微晶纤维素增韧混凝土的性能研究及机理分析

Properties study and mechanism analysis of concrete reinforced by microcrystalline cellulose

采用化学改性的方法制备了微纳米级微晶纤维素,混凝土性能测试表明,微纳米级微晶纤维素具有良好的工作性能、能提高混凝土的抗压和抗折强度,使混凝土断裂能提高50%,有效地增强混凝土韧性。用SEM分析了混凝土水化产物的微观形貌,发现微纳米级微晶纤维素在混凝土中的均匀分散、填充、桥联作用是改善混凝土韧性的原因。

Nanocrystalline and submicrocrystalline cellulose were prepared by chemical modification method. The performance test results show that such cellulose has good operating perfnrmance, can improve compressive strength and flexural strength of the concrete,increase concrete fracture energy by 50%,and efficiently enhance the concrete toughness. According to SEM analysis,well- distributing,filling and bridging function of microcrystalline cellulose in concrete was the main reason improving the toughness of concrete.