高贝利特水泥混凝土的抗拉性能

发布时间：2019-02-26 17:12

【摘要】：通过劈裂抗拉试验和轴心抗拉试验,比较了不同水灰比、不同龄期的高贝利特水泥混凝土与硅酸盐混凝土的抗拉强度、极限拉伸值,研究了高贝利特水泥抗拉性能对开裂的影响。采用界面过渡区显微硬度试验、电子扫描电镜和X射线能谱分析,分别对高贝利特水泥和硅酸盐水泥混凝土界面过渡区进行了表征。结果表明:相同水灰比和龄期的高贝利特水泥混凝土的抗拉强度和极限拉伸值均大于硅酸盐水泥的;高贝利特水泥混凝土后期抗拉强度增长率大,强度高;高贝利特水泥混凝土界面过渡区厚度比硅酸盐水泥混凝土小25μm,显微硬度大8.9MPa,钙硅比低,界面黏结好。高贝利特混凝土的界面结构和抗拉性能均优于硅酸盐水泥混凝土。
[Abstract]:Through splitting tensile test and axial tensile test, the tensile strength and ultimate tensile value of high Belite cement concrete and silicate concrete with different water-cement ratio and different ages were compared. The effect of tensile properties of high belite cement on cracking was studied. The interface transition zone of high belite cement and Portland cement concrete was characterized by microhardness test, electron scanning electron microscopy (SEM) and X-ray energy spectrum (EDS) analysis. The results show that the tensile strength and ultimate tensile value of high Belite cement concrete with the same water-cement ratio and age are higher than that of Portland cement, and the growth rate of tensile strength of high-belite cement concrete at the later stage is high, and the tensile strength is higher than that of Portland cement. The thickness of interface transition zone of high Bailey cement concrete is 25 渭 m smaller than that of Portland cement concrete, the microhardness is 8.9 MPA, the ratio of calcium to silicon is low, and the interface adhesion is good. The interface structure and tensile properties of high Belite concrete are better than Portland cement concrete.
【作者单位】：山东交通学院材料科学与工程学院;中材国际工程股份有限公司;济南德利泰建材科技公司;山东省水利科学研究院;
【基金】：山东省自然科学基金(ZR2013EML007) 山东交通学院博士科研启动基金山东交通学院科研基金(Z201336)资助项目
【分类号】：TU528

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