1 产品性能（ Product performance）
High efficiency mudstone dispersant is a kind of highly effective clay dispersant with strong dispersibility and permeability. It has strong permeability to shield mudstone and can quickly decompose and peel mudstone. Also can effectively solve the oil drilling and geological drilling encountered slime, mud wrapped drilling problem, the specific way principle is through decomposition stripping action, directly, quickly permeate into the clay layer structure, the clay oxidation decomposition, gradually off stripping, with water flow out.
2 产品用途（Product uses:）
Efficient mudstone dispersant is mainly suitable for shield tunneling, drilling and prospecting, power stations and oil refineries and other departments, due to the tunneling system and circulation pipeline system by mud mud deposition, the formation of a large number of mud gel deposition, blocking.
淡黄色液体 light yellow
无明显气味 No obvious smel
4 方法和效果（Method and performance）
First of all, the dispersant of high cohesive soil was prepared according to the ratio of dispersant: water =1:1 under the condition of agitation, and the agitation time was more than 5min before use.Pour the dispersant solution into the soil chamber with mud cake in batches. The first injection volume is 3T, and then turn the knife plate every half an hour to facilitate the full mixing of dispersant and soil. After 8h, 0.5t dispersant solution was injected every 2h until the injection was finished.24~48h later, start to slowly advance, the soil bin slowly discharge can be.Dispersants can also be used to prevent cake formation in shield cutters and earth pressure chambers by compounding dispersants into a 20% solution and continuously injecting them into the earth chamber during propulsive.
5 安全性能（Safety performance）
The highly effective mudstone dispersant (ZKY-202) with different proportions did not react with steel bars.
The highly effective mudstone dispersant (ZKY-202) with different proportions did not react with concrete.
The dispersant of mudstone with different proportions (ZKY-202) did not react with rubber.
Zhongke Changqing ZKY-202, anti-clay polymer for earth pressure balance Tunnel Boring Machines (TBM)
Zhongke Changqing ZKY-202 is the latest generation of anti-clay additives for tunnel boring machines. It is a liquid polymer, specially designed for clayey soils with high clogging and adhesion. It is manufactured from natural, renewable resources and presents a milestone in terms of environmental compatibility.
Fields of application
ZKY-202 can be used with the standard foam generators installed on EPB machines. It can be injected at the cutter-head, into the working chamber and screw conveyor.
Features and benefits
² Reduction of clogging and adhesion effects on the cutter-head.
² Creation of a plastic soil material which can be easily excavated and transported.
² Avoiding re-agglomeration of clay particles.
² Reduction of cutter-head torque.
² Enhance in TBM Speed.
ZKY-202 is packed in IBCs (1075 kg - slight variations depending on region).
Technical data (typical properties)
Density (20°C, g/cm³)
1.01 ± 0.03
Viscosity (20°C, Brookfield Sp.00)
< 150 mPa.s
pH (10% solution, 20 °C)
6.0 ± 1
ZKY-202 is used as an aqueous solution with typically 10-20% concentration. Injected by a foam generator, the typical foam expansion ratio (FER) varies between 6 and 18, and the foam injection ratio (FIR) between 25 and 75. If the consistency of the muck needs to be reduced, high-efficiency foam agents can be used in combination with ZKY-202. For the first use and combination with other soil conditioning agents, please keep in touch with our engineers.
ZKY-202 can be used with standard TBM dosing and foaming equipment.
Do not mix pure ZKY-202 with any other pure soil conditioning additives as this may cause immediate gel formation. If several foaming products or polymers are used, it is preferable to reserve a specific transfer or dosing pump for ZKY-202. If a transfer or dosing pump is being used for more than one product, the pump should be cleaned with water before switching to other products.
It should be stored between 5℃and 40℃. If stored in original tightly closed containers, it will have a shelf life of 12 months. Do not allow the product to freeze. Please consult our engineers prior to the use of any product that has become frozen.
Standard precautions for handling chemical products should be observed: avoid eye and skin contact and wear rubber gloves and safety glasses. If contact occurs, rinse with plenty of water. In case of eye contact seek medical advice.
Note: The information given here is true, represents our best knowledge and is based not only on laboratory work but also on field experience. However, because of numerous factors affecting results, we offer this information without guarantee and no patent liability is assumed. For additional information or questions, please contact our technical engineer.
Wuhan zhongke changqing shield technology co., LTD
No.4 nanhu village, hongshan district, wuhan city, China