Title: Controlling the Consistency of High-Performance Concrete by Mixing Torque in the Ready-Mixed Concrete Plant

Author(s): N. Nishiyama

Publication: Symposium Paper

Volume: 149

Issue:

Appears on pages(s): 633-648

Keywords: admixtures; flowability; high-performance concretes; loads (forces); mixing time; quality control; torque; water-cement ratio; Manufacturing

DOI: 10.14359/4259

Date: 10/1/1994

Abstract:
Mixing torque is highly related to the consistency of concrete. A high-performance concrete with a unit amount of water as low as 165 kg/m 3 is viscous and exhibits higher torque at mixing, and the decrease in torque with the mixing time is not so great. Flowing concrete, a high-performance concrete with high flowa bility, with a unit amount of water of 180 kg/m 3 shows characteristic low viscosity on the contrary, which may require more practical consistency control. Paper proposes a new method of controlling the consistency of high-performance concrete by means of load current at the ready-mixed concrete plant.