一、锯末天然有机物如锯末和稻壳已多次被用来生产混凝土。锯末在多数情况下使用效果良好,但当含有一定杂质时,就会减缓水泥的水化与硬化作用。目前已研制出对锯末进行物理—化学处理即可消除其有害杂质的方法,但要明显地增加造价。有害物质的影响程度随木材种类而变化,硬质木材如芒果树、柳安的锯末杂质则会严重抑制水泥水化,而别的一些树种影响程度相对要小一些。但要得到一种木材的纯锯末几乎是不可能的,因 First, the sawdust natural organic matter such as sawdust and rice husk has been used to produce concrete. Sawdust works well in most cases, but when it contains certain impurities it slows the hydration and hardening of the cement. At present, methods have been developed for the physical-chemical treatment of sawdust to eliminate its harmful impurities, but obviously increase the cost. The degree of harmful substances changes with the type of wood, hard wood such as mango, Liuan sawdust impurities will seriously inhibit the hydration of cement, and some other species of influence is relatively smaller. But it is almost impossible to get a pure sawdust of wood