当前位置: X-MOL 学术J. Wood Chem. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Treatments of residual pine strands: characterization and wood-cement-compatibility
Journal of Wood Chemistry and Technology ( IF 2 ) Pub Date : 2020-10-12 , DOI: 10.1080/02773813.2020.1828474
Matheus R. Cabral 1, 2 , Erika Y. Nakanishi 1 , Mayara S. R. Franco 1 , Sérgio F. Santos 3 , Juliano Fiorelli 1
Affiliation  

Abstract This paper aims to evaluate treatments on pine strands as well as wood-cement compatibility. The strands were prepared and then were submitted to four treatments (untreated; cold water, hot water and NaOH). Physical, chemical, thermal and mechanical properties of the strands were measured. Wood-cement composites were produced with all strand treatments. To evaluate the strand effects on the cement hydration, axial compression tests were conducted at 28-day. The phases of the matrix of the composites at 24 h 7- and 28-day were also determinate. Fourier transform infrared spectra shows that, although the treatments partially removed the hemicellulose and extractives, they also reduced the cellulose and lignin bands. Axial compression results indicated that there were no differences between values for the composites with untreated and treated strands. For the phase analyses, in the initial ages (24 h and 7-day), it was identified that portlandite for cement sample (control) is higher than those containing the strands. At 28-day, it was found that among the strands, the untreated have the lower portlandite content and the higher calcium carbonate content. Indicating the cement carbonation over time as presented in the cement sample (control). Therefore, the untreated pine residual strand showed good compatibility with cement and for this study there were no benefits on treating the strands.

中文翻译:

残留松木条的处理:表征和木-水泥相容性

摘要 本文旨在评估对松木条的处理以及木-水泥相容性。制备线束,然后进行四次处理(未处理;冷水、热水和NaOH)。测量了股线的物理、化学、热和机械性能。木-水泥复合材料是通过所有线束处理生产的。为了评估绞线对水泥水化的影响,在第 28 天进行了轴压试验。复合材料基质在 24 小时 7 天和 28 天时的相也是确定的。傅里叶变换红外光谱表明,虽然处理部分去除了半纤维素和提取物,但它们也减少了纤维素和木质素带。轴向压缩结果表明,具有未处理和处理过的股线的复合材料的值之间没有差异。对于相分析,在初始年龄(24 小时和 7 天)中,确定用于水泥样品(对照)的硅酸盐高于含有绞线的硅酸盐。在第 28 天时,发现线束中未处理的硅酸盐含量较低,碳酸钙含量较高。指示水泥样品(对照)中随时间推移的水泥碳化。因此,未经处理的松木残留线材与水泥具有良好的相容性,对于本研究而言,处理线材没有任何好处。经鉴定,水泥样品(对照)中的硅酸盐比含有绞线的那些高。在第 28 天时,发现线束中未处理的硅酸盐含量较低,碳酸钙含量较高。指示水泥样品(对照)中随时间推移的水泥碳化。因此,未经处理的松木残留线材与水泥具有良好的相容性,对于本研究而言,处理线材没有任何好处。经鉴定,水泥样品(对照)中的硅酸盐比含有绞线的那些高。在第 28 天时,发现线束中未处理的硅酸盐含量较低,碳酸钙含量较高。指示水泥样品(对照)中随时间推移的水泥碳化。因此,未经处理的松木残留线材与水泥具有良好的相容性,对于本研究而言,处理线材没有任何好处。
更新日期:2020-10-12
down
wechat
bug