Product Data Sheet Show all documents

Parex Thixotropic Joint Filler (TJF)

Stay-in-place pumped mortar specially formulated for filling gaps and voids in precast concrete construction without the need for shuttering.

A pumped mortar purpose-designed for filling joints and gaps in precast concrete units without the need for formwork. The thixotropic qualities of the mortar and non-shrink additives allow it to stay in place without slumping and to provide a complete high strength bond between sections. Before forming an initial set, it can be tooled off to provide a complete and smooth joint. The material can be used for placing in horizontal and vertical gaps of 5mm to 100mm where a cementitious mortar infill is required and flow grouting is inappropriate. It requires only the addition of water on site and is mixed using a drill and paddle followed by hand or mechanical pump placement. For larger jobs mixer pumps can be used. Parex Thixotropic Joint Filler (TJF) is chloride-free and can be safely used in contact with steel reinforcement.  

  • Shrinkage compensated
  • High strength
  • Thixotropic
  • Low sag nature
Ask for a quote
Product Data Sheet Show all documents

Usage

  • Structural support between and beneath precast concrete elements 
  • Permanent insitu shuttering in joints between precast concrete elements which will be post grouted
  • Rapid placement using Duo-Pump systems.

Advantages

  • Shrinkage compensated
  • High strength
  • Thixotropic
  • Low sag nature

Packaging

25kg bags

Colour

Grey powder

Product Details

Product Information

Chemical Base

Portland cement based powder mix including special thixotropic and shrinkage compensating components.

Shelf Life

6 Months

Storage Conditions

Store properly in dry conditions in undamaged and unopened original sealed packaging

Density

~2100 kg/m3
Technical Information

Compressive Strength

24 hours

35 N/mm2

7 Days

60 N/mm2

28 Days

70 N/mm2

Application

Application Information

Mixing Ratio

4.5 Litres per 25 kg bag

Layer Thickness

5mm min / 100mm max

Ambient Air Temperature

+5°C min / +35°C max

Substrate Temperature

+5°C min / +35°C max

Initial set time

~210 minutes @ 20°C

Final set time

~240 minutes @ 20°C
Consumption

Yield

Each 25kg bag of TJF will yield approximately 13.5 litres of mixed material.
Application steps

MIXING

The water requirement to produce the mortar is 4.5 to 5.0 litres of water
Mixing Prior to Pumping
Pour the required quantity of water into a suitable mixing vessel. Slowly add the powder to the water whilst continuously mixing. Mechanical mixing is recommended. Suitable mixers include a slow speed high torque drill with a Mortar Stirrer or a forced action mixer such as Creteangle.
"Duo Mix” Mixing
Mixer pumps, such as the Duo Mix will mix the Parex Thixotropic Joint Filler (TJF) on the pump unit prior to pumping into place. Load the Parex Thixotropic Joint Filler (TJF) into the mixer-pump in accordance with the equipment manufacturer’s instructions.

 

APPLICATION

Hand mixed mortar should be loaded into a suitable pump unit and placed in accordance with the pump supplier’s instructions. Duo Mix units will allow the mortar to be mixed and placed continuously from the single unit. Pumping rates of some 12 to 15 litres per minute have been found to be satisfactory. At these rates the build up of hydrostatic pressure in vertical joints will not cause the grout to flow from openings in the jointing area.
Ensure complete filling of the gap and then finish the exposed surface with a dampened steel trowel.

CURING TREATMENT

Parex Thixotropic Joint Filler (TJF) may be applied at temperatures between 5°C and 35°C. In moderate ambient conditions no special curing is necessary. Under hot and high drying conditions curing of exposed surfaces should be undertaken in accordance with good concrete practice.

CLEANING OF TOOLS

Clean all tools and application equipment with water immediately after use. Hardened/cured material can only be mechanically removed.

 

Documents