Chord length measurements are used to estimate the volumetric distribution of air
voids within hardened concrete samples. The accuracy of the Linear-Traverse method is
questionable because chord lengths do not directly represent the actual volumes of the air voids.
Using computer simulation, randomly generated concrete samples were analyzed using the
Linear-Traverse method to compute the distribution of air voids, the chord length gradation
curve, the chord length-to-traverse ratio, and the air void volume gradation curve. The current
chord-length approach significantly underestimated the air void content. A method that
estimates that air void gradation curve from the chord length gradation curve is presented. The
computer simulation results are supported by a conceptual analysis. To obtain the most accurate
estimate of the air void content, computer analyses showed that at least 15 traverse lines should
be regularly spaced on the concrete sample.

Creator(s)

• BEASMAN , L.E.
• MCCUEN, R.H.

Contributor(s)

-

Publisher

Universitas Kristen Petra; 2011

Language

English

Category

jou – Journal

Sub Category

-

Source

Civil Engineering Dimension, Vol. 13, No. 1, March 2011, 15-20; Beasman, L.E. (NA00000791) ), McCuen, R.H. ( )

Subject(s)

• AIR VOIDS

File(s)

• jiunkpe-ns-jou-2011-na00000791-17498-air_voids-resource1.pdf