Self-compacting non-contract concrete used in large-span CFST (Concrete Filled Steel Tube) arch bridge tube
A large-span, self-compacting technology, applied in the direction of arch bridges, bridges, bridge forms, etc., can solve the problems of damage, slow mixing flow rate, etc., achieve low viscosity, increase viscous resistance, and improve the effect of voiding phenomenon
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Embodiment 1
[0042] P.O42.5 cement 400kg / m 3 , fly ash 70kg / m 3 , mineral powder 35kg / m 3 , medium river sand 780kg / m 3 , gravel 940kg / m 3 , PCA-I polycarboxylate high-performance water reducer 11kg / m 3 , HME-II high-performance concrete magnesium oxide composite expansion agent 55kg / m 3 , water 165kg / m 3 .
Embodiment 2
[0044] P.II52.5 cement 350kg / m 3 , fly ash 105kg / m 3 , mineral powder 50kg / m 3 , medium river sand 780kg / m 3 , gravel 940kg / m 3 , PCA-I polycarboxylate high-performance water reducer 9kg / m 3 , HME-II high-performance concrete magnesium oxide composite expansion agent 55kg / m 3 , water 170kg / m 3 .
Embodiment 3
[0046] P.O52.5 cement 370kg / m 3 , fly ash 70kg / m 3 , mineral powder 30kg / m 3 , medium river sand 840kg / m 3 , gravel 935kg / m 3 , PCA-I polycarboxylate high-performance water reducer 10kg / m 3 , HME-II high-performance concrete magnesium oxide composite expansion agent 50kg / m 3 , water 153kg / m 3 .
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