纤维高性能混凝土工作性能与韧性的试验研究

目的 揭示高耐碱玻璃纤维[ARGF（H）]与混杂纤维对高性能混凝土工作性能与弯曲韧性的影响，以拓展它们的结构用途．方法 参照国际上先进的试验方法和标准，按不同的纤维掺量设计了多组玻璃纤维、钢纤维（SF）以及混杂纤维混凝土试件，进行了大量工作性能、含气量、抗压强度和弯曲韧性的试验．结果 掺加纤维对高性能混凝土的工作性能、抗压强度无明显影响。钢纤维和混杂纤维均可明显提高混凝土的韧性．结论 玻璃纤维对混凝土的韧性有一定的提高，与钢纤维混杂可充分发挥SF提高韧性及ARGF（H）抵抗收缩裂缝的功效，在实际工程中具有性能与成本的优势。

Experimental Study on Fiber Reinforced High Performance Concrete

The influence of high alkali-resistant glass fiber[ARGF(H)]on the performance of high performance concrete has been analyzed.An experiment has been carried out to design multi-kinds of glass fiber concrete,steel fiber concrete and hybrid fiber concrete with a different fiber admixture,and to test the workability,air content,compressive strength and flexural toughness according to relevant guidelines.The flexural toughness has been analyzed according to RILEM guidelines.Moreover,the toughness of beams with steel or glass fiber reinforcement and with hybrid fiber reinforcement has been compared.The experiment also shows that glass fiber has no obvious influence on working performance and compression-resistant strength of concrete with high reinforcement.However,it can slightly improve toughness of this kind of concrete;if mixed with steel fiber,it can fully give play to SF to raise toughness and advantages of ARGF(H) in resisting the shrinkage crack.Therefore,it has the advantage of increasing performance and reducing cost in practical engineering.