ART-ZJL|Tunnel Grouting Material for Crown Grouting Construction

• Customization: Available
• Appearance: Powder
• Application: Concrete Admixture
• Model NO.: ART-ZJL
• Chemical Composition: Polycarboxylate-based Water Reducers
• Setting Time: Normal Setting Time
• Type: High Ratio Water Reducing Type
• Water Reduction Rate: 40%-50%
• Color: Grey
• Transport Package: IBC Tank
• Specification: ART-ZJL
• Trademark: ARIT
• Origin: Nanjing
• HS Code: 3824401000
• Production Capacity: 200000tons/Year

Product Description

ART-ZJL

Tunnel Grouting Material


Description

ART-ZJL is a tunnel grouting material, used in the crown grouting construction with formwork, is composed of cement, mineral admixtures, fine aggregates, and admixtures, which are uniformly mixed in a certain proportion. After mixing with water, it exhibits excellent fluidity, pumpability, and non-segregation properties. Once hardened, it has a slight expansion characteristic and good bonding performance with the lining concrete.

Main Characteristics

 

Good fluidity and pumpability  

No segregation and bleeding  

Slight expansion  

Rapid early strength development  

High bond strength  

Water resistance and durability
 

Applications

Crown Grouting with Formwork for Tunnel Lining
 

Physical and chemical indicator
 

Items	Performance
Appearance	Grey
Moisture Conten	0.1
Chloride ion content	2

Construction Process
 

The grouting material slurry should be mixed with water at a water-to-material ratio of 0.18. The mixing time should not be less than 3 minutes. 

After the grouting material slurry is thoroughly mixed, the discharge valve of the mixing tank should be opened to allow the slurry to flow quickly into the storage tank. The discharge valve of the mixing tank should then be closed immediately, and grouting should be carried out promptly.  

During grouting, the sequential grouting method should be adopted. It is recommended to use a digital pressure gauge. The pressure gauge of the grouting machine should have a range of 10 MPa with an accuracy not lower than 0.2 MPa; the pressure gauge below the grouting valve should have a range of 4 MPa with an accuracy not lower than 0.1 MPa.  

When grouting through grouting holes, the process should be carried out in sequence. When the grouting hole that has not been grouted yet discharges slurry with the same density as that in the mixing machine's storage tank, and the pressure gauge below the grouting valve reaches 1.0 MPa, the grouting should be switched to the next hole, and the current hole should be sealed. Grouting is completed when all grouting holes have been grouted and the density of the slurry discharging from the highest point of the end formwork is consistent with that in the mixing tank.  

After grouting is completed and the grouting connectors are replaced or removed, the pre-embedded grouting pipes should be sealed promptly. The slurry inside the pre-embedded grouting pipes should be full to prevent leakage.

Packaging

In bags,25kg/bag

Storage

When stored in the original sealed packaging under normal temperature (5~40°C) and dry conditions, the product has a shelf life of 6 months.