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What is meant by residual strength?

What is meant by residual strength?
Update Time:2018-01-23
The residual flexural strength is equal to the post crack flexural strength of steel fiber concrete corresponding to a certain deflection in a beam bending test. it is a value from testing which has been introduced for the design of steel fiber concrete.
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Dalian Harvest Metal Fibers Co., Ltd. is a Sino-France joint venture company , a specialty in producing thermal resistant steel fibers, and steel fibers for concrete reinforcement. HARVEST steel fibers have been well adopted by a wide range of professionals, such as Metallurgy, Cement, Petrol refinery, Chemistry, Ceramics, and so on. Steel fibers have been well used in concrete construction projects, such as  bridges, tannels, high ways, airport,  power stations, industrial floors. More than 90% of HARVEST steel fibers have been used by our customers in Asia, Europe, North and South America,  Australia, etc… . HARVEST has been winning the users high praise because of high quality products and good services.