稻壳预处理工艺对稻壳砂浆性能的影响

Effect of Rice Husk Pretreatment Process on Properties of Rice Husk Mortar

利用稻壳与水泥复合制备稻壳砂浆,并就稻壳经自来水和饱和石灰水浸泡两种预处理工艺对稻壳砂浆性能的影响进行了试验研究.结果表明:与未采取任何预处理措施的稻壳相比,经过两种预处理工艺处理的稻壳所制备的砂浆其力学性能明显提高,且饱和石灰水浸泡法预处理的效果优于自来水浸泡法;饱和石灰水浸泡法预处理后的稻壳制备的稻壳砂浆其水化热峰值最高,3d放热量最大.利用红外光谱分析了预处理前后稻壳表面官能团的变化,发现预处理后稻壳表面半纤维素吸收峰减弱,脂肪族吸收峰消失.

In this paper,rice husk mortar made from rice husk and cement was prepared and the effect of two pretreatment processes,including water soaking and saturated lime water soaking,on the properties of rice husk mortar were studied.The results indicate that the mechanical properties of rice husk mortar made from pretreated rice husk were significantly higher than that made from untreated rice husk.The saturated lime water soaking pretreatment method is better than the water soaking method.The hydration heat peak and heat release in 3 days of rice husk mortar made from saturated lime water soaking is the highest.This paper also analyzes the change of surface functional groups of rice husk by infrared spectrum. The results show that after pretreatment the hemicellulose absorption peak reduces and the aliphatic absorption peak disappears on rice husk surface.