Title: What type of sand is best? ——Hot topics on the Internet and scientific sand selection guide
Recently, the topic of “sand selection” has been a hot topic on social media and building materials forums. From decoration building materials to children's sand pools, the demand for sand varies significantly in different scenarios. This article combines the hotspot data of the entire network in the past 10 days to provide you with a practical guide for scientific sand selection.
1. Ranking list of popular sand types on the entire network (last 10 days)
| Ranking | sand type | heat index | Main application scenarios |
|---|---|---|---|
| 1 | quartz sand | 9.2 | Water treatment, glass manufacturing |
| 2 | river sand | 8.7 | Building masonry, concrete |
| 3 | Machine-made sand | 7.9 | Roadbed filling, prefabricated components |
| 4 | sea sand | 6.5 | Children's playground (needs treatment) |
| 5 | foundry sand | 5.8 | metal casting model |
2. Analysis of key points for sand selection in different scenarios
1.sand for building decoration: According to the latest standards of the Ministry of Housing and Urban-Rural Development, it is recommended to use natural river sand with a mud content of <3%. The particle gradation should meet the following requirements:
| Screen size (mm) | Cumulative screening residue (%) |
|---|---|
| 4.75 | 0-10 |
| 2.36 | 15-45 |
| 1.18 | 35-70 |
| 0.6 | 65-85 |
| 0.3 | 85-95 |
2.Sand for children's sand pool: A survey on a maternal and infant platform shows that the three indicators that parents are most concerned about are:
| index | Qualification standards | Examples of preferred brands |
|---|---|---|
| pH value | 6.5-7.5 | PlaySand |
| Particle diameter | 0.2-1.0mm | Quikrete |
| Sterilization | High temperature above 220℃ | Sandtastik |
3. Recent hot debate: Can sea sand be used for construction?
There have been 230,000 related discussions in the past 10 days. The main points are as follows:
| Supporters' point of view | Opposition evidence |
|---|---|
| Desalination treatment can reduce chloride ions | Shenzhen sea sand house cracking case in 2018 |
| The cost is 40% lower than river sand | National standards prohibit direct use |
| Coastal areas are rich in resources | Risk of steel corrosion increased by 3 times |
4. Experts recommend a four-step method for selecting sand.
1.Look at the place of origin: River sand is the best product from the Yangtze River Basin, and machine-made sand is from regular mines.
2.Measure hardness: Use fingernail scratch test, high-quality sand should not produce obvious marks
3.Check purity: Take the sample and put it into a transparent water bottle. After shaking, the sediment should be <5%.
4.Check certificate: Requires a radioactive test report (Class A standard)
5. Reference for sand price trends in 2023
| type | Specification | Price (yuan/ton) | Increase or decrease |
|---|---|---|---|
| river sand | medium coarse sand | 120-150 | ↑8% |
| Machine-made sand | Class II | 75-95 | →Smooth |
| washed sand | 0-5mm | 180-220 | ↓3% |
Conclusion:Choosing the right sand requires a combination of purpose, budget, and safety. It is recommended that consumers request a test report before purchasing, and large projects should entrust a third party to conduct particle analysis. With the tightening of environmental protection policies, the replacement rate of manufactured sand is expected to reach 60% in 2025, and sand selection standards will continue to be optimized in the future.
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