当布劳恩I雷竞技好Newbee赞助商ntertec涉及涉及关岛的安德森空军基地时，工作范围最初仅用于岩土工程咨询。雷竞技的电竞比分网它增加了包括评估用于构建南跑道的聚集体。
跑道的混凝土混合设计要求使用1-1 / 2“和3/4”碎石灰石。According to the job specifications, the material had to be evaluated per a modified version of ASTM C 295 “Standard Guide for Petrographic Examination of Aggregates for Concrete” and the U.S. Army Corps of Engineer’s protocol CRD-C 130-01, “Standard Recommended Practice for Estimating Scratch Hardness of Coarse Aggregate Particles.” The credentials for the individual performing the tests are quite demanding. Our petrography department has one out of only a handful of individuals within the United States who could perform this test to the level demanded by the U.S. Army Corps of Engineers. In addition, the work had to be performed by an accredited laboratory meeting the requirements of ASTM C 1077, “Standard Practice for Laboratories Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Laboratory Evaluation.” Braun Intertec met those strict requirements.
在岩画部门评估样品之前，聚集实验室进行了几次测试。单个样品由200磅为200磅，用于1-1 / 2“粗骨料和25磅的3/4”粗骨料。将每个样品洗涤并分级，然后检查粘土块和易碎的颗粒，以及在2.0和2.4比重处的轻质颗粒测试。由于其尺寸，这些大型样本比我们实验室内的传统ASTM测试运行时间更长16倍。一旦所有这些测试完成，将样品翻新到岩画中进行最终分析。
测试方法涉及在样品中确定几乎每种颗粒的划伤硬度。此外，检查每个颗粒的颗粒，用于使跑道不适合使用。任何被认为有问题的材料都陷入了各种类别，包括粘土铁通石，燧石和街石，粘土岩，泥岩和砂岩，以及斯瓦里和野草材料。这些类别有助于解释最终结果。
当竞争实验室错误分类在2.4比重溶液中漂浮的材料时，我们的岩画部门解决了一个主要的绊脚石。错误可能已经取消了跑道中使用的总和。在24小时内，基于我们的岩画部门的快速审查和评论解决了关键问题。
