Steel fiber reinforced concrete

Steel fiber reinforced concrete is mixed in ordinary concrete to the distribution of the short steel fiber formed by a new type of multiphase composite materials. These disorderly to the distribution of steel fiber can effectively prevent the expansion of the internal micro cracks of concrete and the formation of macroscopic fracture, significantly improve the concrete tensile, bending, impact and fatigue resistance, good ductility. Steel fiber reinforced concrete admixture is internationally recognized as can be used in highway construction, Including urban roads and highways) , bridge, tunnel, subway, mine tunnel, industrial floor, water conservancy construction, military facilities, anti-cracking, waterproof civil building universal steel fibers. Ha, steel fiber production using high quality raw material containing manganese alloy high strength steel casting, due to the special shape and it has the advanced production technology, ingot milling steel fiber than ordinary steel fiber concrete in the bond strength increases 3 a 5 times, make its significantly higher on the enhancement effect of concrete, compressive strength, flexural strength, wear resistance increase 20 - generally 50%, the anti-cracking performance of concrete improve 3 - 4 times, and increase flexural fatigue strength. 65 - 2. 25 times, resistance to 5 a 10 times higher impact strength, toughness increase - 40 200 times. Ha, ingot milling steel fiber is suitable for various construction conditions, the concrete mixed with no special requirements, uniform distribution in the concrete, never cluster, bring convenience to modern construction. Steel fiber concrete mixture ratio of new hybrid steel fiber reinforced self-compacting concrete mixture ratio design method of research. Flowability in net as an index, net slurry mixture selected to meet the requirements in the first place. Then according to the average of steel fiber and sand particles in pulp fiber thickness and sand ratio, optimizing the proportion of mechanical properties and performance meet the requirements. Adopting the mixture ratio design method can make up out of the slump is greater than 260 mm, the extension is greater than 550 mm, total fiber dosage is 1. 5% of self-compacting reinforced concrete. After standard curing 28 days, the compressive strength of up to 114. 5 mpa, bending strength can reach 18. 8MPa。