sand gravel

简明释义

砂砾石

英英释义

例句

1.The riverbank was reinforced with sand gravel to prevent erosion.

河岸用沙砾加固，以防止侵蚀。

2.The construction site requires a large amount of sand gravel for the foundation work.

施工现场需要大量的沙砾用于基础工程。

3.The playground was covered with sand gravel to provide a soft landing for children.

游乐场用沙砾覆盖，以为儿童提供安全的着陆面。

4.For landscaping, you can use sand gravel to create decorative pathways.

在园艺中，您可以使用沙砾来创建装饰性小径。

5.We mixed sand gravel with cement to create a strong concrete mixture.

我们将沙砾与水泥混合，以制成强度高的混凝土。

作文

In the world of construction and landscaping, materials play a crucial role in determining the quality and durability of the final product. Among these materials, sand gravel (砂砾) stands out as one of the most versatile and widely used. This combination of sand and gravel is essential for various applications, including concrete production, road construction, and drainage systems. Understanding the properties and uses of sand gravel can significantly enhance our appreciation for its role in modern infrastructure.Firstly, let’s explore what sand gravel actually is. Sand gravel refers to a mixture of fine particles (sand) and larger fragments (gravel). Sand typically consists of small particles of rock and mineral, while gravel is made up of larger stones or pebbles. The size and composition of these materials can vary greatly, which allows for a wide range of applications. For instance, fine sand gravel is often used in concrete mixtures, providing a solid foundation for buildings and other structures. On the other hand, coarser sand gravel may be utilized for drainage purposes, allowing water to flow freely and preventing flooding.The importance of sand gravel in construction cannot be overstated. When mixed with cement and water, sand gravel forms concrete, one of the most widely used materials in building construction. Concrete is known for its strength and durability, making it an ideal choice for everything from sidewalks to skyscrapers. Without the right proportions of sand gravel, the integrity of the concrete could be compromised, leading to structural failures. Thus, understanding how to properly mix and utilize sand gravel is essential for any construction project.Moreover, sand gravel plays a vital role in landscaping. Gardeners and landscapers often use sand gravel to create pathways, driveways, and decorative elements in gardens. Its ability to allow water to drain efficiently makes it an excellent choice for areas that require good drainage. Additionally, sand gravel can improve soil quality by enhancing aeration and reducing compaction, which is beneficial for plant growth. Therefore, knowing how to incorporate sand gravel into landscaping projects can lead to healthier plants and aesthetically pleasing designs.In terms of environmental impact, the extraction and use of sand gravel also raise important considerations. While sand gravel is abundant in many regions, excessive extraction can lead to habitat destruction and erosion. It is crucial for construction companies and landscapers to source sand gravel responsibly and consider sustainable practices. This includes using recycled materials when possible and ensuring that extraction sites are rehabilitated after use.In conclusion, sand gravel (砂砾) is a fundamental material in both construction and landscaping. Its versatility and essential properties make it indispensable for creating durable structures and beautiful landscapes. By understanding the significance of sand gravel, we can better appreciate its role in our built environment and advocate for responsible sourcing and usage. As we continue to develop our urban spaces, the importance of such materials will only grow, highlighting the need for informed and sustainable practices in their application.