混凝土拌和物作业指导书12》

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1、作业指导书文件代号001.12－2010第1版　第0次修订　第十二章：混凝土拌合物性能试验第一节:混凝土拌合物取样实施日期2010年2月5日参照规程编号GB/T50080-20021同一组混凝土拌合物的取样应从同一盘混凝上或同一车混凝土中取样。取样量应多于试验所需量的1.5倍；且宜不小于20L。2混凝土拌合物的取样应具有代表性，宜采用多次采样的方法。一般在同一盘混凝土或同一车混凝土中的约1/4处、1/7处和3/4处之间分别取样，从第一次取样到最后一次取样不宜超过15min，然后人工搅拌均匀。3从取样完毕到

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