Concrete slump testing

Details Concrete slump testing Concrete slump testing

1994-02-22

1995-08-01

Chilcot, Jr., Richard E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

73 5401, G01N 1102

Patent

active

054371813

ABSTRACT:
A slump tester for concrete includes a testing unit and a measuring unit. The testing unit includes a tube with a perforated lower section that is lowered into the concrete to be tested up to the level of a disc carried on the tube. A timer button on the measuring unit is pushed to initiate a timer. After a preset time, an alarm sounds and the rod-like measuring unit is lowered into the tube until contact is made with the concrete that has entered the testing unit. This is indicated by a dot appearing in a digital display on the upper end of the measuring unit. The depth to which the rod has been lowered into the tube is monitored using an induction coil wound on the upper part of the rod and a metal cylinder in the upper end of the testing unit. The inductance of the coil varies linearly with the degree of insertion and this is used to generate a signal representing the slump of the concrete, which is displayed on the measuring unit display. The measuring unit also includes a temperature sensor near the bottom end of the rod so that temperature can also be displayed on the measuring unit.

REFERENCES:
patent: 2422634 (1947-06-01), Riepert et al.
patent: 3492857 (1970-02-01), Bosco et al.
patent: 3863494 (1975-02-01), Nasser
patent: 4332158 (1982-06-01), Osborne
patent: 4530235 (1985-07-01), Shabel
patent: 4801865 (1989-01-01), Miller et al.
patent: 4866997 (1989-09-01), Kaufman
K. W. Nasser, "New and Simple Tester for Slump of Concrete", ACI Journal, Oct. 1976, pp. 561-565.
K. W. Nasser, "A New Method for Evaluatiion of the Slump of Concrete", ACI Journal Special Publication, SP 144-27, Mar. 1994, pp. 575-587.

Affiliated with

Also associated with

Rating

Concrete slump testing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Concrete slump testing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Concrete slump testing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-728199