Ultra-high-performance concrete including regenerated fine aggregates and application method thereof
A recycled fine aggregate, ultra-high-performance technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of poor performance of recycled fine aggregate and reduce the performance of ultra-high performance concrete, and achieve The apparent density is small, the effect of improving the number of microcracks and reducing the use
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[0020] Example 1
[0021] A kind of recycled fine aggregate ultra-high performance concrete, the mass ratio of its main raw materials is: ordinary portland cement: silica fume: quartz powder: fine aggregate: water reducing agent: water=1:0.35:0.35:1.12:0 .025: 0.243, the volume of steel fiber is 2%. According to the weight percentage of the fine aggregate, recycled fine aggregate: 50%; natural sand: 50%. The recycled fine aggregate used belongs to It is a kind of recycled fine aggregate, which partially replaces natural sand as the fine aggregate of ultra-high performance concrete. The particle size range of recycled fine aggregate is 0.15~4.75mm. Use C 2 Ordinary Portland cement with high S content, of which C 2 The content of S is 30%; use polycarboxylic acid superplasticizer. The particle size of the quartz powder is 350 mesh.
[0022] First dry mix ordinary Portland cement, silica fume, quartz powder and fine aggregate for 3 minutes; then add half of the water dissolved wi...
Example Embodiment
[0023] Example 2
[0024] A kind of recycled fine aggregate ultra-high performance concrete, the mass ratio of its main raw materials is: ordinary portland cement: silica fume: quartz powder: fine aggregate: water reducing agent: water=1:0.35:0.35:1.12:0 .025: 0.243, the volume of steel fiber is 2%. According to the weight percentage of the fine aggregate, recycled fine aggregate: 100%; natural sand: 0%. The recycled fine aggregate used belongs to It is a kind of recycled fine aggregate, which completely replaces natural sand as the fine aggregate of ultra-high performance concrete. The particle size range of recycled fine aggregate is 0.15~4.75mm. Use C 2 Ordinary Portland cement with high S content, of which C 2 The content of S is 30%; use polycarboxylic acid superplasticizer. The quartz powder uses 325 mesh quartz powder.
[0025] First dry mix ordinary Portland cement, silica fume, quartz powder and fine aggregate for 3 minutes; then add half of the water dissolved with w...
Example Embodiment
[0026] Example 3
[0027] A kind of recycled fine aggregate ultra-high performance concrete, the mass ratio of its main raw materials is: ordinary portland cement: silica fume: quartz powder: fine aggregate: water reducing agent: water=1:0.35:0.35:1.12:0 .025: 0.243, the volume of steel fiber is 2%. According to the weight percentage of the fine aggregate, recycled fine aggregate: 100%; natural sand: 0%. The recycled fine aggregate used belongs to It is a kind of recycled fine aggregate, which completely replaces natural sand as the fine aggregate of ultra-high performance concrete. The particle size range of recycled fine aggregate is 0.15~1.18mm. Use C 2 Ordinary Portland cement with high S content, of which C 2 The content of S is 30%; use polycarboxylic acid superplasticizer. Quartz powder uses 350 mesh quartz powder.
[0028] First dry mix ordinary Portland cement, silica fume, quartz powder and fine aggregate for 3 minutes; then add half of the water dissolved with water...
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