Abstract
Ultra high performance concrete (UHPC), one of the newest cementitious composites, demonstrates superior ductility with high strength and durability, which has gained the attention of researchers and engineers since it was successfully developed. Considering its superior ductility and durability, UHPC is a good alternative material for forming a advanced composite structure with normal reinforced concrete (RC) or prestressed concrete. The material properties are critical for its application in composite structures, so in this chapter, material properties of UHPC, such as constitute raw materials, mechanical properties, durability and several constitutive relations from several standards are firstly introduced. The basic concepts of advanced UHPC-RC composite structures, such as UHPC-RC composite beam, composite column, composite wall, etc, are introduced finally.
Highlights
Ultra high performance concrete (UHPC) can be developed based on the improvement of high strength cementitious material or high performance cementitious material by the use of particle packing model
Approximately 30 % increase in compressive strength was observed with the addition of 2.5 % by mixture volume of steel fibers when specimens were subjected to thermal treatment [15]
No freeze–thaw degradation was observed for UHPC specimens after 800 of freezing-thawing cycles, which was attributed to less interconnected pores [29]
Summary
UHPC can be developed based on the improvement of high strength cementitious material or high performance cementitious material by the use of particle packing model. Developing of optimum packing density and discovery of suitable superplasticizer and micro filler like silica fume helpes the cementitious composites gain high strength and good workability with low water-cement ratio[1]
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