The depth resolution secondary epoxy grout construction is the minimum thickness

Generally the thickness with the requirements of the construction, most used in strengthening concrete structure enlarging section! With the development of construction industry, reinforcement engineering more and more. The reinforcement of specification for the upper structure load increases with the strengthening methods of pillars reinforcement method of enlarging the section, seismic reinforcement method, sticking steel strengthening method, including enlarging column section method known as outsourcing column construction, bearing capacity of the method is convenient for construction and improve the effect is obvious. Reinforcement method of enlarging the section of the biggest problems is to make the whole part of old and new concrete work, common mechanical problems, and the combination of new and old concrete surface is the weak link to reinforce the structure. Therefore, from the design on the structure configuration enough through combining the shear friction reinforcement or anchorage connects two parts, is to ensure that the joint surface force effectively, and the key to make the two parts of the old and new concrete whole work. Secondary epoxy grout surface minimum thickness of reinforced protective layer thickness should be not less than 10 mm, outside steel mesh reinforcement diameter appropriate for 4 ~ 8, the appropriate grid for grid cloth reinforcement, distance should not be less than 150 mm, cement mortar strength grade appropriate for M7. 5 ~ M10, steel mesh (with 4 ~ 6 wall S muscles Double-sided reinforcement) Or with 4 u muscles ( The single side reinforcement) And the wall fixed. Before the surface rendering should be clean, carved brick joints, to paint or ceramic tile and smooth surface. But avoid by all means will play MAO brick surface, lest make cake and loose wall surface wetting with water before metope, surface sprinkling water should be after maintenance, prevent weather-shack or release with the original metope. Concrete wall secondary epoxy grout the minimum thickness of plasma components should not be below the C13 concrete strength; B, new part, can use cast-in-situ concrete, self-compacting concrete or sprayed concrete pouring. Also can be used mixed with fine stone concrete cement base high-strength non-shrinkage epoxy grout perfusion. C, the new concrete thickness requirements: artificial casting: 60 mm or higher; Jet: 50 mm or higher. D, the enlarged cross section method is adopted, the original component of concrete surface should be treated, design documents to improve the quality of processing methods of cross section and the request. In general, in addition to the concrete surface should be to play MAO, it should be taken to besmear brushs interface adhesive structure, cropping shear pin or increasing the number of shear key measures. E, the stress of the column rebar diameter should not less than 14 mm, plus anchor diameter of stirrup should not be less than 8 mm; U shape collar diameter should be same as the original diameter of stirrup; The distribution of diameter should not less than 6 mm.