What is construction sand?
In the construction industry, sand is one of the indispensable basic materials. However, many people are not clear about the concept of "construction sand" and even mistakenly believe that all sand can be used for construction. In fact, there are strict standards and classifications for construction sand. This article will combine the hot topics and hot content on the Internet in the past 10 days to provide you with a detailed analysis of the definition, classification, uses and market conditions of construction sand.
1. Definition of construction sand
Construction sand refers to natural or artificial sand that meets the standards of the construction industry and is used in concrete, mortar, masonry and other projects. Its particle size is usually between 0.15mm and 4.75mm, and it needs to meet certain requirements such as particle gradation, mud content, and solidity.
2. Classification of construction sand
Depending on the source and processing method, construction sand can be divided into the following categories:
| type | source | Features | Main purpose |
|---|---|---|---|
| natural sand | River sand, lake sand, sea sand, mountain sand | The particles are round and have low mud content. | concrete, mortar |
| Machine-made sand | Rock crushing processing | Particles with many edges and corners, controllable gradation | concrete, masonry |
| Recycled sand | Construction waste recycling | Environmentally friendly and low cost | roadbed, filling |
3. Uses of construction sand
Construction sand is widely used in various construction projects. The following are its main uses:
| use | illustrate |
|---|---|
| concrete | As fine aggregate, mixed with cement and gravel |
| mortar | Used for masonry, plastering and floor leveling |
| masonry | Brick and block bonding materials |
| roadbed | as basic filling material |
4. Market conditions of construction sand
In the past 10 days, the market price of construction sand has shown regional fluctuations due to factors such as supply and demand, environmental protection policies, etc. The following is a price guide for some regions:
| area | type | Price (yuan/ton) | Increase or decrease |
|---|---|---|---|
| East China | river sand | 120-150 | ↑5% |
| South China | Machine-made sand | 80-100 | ↓2% |
| North China | Recycled sand | 50-70 | flat |
5. Selection and precautions for construction sand
1.selection criteria: Select the appropriate type of sand according to project requirements. For example, high-strength concrete needs to use well-graded river sand or machine-made sand with low mud content.
2.Environmental requirements: With the tightening of environmental protection policies, the proportion of recycled sand and machine-made sand is gradually increasing. It is necessary to pay attention to local policy trends.
3.Quality inspection: Before use, the particle gradation, mud content, solidity and other indicators should be tested to ensure compliance with national standards.
6. Hot Topics and Trends
Recently, topics related to construction sand have mainly focused on the following aspects:
1.Eco-friendly alternative: The promotion of machine-made sand and recycled sand has become a hot topic, and many places have introduced policies to encourage the use of environmentally friendly materials.
2.price fluctuations: Affected by transportation costs and supply and demand relationships, sand prices have risen in some areas, triggering industry concern.
3.technological innovation: New technologies such as sand and gravel separation technology and intelligent sand making equipment have been widely discussed.
Through the above analysis, I believe you have a clearer understanding of construction sand. Whether in terms of classification, usage or market conditions, construction sand is an important material that cannot be ignored in construction projects.
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