What kind of stones are used for concrete: Analysis of popular topics across the entire network and guide to structured data
Recently, discussions on concrete mixing and material selection have become a hot topic among construction industry and DIY enthusiasts. This article combines the search data of the entire network in the past 10 days to analyze the selection criteria for concrete gravel in detail and provide structured data reference.
1. Core indicators of concrete gravel
According to construction industry standards, concrete gravels must meet the following key parameters:
| Indicator type | Technical requirements | Detection method |
|---|---|---|
| Particle size range | 5-40mm (three levels: thick/medium/fine) | Screening test |
| Crush value | ≤20% (concrete below C30) | Pressure tester |
| Mud content | ≤1.0% (high strength concrete) | Washing method |
| Needle sheet content | ≤15% (regular engineering) | Vernier caliper measurement |
2. Comparison of recent popular stone types
According to the building materials market research data, the application proportion of mainstream gravel types in 2023 is as follows:
| Pebbles type | market share | Average price | Applicable strength |
|---|---|---|---|
| Granite gravel | 38% | 85-120 yuan/ton | Below C50 |
| Limestone gravel | 45% | 65-95 yuan/ton | Below C40 |
| Basalt crushed stone | 12% | 110-150 yuan/ton | C60 or above |
| Recycled aggregate | 5% | 40-60 yuan/ton | Below C20 |
3. Selection suggestions in engineering practice
According to recent engineering cases statistics, there are obvious differences in the selection of gravels in different scenarios:
| Project Type | Recommended stones | Particle size requirements | Things to note |
|---|---|---|---|
| Foundation cushion | Limestone | 20-40mm | Can be mixed with 30% recycled material |
| Beam slab column structure | granite | 5-31.5mm | Strictly control mud content |
| Pavement floor | Basalt | 10-30mm | Crush value ≤16% |
| Prefabricated components | Machinery sand stone | 5-20mm | Grading continuous |
4. Recent industry technical trends
1. According to the latest report of the China Building Materials Federation,Pebble grading optimization technologyCan increase the strength of concrete by 12-15%
2. Promotion in many placesRecycled aggregate of construction wasteApplication, usage in 2023 increased by 23% year-on-year
3.Intelligent sorting equipmentThe penetration rate of gravel production lines has reached 68%, significantly improving material uniformity
5. Consumers pay attention to hot topics
According to search engine data analysis, the top 5 issues that users are most concerned about in the past 10 days:
| Ranking | Question keywords | Search volume increase |
|---|---|---|
| 1 | Home decoration concrete gravel specifications | 142% |
| 2 | Method for detecting mud content of gravel | 87% |
| 3 | Which type of stone is the cheapest | 65% |
| 4 | Relationship between particle size and strength of gravel | 53% |
| 5 | Risk of sea sand replacing gravel | 41% |
6. Purchase suggestions
1.Strength matching principle: Limestone can be selected for concrete below C30, granite is recommended for concrete above C40
2.Economic considerations: Ordinary construction projects can use stones with rich local reserves
3.Sustainable Choice: Non-load-bearing structures can try to incorporate recycled aggregates within 30%
4.Acceptance points: The inspection report provided by the manufacturer must be requested, focusing on the crushing value and mud content data
Note: The data statistics cycle in this article is from November 1 to 10, 2023, and the data sources include building materials market research, industry association reports and mainstream search engine statistics.
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