Effect of Cement/Wood Ratio on Bending Properties of Cement-Bonded Southern Pine Excelsior Board

Andy W. C. Lee


The price of southern pine excelsior is much higher than that of Portland cement on the weight basis. This study was undertaken to investigate the possibility of using more cement and less excelsior in order to reduce the manufacturing cost of cement excelsior board (CEB). The experimental boards were made at three cement/wood (oven-dry weight basis) ratios: 2.0/1, 2.3/1, and 2.6/1. The results indicated that the bending properties of CEB made at these cement/wood ratios met the requirements of commercial standards. However, the increase of cement/wood ratio above 2.0/1 had an adverse effect on bending properties of CEB.


Cement excelsior board;southern pine;Portland cement;cement/wood ratio;bending properties

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