In this paper, the bulk density, microstructure, porosity and pore size distribution of the selected aggregates, including hemp shiv, flax shiv, rape shiv and wheat straw, are fully studied due to these properties are highly related to their excellent characteristics and more or less linked to the properties of the final product. The scanning electron microscope results showed all the selected aggregates have a highly porous and complex hierarchical structure, whereas the arrangement of pores and the thickness of cell wall are significantly different among these aggregates. All the selected aggregates had a low bulk density ranging from 30 to 130 kg · m⁻³ and a high porosity between 75.81% and 88.74%. The thermal conductivity of the selected bio-aggregates ranged from 0.04 to 0.06 W·m⁻¹·K⁻¹. The thermal conductivity of the selected aggregates was not only depending on the bulk density of the sample but also depending on the raw material. Hemp shiv, rape shiv and flax shiv were excellent hygric regulators with moisture buffer value (MBV) ranging from 2.07 to 2.36 g·m⁻²·%RH⁻¹, whereas, wheat straw had a lower MBV value ranging from 1.76 to 1.97 g·m⁻²·%RH⁻¹. The results showed that particle size does not affect the MBV value. The MBV value increases linearly with bulk density.

在本文中，由于这些特性与其优良的特性高度相关，因此对所选骨料（包括麻纤维，亚麻纤维，油菜纤维和小麦秸秆）的堆积密度，微观结构，孔隙率和孔径分布进行了充分的研究，或者更多与最终产品的属性联系较少。扫描电子显微镜的结果表明，所有选择的聚集体都具有高度多孔和复杂的分层结构，而这些聚集体中孔的排列和细胞壁的厚度却存在显着差异。所有选定的骨料均具有30至130 kg·m ^-3的低堆积密度和75.81％至88.74％的高孔隙率。所选生物聚集体的热导率范围为0.04至0.06 W·m ^-1·K ^-1。所选聚集体的热导率不仅取决于样品的堆积密度，还取决于原材料。大麻糠，油菜糠和亚麻糠是优良的保湿调节剂，水分缓冲值（MBV）为2.07至2.36 g·m ^-2 ·％RH ^-1，而小麦秸秆的MBV值较低，为1.76至1.97 g ·m ^-2 ·％RH ^-1。结果表明粒径不影响MBV值。的MBV值与堆积密度呈线性增加。