The quality of lime, fly ash and gravel bases should meet the following requirements:
1. The quality of lime and fly ash, the mix of gravel and mud, etc. have to meet the material specifications, and the mixture mix ratio is accurate;
2. Lime, fly ash and gravel mix are even and uniform. The maximum particle size of gravel (crushed stone) is not more than 40mm; the ash aggregate of lime and fly ash greater than 20mm shall not exceed 10%, and the maximum aggregate size shall not be greater than 50mm; lime must not contain un-digested particles and ash with a particle size greater than 10mm. ;
The quality requirements for lime, fly ash, and gravel mixes are shown in the table below.
Lime fly ash gravel quality requirements
project | Quality requirements | Inspection frequency | Inspection Method | |||
standard | Allowable deviation | range | Points | |||
compactness | Heavy compaction 95% Light compaction 98% | not lower than | 1000m2 | 1 | Sand filling method | |
Unconfined compressive strength (MPa) | R7=0.6~0.8MPa | Not less than 0.6MPa | Tian Sai District | 1 | Site sampling | |
Track area | 1 | |||||
Ash content | Design requirements | ±1% | Track area | 1 | EDTA titration | |
Tian Sai District | 1 | |||||
level whole degree | Track area | 10mm | ≤10mm | 20m | 1 | 3 meters ruler, feeler gauge |
Tian Sai District | Projects | 1 | ||||
horizontal slope | Track area | 0.1% | ±0.1% | 20m | 1 | Leveling |
Tian Han District | Projects | 1 | ||||
high Process | Track area | 10mm | no greater than | 20m | 1 | Leveling |
Tian Sai District | Projects | 1 | ||||
thickness | Design thickness | ±10mm | 1000m2 | 1 | Use steel ruler | |
width | Design thickness | not less than | 40m | 1 | Use steel ruler | |
Note: 1. Lime, fly ash, gravel mixture transported to the site of piling time should not exceed 24h;
2. Allowable deviation of ash content and water content mean the percentage of the total mass of the mixture;
3. Tiansai District "projects" refer to competition events such as long jump, high jump, pole vault, etc.;
4. Each test point is randomly sampled, the error is the maximum value;
5. The result of the cross slope should not exceed 1%;
6. The ratio of compaction to optimal density.
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