38种木材对水泥水化的抑制作用

本文研究了38种木材对普通硅酸盐水泥放热反应的影响。将所测试的全部树种分为两类。第Ⅰ类24个树种,对水泥水化反应的作用比较缓和,在24小时内可出现反应温度峰值。其余14个树种完全抑制水泥的水化过程。根据最高水化温度和到达这一温度所需要的时间,评估了第Ⅰ类的每种木材作为生产水泥刨花板原料的适应性。

INHIBITING EFFECT OF 38 WOOD PECIES ON CEMENT HYDRATION

An equipment and procedure are introduced for measuring the hydration temperature of wood-cement-water mixture. The effect of 38 wood species on the exothermic reaction of ordinary Portland cement was studied by this procedure. All the species tested are divided into two groups. 24 species includied in the first proup show a rather moderating influence on the hydration reaction of cement, and a peak of reaction temperature appears within 24 gours for each species. However, the other 14 species inhibi cement hydration completely. According to the maximum temperature o hydration and the time required to reach this temperature, the suitability of each species in the first group is estimatod when used as raw material for production of cement particleboard.