含粗骨料的超高性能混凝土抗压强度值的影响因素研究

In this paper, Ultra-high performance concrete (UHPC) incorporating coarse aggregate was prepared with common raw materials. An experimantal investigation was conducted on the influencing factors on compressive strength of ultra-high performance concrete, including water to binder ratio (W/B), particle size range of coarse aggregate, fine modulus of sand, dosage of binder materials, types and dosage of mineral admixtures, steel fiber. The results indicated that, all the factors tested affected compressive strength of concrete, especially the W/B and mineral admixtures. With the lower W/B, incorporating mineral admixtures and using high-performance superplasticizer, UHPC incorporating coarse aggregate can be prepared successfully with the compressive strength about 150MPa. Further research results on the mechanical properties of UHPC will be reported recently.