Evaluation of Compatibility between Beetle-Killed Lodgepole Pine Pinus Contorta var. Latifolia Wood with Portland CementReportar como inadecuado


Evaluation of Compatibility between Beetle-Killed Lodgepole Pine Pinus Contorta var. Latifolia Wood with Portland Cement


Evaluation of Compatibility between Beetle-Killed Lodgepole Pine Pinus Contorta var. Latifolia Wood with Portland Cement - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1

Ecosystem Science and Management Program, University of Northern British Columbia, 3333 University Way, Prince George, British Columbia, V2N 4Z9, Canada

2

Department of Physics, University of Northern British Columbia, 3333 University Way, Prince George, British Columbia, V2N 4Z9, Canada

3

Chemistry, Environmental Science and Environmental Engineering Programs, University of Northern British Columbia, 3333 University Way, Prince George, British Columbia, V2N 4Z9, Canada





*

Author to whom correspondence should be addressed.



Abstract The compatibility of wood from mountain pine beetle Dendroctonus ponderosa killed lodgepole pine Pinus contorta var. latifolia with Portland cement was investigated based on time-since-death as a quantitative estimator, and the presence of blue-stained sapwood, brown rot, or white rot as qualitative indicators. The exothermic behavior of cement hydration, maximum heat rate, time to reach this maximum, and total heat released within a 3.5–24 h interval were used for defining a new wood-cement compatibility index CX. CX was developed and accounted for large discrepancies in assessing wood-cement compatibility compared to the previous methods. Using CX, no significant differences were found between fresh or beetle-killed wood with respect to the suitability for cement; except for the white rot samples which reached or exceeded the levels of incompatibility. An outstanding physicochemical behavior was also found for blue-stained sapwood and cement, producing significantly higher compatibility indices. View Full-Text

Keywords: compatibility index; hydration; lodgepole pine; Portland cement; wood compatibility index; hydration; lodgepole pine; Portland cement; wood





Autor: Sorin A. Pasca 1, Ian D. Hartley 1,* , Matthew E. Reid 2 and Ronald W. Thring 3

Fuente: http://mdpi.com/



DESCARGAR PDF




Documentos relacionados