In asphalt mixtures, coarse aggregate refers to crushed stones, crushed gravel, screened gravel, and slag with a particle size greater than 2.36mm; In cement concrete and cement stabilized crushed stone, coarse aggregate refers to crushed stone gravel and crushed gravel with a particle size greater than 4.75mm

Rock is a solid aggregate composed of one or several minerals and natural glass, with a stable appearance. A rock composed of one mineral is called a monomineral rock, such as marble composed of calcite, quartzite composed of quartz, etc; Rocks composed of several minerals are called composite rocks, such as granite composed of minerals such as quartz, feldspar, and mica, and gabbro composed of basic plagioclase and pyroxene. Liquids without a certain shape, such as oil, gases such as natural gas, and loose sand and mud, are not rocks

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

100% inspection and testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Testing and testing characteristics:

1. The testing industry is fully covered, meeting different testing needs

2. Fully cover the laboratory and allocate localized testing nearby

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China