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Precast Concrete Block Paving information

Concrete Block Paving definition:
Precast Concrete Block Paving:
Interlocking Cement Concrete Paver Block. Block paving also known as brick paving is a commonly used decorative method of creating a pavement or hard standing. The main benefit of bricks over other materials is that individual bricks can later be lifted up and replaced.
Block - SANS 1058
Paving block with all overall plan dimensions being less than 295 mm manufactured in concrete, and used in the construction of paved surfaces.


Information items for precast concrete Block Paving:

Technical Note for Steep Slopes

The construction of roads on steep slopes poses particularly interesting challenges for road engineers. The horizontal (inclined) forces exerted on the road surface are severely increased due to traffic accelerating (uphill), braking (downhill) or turning. These horizontal forces cause distress in most conventional pavements, resulting in rutting and poor riding quality.; Experience has shown that concrete block paving (CBP) performs well under such severe conditions. Although CBP performs well on steep slopes, there are certain considerations that must be considered during the design and construction of the pavement: Click here to read more

17 September 2019


Colour variations in: CMU, CBP and Concrete roof tiles.

The understanding of colour, hues and reflection of light is complex and a field of specialised study. This brochure takes a brief look at colour and colour variance in terms of:

  • The South African National Standard
  • Factors influencing colour
  • Realistic expectations
  • Avoiding disappointment
  • Recommendations

Click here to read more

23 September 2021

Correlation between Compressive Strength and Tensile Splitting Strength

What is the correlation between compressive strength and tensile splitting strength in terms of concrete paving blocks as referred to in SANS 1058:2012? One would imagine that if compressive strength of the concrete paper would increase the tensile splitting strength would also increase. This is however not true. Click here to read more

17 September 2019

Concrete Block Paving: Efflorescence

The possibility exists that after a few weeks or months pass, a white haze may appear on the surface of the pavers. This white haze is known as efflorescence. It may appear randomly or in certain areas and will be more pronounced on colored pavers. The white haze might give the impression that the color is fading.Click here to read more

10 October 2019 2019

Concrete Block Paving: Drainage

Concrete Block paving (CBP) differs from other forms of surfacing in that it comprises small segments and therefore is crisscrossed by a network of close spaced joints filled with sand. This means CBP is permeable and drainage of the surface and underlying layers is important. There is limited full scale testing worldwide but from a study conducted by Dr Brian Shackel of the University of New South Wales, Australia, the following conclusions were drawn:

  • Between 30% to 35% of rainfall will penetrate newly laid, untrafficked, and unsealed block pavements.
  • Increase in pavement crossfall will increase surface runoff. (Recommended min. slopes of 2%).
  • The permeability of the joints can be reduced by up to 50% with an application of a water based acrylic sealer. Similarly, infiltration can be inhibited by using 10% of lime or 6% bentonite to the jointing sand. Click here to read more

10 October 2019


CMA NPC & CMACS Partnerships



Aggregate Sand Producers SA