What is the thickness of sand?
In the fields of construction, engineering and geology, the thickness of sand is an important physical property that directly affects the performance and use of the material. The thickness of sand is usually expressed by particle size distribution, screening analysis and related standard indicators. This article will introduce in detail the method of expressing the thickness of sand, and combine the popular topics and hot contents of the entire network for the past 10 days to provide structured data and analysis.
1. Method for expressing the thickness of sand
The thickness of sand is mainly expressed through the following indicators and classification methods:
| Expression method | illustrate | Common standards |
|---|---|---|
| Screening analysis | The sand is sorted by particle size through a standard screen and the percentage of each particle group is calculated | ASTM C136, GB/T 14684 |
| Average particle size (D50) | Sieve hole size through which 50% of the particles in the sand sample passes | ISO 14688 |
| Fine Module (FM) | Reflect the overall thickness of the sand. The larger the value, the thicker the sand is. | ASTM C125 |
| Inhomogeneity coefficient (Cu) | D60/D10, reflects the particle size distribution range | Commonly used in geological engineering |
2. The relationship between the popular topics on the entire network in the past 10 days and the thickness of sand
In light of recent hot spots, the thickness of sand has sparked discussion in the following areas:
| Hot Topics | Related content | Source of data |
|---|---|---|
| Carbon neutral construction | Fine sand replaces traditional materials to reduce carbon emissions | Sina Finance (2023) |
| 3D printing building materials | Study on the fluidity of sand particles with particle size 0.1-0.3mm | Materials Today |
| Desert control | The particle size threshold value of coarse sand covering suppression of sand | CCTV News Special Topic |
| Chip manufacturing | Breakthrough in particle size control technology of high-purity silica sand | Nature Electronics |
3. Comparison of the classification and use of typical sand
Common categories according to fineness modulus (FM):
| Sand type | Fine Module Range | Main uses |
|---|---|---|
| Extra fine sand | 0.7-1.5 | Decorative mortar, putty |
| Fine sand | 1.6-2.2 | Ordinary concrete |
| Middle sand | 2.3-3.0 | Building masonry |
| coarse sand | 3.1-3.7 | Roadbed filling |
4. Technology Frontier: AI Sand Grain Analysis System
Among recent hot technologies, machine learning-based sand analysis systems have become the focus. The AI model developed by a research team can output the following parameters in real time:
| Analysis parameters | Traditional methods take time | Time-consuming for AI systems |
|---|---|---|
| Particle size distribution curve | 4-6 hours | 15 seconds |
| Fine modulus calculation | 2 hours | real time |
| Shape coefficient analysis | Special equipment required | Image recognition is completed |
The system has achieved a detection accuracy of 98.7% during the construction of Xiongan New Area, and related papers have been selected as the best papers of the IEEE International Conference.
5. Global Sand Resources Dynamics
News of International Sand Resources in the past 10 days:
| area | event | Influence |
|---|---|---|
| Southeast Asia | Vietnam restricts coarse sand exports | China's import sand price rose 12% |
| middle East | Desert fine sand purification technology is put into production | Annual production capacity reaches 2 million tons |
| Europe | Issuing new sand and gravel environmental protection standards | Requires D50±0.1mm control |
In summary, the thickness of sand is expressed through quantitative indexes such as screening analysis and fineness modulus, and its control technology is deeply integrated with hot spots such as AI and carbon neutrality. The rational selection of sand materials requires comprehensive consideration of particle size distribution, regional resources and technological development trends.
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