Concrete

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Concrete

Lytag® lightweight aggregate is up to 50% lighter than normal weight aggregate

• Can be pumped to any height
• Can achieve a high quality finish

Much of London's dramatic new skyline is built with Lytag

25 - 40% LIGHTER
CONCRETE

The Heron Tower was built with Lytag®

Weight

Using Lytag® coarse aggregates reduces the weight of structural concrete by around 25% compared with natural aggregate concrete. Including Lytag® fine aggregate allows further weight reductions of up to 40%. 

Advantages: Less concrete and steel used; dead load of structure reduced; less foundations needed.

Benefits: Significant cost savings.

AS STRONG
AS NORMAL
WEIGHT CONCRETE

20 Fenchurch Street (aka the Walkie Talkie Building) was built with Lytag®

Structural Performance

Lytag® lightweight aggregate concrete can provide the same level of structural performance as normal weight concrete so it can be used in exactly the same way. 

A compressive strength of up to 65N can be achieved.

Advantages: Meets all British & European Standards at a fraction of the weight. Including a 16% improvement on long-term deflection over normal weight concrete.

Benefits: Same performance as natural aggregate concrete; reduced costs; greater design flexibility. 

 

SUBSTANTIAL SAVINGS

Less weight makes possible savings in steel, piling, foundations and transportation

Savings

Because Lytag® concrete is significantly lighter with no loss in strength over natural aggregate concrete, it reduces the dead load of the building. Substantial savings are made in concrete, reinforcement, foundations, CO2e, haulage, time, and associated construction costs.
See the independent study.

Advantages:
Savings of up to 48% in foundations.
10mm saving on the depth of floor slabs
10% less CO2e 

Benefits: A cheaper, quicker and greener building.

CARRY TWICE THE
VOLUME PER TRUCK

Haulage

Savings can be made in many elements of haulage, including transporting raw Lytag® in place of natural aggregate, and concrete and reinforcement deliveries.

See the independent study.

Advantages: Quicker and cheaper delivery.

Benefits: Savings in time and haulage costs; Significant savings in CO2e.

AS EASY TO PLACE AS NORMAL WEIGHT CONCRETE

Lightweight concrete being poured to the top of the Walkie Talkie

Installation

Placing and compaction is as easy as with normal weight concrete. Lytag® concrete can be pumped long distances and to great heights, as proven by its use in numerous recent structures such as the Shard and 20 Fenchurch St (the Walkie Talkie). Finishing processes used for normal concrete can easily be applied to Lytag® concrete.

Advantages: No specialist skills or tools needed. All possible concrete finishes can be achieved. High flow values achievable aiding speed of placement and workability

Benefits: No extra cost for normal installations.

NEEDS LESS MOVEMENT JOINTS

Thermal expansion

Using LYTAG® reduces the coefficient of thermal expansion by 33% over normal weight concrete. The value for Lytag® can be taken as 7x10-6 / ºC.

Advantages: Less movement joints are required. Reduction in risk of thermal cracking

Benefits: Cost reductions; design benefits.

100% IMPROVEMENT IN
THERMAL CONDUCTIVITY

The Shard was built with Lytag® lightweight aggregate

Insulation

Using Lytag® not only reduces the density of your concrete but also improves the insulating properties with double the thermal performance of normal weight concrete. It meets all rating requirements.

Advantages: Reduced λ value leading to improved U value of elements within the structure. 

Benefits: More thermally efficient structures; reduction in cold bridging.

Fire Resistant

Lytag® pellets experience extreme temperatures during manufacture. As a result they are more stable at high temperatures, have a lower expansion coefficient, and a lower reduction in strength. This makes Lytag® ideal for fire resistant applications such as lift shafts and tunnels.

Advantages: Meet all ratings at a reduced cost.

Benefits: Increased overall fire safety of structures.

GREATER DESIGN OPPORTUNITIES

The Shard was built with Lytag®

Design

Lytag® allows architects and structural engineers to push the boundaries of design by including longer cantilevers, slimmer general sections, larger spans and fewer or smaller columns.

Advantages: Less constraints on design; larger floor spaces.

Benefits: More available space for the client to utilise; architects and engineers can gain a competitive advantage at the tender stage.

Structural concrete

Summary
 
Compared to normal weight concrete, Lytag® lightweight aggregate:
  • Is 25 - 40% lighter;
  • Is as strong;
  • Allows twice as much volume to be carried per truck;
  • Is as easy to place;
  • Has lower thermal expansion so less movement joints needed;
  • Gives 100% improvement in thermal conductivity;
  • Is more fire resistant;
  • Offers warmer, safer buildings, substantial savings and
  • Greater design opportunities

 

See the independent study.