Regenerated c35 synthetic fiber concrete from waste fired bricks and its preparation method
A technology for discarding sintered bricks and synthetic fibers, which is applied in the field of building materials, can solve the problems that the improvement and improvement of concrete mechanical properties and durability are not very obvious, and the crushing index is high, and achieves reasonable utilization, good water retention performance, and preparation. Simple process effect
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Embodiment 1
[0027] A recycled C35 synthetic fiber concrete from waste fired bricks, which is prepared by cement, synthetic fiber, recycled coarse aggregate from waste fired bricks, fine aggregate, water and water reducing agent at a mass ratio of 1:0.011:1.679:0.653:0.397:0.006 become.
[0028] The cement is P.O 42.5 ordinary Portland cement.
[0029] The synthetic fibers are wavy polyolefin thick fibers with a diameter of 0.60 mm to 0.80 mm, a length of 40 to 60 mm, and a tensile strength of 530 to 560 N / mm 2 , the elastic modulus is 6.5-7.5 GPa, and the specific gravity is 0.90-0.95g / cm 3 .
[0030] The bulk density of the waste sintered brick regenerated coarse aggregate is 1611 kg / m 3 , the crushing index is 31.8%, the water absorption rate is 30%, and the particle size is d 1 Mass distribution: 5 mm≤d 1 ≤10mm is 22%, 10mm1 ≤16mm is 30%, 16mm1 ≤20 mm is 26%, 20 mm1 ≤25 mm is 22%.
[0031] The fine aggregate is river sand with an apparent density of 2527 kg / m 3 , moisture conten...
Embodiment 2
[0035] The principle of this embodiment is basically the same as that of Embodiment 1, and will not be repeated. The difference is that the synthetic fiber is a continuously scored polyolefin thick fiber with a diameter of 0.70 mm to 0.90 mm, a length of 50 mm to 70 mm, and a tensile strength of 50 mm to 70 mm. 580~630 N / mm 2, the elastic modulus is 9.5-10.5 GPa, and the specific gravity is 0.90-0.95g / cm 3 .
[0036] According to GB / T50080-2002 "General Concrete Mixture Performance Test Method Standard", the working performance of the synthetic fiber concrete of the present invention was tested, and the obtained C35 synthetic fiber concrete had a slump of 90 mm.
Embodiment 3
[0038] A recycled C35 synthetic fiber concrete from waste fired bricks, which is prepared by cement, synthetic fiber, recycled coarse aggregate from waste fired bricks, fine aggregate, water and water reducing agent at a mass ratio of 1:0.013:1.695:0.693:0.389:0.007 become.
[0039] The cement is P.O 42.5 ordinary Portland cement.
[0040] The synthetic fibers are wavy polyolefin thick fibers with a diameter of 0.60 mm to 0.80 mm, a length of 40 to 60 mm, and a tensile strength of 530 to 560 N / mm 2 , the elastic modulus is 6.5-7.5 GPa, and the specific gravity is 0.90-0.95g / cm 3 .
[0041] The bulk density of the waste sintered brick regenerated coarse aggregate is 1632 kg / m 3 , the crushing index is 30.1%, the water absorption rate is 26%, and the particle size is d 1 Mass distribution: 5 mm≤d 1 ≤10mm is 25%, 10mm1 ≤16mm is 28%, 16mm1 ≤20 mm is 25%, 20 mm1 ≤25 mm is 22%.
[0042] The fine aggregate is machine-made sand with an apparent density of 2570 kg / m 3 , moisture...
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