【摘要】 通过一系列试验证明了废弃型壳砂具有良好的级配,其有害物质含量基本符合使用要求.此外,废弃型壳砂混凝土的配置试验和基本力学性能试验结果进一步表明,废弃型壳砂混凝土的流动性较差,水灰比、砂率和龄期对废弃型壳砂混凝土的抗压强度影响巨大.最后并通过拟合得到了废弃型壳砂混凝土的受压应力-应变全曲线方程。更多还原

【Abstract】 A series of tests indicate that waste foundry sand(WFS) satisfies the engineering requirements set for aggregate gradation level with its noxious components within the technical tolerance.Based on the test results of ingredient mixing and basic mechanics properties,it is found that the fluidity of WFS concrete is not up to technical standards,and the stress resistance is greatly affected by water-to-granule ratio,sand proportion and time lapse.A complete curvilinear function indicating the relation between stress and strain is obtained using fitting technique for WFS concrete.更多还原