System for testing and inspecting concrete

• US 5,262,967 A
• Filed: 07/15/1991
• Issued: 11/16/1993
• Est. Priority Date: 07/15/1991
• Status: Expired due to Fees

• Current Assignee: Braun Intertec Engineering Incorporated
• Original Assignee: Braun Intertec Engineering Incorporated
• Inventors: Jaber, Tarif M., Pearson, Kim A.
• Primary Examiner(s): Harvey, Jack B.
• Assistant Examiner(s): BUROKER, BRIAN
• Application Number:
  US07/729,566
• Time in Patent Office: 855 Days
• Field of Search: 364/550, 364/551.01, 364/552, 356/378
• US Class Current: 702/35
• CPC Class Codes: G01N 33/383 Concrete or cement

Abstract

A system and method for determining the air-void or aggregate content of a concrete specimen according to the point count and modified point count method utilizing coordinate data collected during linear traverse method inspection. A computer operates a computer driven stage containing the concrete specimen under a microscope, whereby positional data is transmitted to the computer. The computer controls the linear traverse pattern of the stage under the microscope, although the operator has the option to manually increase or decrease the traverse rate during the inspection cycle. The computer automatically records linear traverse coordinate data for the entire traverse pattern. An operator records in the computer beginning and ending coordinate data for air-voids or aggregates encountered on the traverse pattern from which the air-void or aggregate content is calculated according to the linear traverse method. The computer then calculates the air-void content according to the point count and modified point count methods using the linear traverse coordinate data and the beginning and ending coordinate data of air-voids recorded by the operator.

Claims

1. A system for inspecting a concrete specimen for air-void content according to the modified point count method utilizing coordinate data collected during linear traverse method inspection, comprising:

(a) a computer;

(b) a microscope with targeting cross hairs;

(c) a computer driven stage with positioning encoders attached to said computer driven stage, whereby positioning data is transmitted to said computer;

(d) means of fixing said specimen on said computer driven stage and initializing said specimen to a coordinate system in said computer;

(e) means for traversing said specimen under said microscope in a linear traverse pattern, whereby linear traverse coordinate data is recorded in said computer;

(f) means for recording in said computer beginning and ending coordinate data for said air-voids on said traversed specimen;

(g) means for calculating said air-void content according to said linear traverse method; and

(h) means for calculating the air-void content according to said modified point count method using said linear traverse coordinate data and said beginning and ending coordinate data of said air-voids.

2. The system for inspecting a concrete specimen for air-void content according to claim 1, further comprising means for calculating the air-void content according to said modified point count method using said linear traverse coordinate data and said beginning and ending coordinate data of aid air-voids for a localized area of said concrete specimen.

3. A system according to claim 1, further including means for calculating the air-void content according to a point count method using said linear traverse-coordinate data and said beginning and ending coordinate data of said air-voids.

4. A system for inspecting a concrete specimen for aggregate content according to the modified point count method utilizing coordinate data collected during linear traverse method inspection, comprising:

(a) a computer;

(b) a microscope with targeting cross hairs;

(c) a computer driven stage with positioning encoders attached to said computer driven stage, whereby positioning data is transmitted to said computer;

(d) means of fixing said specimen on said computer driven stage and initializing said specimen to a coordinate system in said computer;

(e) means for traversing said specimen under said microscope in a linear traverse pattern, whereby linear traverse coordinate data is recorded in said computer;

(f) means for recording in said computer beginning and ending coordinate data for said aggregates on said traversed specimen;

(g) means for calculating said aggregate content according to said linear traverse method; and

(h) means for calculating the aggregate content according to said modified point count method using said linear traverse coordinate data and said beginning and ending coordinate data of said aggregates.

5. The system for inspecting a concrete specimen for aggregate content according to claim 4, further comprising means for calculating the aggregate content according to said modified point count method using said linear traverse coordinate data and said beginning and ending coordinate data of said aggregates for a localized area of said concrete specimen.

6. A system according to claim 4, further including means for calculating the aggregate content according to a point count method using said linear traverse coordinate data and said beginning and ending coordinate data of said aggregates.