Geopolymer was used as a multifunctional mineral binder to produce laminated veneer lumber (LVL). The main aim of the study was to characterize the various geopolymer binder formulations based on natural kaolin, metakaolin and silica fume. The effect of different combinations of aluminosilicate powder in geopolymer binder was characterized via FTIR, XRD and TGA analysis. The mechanical (shear, bending, and compression) and physical (thickness swelling and water absorption) properties of the LVL specimens were also evaluated. Results showed that characteristic bands attributed to the geopolymer binder were more pronounced with further replacement of kaolin with metakaolin and silica fume. The higher the metakaolin content, the greater the amorphous content of the reaction products. The mechanical properties of the LVL samples strongly depended on the unreacted components (Si and Al molecules) existing in the aluminosilicate powder as well as the Si/Al ratio in geopolymer binders. The content of unreacted components was reduced by decreasing of the kaolin content in the binder formulations. Furthermore, increasing of Si/Al ratio, via addition of silica fume, showed positive influence on kaolin-based binders, while it showed a slightly negative influence on metakaolin-based binders. Although metakaolin is more favored for geopolymer synthesis due to its better mechanical, chemical, thermal and durability properties, the combination of kaolin with metakaolin could enhance its characteristics to be used as an aluminosilicate source for geopolymer binder. Kaolin-based binders showed higher tendency to penetrate into the wood cell lumens compared to metakaolin-based binders.

地质聚合物被用作多功能矿物粘合剂，以生产层压单板木材（LVL）。该研究的主要目的是表征基于天然高岭土，偏高岭土和硅粉的各种地质​​聚合物粘合剂配方。通过FTIR，XRD和TGA分析表征了铝硅酸盐粉末在地质聚合物粘结剂中不同组合的影响。还评估了LVL样品的机械（剪切，弯曲和压缩）和物理（厚度膨胀和吸水）性能。结果表明，随着用偏高岭土和硅粉进一步替代高岭土，归因于地聚合物粘合剂的特征谱带更加明显。偏高岭土含量越高，反应产物的无定形含量越大。LVL样品的机械性能很大程度上取决于硅铝酸盐粉末中存在的未反应组分（Si和Al分子）以及地质聚合物粘合剂中的Si / Al比。通过减少粘合剂配方中高岭土的含量来降低未反应组分的含量。此外，通过添加硅粉增加Si / Al比对高岭土基粘合剂表现出积极影响，而对偏高岭土基粘合剂表现出轻微的负面影响。尽管偏高岭土因其更好的机械，化学，热和耐久性能而更受地聚合物合成的欢迎，但高岭土与偏高岭土的组合可增强其特性，可用作地聚合物的硅铝酸盐来源。