Cesar Gerardo Freyre-Pinto and Jennifer E. Tanner
i Research assistant, University of Wyoming, Laramie, WY, USA, cfreyrep@uwyo.edu
ii Professor, University of Wyoming, Laramie, WY, USA, tannerj@uwyo.edu
ABSTRACT
The University of Wyoming masonry design class has a robust laboratory component. Groups of students construct 6-unit stack brick masonry prisms A suite of three specimens were subjected to a 4-point beam test as described in ASTM E518. These tests fail in the center with two 3-unit brick prisms remaining. Both prisms are placed within a bond wrench apparatus in accordance with ASTM C1072. Each prism provides another four measurements of bond strength (two per prism half). Test data indicates that the beam test (ASTM E518) is higher than the average measured by the bond wrench test (ASTM C1072). A statistical analysis was performed to verify the significance of this difference. Although the p-value was higher than the significance level (T(2)=2.05, p-value=0.088), the statistical effect size was found to be of practical importance (d=1.19).
KEYWORDS: Tensile bond strength, brick prism, beam test, bond wrench test, statistical evaluation.
169-Pinto.pdf
