Injection Mortar System
Product: Hilti HIT-HY 170 Injection Mortar
Description: A high-performance injection mortar system for rebar applications in concrete.
Available Packs: 330 ml foil pack, also available as 500 ml foil pack.
Suitable Rebar Diameter: Ø8 - Ø32 mm.
Visual Description: The system includes Hilti HIT-HY 170 cartridges and a rebar sample.
Benefits
- Suitable for concrete classes C12/15 to C50/60.
- Suitable for dry and water-saturated concrete.
- High loading capacity and fast cure.
- High corrosion resistance.
- For rebar diameters up to 32 mm.
- Automatic borehole cleaning using Hilti hollow drill bit for hammer drilling and accurate dosing with HDE.
- Manual cleaning for drill hole sizes ≤ 20 mm and embedment depth hef ≤ 10d.
- Suitable for embedment depth up to 1250 mm depending on the rebar diameter.
Base Material & Load Conditions
Base Material: Concrete.
Load Conditions:
- Static/Quasi-static [static icon]
- Seismic [seismic icon]
- Fire resistance [fire icon]
Installation Conditions & Other Information
Installation Conditions:
- Hammer drilled holes [hammer icon]
- Hollow drill-bit drilling [drill icon] (Note: Hollow Drill Bit (HDB) drilling is only for diameter range 8 mm – 25 mm)
Other Information:
- PROFIS Engineering Design Software [software icon]
- Concrete-to-Concrete connections Handbook [book icon]
Approvals, Certificates, and Instructions for Use
Approvals/Certificates:
- Approval No.: ETA-15/0297
- Application/Loading Condition: Static and quasi-static / Seismic / Fire
- Authority/Laboratory: DIBt, Berlin
- Date of Issue: 25-07-2025
Instructions for use (IFU) and Hilti Webpage links are available for Injection Mortar and Dispensers (IFU HIT-HY 170, IFU HDM, IFU HDE 500-A12, IFU HDE-500 22; Hilti HIT-HY 170, HDE 500-22, HDE 500-A12, HDM 500).
Rebar Material Quality: Bars and de-coiled rods class B or C according to NDP or NCL of EN 1992-1-1.
Technical Data: Static and Quasi-Static Loading (ETA 15/0297, EN 1992-1-1)
This data applies to good bond conditions. For other conditions, multiply values by 0.7. Assumes Hammer drilling (with/without Hilti hollow drill bit, compressed air drilling) and design values for a working life of 50 Years.
Design Bond Strength (fbd,PIR) in N/mm²
| Rebar - size [mm] | Concrete class | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| C12/15 | C16/20 | C20/25 | C25/30 | C30/37 | C35/45 | C40/50 | C45/55 | C50/60 | |
| Ø 8 - Ø 12 | 1.6 | 2.0 | 2.3 | 2.7 | 3.0 | 3.4 | 3.7 | 3.7 | 3.7 |
| Ø 14 - Ø 25 | 1.6 | 2.0 | 2.3 | 2.7 | 3.0 | 3.4 | 3.4 | 3.4 | 3.4 |
| Ø 26 - Ø 32 | 1.6 | 2.0 | 2.3 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
Minimum Anchorage Length and Minimum Lap Length
Post-installed rebar applications as per EN 1992-1-1.
Lap splice applications: [Diagram illustrating lap splice applications showing embedment depth and overlap length].
End anchorage applications: Simply supported / compression load-only connections. [Diagram illustrating end anchorage applications showing embedment depth and anchorage length].
The minimum anchorage length lb,min and the minimum lap length lo,min are multiplied by the relevant Amplification factor α₂ (typically 1.0 for Ø 8 - Ø 32 mm rebar).
Detailed Anchorage and Lap Lengths
Extensive tables provide detailed anchorage (lbd, lb,min) and lap lengths (lo,min, lo,PIR) for characteristic steel strength fyk = 500 N/mm² for good bond conditions, across various rebar sizes, concrete classes, and steel utilizations. These tables are presented across multiple pages of the original document.
Technical Data: Seismic Loading (ETA 15/0297, EN 1998-1)
This data applies to good bond conditions. For other conditions, multiply values by 0.7. Assumes Hammer drilling (with/without Hilti hollow drill bit, compressed air drilling) and design values for a working life of 50 Years.
Design Bond Strength (fbd,PIR,seis) in N/mm² for Seismic Loading
| Rebar Size [mm] | Concrete class | |||||||
|---|---|---|---|---|---|---|---|---|
| C16/20 | C20/25 | C25/30 | C30/37 | C35/45 | C40/50 | C45/55 | C50/60 | |
| Ø 10 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 |
| Ø 12 to Ø 16 | 2.0 | 2.3 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
| Ø 18 to Ø 30 | 2.0 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 |
| Ø 32 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 |
Technical Data: Fire Resistance (ETA 17/0297)
Anchorage length calculation for fire exposure is based on EN 1992-1-1:2004+AC:2010 Equation 8.3 using temperature-dependent bond resistance fbd,fi.
Temperature Reduction Factor kfi(θ) for Concrete Class C20/25
The reduction factor kfi(θ) decreases with increasing temperature. [Graph illustrating the relationship between temperature (θ) and the reduction factor kfi, with the formula kfi(θ) = 1.762 * e^(-0.0171 * θ) for 0 ≤ 216.2°C (capped at 1.0), and kfi(θ) = 0.0 for θ > 216.2°C].
The design bond strength fbd,fi under fire exposure is calculated as: fbd,fi = kb,fi(θ) * fbd,PIR / Yc * YM,fi.
Bond Strength (fbd,fi) in N/mm² for Fire Design
| Rebar | Concrete class | ||||
|---|---|---|---|---|---|
| 50 °C | 100 °C | 150 °C | 200 °C | 216.2 °C (θmax) | |
| C12/15 | 2.40 | - | - | - | - |
| C20/25 | 2.61 | 1.1 | 0.47 | 0.20 | 0.15 |
| C50/60 | - | - | - | - | - |
Note: Some values are not provided or are highlighted as exceeding maximum lengths in ETA-15/0297 and IFU.
Setting Information
Installation Temperature Range: -5°C to +40°C.
Service Temperature Range:
- Base material temperature range: -40°C to +80°C.
- Maximum long-term base material temperature: +50°C.
- Maximum short-term base material temperature: +80°C.
Curing and Working Time:
| Temperature of the base material T | Maximum working time (twork) | Minimum curing time (tcure) |
|---|---|---|
| -5°C to 0°C | 10 min | 12 h |
| > 0°C to 5°C | 10 min | 5 h |
| >5°C to 10°C | 8 min | 2.5 h |
| >10°C to 20°C | 5 min | 1.5 h |
| >20°C to 30°C | 3 min | 45 min |
| >30°C to 40°C | 2 min | 30 min |
Notes:
- Curing time data is valid for dry base material only. In wet base material, curing times must be doubled.
- Minimum temperature of the injection mortar during installation is +5°C.
Dispensers and Corresponding Maximum Embedment Depth (lv,max)
| Rebar | Dispenser (HDM 330, HDM 500, HDE 500) | |
|---|---|---|
| Temperature Condition | lv,max [mm] | |
| Ø8 to Ø16 | -5°C to 40°C | 1250 |
| Ø18 to Ø25 | 5°C to 25°C | 1000 |
| Ø26 to Ø32 | (Not specified for this range) | 750 |
Drilling and Installation Equipment
For detailed setting information on installation, refer to the instructions for use provided with the product.
Rotary Hammers (Corded and Cordless): TE 2 - TE 70.
Dispenser: HDE, HDM.
Other Tools:
- Blow out pump, Compressed air gun.
- Set of cleaning brushes and other accessories.
- Hammer drill bits: TE-CX, TE-YX, TE-C, TE-Y.
- Hollow drill bits: TE-CD, TE-YD.
- Piston plug and HIT-VL Extension hose.
Minimum Concrete Cover (cmin) of Post-Installed Rebar
Minimum concrete cover requirements according to EN 1992-1-1.
| Drilling method | Bar diameter [mm] | Minimum concrete cover cmin [mm] | |
|---|---|---|---|
| Without drilling aid | With drilling aid | ||
| Hammer drilling (HD) and (HDB) | Ø < 25 | 30 + 0.06 * lv ≥ 2 * Ø | 30 + 0.02 * lv ≥ 2 * Ø |
| Ø ≥ 25 | 40 + 0.06 * lv ≥ 2 * Ø | 40 + 0.02 * lv ≥ 2 * Ø | |
| Compressed air drilling (CA) | Ø < 25 | 50 + 0.08 * lv | 50 + 0.02 * lv |
| Ø ≥ 25 | 60 + 0.08 * lv ≥ 2 * Ø | 60 + 0.02 * lv ≥ 2 * Ø | |
The minimum concrete cover acc. EN 1992-1-1. The same minimum concrete covers apply for rebar elements in the case of seismic loading, i.e. cmin,seis = 2 * Ø.
Diagram Explanation: Illustrates concrete cover (c), concrete cover at end-face of existing rebar (c1), minimum concrete cover (cmin), diameter of reinforcement bar (Ø), lap length (l), effective embedment depth (lv = lo + c1), and nominal drill bit diameter (d0). Key dimensions shown include lv, c, c1, and Ø.
