Concrete used for steel reinforced concrete composite structure and having C230 strength grade
A technology of strength grade and combined structure, which is applied in the direction of mixed operation control, mixed operation control device, ceramic molding machine, etc., can solve the problems of poor natural bonding performance, etc., and achieve the effects of improving construction efficiency, saving steel materials, and high workability
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[0069] (1) Raw materials
[0070] 1. Cement
[0071] Select Qinling brand P·Ⅰ62.5R cement with stable quality and good performance, and conduct an adaptability test with polycarboxylate concrete high-performance water reducer before use. The test method adopts the current building materials industry standard "Cement and The method in JC / T 1083-2008 Compatibility Test Method of Water Reducer has good compatibility with polycarboxylate concrete high performance water reducer. The performance indicators of the selected cement meet the requirements of current relevant national standards such as "Portland Cement and Ordinary Portland Cement" GB175-2007. It has low alkali content, low heat of hydration, and low water demand.
[0072] 2. Aggregate
[0073] Use sand and quartz sand with a mass ratio of 8:2.
[0074] The sand is medium-to-coarse and Bahe sand with smooth particles, hard texture, and good gradation. The quality of the sand conforms to the current building material in...
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