【摘要】 以定向刨花板厂的大片杨木刨花经简易粉碎设备粉碎分选得到的刨花和42.5强度等级的普通硅酸盐水泥为原料,Na2SiO3为添加剂,通过热压制板的方法,研究了热压温度和养护时间对快速固化水泥刨花板性能的影响。结果表明:①在85~95℃范围内,热压温度对厚板(20 mm)的物理力学性能无显著影响,而对薄板(12 mm)的弹性模量和吸水厚度膨胀率影响显著。②水泥刨花板卸出压机后的自然养护时间对快速固化水泥刨花板物理力学性能的影响主要取决于板在养护期间水泥的水化情况。厚板卸出压机后的含水率高,养护期间水泥水化好,养护时间对性能的影响显著;薄板卸出压机后含水率低,养护期间水泥水化不如厚板好,养护时间对性能无显著影响。表7参10更多还原

【Abstract】 The effects of hot pressing temperature and natural curing time on the properties of the fast-curing cement particle board（CPB） were studied with particles broken from poplar strands of OSB（oriented structural board）factories and 42.5 level silicate as experimental materials and Na₂SiO₃ as additive.The results were as follows:（1）Hot pressing temperature had no obvious effects on the properties of thick CPB（20 mm）,but had obvious effects on modulus of elasticity（MOE）and thickness swelling rate of thin CPB（12 mm） when the hot-pressing temperature was from 85 ℃ to 95 ℃.（2） The natural curing time of CPB after hot pressing on the physical and mechanical properties of fast-curing CPB were determined by the hydration of cement.The natural curing time of thick CPB had obvious effects on the properties because the cement well hydrated with high moisture content of thick CPB.The natural curing time of thin CPB had no obvious effects on the properties because the cements didn’t well hydrated with low moisture content of thin CPB.更多还原