Infrastructure development projects in Oman are at a peak which results in a huge requirement for the construction materials. Aggregates are one of the most common materials naturally available and used in both cement and asphalt concrete apart from being used as under laying material. The evaluation of aggregates physical, chemical and mechanical properties thus becomes important as it directly affects the product in which they are used as a constituent. Aggregates should be hard and tough enough to resist crushing, degradation and disintegration from any associated activities including manufacturing, stockpiling, production, placing and compaction. In this article, an attempt is made to develop a modified method to determine the abrasion resistance of aggregates. Different sizes of aggregates obtained from two natural sources in Oman were tested in the laboratory using both the standard and modified Los Angles Abrasion (LAA) test, and a mathematical relationship is developed. Based on this relationship, the standard LAA value can be determined from the modified method results. In the modified LAA test method, the time required for the test is reduced by 24 h, apart from reducing the resources required for the test. Since the modified LAA method is developed considering Oman climatic and geological conditions, there is a possibility that this method and mathematical relationship may not be valid in a region when these conditions are changed. In such satiation, the modified LAA test method and mathematical relationship described in this article may need to be validated before it is adopted.

中文翻译：

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洛杉矶磨损试验的改进方法

阿曼的基础设施开发项目正处于高峰期，对建筑材料的需求量很大。骨料是最常见的天然材料之一，除了用作底层材料外，还用于水泥和沥青混凝土。因此，对骨料物理、化学和机械性能的评估变得很重要，因为它直接影响使用它们作为成分的产品。骨料应该足够坚硬和坚韧，以抵抗任何相关活动（包括制造、储存、生产、放置和压实）的压碎、降解和分解。在本文中，尝试开发一种改进的方法来确定集料的耐磨性。在实验室中使用标准和改进的洛杉矶磨损 (LAA) 测试对从阿曼的两个天然来源获得的不同尺寸的骨料进行了测试，并建立了数学关系。基于这种关系，可以从修改后的方法结果中确定标准 LAA 值。在改进的 LAA 测试方法中，测试所需的时间减少了 24 小时，同时减少了测试所需的资源。由于改进的 LAA 方法是考虑到阿曼的气候和地质条件而开发的，因此当这些条件发生变化时，该方法和数学关系可能在某个地区无效。在这种情况下，本文描述的修正 LAA 测试方法和数学关系可能需要经过验证才能采用。