Ultra high performance concrete (UHPC) differs from ordinary concrete by its composition and its characteristics. It exhibits a considerably higher powder content with usually a smaller maximum grain diameter, very low water/cement or water/binder ratios and a considerably higher superplasticiser content. UHPC can achieve compressive strengths of over 200 N/mm² and flexural strengths of over 20 N/mm². Due to its dense microstructure it is virtually impermeable to water, chemically aggressive substances and chlorides.
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