In search for greener building materials, geopolymer wood composites (GWC) were produced through alkali activation of fly ash, using pine and eucalypt wood particles. The study examined the influence of grinding fly ash, wood species and hot water treatment of wood particles on the physical properties and specific compressive strength of GWC before and after 200 cycles of soaking and drying. Ash-grinding affected particle size distribution, as the hot water pretreatment of the wood affected its extractives. The particle size analysis showed that grinding decreased the mean particle size of raw ash by 55% and played a major role in the composite’s properties, as lower densities and specific strength with high water absorption were recorded for GWC from raw ash than from ground ash. The ash-grinding step doubled the specific strength of the composites before the aging test. A decrease in specific strength (15–32%) was observed for all composites after the soaking and drying cycles. Hot water washing of the wood resulted in a 47% and 67% reduction in the extractive content of the pine and eucalypt particles, respectively. An improvement of 27% and 3% was noted in specific strength values respectively for GWC with treated pine and eucalypt particles. In general, lower specific strength was recorded for pine-based composites than eucalypt ones, due to the fast impregnation and high water absorption from the mixture by pine particles. It was revealed that hot water treatment of wood improves GWC properties less compared to wood species or fly ash particle size.

为了寻找更绿色的建筑材料，使用松木和桉木颗粒通过粉煤灰的碱活化生产了地聚合物木复合材料（GWC）。该研究考察了粉煤灰，木材种类和木材颗粒的热水处理对200周期的浸泡和干燥前后GWC的物理性能和比抗压强度的影响。由于木材的热水预处理影响了木材的提取物，因此打磨灰会影响粒度分布。粒度分析表明，磨碎将原灰的平均粒度降低了55％，并在复合材料的性能中发挥了重要作用，因为与灰烬相比，原灰记录到的GWC的密度和比强度较低，并且具有高吸水率。在老化试验之前，灰烬研磨步骤使复合材料的比强度增加了一倍。浸泡和干燥周期后，所有复合材料的比强度均降低（15-32％）。木材的热水洗涤分别使松树和桉树颗粒的提取物含量降低了47％和67％。经处理的松木和桉木颗粒的GWC的比强度值分别提高了27％和3％。通常，由于松木颗粒的浸渍速度快且从混合物中吸水率高，因此松木基复合材料的比强度要低于桉木基复合材料。据揭示，与木材种类或粉煤灰颗粒尺寸相比，木材的热水处理对GWC性能的改善作用较小。浸泡和干燥周期后，所有复合材料的比强度均降低（15-32％）。木材的热水洗涤分别使松树和桉树颗粒的提取物含量降低了47％和67％。经处理的松木和桉木颗粒的GWC的比强度值分别提高了27％和3％。通常，由于松木颗粒的浸渍速度快且从混合物中吸水率高，因此松木基复合材料的比强度要低于桉木基复合材料。据揭示，与木材种类或粉煤灰颗粒尺寸相比，木材的热水处理对GWC性能的改善作用较小。浸泡和干燥周期后，所有复合材料的比强度均降低（15-32％）。木材的热水洗涤分别使松树和桉树颗粒的提取物含量降低了47％和67％。经处理的松木和桉木颗粒的GWC的比强度值分别提高了27％和3％。通常，由于松木颗粒的浸渍速度快且从混合物中吸水率高，因此松木基复合材料的比强度要低于桉木基复合材料。据揭示，与木材种类或粉煤灰颗粒尺寸相比，木材的热水处理对GWC性能的改善作用较小。木材的热水洗涤分别使松树和桉树颗粒的提取物含量降低了47％和67％。经处理的松木和桉木颗粒的GWC的比强度值分别提高了27％和3％。通常，由于松木颗粒的浸渍速度快且从混合物中吸水率高，因此松木基复合材料的比强度要低于桉木基复合材料。据揭示，与木材种类或粉煤灰颗粒尺寸相比，木材的热水处理对GWC性能的改善作用较小。木材的热水洗涤分别使松树和桉树颗粒的提取物含量降低了47％和67％。经处理的松木和桉木颗粒的GWC的比强度值分别提高了27％和3％。通常，由于松木颗粒的浸渍速度快且从混合物中吸水率高，因此松木基复合材料的比强度要低于桉木基复合材料。据揭示，与木材种类或粉煤灰颗粒尺寸相比，木材的热水处理对GWC性能的改善作用较小。由于松散颗粒可从混合物中快速浸渍和高吸水率。据揭示，与木材种类或粉煤灰颗粒尺寸相比，木材的热水处理对GWC性能的改善作用较小。由于松散颗粒可从混合物中快速浸渍和高吸水率。据揭示，与木材种类或粉煤灰颗粒尺寸相比，木材的热水处理对GWC性能的改善作用较小。