Self-compacting concrete applicable to joint section of steel structure concrete composite beam
A technology of self-compacting concrete and concrete combination, which is applied in the field of building materials, can solve problems such as the impact on the smooth construction and safe operation of the bridge, difficulties in concrete pouring and vibration, and the lack of close contact between concrete and steel cells, so as to improve volume stability, Small amount of air bubbles and voids, avoiding the effect of unstable strength
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Embodiment 1
[0031] Water 145kg / m3, P.O42.5 cement 475kg / m3, fly ash 53kg / m3, machine sand 297kg / m3, river sand 385kg / m3, 5-16mm gravel 328kg / m3, 16-25mm gravel 764kg / m3 m3, polycarboxylate high-performance water reducer 6.4kg / m3, expansion agent 53kg / m3.
[0032] After completion, the slump is 240mm and the expansion is 648mm.
[0033] The slump is 265mm, and the expansion is 635mm.
[0034] Good water retention and good segregation resistance.
[0035] The 28-day compressive strength is 69.7MPa.
Embodiment 2
[0037] Water 111kg / m3, P.O42.5 cement 475kg / m3, fly ash 53kg / m3, machine sand 326kg / m3, river sand 390kg / m3, 5-16mm gravel 328kg / m3, 16-25mm gravel 764kg / m3 m3, polycarboxylate high-performance water reducer 6.4kg / m3, expansion agent 53kg / m3.
[0038] After completion, the slump is 242mm and the expansion is 652mm.
[0039] The slump is 245mm, and the expansion is 630mm.
[0040] Good water retention and good segregation resistance.
[0041] The 28-day compressive strength is 72.3MPa.
Embodiment 3
[0043] Water 105kg / m3, P.O42.5 cement 475kg / m3, fly ash 53kg / m3, machine sand 329kg / m3, river sand 393kg / m3, 5-16mm gravel 328kg / m3, 16-25mm gravel 764kg / m3 m3, polycarboxylate high-performance water reducer 6.4kg / m3, expansion agent 53kg / m3.
[0044] After completion, the slump is 235mm and the expansion is 628mm.
[0045] The slump is 235mm and the expansion is 635mm.
[0046] Good water retention and good segregation resistance.
[0047] The 28-day compressive strength is 68.6MPa.
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