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本文利用三种不同浓度ACQ防腐剂对扭叶松蓝变木材进行浸注处理,其浓度分别为1.2%、2.0%和2.8%。研究其抗弯弹性模量、抗弯强度、冲击韧性和顺纹剪切强度(弦面)与未处理蓝变木材相应力学性能的差异,测试标准参照GB1927～1943-91。研究结果显示,经浸注处理后的试样均达到美国AWPA标准UC4A等级规定的药剂保持量;ACQ防腐处理大约降低了20%扭叶松蓝变木材的冲击韧性,与未防腐处理试样对比,在0.01水平上有显著差异,但不同浓度间差异不显著;三种浓度ACQ处理间以及与未处理的扭叶松蓝变木材的抗弯强度、抗弯弹性模量和顺纹剪切强度差异不显著;随着ACQ浓度的降低,冲击韧性、抗弯强度、抗弯弹性模量和顺纹弦面剪切强度有所增大,但影响都很小。图4表10参6。
In this paper, three different concentrations of ACQ preservatives were used in the treatment of Betula platyphylla, and their concentrations were 1.2%, 2.0% and 2.8% respectively. The flexural modulus, flexural strength, impact toughness and shear strength (chordal surface) of untreated blue-colored wood were studied. The testing standards refer to GB1927 ~ 1943-91. The results showed that the samples after immersion treatment reached the level of the American AWPA standard UC4A prescription preservatives; ACQ preservative treatment reduces the impact toughness of the wood of about 20% , But there was significant difference at 0.01 level but no significant difference between different concentrations. The difference of flexural strength, flexural modulus and reciprocal shear strength between three ACQ treatments and untreated Timber blue wood The impact toughness, flexural strength, flexural modulus of elasticity and the shear strength along the chordal surface increased with the decrease of ACQ concentration, but the influence was insignificant. Figure 4 Table 10 参 6.