硬化混凝土中粗骨料和砂浆含量测定方法
Testing Method of Coarse Aggregate and Mortar Content in Hardened Concrete
关键词:
硬化混凝土;粗骨料;砂浆;相对误差
Key words:
Hardened concrete; Coarse aggregate; Mortars; relative deviation
刊期:
2017年第9期
DOI:
文章编号:
1000-4637(2017)09-77-05
基金项目:
安徽省(水利部淮河水利委员会)水利科学研究院青年科技创新基金项目(KY201404)。
作者:
张亚涛,孙述彬,刘长顺
单位:
安徽省(水利部淮河水利委员会)水利科学研究院,蚌埠 233000
摘要
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.
结论
本文采用不同的试验方法对硬化混凝土中粗骨料和砂浆含量进行了测定研究。试验结果表明,在各种不同试验方法中,整样高温处理法不仅试验结果相对误差绝对值较小,而且试验用时较短,粗骨料和砂浆的分离效果较好,是一种适宜于硬化混凝土中粗骨料和砂浆含量的测定方法。同时,整样高温处理法对硬化混凝土中水泥含量的测定也有一定的参考价值。
参考文献
引用本文
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.
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