论文部分内容阅读
采用混凝土与螺纹钢筋组成的单轴抗拉试验装置及传统的劈裂抗拉试验装置,实施以早龄期为中心粉煤灰混凝土的单轴抗拉及劈裂抗拉强度试验,并与普通混凝土的试验结果作比较.试验结果表明,粉煤灰混凝土的抗拉强度随龄期的发展规律与普通混凝土存在较大差异,虽然粉煤灰在中长龄期抗拉强度有大幅增长,但其最终抗拉强度仍明显低于普通混凝土.另外,单轴抗拉强度明显高于劈裂抗拉强度,而劈裂抗拉强度与规范公式的计算结果基本接近.在对试验结果进行回归分析的基础上,分别建立劈裂、单轴抗拉强度与抗压强度的关系公式,以及劈裂-单轴抗拉强度关系式.
The uniaxial tension and splitting tensile strength test of fly ash concrete with early age as the center was carried out by using the uniaxial tensile test device consisting of concrete and rebar and the traditional splitting tensile testing device. The test results show that the tensile strength of fly ash concrete with the development of age there is a big difference with ordinary concrete, although the fly ash in the long-term tensile strength has increased substantially, but The final tensile strength is still significantly lower than ordinary concrete.In addition, the uniaxial tensile strength is significantly higher than the splitting tensile strength, while the splitting tensile strength and the formula of the calculated results are basically close to the test results of regression analysis Based on the established splitting, uniaxial tensile strength and compressive strength of the relationship between the formula, and splitting - uniaxial tensile strength relationship.