摘要
地震后,科学的处理和再利用废弃混凝土成为降低灾区环境污染、开发新型材料的关键问题。为研究水灰比、再生粗骨料掺量和钢纤维掺量3个因素对钢纤维再生混凝土剪切性能的影响,采用正交试验法设计了27根等高变宽梁进行连续加载试验。试验结果表明:水灰比为0.35、再生粗骨料取代率为20%和钢纤维体积掺量为1%的配合比条件下,钢纤维再生混凝土的抗剪强度和峰值剪切模量可达到最高;主拉应变ε1p、主压应变ε3p和剪应变γp随抗剪强度τp的增大而提高,经线性回归分析得出钢纤维再生混凝土试块的峰值应变与抗剪强度的关系式。
After earthquake, scientific process and reuse of building waste concrete become the key problems for decreasing environmental pollution of stricken area and exploiting new materials. In order to study the effect of dif- ferent water cement ratio, different recycled coarse aggregate quantity and different steel fiber volume fractions on the shear behavior of steel fiber recycled concrete, with the method of orthogonal test 27 uniform depth beams were designed in the experiment which was carried out by continuous vertical loading test. It was indicated from the test results that: the highest shear strength and peak shear modulus of steel fiber recycled concrete would be obtained when 0.35 as water cement ratio, the percentage of 20% as recycled coarse aggregate and 1% as steel fiber were used to make the design of mix proportion; It was found that the experimental data fitting was better and the principal compressive strain, the principal tensile strain and the shearing strain were generally magnified with the increase of shear strength. The relationship between peak strain and shear strength could also be sorted out by linear regression analysis.
出处
《世界地震工程》
CSCD
北大核心
2016年第2期107-112,共6页
World Earthquake Engineering
基金
天津市应用基础与前沿技术研究计划一般项目(15JCYBJC48900)
关键词
再生粗骨料
正交试验
抗剪强度
剪切模量
钢纤维
recycled coarse aggregate
orthogonal test
shear strength
shear modulus
steel fiber