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

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Clay-Shock Injection

“Non-curing filler” – Clay Shock is being used in more applications day by day.

What is Clay Shock?

Clay Shock is a highly viscous filler lubricant of about 300 to 500dPa. It is produced by mixing Clay sand,TAC-β,(βⅡ) solution and waterglass TAC-3G. Clay Shock incorporates the following features:

*It has fluidity so works very well with respect to overcut under pressurized injection.
*High viscosity, high enough clogging effect even with large clearance ground, with high stability of over the excavated area.
*Even when filling an actively excavated area, the backfilled Clay Shock material does not affect the shield machine.
*Adhesive strength and shear resistant force are less than ground, creating an effect of reducing the frictional resistance of the outer periphery of the shield machine.

Materials used.

(Clay Shock compound example) Per 1.05㎥

TAC-β Formulation Used
Liquid A(1㎥ ) Liquid B
Clay Sand Water Sodium Silicate
520kg(495kg) 800L(762L) 50L(48L)
TAC-βⅡFormulation Used
Liquid A(1㎥ ) Liquid B
Clay Sand Water Sodium Silicate
384kg(366kg) 853L(812L) 50L(48L)

Note: Bracketed value “( )” indicates amount per 1m3 of Clay Shock

●A+B solutions mixed
●Clay-Shock is produced
●Loading status for 1kg
Viscosity of Clay Shock (viscosity of clear water using viscotester: 1cp = 0.01 dPa・s
Example of Clay Shock viscosity measurement (using TAC-β)
Viscosity Unit (dPa・s)
Example of Clay Shock viscosity measurement (using TAC-βII)
Viscosity Unit (dPa・s)

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