TAC Corporation, in pursuit of happiness of all employees, and pursuing zero subsidence in all TBM construction projects.

Class

Sub-Group

Product Name

True SG

(Bulk SG)

Hydrogen ion index [pH]

Principle Component

Packing

Characteristics

Minerals

Clay

Bentonite

TAC-α
TAC-βⅡ
TAC-β

2.6

6.9～9.2
neutral

♯250（＜63μm）
♯250（＜63μm）
♯200（＜75μm）

Bulk
1t FIBC
25kg bag

Supplement the fine grains from the target excavation ground, stabilizing the fluidity of excavated earth and sand.

Surfactants

Foaming agent

KT-10C

1.03

7.0
neutral

Anionic and Synthetic Surfactant Systems

18kg can
200kg drum
1t IBC

Secure the fluidity of excavated earth and sand. Effective for prevention of adhesion in viscous soil due to dispersion effect of surfactant. Improved water barrier due to pressure effect.

Penetrant

(Peptizer)

TAC Philt

0.9

8.0～9.0
Weak Alkaline

Fatty Acid Salts

17kg can

A low foaming surfactant lowers the surface tension of the clay surface and permeates the liquid between the particles. Highly effective at lowering the N value of volcanic clay.

Polymers

Flocculants

TAC Through

1.06

7～8
neutral

Polyacrylic acid

Sodium

Anionic PAM

18kg can
1t IBC

Absorbs fine grains in excavated soil and aggregated soil and water together, ensuring fluidity in sandy soil and preventing sludge in viscous soil. The surface of viscous soil particles have a coating which prevents adhesion.

Complex

TAC Carry

（0.8）

6～8
neutral

Complex polymer composed of super absorbent resin (SAP) and nonionic thickener (HEC)

20kg bag
500kg bag

Composite polymer additives developed for pumping earth, sand and gravel. In addition to the thickening effect, the granular material formed by the water absorbent resin substitutes for the fine grain content of the ground so as to impart high fluidity.

Dispersant

TAC Parate

1.3

6～7
neutral

Polycarbolic Acid

Sodium

20kg can

Absorbs to the surface of clay particles and increases the surface charge thus increasing the repulsive force. Because it manifests physical steric hindrance, it is effective for prevention of reattachment and can reduce the injection rate of viscous soil.

Natural Polymers

Thickener

TAC TectaーP

（0.3）

8.5～9.5
Weak Alkaline

α-Glucose
Amylopectin

15kg bag

Polymer additives using ingredients derived from plants. They develop high viscosity by dissolving in water. Since it is natural in origin, there is no environmental impact.

Complex

Minerals
＋
Flocculant

Through Shock

1.1
～
1.3

10～11
Alkaline

Mineral system
＋
TAC Through

The two liquids are mixed at the tip of the cutting edge and used as a highly viscous additive which can withstand water dilution. Can also be used as a surplus filler.

Minerals
＋
Plasticity modifier

Clay Shock

1.2
～
1.3

10～11
Alkaline

Mineral
（TAC-β,βⅡ）
＋
TAC-3G
Plasticity modifier

Mix two liquids at the cutting tip to make plasticized clay. Form a plug zone with excellent shear resistance strength. Successful in the prevention of the eruption of water from earth which is rich in ground water.