张亚涛,孙述彬,刘长顺
张亚涛,孙述彬,刘长顺.硬化混凝土中粗骨料和砂浆含量测定方法[J].混凝土与水泥制品,2017(9):77-81.
ZHANG Y T, SUN S B, LIU C S.Testing Method of Coarse Aggregate and Mortar Content in Hardened Concrete[J].China Concrete and Cement Products,2017(9):77-81.
硬化混凝土中粗骨料和砂浆含量测定方法
张亚涛,孙述彬,刘长顺
张亚涛,孙述彬,刘长顺.硬化混凝土中粗骨料和砂浆含量测定方法[J].混凝土与水泥制品,2017(9):77-81.
ZHANG Y T, SUN S B, LIU C S.Testing Method of Coarse Aggregate and Mortar Content in Hardened Concrete[J].China Concrete and Cement Products,2017(9):77-81.
摘 要:为了能够简洁高效地测定出硬化混凝土中粗骨料和砂浆含量,成型了特殊形状的一定配比的混凝土试件,标准养护一年后,基于弹性理论、界面过渡区理论和冻融理论,发现效果最好的检测方法是整样高温处理法——“(105±5)℃烘至恒重的整个试样在(520±10)℃环境下1h,空气中冷至室温,人工分离出粗骨料和砂浆”,利用该方法能有效地使硬化混凝土中粗骨料和砂浆含量测定结果相对误差绝对值分别控制在3%和2%以内,试验时间为4d,并且该方法对硬化混凝土中水泥含量的测定具有一定的参考价值。
Abstract: In order to get the efficient method that can be determined the content of coarse aggregate and mortar in hardened concretes, special shape samples with a certain ratio were prepared. After the concrete samples were cured for a year in a standard environment, based on elasticity theory, interface transition zone theory and Freeze-thaw theory, an ideal determination method is found that after drying at (105±5)℃, whole sample was treated at (520±10)℃ for 1h, then sample temperature is cooled to room temperature, and then artificial separates from coarse aggregate and mortar. By using this method, the absolute value aboutrelative deviation of coarse aggregate and mortar content of hardened concrete is set within 3% and 2%, and the results can be obtained during 4 days. This method can give some help to the determination of cement content in hardened concretes.
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