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tuffbed 2-Pack High Performance Low Carbon Bedding Mortar

Steintec

High performance bedding mortar to BS 7533-7: 2010 Type A and Type B, with a low-carbon manufacturing profile.

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Description

A high performance bedding mortar, formulated for use as the laying course (bedding) for bound construction (rigid) pavements constructed in natural stone or concrete paving units subject to pedestrian through to heavy categories of trafficking.

Features and benefits:

  • Performance exceeds BS 7533 Type A and Type B bedding mortar requirements and in particular the requirement to be permeable and frost resistant when cured.
  • The permeability of the bedding mortar helps to prevent moisture related issues, including frost damage, structural failure, efflorescence, picture framing and organic staining.
  • Low carbon footprint: This two-part product requires no pre-drying or pre-blending of the aggregate component, and because the binder is supplied separately, the need for energy intensive central processing is avoided. This reduces overall energy use and haulage. Mixing is carried out on site which also makes it economical and suitable to commercial and public realm projects.
  • Bedding depths of between 25–70 mm can be placed in a single layer. Greater depths are achieved by placing successive layers. Consult manufacturer for details.

Specification data
Product Reference

tuffbed 2-Pack High Performance Low Carbon Bedding Mortar

Mortar designation

Classification - BS 7533-7: 2010 C.2.1 and table C4 Type A and Type B compliant

Classification - BS 7533-7: 2010 C.2.1 and table C4 Type B compliant

Adhesive strength designation

2 N/mm² with tuffbond brush applied to underside of paving elements

2 N/mm² with tuffbond brush applied to underside of paving elements and to surface of concrete base or structural slab

Permeability designation

Horizontal permeability = 8.5 x 10^-4 m/s (to EN 12697-19)

Required where base is impermeable concrete or bituminous base.

Vertical permeability = 18.8 x 10^-4 m/s (to EN 12697-19)

Required where the base is permeable.

Standard product features

Technical characteristics:

  • Working temperature: 2–30°C.
  • Typical compressive strength: 14 days at 20°C: ~25 N/mm²; 28 days at 20°C: ~35 N/mm².
  • Adhesion strength: ~1 N/mm² (without tuffbond): ~2 N/mm² (with tuffbond).
  • Flexural strength: 7 N/mm².
  • Modulus of elasticity: 14 000–18 000 N/mm² (application-dependent).
  • Permeability (to EN 12697-19): 8.5 x 10^-4 m/s.

- In accordance with EN 13813: 2002:

  • Compressive strength: C35.
  • Flexural strength: F4 (4.5–7.0 N/mm²).
  • Reaction to fire: A1-fl.

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