Overview

Sephaku 42.5R is an early strength cement for work that cannot wait

Rated ‘R’ for rapid early strength development, so formwork comes off sooner and the next stage of the build starts earlier.

Sephaku

42.5R

Strength class
42.5R
Cement type
CEM II/A-V
Standard
SANS 50197-1:2013
Packaging
50 kg bag & bulk

Specifications

Sephaku 42R is a type CEM II/A-V 42,5R early strength cement and is manufactured to fully conform to the requirements of strength class 42,5R in accordance with the South African National Standard SANS 50197-1:2013.

Sephaku 42R is rated ‘R’ in terms of early rapid strength development, which makes it ideally suited where faster demoulding or striking/stripping of formwork is beneficial. Portland-fly ash cement concretes, designed for the same strength as Portland cement concrete, will continue to gain additional strength to 90 days and beyond, provided adequate curing is given to the concrete.

Benefits

  • Ideal for all types of building and civil work.
  • For use in the manufacture of concrete products.
  • Suitable for ready-mix and site-batched concrete, mortar and screeds.
  • Exhibits early strength which improves stripping time.
  • Reduced water demand makes concrete easier to flow and pump, resulting in improved surface finish.
Application

One cement, a wide range of applications

High strength concrete

Improved water tightness, columns, slabs and heavy-duty industrial floors.
25 – 30 MPa
  • x 1 – Cement
  • x 3 – Sand
  • x 3 – Stone
  • x 6.5 – Bags per m³

Medium strength concrete

Paths, driveways and light-duty floors.
20 – 25 MPa
  • x 1 – Cement
  • x 3.5 – Sand
  • x 3.5 – Stone
  • x 6 – Bags per m³

Low strength concrete

Foundations, footings, ‘home’ concrete, e.g. domestic flooring, steps, paths and fencing.
10 – 15 MPa
  • x 1 – Cement
  • x 4.5 – Sand
  • x 4.5 – Stone
  • x 5 – Bags per m³

Mortar (general purpose)

Bricklaying and plastering.
5 MPa
  • x 1 – Cement
  • x 6 – Sand
  • x 6 – Bags per m³

Dry, lean mixes

Brick and block manufacture.
–
  • x 1 – Cement
  • x 9 – Sand
  • x 5 – Bags per m³
Other products

Explore our other cements

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Cement name
32.5R
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  • General purpose
  • Home building
Cement name
42.5N
Best for
  • Versatile projects
  • Commercial use
Cement name
52.5N
Best for
  • High performance
  • Structural work