C200 strength-grade concrete for formed steel concrete composite structure
A technology of strength grade and combined structure, applied in the field of building materials, can solve the problems of poor natural bonding performance, poor natural bonding performance between profiled steel and super/ultra-high-strength high-performance concrete, etc., and achieve good compatibility and remarkable construction quality. Improved effect, effect of improved natural bonding properties
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[0053] (1) Raw materials
[0054] 1. cement
[0055] Select Qinling brand P·O 62.5R cement with stable quality and good performance, and conduct an adaptability test with polycarboxylate concrete superplasticizer before use. The test method adopts the current building materials industry standard "Cement and Reducer The method in JC / T 1083-2008, Test Method for Compatibility of Water Agents, has good compatibility with polycarboxylate concrete superplasticizers. The performance indicators of the selected cement meet the requirements of the relevant current national standards, and its alkali content is low, its heat of hydration is low, and its water demand is also low.
[0056] 2. aggregate
[0057] 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 industry standard "Sand and Stone Quality and Inspection Method Standards for Ordinary Concrete" JC / T 52-2006 and...
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