摘要
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.
出处
《新型建筑材料》
北大核心
2010年第7期4-6,共3页
New Building Materials
基金
国家重点基础研究发展规划(973)资助项目(2009CB623205)
关键词
微晶纤维素
混凝土韧性
断裂能
microcrystalline cellulose
concrete toughness:fracture energy