What kind of river sand is good? ——Hot topics and scientific analysis of the entire network in the past 10 days
Recently, with the recovery of the construction and decoration industries, "river sand quality" has become a hot topic. This article combines the hot spot data of the entire network for the past 10 days, analyzes the standards of high-quality river sand from a practical perspective, and attaches an authoritative inspection indicator comparison table.
1. The three major focus of river sand hotly discussed across the Internet
| Ranking | Hot Topics | Discussion volume (10,000) | Core dispute points |
|---|---|---|---|
| 1 | Machine sand vs natural river sand | 128.6 | Differences in environmental protection and strength |
| 2 | The mud content of river sand exceeds the standard | 95.3 | Cases of hollow tiles |
| 3 | Illegal sand mining report | 76.8 | River ecological destruction |
2. The five gold standards for high-quality river sand
1. Granular Grade: The optimal mixing ratio is coarse sand (40%), medium sand (30%), and fine sand (30%). This combination can minimize the amount of cement.
2. Mud content: According to the GB/T14684-2022 standard, the mud content of sand for Class I construction should be ≤1.0%, and Class II should be ≤3.0%. Recent tests have shown that 38% of the samples in the market exceeded the standard.
3. Chloride ion content: Special attention should be paid to coastal areas, as exceeding the standard will lead to corrosion of steel bars. The qualification standard is ≤0.02%.
| Testing items | High-quality standards | Bad performance | Simple detection method |
|---|---|---|---|
| Water content | Hold it in a group and spread it out | Or excessively loose | On-site gripping test |
| Impurities | No shells, organic matter | Apparent black impurities | White paper friction method |
3. Data on river sand price fluctuations in 2023
Affected by environmental protection policies, the prices of river sand have shown regional differences in recent times:
| area | Medium sand price (yuan/ton) | Weekly increase | Main sources |
|---|---|---|---|
| Yangtze River Basin | 85-92 | +3.2% | Dongting Lake Sand |
| Pearl River Delta | 110-125 | +5.7% | Xijiang Sand |
| North China | 78-85 | +1.8% | Mainly made of sand |
4. Expert purchasing suggestions
1. The principle of "three views": Look at the color (blue-gray best), look at the particles (clear edges and angles), look at the certificate (there is a test report required).
2. Pay attention to special uses:
• Sand for wall building: fineness modulus 2.3-2.6
• Sand for concrete: stone content <8%
• Waterproofing project: quartz sand content is required ≥90%
5. The popularity of environmental protection alternatives increases
Data shows that the search volume of "recycled aggregate" has increased by 210% in the past 10 days. The following is a comparison of new materials:
| Material Type | Compressive strength | Price advantage | Environmental protection index |
|---|---|---|---|
| Natural river sand | 100% benchmark | - | ★☆☆☆☆ |
| Machine sand | 92-107% | 15-20% lower | ★★★☆☆ |
| Building recycled sand | 85-95% | 30-40% lower | ★★★★☆ |
Conclusion: When choosing river sand, you need to comprehensively consider project requirements, environmental standards and economic benefits. It is recommended to give priority to suppliers with legal sources and complete inspection reports to balance quality and sustainability.
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