Ultra-High Performance Concrete (UHPC)

Ultra-High Performance Cementitious Composites (UHPC) is a new high-end engineering material designed based on the closest packing theory. Through multi-level particle gradation and ultra-fine powder filling, it forms a dense matrix with extremely low porosity. Combined with an ultra-low water-binder ratio and high-efficiency water reducer, it achieves mechanical and durability properties far exceeding those of ordinary concrete.

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UHPC Characteristics

1 : High Compressive Strength: The compressive strength of ordinary concrete is 30 to 50 MPa. The compressive strength of UHPC is 120 to 240 MPa.
2 : High Tensile Strength: The tensile strength of traditional concrete ranges from 2.5 to 5 MPa, whereas that of UHPC is approximately 10 MPa.
3 : Durability:Concrete prisms were immersed in a water bath to test their resistance to freeze-thaw cycles; after 600 freeze-thaw cycles, the UHPC retained 100% of its material properties.
4 : Chloride Permeability: When tested, UHPC exhibits an extremely low chloride migration rate—less than 10% of that of ordinary concrete.
5 : Abrasion Resistance: UHPC possesses excellent abrasion resistance, which is nearly double that of ordinary concrete.

Product Parameters

Item/Parameter (Standard)	Testing Basis	UHPC Bridge Deck Paving	UHPC Pier Column Connection	UHPC precast beam-slab wet connection
compressive strength,MPa	GB/T31387	≥120	≥130	≥120
Elastic limit tensile strength,MPa	T/CBMF 37-2018	≥7	≥8	≥7
Ultimate tensile strength,MPa	T/CBMF 37-2018	>7.7	≥39	≥8
Ultimate tensile strain,%	T/CBMF 37-2018	≥0.2	≥0.2	≥0.2
Chloride ion diffusion coefficient,X10-14m2/s	T/CBMF 37-2018	<20	<20	<20
elastic modulus,GPa	GB/T 31387	45-55	45-55	45-55
Water absorption rate,%	GB 50212-2014	≤4.0	≤4.0	≤4.0
28-day systolic rate,10-6	GB/T50082	<300	<250	<250
Initial collapse expansion,mm	GB/T50080	≥550	≥700	≥700
1-hour collapse expansion, mm	GB/T50080	≥500	≥500	≥500

Application

New Prefabricated and Assembled Bridges, UHPC Grouting for Wind Power Structures, UHPC Wet Joints, UHPC Abrasion-Resistant Materials, UHPC Rapid Repair and Reinforcement.