ABSTRACT

Impregnation of an appropriate chemical compound in wood is a common technique to improve durability, fire retardant properties, strength and dimensional stability, increase hardness and UV resistance. This study investigated a compression treatment followed by dipping in Alkaline Copper Quaternary solution (ACQ) as an alternative treatment method of green (unseasoned) southern pine timber. The effects of the compression parameters on ACQ uptake were investigated. The results showed that ACQ uptake increased disproportionally from 24 to 225 L/m³ with the increase of the compression ratio from 10% to 50%. ACQ uptake increased gradually from 65 to 120 L/m³ at a compression speed between 5 and 40 mm/min and dropped to 46 L/m³ for a compression speed of 50 mm/min. Radial compression resulted in a lower uptake than 45° and tangential compression. The penetration depth of Cu was satisfactory for most of the sapwood specimens for a compression ratio greater than 30%. For the heartwood/sapwood mixed specimens, 100% Cu penetration was achieved in the sapwood portion however the heartwood portion remained unpenetrated. The compression treatment could potentially reduce the treated timber cost by reducing drying cost and processing time while achieving a satisfactory performance as specified by the Australian standard.

摘要

在木材中浸渍适当的化合物是提高耐用性、阻燃性能、强度和尺寸稳定性、增加硬度和抗紫外线性的常用技术。本研究调查了压缩处理后浸渍在碱性铜第四纪溶液 (ACQ) 中作为绿色（未风干）南方松木材的替代处理方法。研究了压缩参数对 ACQ 吸收的影响。结果表明，随着压缩比从 10% 增加到 50% ，ACQ 吸收量从 24 L/m 3 不成比例地增加到 225 L/m ^{3 。}ACQ 吸收在 5 至 40 毫米/分钟的压缩速度下逐渐从 65 升至 120 升/米³并降至 46 升/米³压缩速度为 50 毫米/分钟。径向压缩导致吸收低于 45° 和切向压缩。对于压缩比大于 30% 的大多数边材试样，Cu 的渗透深度令人满意。对于心材/边材混合试样，在边材部分实现了 100% 的铜渗透，但心材部分仍未渗透。压缩处理可以通过减少干燥成本和加工时间来降低处理木材的成本，同时达到澳大利亚标准规定的令人满意的性能。