Ultra-high performance concrete-UHPC
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Ultra-high performance CONSTRUCTION PROCESS concrete-UHPC 8. The concrete surface contacted by cement-based grouting materials shall be fully roughened. Before a special engineering cement-based grout with ultra-high grouting, the equipment base plate and concrete foundation surface in contact with grouting materials shall strength, toughness and high durability be cleaned without loose gravel, laitance, floating ash, oil stain, wax, etc. The foundation concrete surface shall be fully wetted 24 hours before grouting, and the ponding shall be removed 1 hour before grouting. 9. During secondary grouting, grouting shall be carried out from one side until it overflows from the other side. Grouting shall not be carried out from the opposite sides at the same time. After grouting, it must be carried out continuously and the grouting time must be shortened as much as possible. 10. After the grouting material reaches the design strength, the surface shall be coated with ordinary Ultra-high performance concrete (hereinafter refer to UHPC) is a special engineering material with ultra- epoxy coal tar pitch, and the dry film thickness shall not be less than 300um. It shall be implemented in high strength, toughness and high durability. It has good application prospects in the fields of national accordance with technical standard for epoxy coal asphalt anticorrosive coating of buried steel pipeline defense engineering, marine engineering, nuclear industry, special security and protection engineering, and municipal engineering. Tests have proved that its flexural strength is 3 times that of ordinary C50 concrete, the shrinkage is reduced by 50%, and it is still intact after 700 freeze-thaw cycles. Therefore, it is Hoisting construction can be carried out after the foundation concrete strength reaches 100%. The anchor bolt can be tensioned to the design pretension of 926KN, and the over tensioning coefficient is 1.15. called "Never Cracking" concrete. The fan can be commissioned for power generation only after the anchor bolt is accepted. PRODUCT HIGHLIGHT PACKAGE AND STORAGE 1. UHPC is now used as the outer protective layer of the steel structure of the offshore oil platform, which Packed in PP bag, 25kg/bag. Store in a ventilated and dry place and it’s storage period is 3 months. can greatly increase the service life of the pillars in the water level fluctuation area. 2. The early strength of UHPC has developed rapidly, and the later strength of UHPC is extremely high. UHPC can be used in strengthening and repairing projects to replace steel and expensive organic polymers. It can not only maintain the integrity of the concrete system, but also reduce costs. 3. UHPC has high strength and good impact resistance. It can be used in the protective structure of national defense projects, and it can also be used in special structures that require high bearing capacity. 4. UHPC's high density and good working performance keeps the surface in contact with the template in a high smoothness status. It is difficult for harmful media from the outside to penetrate into UHPC, and it is difficult for the colorants and other components in UHPC to separate out. Therefore, UHPC can be used as exterior decoration materials of buildings by taking advantage of this feature. CONSTRUCTION PROCESS 1. Mix ratio: 2. Stir: Powder: steel fiber: water= 100: 10~30: 10; Take the powder into the mixer, add water and stir for 3~4 minutes (the material reaches a colloidal state), then add steel fiber and continue to stir (when the amount of steel fiber is large, usually not more than 3%, it can be added gradually or in batches). After the steel fibers are evenly dispersed, carry out pouring and vibrating for formation. Finally carry out curing. Sino-sina Building Materials Co.,Ltd. | www.wcrete.com | info@wcrete.com | +86 1537387