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Shrinkage Limited Cement

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Shrinkage Limited Cement

Shrinkage Limited Cement is a Portland cement designed for use inapplications where there is a desire to minimise concrete drying shrinkage.

Lower concrete drying shrinkage minimises the potential for drying shrinkage cracks,

improving the aesthetics and the structural integrity of concrete.

The level of consistency and versatility of Shrinkage Limited Cement makes it an

ideal choice in virtually all forms of construction applications where strict drying

shrinkage specifications exist.

Shrinkage Limited Cement exceeds the requirements specified in Australian StandardAS 3972 for Type SL cement.

Benefits of Shrinkage Limited Cement

Assists in minimising drying shrinkage of concrete

High level of consistency and versatility

Compatible with most admixtures and supplementary cementitous materials

Product applications

Shrinkage Limited Cement should be specified when the performance of a structure

would benefit from reduced concrete drying shrinkage, with examples being:

Concrete pavements

Suspended and on-ground slabs

Bridges and overpasses

Pre and post-tension concrete elements

Shrinkage Limited Cement is a key component

in reducing drying shrinkage in bridges

Ideal in commercial buildings where low

shrinkage is required to control cracking Used in underpasses and flyovers.

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Shrinkage Limited Cement is designed foruse in applications where there is a desireto reduce concrete drying shrinkage.

The use of SL Cement does not guarantee low shrinkage or

crack free concrete. Concrete drying shrinkage is heavily

influenced by many factors such as aggregate type, water

cement ratio, admixtures, environmental conditions, etc.

Further advice should be sought on this issue.

Cement PropertiesThe following table details the relevant specified requirements

of AS3972 and the indicative valves achieved by Type SLCement.

CompatibilitiesType SL Cement is compatible with:

Admixtures that comply with AS 1478 Chemical

Admixtures for Concrete.

Fly ashes complying with AS 3582.1 Supplementary

Cementitious Materials for Use with Portland cement: Fly ash.

Ground granulated blast furnace slags complying with

AS3582.2 - Supplementary cementitious materials for

use with Portland cement: Slag - ground granulated

Iron blast-furnace.

Amorphous silica complying with AS3582.3 - Supplementary

cementitious materials for use with Portland cement:

Amorphous silica.

Other cements complying with AS3972 - Portland and

blended cements.

Caution: Shrinkage limited cement must not be mixed withhigh alumina cement as it may result in uncontrollable

expansion and setting times.

Mix Design

The proportioning of constituent materials in a concrete mix

is a complex matter which can be influenced by many factors,

therefore we recommend that trials be conducted to ascertain

optimum cement contents for specific classes of concrete.

We also refer you to AS1379 The specification and

manufacture of concrete and AS3600 Concrete structures

for further guidance.

Concrete PropertiesCompressive Strength Development

Compressive strength development of Portland cement is

affected by a number of factors such as water cement ratio,

admixtures, curing and environmental conditions. The

following graph depicts indicative compressive strength

development for Type SL Cement.

Effect of Excess Water Addition on Concrete

Compressive Strength

All testing conducted in accordance with the relevant AustralianStandard test methods, at a registered NATA laboratory.

Maturity

%o

f28daycompressivestrength

3 Days 7 Days 28 Days

100

80

60

40

20

0

Design Water +10 L/m3 +20 L/m3 +30 L/m3

24 MPa

20 MPa

16 MPa

12 MPa

8 MPa

4MPa

LossofStrength

Water

Property AS3972 LimitsIndicativeType SL

Setting TimeMin 45min 60-150 min

Max 6 hrs 2.0 - 3.5 hrs

Soundness Max 5 mm < 3mm

SO3 Max 3.50% < 2.9%

ISO MortarCompressive

Strength

3 Day (min) 30-39 MPa

7 Day (min) 35 MPa 43-52 MPa

28 Day (min) 45 MPa 54-62 MPa

Shrinkage(mortar) max 750S 500 - 700S

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Cement Australia Pty LimitedABN 99 001 085 561

12 Station AvenueDarra Queensland 4076Tel: 1300 CEMENT (1300 236 368)www.cementaustralia.com.au

Storage, Handling and SafetyThe 'shelf life' of Portland cement products is dependent on the storage conditions. It is recommended that Portland cement products be re-tested

prior to use if the age of the cement exceeds three months.

Portland cement products are highly alkaline materials and are significantly affected by exposure to water. Full Safety, Storage, Handling and Disposal

information is available in the specific product Material Safety Data Sheet available on www.cemaust.com.au

Product DisclaimerThe information contained in this sheet is for general guidance only and should not be relied upon in specific instances. Cement performance

results quoted are indicative as cement performance can be heavily influenced be a wide range of factors beyond our control. Users should

rely on professional advice according to their particular circumstances. To the extent permissible by law Cement Australia will not be liable for any

losses due to reliance on the information in this sheet or for losses due to the misuse of its products.

Workability

When using Type SL Cement the amount of water required

to achieve a specified level of concrete workability will be

comparable to concrete produced with a Type GP cement.

Curing

A minimum curing period of seven days is recommended for

all exposure classifications. Concrete should be maintained

in a continually moist condition wherever practicable. Water

sprays, wet sand or moisture retaining techniques, such as

clear polyethylene sheets or curing compounds are

recommended. Curing should begin upon the completion

of surface finishing or in accordance with manufacturers

instructions where proprietary curing compounds are used.

For normal class concrete, curing can produce a compressive

strength up to 100% greater than concrete not subjected to

curing. Water application or moisture retaining curing is more

effective for lower grades of concrete. Curing will also

beneficially affect other concrete properties including:

Reduction in the potential for plastic cracking.

Improvements in surface quality, durability and

impermeability.

Improvement in abrasion resistance.

Reduction in the carbonation rate.

For further informationPlease contact Cement Australias Customer

Support Services:

Tel: 1300 236 368

Fax: 1800 236 329

Email: 1300cement@cemaust.com.au

CA0626 SLC Revision 2 18/03/2011