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A modified Polymer based fibre reinforced thin sprayed liner This product is used as a rock support to provide surface stabilisation between rock bolts. Technicrete TSL is water based and is supplied in an easy-to-use kit consisting of a special liquid. A blend of powder chemicals, and graded silica sand with polypropylene fibres.
One kit provides approximately 13.5 litres of mixed material.
|TSL EFNARC SPEC’S||WITS TEST RESULTS|
|> 0.25 MPa @ 24 hours||> 0.66 MPa @ 24 hours
14.0 MPa @ 28 days
|> 2 MPa @ 7 days||> 2.60 MPa @ 27 days
3.00 MPa @ 28 days
|Shear 1.0 MPa||2.0 MPa @ 28 days|
|1.0 MPa||3.0 MPa @ 28 days|
The contents of the kit are simply emptied into a suitable mixer / pump arrangement and sprayed onto the cleaned rock face to be supported. The spray is directed into any open joints etc for maximum penetration.
The equipment used is a simple mixer / pump arrangement having a positive displacement type pump. The delivery hose should be about seven metres for best effect. Compressed air is added at the nozzle to spray the fresh mix.
Cleaning of the equipment is easy by simply flushing thoroughly with water after the application is complete.
The freshly mixed TSL is sprayed under pressure directing the material into the open joints and fissures and covering all surfaces. The bonding properties of the TSL bind the rock faces inside the fissures to provide a more stabilised rock surface. This has the effect of minimising the unravelling of the rock mass.
The tensile properties of the TSL spanning across joints and cracks resist shear and direct tensile movement, thereby adding to back-pressure into the rock mass for added stabilisation.
In low stress environments the bonding and tensile strengths help to prevent block movements keeping the rock ‘beam’ intact.
Can be rapidly deployed in the underground environment as the equipment is easily manhandled in confined areas.