GB/T 35159-2017 in English
VALIDFlash setting admixtures for shotcrete
- Issued on:2017-12-29
- Implemented on:2018-11-01
- File Format:PDF
- Delivery:Within 1 day
$241.00
《GB/T 35159-2017喷射混凝土用速凝剂》由TC197（全国水泥制品标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
National Standard of the People's Republic of China GB/T 35159—2017
Accelerators for shotcrete
| Table 1: Comparison of general requirements | |||
|---|---|---|---|
| Item | Liquid accelerator FSA-L | Powdered accelerator FSA-P | |
| Density/(g/cm2) | When D>1.1, it should be controlled within D±0.03 When D≤1.1, it should be controlled within D±0.02 | - | |
| pH value | ≥2.0, and should be within ±1 of the control value of the manufacturer | - | |
| Moisture content/% | - | ≤2.0 | |
| Fineness (80μm square hole sieve residue)/% | - | ≤15 | |
| Solid content/% | When S>25, it should be controlled at 0.95S～1.05S When S≤25, it should be controlled at 0.90S～1.10S | - | |
Performance requirements for neat mortar and mortar
The performance of neat mortar and mortar with accelerators shall comply with the requirements of Table 2:
| Table 2: Performance of neat mortar and mortar with accelerators | |||
|---|---|---|---|
| Item | Alkali-free accelerator FSA-AF | Alkali accelerator FSA-A | |
| Setting time of neat mortar | Initial setting time/min ≤5 Final setting time/min ≤12 | Initial setting time/min ≤5 Final setting time/min ≤12 | |
| Mortar strength | 1d compressive strength/MPa ≥7.0 28d compressive strength ratio/% ≥90 90d compressive strength retention rate/% ≥100 | 1d compressive strength/MPa ≥7.0 28d compressive strength ratio/% ≥70 90d compressive strength retention rate/% ≥70 | |
Implementation suggestions
1. When selecting an accelerator, its type (alkali-free or alkali-containing) and form (liquid or powdery) should be determined according to the project requirements and construction environment.
2. Before use, the setting time of the slurry and the strength of the mortar should be tested in accordance with the standard to ensure that the project requirements are met.
3. Pay attention to the storage conditions of the accelerator to avoid moisture, exposure to the sun and freezing to ensure its stable performance.
4. During the construction process, it is recommended to conduct a small test according to the actual conditions and adjust the dosage to achieve the best effect.
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB 46039-2025 in English
Safety technical specification for concrete admixtures
2025-08-01 -
GB/T 37990-2019 in English
Technical requirements of anti-washout admixture for underwater concrete
2019-08-30 -
GB/T 8075-2017 in English
Terms of concrete admixtures
2017-12-29 -
GB/T 29417-2012 in English
Standard test methods for drying shrinkage stress and cracking possibility of cement mortar and concrete
2012-12-31
