dry mix or a mix of unknown moisture content permits the consistency measurement at this point to be easily carried out by indirect electrical techniques.