CAJ | 학술논문

以福建土楼和贵楼修缮时更换下来的10根不同类型的旧木质构件为材料，鉴定树种后，根据国家标准划分的5个木材腐朽等级，制取96个标准试件，对无腐朽旧木材及不同腐朽等级的旧木材试件进行材性实验，得到了旧木材各项物理力学性质的不同变化。结果表明：这10根旧木质构件都属于杉木。与新鲜木材相比，使用282年后，无腐朽旧杉木密度无明显变化，横纹抗压强度、顺纹抗压强度、抗弯强度、抗弯弹性模量均明显降低。不同腐朽等级的旧杉木，随着腐朽程度的加剧，密度逐步降低，力学强度迅速衰减，特别是达到“三级”腐朽时，密度降低了约28％，横纹抗压强度降低了约60％，顺纹抗压强度降低了约55％，抗弯强度降低了约78％。
이복건토루화귀루수선시경환하래적10근불동류형적구목질구건위재료，감정수충후，근거국가표준화분적5개목재부후등급，제취96개표준시건，대무부후구목재급불동부후등급적구목재시건진행재성실험，득도료구목재각항물리역학성질적불동변화。결과표명：저10근구목질구건도속우삼목。여신선목재상비，사용282년후，무부후구삼목밀도무명현변화，횡문항압강도、순문항압강도、항만강도、항만탄성모량균명현강저。불동부후등급적구삼목，수착부후정도적가극，밀도축보강저，역학강도신속쇠감，특별시체도“삼급”부후시，밀도강저료약28％，횡문항압강도강저료약60％，순문항압강도강저료약55％，항만강도강저료약78％。
This article demonstrates the wood property experimentations of 96 standard wood samples made after tree species identification of 10 different types of ancient woody components removed from Hegui Earth Building in Fujian Province when it was renovated. During the experimentation, different changes of physical and mechanical properties of the samples which were classified into 5 decay grades according to national standard were presented. The results shows that among the 10 ancient woody components which were identified as Chinese fir, when compared with the fresh wood, the density of the non-decayed Chinese-fir has no significant change after 282 years of use, while there is obvious decrease in compression strength perpendicular and parallel to grain, flexural strength and bend elastic modulus. The density gradually decreases and mechanical strength rapidly attenuates as the decay grade becomes higher, especially when the decay grade reaches“three”, the density decreases by 28%, compression strength perpendicular to grain by 60%, compression strength parallel to grain by 55% and flexural strength by 78%.