Product Data Sheet Show all documents
Parex Fine Bedding Concrete (FBC)

Parex Fine Bedding Concrete (FBC)

BS 7533 Compliant, Hard Landscaping, Fine Bedding Mortar for the Laying of Natural Stone Slabs, Pavers, Setts, etc. 

Parex Fine Bedding Concrete (FBC) is a cementitious, polymer reinforced, single-component mortar for the placing and bedding of paving units. The mix design includes powerful plasticising agents which produce a workable mortar, suitable for bedding slabs, pavers and setts. The low water requirement enables the placed mortar to rapidly develop the compressive strength required to support the placed paving elements. Parex Fine Bedding Concrete (FBC) is an integral member of the Parex / Sika Streetscape Range, and is designed specifically to conform to the relevant parts of BS 7533, ensuring performance and longevity. It should be used in conjunction with Parex Bond Plus Mortar to ensure sufficient bond strengths are achieved; and Parex Granatech or Parex SettPoint, to provide a fully compliant bedding and jointing system for hard landscaping projects.  

  • Pre-batched for simplicity: only requires the measured addition of water. 
  • Cost-effective.  
  • Ready for on-site mixing. 
  • Formulated for ease of use and to meet (and exceed in some respects) the requirements of BS 7533-101: Code of practice for the structural design of pavements using modular paving units. 
  • Integral part of the Streetscape Range. 
  • Available in 25 kg and bulk bags. 
  • Good freeze-thaw stability. 
  • Resistant to oils and many chemical environments. 
  • Wide range of application thicknesses achievable (30-75 mm). 
  • Euroclass A1 fire rating.
Product Data Sheet Show all documents

Usage

  • Bedding of paving units for vehicular traffic.
  • Bedding of slabs, pavers and setts for all pedestrianised zones.

Advantages

  • Pre-batched for simplicity: only requires the measured addition of water. 
  • Cost-effective.  
  • Ready for on-site mixing. 
  • Formulated for ease of use and to meet (and exceed in some respects) the requirements of BS 7533-101: Code of practice for the structural design of pavements using modular paving units. 
  • Integral part of the Streetscape Range. 
  • Available in 25 kg and bulk bags. 
  • Good freeze-thaw stability. 
  • Resistant to oils and many chemical environments. 
  • Wide range of application thicknesses achievable (30-75 mm). 
  • Euroclass A1 fire rating.

Packaging

25 kg and 1000 kg bulk bags

Colour

Grey powder

Product Details

Product Information

Chemical Base

Portland cement and special polymers and plasticisers

Shelf Life

6 months

Storage Conditions

Bagged Parex Fine Bedding Concrete (FBC) will have a shelf life of 6 months when kept in dry conditions at a temperature of +5°C to +35°C. Storage at higher temperatures or high humidity may reduce the shelf life.
Bulk bags should be used as soon as possible after delivery. Bags not to be used immediately should be stored on pallets and under cover.

Density

~2000 kg/m3

 
System information

System Structure

Parex Fine Bedding Concrete (FBC) is part of the Parex / Sika Streetscape System complying with the relevant parts of BS 7533 and comprising of:

Bedding Mortar:

Parex Fine Bedding Concrete (FBC)

Priming Scrub Coat:

Parex Bond Plus Mortar

Pointing / Jointing Mortar:

Parex Granatech

Parex Granatech 40 Fine
 
Technical Information

Compressive Strength

3 days

~20 N/mm²

7 days

~30 N/mm²

28 days

~40 N/mm²

Typical mortar values at 20°C.

Modulus of Elasticity in Compression

~21,000 N/mm²

(BS EN 13412)

Determined after 28 days. 

Tensile adhesion strength

>2.0 N/mm²*

*Attained with Parex Bond Plus Mortar in accordance with BS EN 13892-8 after 28 days. 

The tensile adhesion / bond strength achieved is a function of the mortar used and the porosity / surface texture of the paving units. For vehicular trafficked areas, the inclusion of Parex Bond Plus Mortar is essential. 

Shrinkage

≤0.09 %

(BS EN 12617-4)

Determined in accordance with BS EN 12617-4:2002, Clause 6 after 56 days, with curing in accordance with BS EN 12617-4:2002, A.1.2. 

Water permeability

≥5x10-5 m/s 

(BS EN 12697-19)

Reaction to Fire

Euroclass A1

(BS EN 13501-1)

Application

Application Information

Mixing Ratio

The water requirement is 8 - 9% (or 2.0 - 2.25 litres of water) per 25kg bag.

Layer Thickness

30 mm minimum / 75 mm maximum

Ambient Air Temperature

+5°C minimum / +35°C maximum

Substrate Temperature

+5°C minimum / +35°C maximum

Pot Life

~45 minutes at 20°C
Consumption

Yield

Each 25 kg bag of Parex Fine Bedding Concrete (FBC) will yield approximately 13.5 litres of mixed material.
Application steps

SUBSTRATE PREPARATION

Contact surfaces must be sound, clean and provide a good mechanical key. Remove any loose material, laitance, plaster, paint and oily deposits.

MIXING

Mixing of bagged Parex Fine Bedding Concrete (FBC) requires a forced action mixer such as a Creteangle or Rojo. Pour the recommended amount of clean water into a suitable mixing vessel. Gradually add the powder and mix thoroughly until a homogeneous product is achieved. Once mixed, apply within the pot-life. Additional water should not be added to 'revive' the product past its pot-life.

APPLICATION

Apply the mixed Parex Fine Bedding Concrete (FBC) to the primed substrate before the priming coat has dried. Compact the Parex Fine Bedding Concrete (FBC) to ensure good contact with the
underlying primed surface. It is advisable to dip setts / cubes in water to clean them prior to priming. Prime the back / underside of the paving units being used and place the units onto the wet Parex Fine Bedding Concrete (FBC) and adjust the levels as required. Always ensure that the Parex Fine Bedding Concrete (FBC) layer is fully compacted.

 

Application thickness of the Fine Bedding Concrete should be in the range of 30mm to 75mm. In situations where thick layers are required to be built up, the surface of the lower layer should be left with a wood float finish and should be scored. Subsequent Parex Bond Plus Mortar and Parex Fine Bedding Concrete (FBC) layers may be applied as soon as the initial layer is firm enough not to distort under the new work.

CURING TREATMENT

In temperate ambient conditions, no special curing is required. In severe drying conditions of high temperatures and high wind, the paved surface should be sprayed with water to assist with temperature control of the paving surface and provide water for additional curing of the Parex Fine Bedding Concrete (FBC).

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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