High-strength concrete prepared from river pebbles
A high-strength concrete and river pebble technology, applied in the field of concrete, can solve the problems of environmental pollution and high cost of aggregate limestone mining, and achieve the effects of protecting the environment, improving work performance and concrete strength, and reasonable particle gradation distribution
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Embodiment 1
[0017] Embodiment 1: A kind of high-strength concrete prepared by using river pebbles provided by the present invention, each component and its content (in Kg / m³) are as follows: 450% cement, 719% sand, 1040% pebble gravel, 130% water , 50 of fly ash, 50 of mineral powder, 50 of silica fume, 12.0 of admixture.
[0018] Mix the above-mentioned components to obtain high-strength concrete. Among them, the cement uses ordinary Portland cement, P.O42.5; the pebble gravel is crushed and shaped by river pebbles with a particle size of 5-20mm, the crushing value index is ≤10%, and the needle-like particle content is <8 %; the sand is the river sand in zone II with a fineness modulus above 2.6, the mud content is ≤2.0%, and the mud content is ≤0.5%; Water agent; fly ash is Class F, Class I fly ash of power plant, fineness < 12%, loss on ignition < 5%; mineral powder is S95 grade mineral powder, specific surface area greater than 400㎡ / Kg, 28-day activity index greater than 100%; silic...
Embodiment 2
[0020] Embodiment 2: A kind of high-strength concrete prepared by using river pebbles provided by the present invention, each component and its content (in Kg / m³) are as follows: 400% cement, 719% sand, 1040% pebble gravel, 130% water , 50 of fly ash, 100 of mineral powder, 50 of silica fume, 12.0 of admixture.
[0021] Mix the above-mentioned components to obtain high-strength concrete. Among them, the cement uses ordinary Portland cement, P.O42.5; the pebble gravel is crushed and shaped by river pebbles with a particle size of 5-20mm, the crushing value index is ≤10%, and the needle-like particle content is <8 %; the sand is the river sand in zone II with a fineness modulus above 2.6, the mud content is ≤2.0%, and the mud content is ≤0.5%; Water agent; fly ash is Class F, Class I fly ash of power plant, fineness < 12%, loss on ignition < 5%; mineral powder is S95 grade mineral powder, specific surface area greater than 400㎡ / Kg, 28-day activity index greater than 100%; sili...
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