THE INFLUENCE OF CEMENT/WOOD RATIO AND CEMENT TYPE ON BENDING STRENGTH AND DIMENSIONAL STABILITY OF WOOD-CEMENT COMPOSITE PANELS'
THE INFLUENCE OF CEMENT/WOOD RATIO AND CEMENT TYPE ON BENDING STRENGTH AND DIMENSIONAL STABILITY OF WOOD-CEMENT COMPOSITE PANELS'
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灰木比和水泥种类对木水泥复合板抗弯强度和尺寸稳定性的影响
DOI：
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发表时间：
1987
影响因子：
1.4
通讯作者：
Stephen Pfister
中科院分区：
文献类型：
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作者：
A. Moslemi;Stephen Pfister
本研究考察了水泥/木材比从3.0降低到1.5，每0.5个增量对水泥胶结复合板的弯曲和尺寸稳定性的影响。此外，采用两种类型的波特兰水泥（I和III）来评估两种类型之间的性能是否存在差异。治疗期从28天减少到14天，以调查这些特性是否显著降低。结果表明：随着水泥/木材比例的降低，破裂模量增大；发现水泥/木材比为2.0时具有最佳的抗弯强度。然而，弹性模量随着水泥/木材比的增大而线性增加。一般来说，本研究中制成的木水泥板在暴露于24小时的水中浸泡时表现出高度的尺寸稳定性。在本研究中使用的利哈伊水泥类型之间没有观察到明显的差异，这被认为是由于化合物成分的相似性。在大多数情况下，将固化时间从28天减少到14天对板的性能影响不大。
This study examined the influence of decreasing cement/wood ratios from 3.0 to 1.5 at 0.5 increments on flexural and dimensional stability properties of cement-bonded composite panels. In addition, two types of Portland cement (I and III) were employed to assess if a difference exists in properties over time between the two types. Cure periods were reduced from 28 to 14 days to investigate whether significant reductions occur in these properties. Results indicate that modulus of rupture increases as the cement/wood proportion is lowered. A cement/wood ratio of 2.0 was found to demonstrate optimum bending strength. Modulus of elasticity, however, increased linearly with greater cement/wood ratios. Generally, wood-cement panels made in this study exhibited high dimensional stability when exposed to a 24-hour water soak. No significant differences were observed between the Lehigh cement types used in this study believed to be due to compound composition similarities. In most cases, reducing cure periods from 28 to 14 days had little influence on board properties.