Previous Page  34 / 54 Next Page
Information
Show Menu
Previous Page 34 / 54 Next Page
Page Background

Contractors World International Vol 7 No 5

34

It is easy to apply using a screed box which ensures

a strong thermal bond to substrates and makes it an

ideal permanent solution for high stress and highly traf-

ficked applications. The dry material is easier to handle

than bituminous products, with no paper bags needing

to be stripped and therefore less waste produced.

TexBand Solo rapidly repairs cracks, seams and joints

up to 40 mm wide in all asphaltic road surfaces and is

sufficiently durable for use on highly stressed surfaces

such as bends and roundabouts. It incorporates grey

granite aggregate with a polished stone value (PSV) of

62+ to improve safety by optimising initial and long term

skid resistance.

Hitex International

Watertight Case For Revamped

Shopping Centre

Currently undergoing a facelift and major

expansion, is the redevelopment of

Oxford’s Westgate Shopping Centre

Located in the heart of the historic

city of Oxford, the existing shopping cen-

tre is being transformed by main con-

tractor Laing O’Rourke, with the new

expanded 14 acre development set to

include more than 100 new stores, 25

restaurants and cafes, a new cinema and

rooftop terrace, and a 1,000 space base-

ment car park.

With the site located next to a river,

engineers Waterman Group required a

complete tanking system for the base-

ment areas that could prevent lateral

water movement.

In order to seal the basement car park

slab and the reinforced concrete walls,

the specification included more than

35,000 m² of the Sikaproof A08 and A12

system, a totally new concept in mem-

brane barrier design to deliver outstand-

ing levels of watertightness to the lower

floors.

The membrane surface of the new

product is embossed with a grid pattern,

which contains a sealant, and is topped

by a thin layer of fleece which forms a

mechanical bond to the concrete when

it dries.

The grid pattern is also unique. It offers additional

protection, due to the integrated sealant, which bonds

tightly with the surface of the concrete, forming mini

watertight compartments.

Therefore, even if the membrane is damaged or

pierced, moisture or pressured water cannot spread

between the membrane and the concrete structure as

it is contained within the small damaged grid square.

To complete the system, construction joints were

sealed with the SikaSwell jointing system, which consists

of joint sealing profiles that expand on contact with

water to seal any voids between adjoining concrete slabs.

Designed by architects, Chapman Taylor, Construction

is now taking place across the whole of the Westgate

site.

To the southwest of the site, the construction of the

two storey basement car park is continuing with the

upper floor levels of the new John Lewis department

store clearly visible.

The department store is one of the 5 individually

designed buildings connected by a series of public spac-

es, arcades and pedestrian bridges which sit under ele-

gant glass and steel roofs creating a naturally ventilated

light and open space.

The Westgate Oxford shopping centre scheme is set

for completion in the autumn of 2017

Sika