在80年代中期发生的最近一次经济衰退期间，当大多数建筑专业人员不能充分就业甚至失业时，他在一天早晨接到了美国混凝土协会的电话。
During the last big recession in the mid-1980s, when most building professionals were underemployed, if not unemployed, he took a call one morning from the American Concrete Institute.
在美国材料试验协会标准ASTMC1550圆板试验方法基础上，提出一种改进的基于裂缝宽度量测技术的纤维混凝土(FRC)材料静定圆板试验方法。
Based on standard test method ASTM C1550 for fibre reinforced concrete (FRC), a modified round panel test method for the material performance of FRC by measuring crack opening width is presented.
全国混凝土制成品协会指出，在水泥中使用灰烬不是一个新想法。
The National Ready Mixed Concrete Association points out that using ash in cement is not a new idea.
全国混凝土制成品协会指出，在水泥中使用灰烬不是一个新想法。
The National Ready Mixed Concrete Association points out that using ash in cement is not a new idea.
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