SL/T 805-2020 in English
VALIDTechnical specification for fiber reinforced hydraulic concrete
- Issued on:2020-11-30
- Implemented on:2021-02-28
- File Format:PDF
- Delivery:Via email within 5 business days
$582.00
| Standard No: | SL/T 805-2020 |
| Document status: | VALID |
| Title in English: | Technical specification for fiber reinforced hydraulic concrete |
| Title in Chinese: | 水工纤维混凝土应用技术规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2020-11-30 |
| Implemented on: | 2021-02-28 |
| Professional Classification: | SL-Water Resources |
| Related Keywords: | fiber concrete
specification fiber typekey parametersscope steel fiber volume ratio thin-walled structure material performance comparison steel fiber reinforcement mechanism fiber type |
| Related Topics: | Ecological Concrete Application Technical Regulations
plumber Specification for Construction of Hydraulic Concrete (SL677-2014) Applications of hollow fibers Hydraulic concrete durability technology Planted concrete application technology Low temperature environment concrete application technology sl/t247-2020 |
Introduction
Analysis of the key points of the specification
| Fiber type | Key parameters | Scope of application |
|---|---|---|
| Steel fiber | Aspect ratio 40-100 Tensile strength ≥600MPa | Abrasion resistant structure, high stress area |
| Synthetic fiber | Diameter 0.01-1.2mm Elongation at break ≥15% | Crack resistance, thin-walled structure |
Material performance comparison
Steel Fiber Reinforcement Mechanism
The specification specifies the calculation formula for the standard value of the axial tensile strength of steel fiber concrete: fftk=ftk(1+αtρf(lf/df)), where the influence coefficient αt is 0.3-1.5 according to the fiber type. Engineering measurements show that adding 1.5% end hook steel fiber can increase the tensile strength of C30 concrete by 40-60%.
Construction quality control
| Inspection items | Frequency | Allowance deviation |
|---|---|---|
| Fiber content | 1 time per shift | ±5% |
| Slump | 1 time every 4h | ±20mm |
| Compressive strength | 1 group per 100m³ | ≥design value |
Special application scenarios
For the anti-abrasion parts of flood discharge structures, the specification requires that the steel fiber volume ratio should not be less than 1.0% and the cementitious material dosage should be ≥400kg/m³. A hydropower station stilling pool repair project used steel fiber concrete with a water-cement ratio of 0.35. After 5 years of operation, the wear amount was only 2.1mm.
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