高性能聚甲醛纤维增强装饰用UHPC的性能及应用

Performance and application of high performance POM fiber reinforced UHPC for decoration

建筑外墙装饰板向轻薄化、高耐久、高美观度及造型复杂化方向发展,而合成纤维增强超高性能混凝土装饰板则可以满足上述要求。表征了聚甲醛纤维的力学性能、微观形貌,并评估了其对UHPC流动度、力学性能、韧性及耐火性能的影响规律,结果表明:直径0.2 mm左右、长度6~12 mm区间的性能优异的POM纤维,在掺量为20 kg/t的情况下,可实现流动性与力学强度的平衡,且显示出良好的增韧效果与耐火特性,已经实施的工程项目展示出较好的应用前景。

The exterior wall decorative board is developing in the direction of lightweight,high durability,high aesthetics and complex modeling,while the synthetic fiber reinforced ultra-high performance concrete decorative board can meet the above requirements.The mechanical properties and micro morphology of POM fiber were characterized,and the effects of POM fiber on the fluidity,mechanical properties,toughness and fire resistance of UHPC were evaluated.The results show that POM fiber with excellent performance with a diameter of about 0.2 mm and a length of 6~12 mm can achieve the balance between fluidity and mechanical strength when the dosage is 20 kg/t,and show good toughening effect and fire resistance.The implemented projects show good application prospects.