Ultra-high performance cement-based groove type profile
An ultra-high performance, cement-based technology, applied in building thermal insulation materials, infrastructure engineering, structural elements, etc., can solve problems such as high brittleness, poor construction convenience, and large cross-section of structural components
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Embodiment 1
[0081] Ultra-high performance cement-based channel profiles, of which:
[0082] H=400mm, B=200mm, D=30mm, t=30mm, R=20mm, R 1 = 3mm;
[0083] Ultra-high-performance cement-based composite material, including cementitious material, water and water reducer, the volume of cement accounts for 21%, the cement is P·I cement with a strength grade of 52.5, and the mineral admixture is silica fume and powder Coal ash, accounting for 52.5%.
[0084] The ratio fraction of cement, silica fume and fly ash is numerically analyzed and calculated through the ideal accumulation curve and its particle size cumulative distribution curve;
[0085] 1) the ideal stacking curve formula is:
[0086] P sd =A+(100-A)·(d / D max ) π / 2e ;
[0087] Among them, P sd is the percentage of particles passing through the sieve, A is an empirical constant, d is the diameter of the sieve, D max is the maximum particle size of the particle;
[0088] The value of the empirical constant A is determined by th...
Embodiment 2
[0110] Ultra-high performance cement-based channel profiles, of which:
[0111] H=400mm, B=400mm, D=50mm, t=30mm, R=25mm, R 1 = 5mm;
[0112] Ultra-high performance cement-based composite material, including cementitious material, water and water reducer, the volume of cement accounts for 48.5%, the cement is P·I cement with a strength grade of 62.5, and the mineral admixture is silica fume, powder Coal ash and slag powder account for 17.6% by volume; the proportions of each component of the cementitious material are by the calculation method of embodiment 1, and get X c =0.734, X sf =0.107, X fa = 0.088 and X bs = 0.071. The water-to-cement ratio W / B=0.144, and the admixture is polycarboxylate superplasticizer solution, and the dosage is 2.3% of the mass of the gelling material.
[0113] The volume percentage of the main materials used in ultra-high performance cement-based composites is as follows:
[0114]
[0115] The dosage and quality ratio of each material of ...
Embodiment 3
[0123] Ultra-high performance cement-based channel profiles, of which:
[0124] H=400mm, B=200mm, D=30mm, t=30mm, R=20mm, R 1 = 3mm;
[0125] Ultra-high-performance cement-based composite material, including cementitious material, fine aggregate, steel fiber, water and water reducer, the volume of cement accounts for 26.5%, the cement is P·II cement with a strength grade of 52.5, and the mineral mixed The composite materials are silica fume, fly ash and mineral powder, accounting for 15.8%. Each component distribution fraction of gelling material is by the calculation mode of embodiment 1, gets X c =0.626, X sf =0.161, X fa = 0.102 and X bs = 0.111. The fine aggregate is natural sand with a fineness modulus of 1.4, and its volume is 0.811 of that of the cementitious material. The steel fibers are copper-plated steel fibers with a diameter of 0.2mm and a length of 13mm, and the volume content is 1.5%. The water-binder ratio W / B=0.162, the admixture uses polycarboxylate ...
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