Product introduction


The concrete shield trenchless repair mortar H-70 is a kind of high-performance cement-based composite material developed independently according to the requirements of trenchless lining repair by in-situ shotcreting method. It has the characteristics of ultra-high strength, wear resistance and corrosion resistance. It is widely used in municipal inspection, drainage pipe, repair and reinforcement of various box culverts and tunnels.


technical parameter

序号	检验项目		性能要求	检验依据
1	抗压强度/MPa	24h	≥25	GB/T 17671-1999
		28d	≥65
2	抗折强度/MPa	24h	≥3.5
		28d	≥9.5
3	凝结时间/min	初凝	≤120	GB/T 1346-2001
		终凝	≤360
4	静压弹性模量/GPa	28d	≥30	JGJ/T 70-2009
5	拉伸粘接强度/MPa	28d	≥1.5
6	抗渗性能/MPa	28d	≥1.5
7	收缩率/%	28d	≤0.1
8	抗冻性		≥100次
9	水料比	0.15

 

applied technology

Repair technology of inspection well by centrifugal casing CCM Technology

Technical characteristics of well shield

1. Structural repair, lining can bear various loads

2. No need to go down the well, good safety, repair the deepest inspection well in the world - 30.5m deep

3. Fully automatic two-way centrifugal casing, dense and uniform lining, and the thickness can be adjusted at will

4. Fiber reinforced lining slurry with special formula, high strength, good impermeability and durability, can be poured on wet base

5. The lining and the base are tightly bonded as a whole, which has a good effect on the reinforcement and repair of the old inspection well

6. The lining is formed once, with good integrity and excellent water tightness

7. Low equipment input, simple operation, low personnel requirements and high construction efficiency

8. Completely trenchless, resistant to H 2S gas corrosion, with a service life of 50 years

 

 

CCCP technology for pipeline repair by centrifugal casing

Technical features of shield

1. Structural repair, applicable pipe diameter 0.3-4.0m

2. For repair of concrete pipe, metal pipe, brick pipe and various pipe culverts

3. Fully automatic centrifugal casing, uniform and dense lining

4. One time repair distance can reach 150m, no joint in the middle, not restricted by bending section

5. The lining is tightly bonded with the base, which has good effect on the reinforcement and repair of the old pipeline structure

6. The lining thickness can be increased or reduced at any part of the pipe section to save the engineering cost to the greatest extent

7. Fiber reinforced lining slurry with special formula, high strength, good impermeability and durability, can be poured on wet base

8. Completely trenchless, no obvious reduction of over-current capacity, resistance to H 2S gas corrosion, service life up to 50 years

 

  itu pouring repair of pipe culvert (tunnel)

The early construction of masonry or cas-in-place large section pipe culvert (tunnel) structure, due to the long operation time, corrosion, structural damage and other problems are very common. It is an ideal solution for the reinforcement and repair of old pipe culvert (tunnel) structure that in-situ pouring high-performance mortar lining technology combined with reinforcement and repair technology of steel mesh. The main construction procedures are: pretreatment, base leveling, hanging steel mesh, manual pouring of high-performance mortar, troweling.

Microbial corrosion (MIC) is a serious problem in concrete drainage system. Under anaerobic conditions, anaerobic microorganisms reduce sulfate in wastewater to sulfide, and combine with hydrogen ion in water to produce hydrogen sulfide gas. Under the action of microorganism, hydrogen sulfide is oxidized to sulfuric acid, which reacts with calcium hydroxide in concrete and transforms it into calcium sulfate, causing concrete corrosion. Once hydrogen sulfide corrosion occurs in concrete facilities, its service life is generally less than 10 years, and microorganisms play a key role in the corrosion process.


"Concrete shield" is a kind of strong cationic polymer. Most bacteria will break and die when they contact the concrete treated by "concrete shield". The break of cell membrane is caused by potential difference and will not induce gene variation of microorganism. "Concrete shield" is a kind of safety and environmental protection microbial protection material, the charge in the material will not be consumed, nor will it transfer or produce toxic substances.