本文選題：新老混凝土粘結(jié) + 短齡期��； 參考：《長江科學(xué)院院報》2017年09期

【摘要】：試驗采用3種粘結(jié)劑對3種混凝土進(jìn)行粘結(jié),以劈拉強(qiáng)度作為評價指標(biāo),將這3種粘結(jié)劑對混凝土的粘結(jié)效果進(jìn)行對比,旨在找出3種混凝土中最適宜使用粘結(jié)劑的混凝土。另外首次提出了新老混凝土粘結(jié)強(qiáng)度新的評價指標(biāo)——粘結(jié)強(qiáng)度等效系數(shù)β(某種混凝土粘結(jié)劈拉強(qiáng)度與同種混凝土基準(zhǔn)試件劈拉強(qiáng)度的比值),并以β值作為指標(biāo)對這3種混凝土進(jìn)行對比。通過對粘結(jié)強(qiáng)度等效系數(shù)的對比可得:3種界面粘結(jié)劑用于普通硅酸鹽水泥配制的混凝土的粘結(jié)效果均優(yōu)于其它2種水泥配制的混凝土的粘結(jié)效果,普通硅酸鹽水泥配制的混凝土在新老混凝土粘結(jié)試驗中對界面粘結(jié)劑的適用性最強(qiáng),其28 d的粘結(jié)強(qiáng)度最大值可以達(dá)到混凝土基準(zhǔn)試件劈拉強(qiáng)度的0.86,粘結(jié)效果最佳。
[Abstract]:Three kinds of concrete were bonded by three kinds of binders and the splitting tensile strength was taken as the evaluation index. The effect of the three binders on concrete was compared in order to find out the most suitable concrete of three kinds of concrete with binder. In addition, the new evaluation index of bond strength of new and old concrete, the equivalent coefficient of bond strength 尾 (the ratio of some concrete bond splitting tensile strength to the splitting tensile strength of the same concrete standard specimen) is put forward for the first time, and the 尾 value is taken as the index. The three kinds of concrete are compared. Through the comparison of the equivalent coefficient of bond strength, it can be concluded that the bond effect of the concrete prepared by the three kinds of interfacial binders for ordinary Portland cement is better than that of the concrete prepared by the other two kinds of cement. The concrete prepared by ordinary Portland cement has the strongest applicability to the interfacial binder in the new and old concrete bond test. The maximum bond strength of the concrete in 28 days can reach 0.86 of the split tensile strength of the standard concrete specimen, and the bond effect is the best.
【作者單位】： 鄭州大學(xué)水利與環(huán)境學(xué)院;
【分類號】：TV431

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