Product Data Sheet Show all documents

PAREX® Railfast Concrete Summer

R4 Classification, Deep Section, Rapid Settting, Low Dust, Flowable Repair Concrete

One-component, cementitious, rapid setting, deep section, volumetrically stable, low dust, flowable repair concrete specifically designed for the rail industry where a rapid return to service is critical. Also available in Winter grade, for a range of temperature applications. 

  • Low dust (>70% reduction compared with equivalent conventional products).
  • Available in 25kg bags and user friendly 20kg bags. 
  • Flowable concrete ensuring ease of use. 
  • Rapid setting, allowing a fast return to service. 
  • Chloride 'free' (<0.01%), so can be safely placed in contact with steel. 
  • High early strength gain.
  • 20 to 650mm application thickness.
  • No special curing required.
  • Reaction to fire EuroClass A1 (non-combustible). 
  • Contains recycled products for improved sustainability. 
Product Data Sheet Show all documents

Usage

  • High early strength grade (HES) track concreting.
  • Construction of rail sleeper support pads.
  • High strength support sections for steel and concrete superstructures.
  • Concrete support of pit blocks.
  • Reinstatement of deteriorated pavement areas. 
  • Constructing new pavement areas. 
  • Structural support requirements. 
  • Other concreting works requiring rapid return to service (e.g. roads and runways). 
 

Advantages

  • Low dust (>70% reduction compared with equivalent conventional products).
  • Available in 25kg bags and user friendly 20kg bags. 
  • Flowable concrete ensuring ease of use. 
  • Rapid setting, allowing a fast return to service. 
  • Chloride 'free' (<0.01%), so can be safely placed in contact with steel. 
  • High early strength gain.
  • 20 to 650mm application thickness.
  • No special curing required.
  • Reaction to fire EuroClass A1 (non-combustible). 
  • Contains recycled products for improved sustainability. 

Packaging

20kg and 25kg bags

Colour

Grey powder

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Tested in accordance with the appropriate parts of the following standards: EN 12390, EN 12190, EN 13412, EN 1015 and EN 1542. Complies with the Classification R4 according to EN 1504-3 and is a structural repair CC mortar (based on hydraulic cement).
Product Information

Chemical Base

Cement, selected fillers and aggregates, special additives.

Shelf Life

6 months

 

Storage Conditions

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

Maximum Grain Size

6.0 mm 

Density

~2300 kg/m3*

(EN 12390-7)

* Hardened density

Soluble Chloride Ion Content

<0.01%

(EN 1015-17)
Technical Information

Compressive Strength

1 Hour

~20 N/mm2*

2 Hours

~24 N/mm2

24 Hours~40 N/mm2
7 Days~50 N/mm2

28 Days

~65 N/mm2

* When cured in polystyrene moulds. 

All tests completed in a controlled laboratory environment at 20oC.

      

35 Days*

>85 N/mm2

* Cured underwater for 28 days and then conditioned in air for a further 7 days, both at 20oC.

Modulus of Elasticity in Compression

>35 GPa at 28 days

(EN 13412)

Tensile adhesion strength

>2.0 N/mm2

(EN 1542)

Reaction to Fire

EuroClass A1

Application

Application Information

Mixing Ratio

1.8 litres of water for 20kg of powder.

2.25 litres of water for 25kg of powder. 

Layer Thickness

20 mm minimum / 650 mm maximum

Product Temperature

+15oC minimum / +35oC maximum

Ambient Air Temperature

+15oC minimum / +35oC maximum

Substrate Temperature

+15oC minimum / +35oC maximum

Pot Life

~13 minutes from the start of mixing*

* In controlled laboratory conditions where powder, water and ambient temperatures are 20oC. Warmer temperatures will accelerate product; colder temperatures will retard product.

Initial set time

~15 minutes*

* In controlled laboratory conditions where powder, water and ambient temperatures are 20oC. Warmer temperatures will accelerate product; colder temperatures will retard product.

Final set time

~18 minutes*

* In controlled laboratory conditions where powder, water and ambient temperatures are 20oC. Warmer temperatures will accelerate product; colder temperatures will retard product.

Application Time

The product should be placed within 10 minutes when fully mixed.

Note: Warmer temperatures will accelerate product; colder temperatures will retard product.
Consumption

Yield

20kg of powder yields ~9.5 litres of finished product. 

25kg of powder yields ~12 litres of finished product. 
Application steps

MIXING

Mixing should be undertaken using a pre-calibrated water measure and a purpose designed, handheld paddle mixer such as Refina, a pan type mixer such as CreteAngle or Rojo, or a tipping type mixer such as a

 

Portamix Mega Hippo. Mix PAREX® Railfast Concrete Summer in close proximity to the point of application. Measure the appropriate amount of clean potable water and add into the a clean mixing vessel. PAREX® Railfast Concrete Summer should be added slowly whilst continuously mixing. Mix thoroughly for at least 90 seconds to produce a pourable, self-compacting concrete. Once setting of the concrete has commenced, re-tampering or further mixing should not be attempted.

APPLICATION

Mixed PAREX® Railfast Concrete Summer should be placed onto the dampened prepared surface as soon as mixing is complete. Once placed, fully compact the concrete to obtain maximum strength development. The bed thickness applied in a single application should be between 20mm and 650mm.

CURING TREATMENT

No special curing is required at temperatures between +15°C and +35°C.

CLEANING OF TOOLS

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

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