Pasca Sorin A, Hartley Ian D, Reid Matthew E, Thring Ronald W
Ecosystem Science and Management Program, University of Northern British Columbia, 3333 University Way, Prince George, British Columbia, V2N 4Z9, Canada.
Department of Physics, University of Northern British Columbia, 3333 University Way, Prince George, British Columbia, V2N 4Z9, Canada.
Materials (Basel). 2010 Dec 17;3(12):5311-5319. doi: 10.3390/ma3125311.
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.
基于死亡时间这一定量估计指标以及边材蓝变、褐腐或白腐的存在这一定性指标，研究了山松甲虫（Dendroctonus ponderosa）致死的扭叶松（Pinus contorta var. latifolia）木材与波特兰水泥的相容性。水泥水化的放热行为、最大热速率、达到该最大值的时间以及在3.5 - 24小时间隔内释放的总热量用于定义一个新的木材 - 水泥相容性指数（CX）。与先前方法相比，CX的开发考虑到了评估木材 - 水泥相容性方面的巨大差异。使用CX，在新鲜木材或甲虫致死木材对水泥的适用性方面未发现显著差异；除了白腐样本达到或超过不相容水平外。对于边材蓝变和水泥，还发现了出色的物理化学行为，产生了显著更高的相容性指数。
