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EPC Products Civil Engineering Testing Instruments Geotechnical Testing Rock & Soil Testing Laboratory Soil Testing Soil Mechanical Properties Dynamic Triaxial Testing? Quasi Dynamic Triaxial System
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Quasi Dynamic Triaxial System

Model:QDTAS

Use:based exclusively on the static GDSTAS triaxial system as used in commercial laboratories and research institutes.

Standard:ASTM D-3999, ASTM D-5311,GB/T50123-2019

The GDS Quasi Dynamic Triaxial Automated System is based exclusively on the static GDSTAS triaxial system as used in commercial laboratories and research institutes. The GDS 50kN load frame has the unique capability that it can run dynamically at frequencies up to 0.1Hz inherently, when combined with a dynamic logging system instead of the static logging system supplied with a GDSTAS as standard. The system is capable of cyclic displacement and cyclic load tests up to a frequency of 0.1Hz. The Quasi Dynamic System uniquely fills a gap in the market for medium speed cyclic testing, for half the cost of a typical, full capability, dynamic system.



Key Features:

Up to 0.1Hz cyclic testing under displacement or load control

 

Upgrade is possible from a GDSTAS static system (so long as it is using the v2 LF50 GDS load frame)

 

Realistic liquefaction testing on granular soils

 

Cost efficient

 

Benefits

 

Cyclic testing 30x faster than can be achieved with a standard static GDSTAS system for minimal additional cost.

 

Dynamic testing up to 0.1Hz, can be achieved for approximately 50% of the cost of a full dynamic system, or upgraded for 20% of the cost of a typical dynamic system.

 

Liquefaction testing on free-draining soils is known to not be rate dependent, therefore cyclic testing on these soils is possible in a standard static triaxial system (so long as it has cyclic control that GDSLAB can provide as standard). However, by running these tests at 0.1Hz rather than the typical one cycle every 5 minutes with a static system, a typical test 1000 cycles long that would take 3.5 days in a static system, would take less than 3 hours in the Quasi Dynamic system.

 

Half the cost of a typical dynamic system (even pneumatically controlled dynamic systems which have been shown to generally only work up to 0.1Hz ). For users who need to work up to 0.1Hz, this is a very economical system.




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