【摘要】：結(jié)合沈陽寶能環(huán)球金融中心大體積底板混凝土施工及技術(shù)要求,進(jìn)行配合比設(shè)計(jì)與性能研究。采用正交優(yōu)化實(shí)驗(yàn)方法,結(jié)合水化溫升計(jì)算結(jié)果,確定最優(yōu)配比。在確保強(qiáng)度的前提下,底板大體積混凝土采用大摻量礦物摻和料的方式,降低混凝土水化溫升,混凝土28d的自收縮率為1.8×10~(-4),28d干燥收縮率為6.6×10~(-4)。采用快凍法,當(dāng)凍融循環(huán)400次,質(zhì)量損失率為2.1%,符合國標(biāo)中小于5%的規(guī)定;當(dāng)凍融循環(huán)500次,動(dòng)彈模量損失為58.2%,符合國標(biāo)中不大于60%的規(guī)定。
[Abstract]:Combined with the construction and technical requirements of mass floor concrete in Shenyang Baoneng Global Financial Center, the mix ratio design and performance research are carried out. The optimum ratio was determined by orthogonal optimization method and the calculated results of hydration temperature rise. On the premise of ensuring the strength, the mass concrete of bottom slab adopts the way of mass mineral admixture to reduce the temperature rise of concrete hydration, and the autogenous shrinkage of concrete is 1.8 脳 10 ~ (-4) ~ (-4) ~ (-4) in 28 days and the shrinkage rate of drying is 6.6 脳 10 ~ (-4) in 28 days. When the freeze-thaw cycle is 400 times, the mass loss rate is 2.1, which accords with the stipulation of less than 5% in the national standard, when the freeze-thaw cycle is 500 times, the dynamic elastic modulus loss is 58.2%, and the loss of dynamic elastic modulus is not more than 60% in the national standard.
【作者單位】： 中建商品混凝土沈陽有限公司;遼寧鑫旺混凝土有限公司;
【分類號(hào)】：TU528

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本文編號(hào)：2149256