【摘要】：為了提高惡劣環(huán)境下混凝土結(jié)構(gòu)耐久性,基于功能梯度材料理念,利用無(wú)細(xì)觀界面過(guò)渡區(qū)水泥基材料的高抗裂自修復(fù)、低離子傳輸能力,對(duì)混凝土構(gòu)件進(jìn)行梯度復(fù)合結(jié)構(gòu)設(shè)計(jì),主動(dòng)增強(qiáng)保護(hù)層�？紤]構(gòu)件體型、內(nèi)外層材料差異及現(xiàn)場(chǎng)施工,研究梯度結(jié)構(gòu)混凝土構(gòu)件制備方法,并對(duì)1∶5縮尺構(gòu)件及足尺構(gòu)件進(jìn)行性能試驗(yàn)。結(jié)果表明:GSCM不會(huì)發(fā)生體積變形不一致性破壞;與傳統(tǒng)的單層混凝土構(gòu)件相比,GSCM表層的強(qiáng)度提高幅度為30%;GSCM面層僅存在少量寬度在0.02~0.05 mm之間不可見(jiàn)裂紋,而傳統(tǒng)的單層構(gòu)件存在寬度在0.2~0.5 mm的可見(jiàn)裂紋;GSCM滲透深度與氯離子擴(kuò)散系數(shù)分別為0 mm和6.3×10~(-13)m~2/s,而傳統(tǒng)的單層構(gòu)件為15 mm和12.8×10~(-13)m~2/s;三環(huán)拼裝性能良好,滿足工程要求。
[Abstract]:In order to improve the durability of concrete structures under harsh environment, based on the concept of functionally graded materials, the gradient composite structure of concrete members is designed by using the high crack resistance self-repairing and low ion transport ability of cement based materials in the transition zone without meso interface. Active enhancement of protective layer. Considering the shape of components, material difference between inner and outer layers and site construction, the preparation method of gradient structure concrete members was studied, and the performance tests of 1:5 shrinkage and full scale members were carried out. The results show that the volume deformation inconsistency failure will not occur in the WGSCM, and the strength of the surface layer of the GSCM is increased by 30% than that of the conventional monolayer concrete members. There are only a few cracks in the surface layer whose width is between 0.02 and 0. 05 mm, and only a few cracks can not be seen in the surface layer of the GSCM. The conventional monolayer members have a penetration depth and a chloride diffusion coefficient of 0 mm and 6. 3 脳 10 ~ (-13) m ~ (-2 / s), respectively, with a width of 0. 2 ~ 0. 5 mm, while the traditional monolayer members are 15 mm and 12. 8 脳 10 ~ (-13) m ~ (2 / s) respectively, and the three-ring assembly has good performance to meet the engineering requirements.
【作者單位】： 云南民族大學(xué)電氣信息工程學(xué)院;寧波工程學(xué)院建筑與交通工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51569035) 浙江省自然科學(xué)基金項(xiàng)目(LY15E080014) 浙江省本科院校中青年學(xué)科帶頭人學(xué)術(shù)攀登項(xiàng)目(pd2013426)
【分類號(hào)】：U442.5

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