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首页> 外文期刊>Magazine of Concrete Research >High-performance concrete made with dune sand
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High-performance concrete made with dune sand

机译：高性能混凝土用沙丘沙子制成

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When concrete is placed in harsh conditions where aggressive chemicals are present, high-performance concrete that provides the highest levels of durability and technical performance is required. At the same time, locally available construction materials must be used so that the cost of concrete production is minimised. Deserts, which generally receive less than 250 mm of precipitation each year, take up about a third of the Earth's land surface. Dune sand is available in abundance in deserts. This article presents a case study of the use of dune sand to produce high-performance concrete and illustrates that large-scale usage of dune sand in real projects - where there is a degree of variability and changes in construction materials, personnel and weather over a duration of two to three years - is feasible and can result in significant cost savings. This paper reports on the lessons learned from a construction project for a 2 km tunnel in the Middle East with an intended working life of 75 years, for which very stringent requirements for high-performance concrete were stipulated in the technical specifications owing to the adverse environmental conditions. The concrete fully met the requirements even though dune sand, as partial replacement of manufactured sand, was used as fine aggregate.
机译：当混凝土放置在存在侵蚀性化学品的恶劣条件下，需要提供最高耐用性和技术性能的高性能混凝土。与此同时，必须使用本地可用的建筑材料，以便最小化混凝土生产成本。沙漠每年通常接受少于250毫米的降水量，占据地球陆地面积约三分之一。沙丘在沙漠中有丰富。本文提出了一种案例研究了沙丘生产高性能混凝土，并说明了真实项目中沙丘沙丘的大规模使用 - 在这里有一定程度的变化和建筑材料，人员和天气的变化持续时间为两到三年 - 是可行的，可以节省大量成本。本文报告了中东2公里隧道建设项目的经验教训，其预期工作寿命为75年，因为由于不利的环境，在技术规范中规定了对高性能混凝土的非常严格的要求使适应。即使沙丘沙子作为制造砂的部分替代，混凝土也充分满足了要求，用作细骨料。

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