Construction World March 2016

CONSTRUCTION WORLD

MARCH

2016

transportation as well as its simple installation:

“It was easy to use: we used pruning scissors

to cut it, and cable ties to bind overlaps together”;

it’s not heavy at all so I was able to collect

120 m² from Kaytech in Jhb and roll it up and

carry it on my bakkie with ease” said a represen-

tative from Bold Green.

TriAx provides radial stiffness thus producing

a truly multi-directional product with near

isotropic properties. The use of TriAx on this

project saved both time and money, since any

alternative option would have necessitated a far

deeper excavation of material.

Since TriAx geogrids have proven perfor-

mance in trafficking trials and can reduce base

thickness, increase bearing capacity, control

differential settlement and cap weak deposits,

developer, Atterbury Properties can rest assured

that these repairs at its Lynnwood Bridge Shop-

ping Mall are of the highest quality.

The trouble occurred above the storm-

water services which had been installed

five to six metres deep on the side of

the jockey slab. When DG Consulting Engi-

neers identified insufficient compaction of the

material above the stormwater services,

Kaytech’s tried and tested TriAx geogrid was the

immediate choice.

After removal of 300 mm of the faulty mate-

rial, contractor Bold Green, installed 120 m

of TriAx TX 160 subsequently covering it with

imported G5 material. The hexagonal struc-

ture of TriAx geogrid, coupled with increased

rib thickness and junction efficiency, provides

significantly improved aggregate confinement

and interlock, leading to improved structural

performance of the mechanically stabilised

load-bearing sub-base.

With no previous experience using TriAx, the

contractor was greatly impressed with its ease of

SIMPLIFYING GROUND

STABILISATION PROBLEM

Kaytech’s TriAx geogrid has been proven to functionally out-perform

the best performing bi-axial geogrids available, so it was no surprise

that this product was specified to solve a pavement subsidence

problem at the upmarket Lynnwood Bridge Shopping Centre in

Pretoria, Gauteng.

1. Excavating the site.

2. Compacting the base layer.

3. Laying TriAx with overlapping ends.

4. Compacting the surface layer.

5. Laying the paving layer.