fine aggregate

简明释义

细骨料

英英释义

例句

1.The construction of the sidewalk requires a specific mix of cement and fine aggregate.

人行道的建设需要特定比例的水泥和细骨料。

2.Using recycled fine aggregate can be an environmentally friendly choice.

使用再生的细骨料可以是一个环保的选择。

3.In concrete production, the quality of fine aggregate can greatly affect the final strength.

在混凝土生产中，细骨料的质量可以极大地影响最终强度。

4.We need to test the gradation of the fine aggregate before mixing it with cement.

在将其与水泥混合之前，我们需要测试细骨料的级配。

5.The engineer specified that the fine aggregate should be free of impurities.

工程师规定细骨料必须无杂质。

作文

In the field of construction and civil engineering, understanding the materials used in various applications is crucial. One such material is fine aggregate, which plays a significant role in the production of concrete and mortar. Fine aggregate refers to the granular material that passes through a sieve with a specific mesh size, typically smaller than 4.75 mm. Common examples of fine aggregate include sand, silt, and crushed stone dust. The primary function of fine aggregate is to fill the voids between larger aggregates and to provide bulk to the concrete mix. The importance of fine aggregate cannot be overstated, as it directly influences the workability, strength, and durability of the final product. When mixed with cement and water, fine aggregate contributes to the formation of a cohesive and homogenous mixture. A well-graded fine aggregate ensures that the concrete has minimal voids, resulting in a denser and more robust structure. Moreover, the choice of fine aggregate can significantly affect the properties of concrete. For instance, using clean, well-graded sand can enhance the strength and durability of concrete, while poorly graded or contaminated fine aggregate may lead to weaker structures and increased susceptibility to environmental factors. Therefore, it is essential for engineers and construction professionals to select appropriate fine aggregate based on the specific requirements of their projects.Another critical aspect to consider is the moisture content of fine aggregate. The presence of excess moisture can alter the water-cement ratio, which is vital for achieving the desired strength and workability of concrete. Therefore, before mixing, it is important to determine the moisture content of fine aggregate to ensure accurate proportions in the concrete mix design. In addition to its physical properties, the source of fine aggregate also matters. Natural sand, for example, is often preferred due to its rounded particles, which improve the workability of concrete. On the other hand, manufactured fine aggregate, such as crushed stone, can provide more angular particles that may enhance the interlocking of aggregates, thereby increasing the strength of the concrete. However, this can also lead to increased friction during mixing, which may require adjustments in water content. Furthermore, environmental considerations are becoming increasingly important in the selection of fine aggregate. The extraction of natural resources for sand and gravel can lead to ecological damage and depletion of local environments. As a result, many industries are exploring alternative sources of fine aggregate, such as recycled materials from construction and demolition waste. This not only helps reduce the environmental impact but also promotes sustainable building practices. In conclusion, fine aggregate is an essential component in the construction industry, influencing the performance and longevity of concrete structures. Its properties, such as grading, moisture content, and source, must be carefully considered to ensure optimal results. As the demand for sustainable construction increases, the use of alternative fine aggregate sources will likely play a crucial role in shaping the future of the industry. By understanding the significance of fine aggregate, professionals can make informed decisions that contribute to the creation of durable and environmentally friendly structures.

在建筑和土木工程领域，理解各种应用中使用的材料至关重要。其中一种材料是细骨料，它在混凝土和砂浆的生产中发挥着重要作用。细骨料指的是通过特定筛网尺寸的颗粒材料，通常小于4.75毫米。细骨料的常见例子包括沙子、淤泥和碎石粉。细骨料的主要功能是填充较大骨料之间的空隙，并为混凝土混合物提供体积。细骨料的重要性不容小觑，因为它直接影响最终产品的可操作性、强度和耐久性。当与水泥和水混合时，细骨料有助于形成一种粘合性和均匀的混合物。良好级配的细骨料确保混凝土具有最小的空隙，从而形成更密实和更坚固的结构。此外，细骨料的选择会显著影响混凝土的性质。例如，使用干净、级配良好的沙子可以增强混凝土的强度和耐久性，而级配不良或受污染的细骨料可能导致结构较弱，更容易受到环境因素的影响。因此，工程师和建筑专业人员必须根据项目的具体要求选择合适的细骨料。另一个需要考虑的关键方面是细骨料的含水量。过多的水分会改变水泥比，这对于实现所需的强度和可操作性至关重要。因此，在混合之前，确定细骨料的含水量非常重要，以确保混凝土配合设计中的准确比例。除了其物理特性外，细骨料的来源也很重要。例如，天然砂通常由于其圆形颗粒而更受欢迎，这改善了混凝土的可操作性。另一方面，制造的细骨料（如碎石）可以提供更多的角状颗粒，这可能增强骨料的互锁，从而增加混凝土的强度。然而，这也可能导致混合过程中摩擦增加，可能需要调整水分含量。此外，环境考虑在细骨料的选择中变得越来越重要。提取天然资源以获取沙子和砾石可能导致生态破坏和当地环境的枯竭。因此，许多行业正在探索细骨料的替代来源，例如来自建筑和拆迁废物的回收材料。这不仅有助于减少环境影响，还促进可持续建筑实践。总之，细骨料是建筑行业的重要组成部分，影响混凝土结构的性能和耐久性。其特性，如级配、含水量和来源，必须仔细考虑以确保最佳结果。随着对可持续建筑的需求增加，替代细骨料来源的使用可能在塑造行业的未来中发挥关键作用。通过理解细骨料的重要性，专业人员可以做出明智的决策，为创造耐用和环保的结构做出贡献。