C190 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 of section steel and ultra/ultra-high-strength high-performance concrete, etc., and achieve good compatibility and remarkable construction quality Effect improvement, durability improvement effect
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[0049] Examples:
[0050] (1) Raw materials
[0051] 1. Cement
[0052] Choose Qinling brand P·O62.5R cement with stable quality and good performance, and conduct an adaptability test between the two with polycarboxylic acid concrete superplasticizer before use. The test method adopts the current building materials industry standard "Cement and Reducing The method in "Test Method for Water Compatibility" JC / T1083-2008 has good compatibility with polycarboxylate concrete superplasticizer. The performance indicators of the selected cement meet the requirements of the current national standards, with low alkali content, low heat of hydration and low water demand.
[0053] 2. Aggregate
[0054] The sand is medium-to-coarse and Bahe sand with smooth particles, hard texture and good gradation. The quality of the sand meets the current building materials industry standard "Standard for the quality and inspection method of sand and stone for ordinary concrete" JC / T52-2006 and the national sta...
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