MasterLife SRAEfficient Shrinkage Reduction to Increase Concrete Durability

MasterLife SRA – Next Level of Shrinkage Reducing Admixtures

What is MasterLife SRA?

MasterBuildersSolutionsoffersabroadrangeoftailoredproducts covering all requirements regarding concrete durability and serviceability. MasterLife SRA are liquid shrinkage reducing admixtures which reduce both the autogenous and drying shrinkage of concrete

while maintaining its mechanical properties. This results incustomerbenefitswhichcomprisebotheconomicandtechnical advantages for the whole value chain of concrete industry. The admixtures do not contain any expansive material, but chemically reduce the internal capillary forces.

Product benefits at a glance MasterLife SRA 930 MasterLife SRA 833 MasterLife SRA 900

Target group Ready MixPrecast

Ready MixPrecast

Ready MixPrecast

Indication Economic Benchmark Premium

Shrinkage reduction ** *** ****

Cement compatibility *** *** ***

Strength retention *** *** ***

Retardation tendancy ** *** ***

Efficiency ** *** ****

CE marking yes upon request

Further aspects very low emission of VOC (reaching highest class A+ acc. to EN ISO 16000-9:2006 in combination with French decree 321/2011)

* = mild ** = good *** = very good **** = excellent

MasterLife SRAEfficientShrinkageReductiontoIncreaseConcreteDurability

Overview on shrinkage characteristics

Shrinkage describes the external changes in the volume of concrete (contraction) which are independent of the loading and caused by changes in the water regime and the chemical reaction (hydration) of the concrete. Shrinkage can be separated into the four types: plastic shrinkage, autogenous

shrinkage, drying shrinkage and carbonation shrinkage (usually negligible for construction concrete). Due to shrinkage, concrete may exhibit a severe crack development which favours the ingress of harmful substances, potentially leading to a decreased durability.

Plastic Shrinkage Autogenous shrinkage Drying shrinkage

Defi nitions

Mainly infl uenced by

Measures to compete

water loss on concrete surface

Relative humidity Wind conditions Temperature Setting behaviour (retarder, low

cement content, SCM)

MasterKuresurface treatment

MasterFiber 012syntheticmicrofibers

w/c ratio < 0,40 Cement type Cement content Stiffnessofaggregates

w/cratio≥0,40 Cement type Concrete mix design Ambient conditions Concrete member size

self-desiccation due to cement hydration environmental water loss due to drying of concrete

MasterLife SRA 150expansion agent

MasterLife SRAorganic shrinkage reducing admixtures recommended dosage: 1 – 2,5 % bwc

Shrinkage of Concrete – A Complex Story

MasterLife SRAEfficientShrinkageReductiontoIncreaseConcreteDurability

Thehighlyefficientshrinkagereducingadmixturesreducethe autogenous and drying shrinkage already at usual dosages of 1% by weight of cement (bwc). They are beneficialforready-mixproducers,precastindustryand/or general contractors, which intend to reduce the

life cycle costs of a construction. Reduced crack widths lead towards a higher durability and an increased joint spacing in slabs may help saving further costs, while a high cement compatibility and excellent strength retention properties guarantee practical application possibilities.

Slabs with width of 25 cm exposed to ambient climate conditions

Contact us!For recommendations regarding compatibility with other chemicals or building materials, please consult your local Master Builders Solutions Technical Advisor.

Next level MasterLife SRA: Enhanced performance all along the line

Experimental results with cement mortars (w/c ratio = 0.35)

Autogenous shrinkage ASTM C 1698 Drying shrinkage DIN 52450 Strength DIN EN 12390-3

Curling of thin self levelling screed (SLS)

0.0

0.0

-0.3

-0.6

-0.6

-1.2

1

1

2

2

3

3

4

4

0 20 40 60 80compressive strength (28d) / Nmm-2

SRA 930, 2.0 % bwc

SRA 833, 2.0 % bwc

SRA 900, 2.0% bwc

CEM I 52.5 R

deformation (t0 = 1d) / mm m-1

CEM II/A-LL 42.5 R+SRA 900,

2.0 % bwc CEM III 42.5 N+SRA 900,

2.0 % bwc

deformation (t0 = 1d) / mm m-1

Time (days)

Time (days)

0.0

0.0

-0.6

-0.6

-1.2

-1.2

0

0

7

7

14

14

21

21

drying shrinkage (t0 = 1d) / mm m-1

drying shrinkage (t0 = 1d) / mm m-1

Time (days)

Time (days)

Analogous dependencies were found for further cement class/ SRA combinations and results areavailableuponspecificproject request!

CEM I 52.5 R+SRA 900,

2.0 % bwc+SRA 833,

2.0 % bwc+SRA 930,

2.0 % bwc

CEM II/A-LL 42.5 R+SRA 900,

2.0 % bwc CEM III 42.5 N+SRA 900,

2.0 % bwc

CEM I 52.5 R+SRA 900,

2.0 % bwc +SRA 833,

2.0 % bwc+SRA 930,

2.0 % bwc

Curling / mm

0 5 10 15 20 25

0

1

2

3

4

5

Time (days)

CEM II/A-LL 42.5 R 330 kgAggregates 0 – 8 mm 1572 kgw/c ratio 0.49Water reducer 2 % bwcMasterLife SRA 900 1 % bwc

1 % MasterLife SRA 900 bwcReference w/o MasterLife SRA

4 cm

l = 1,5 m

curling

distance sensor

Proof of Performance – See the Diff erence

Our comprehensive portfolio

Concrete admixtures Cement additives Chemical solutions for underground construction Waterproofingsolutions Sealants Concrete repair and protection solutions Performance grouts Wind turbine grouts Performanceflooringsolutions

Master Builders Solutions

The Master Builders Solutions brand brings all of our expertise together to create chemical solutions for new construction, maintenance, repair and renovation of structures. Master Builders Solutions is built on the experience gained from more than a century in the construction industry. The know-how and experience of a global community of construction experts form the core of Master Builders Solutions.

We combine the right elements from our portfolio to solve yourspecificconstructionchallenges.Wecollaborateacrossareas of expertise and regions and draw on the experience gained from countless construction projects worldwide. We leverage global technologies, as well as our in-depth knowledge of local building needs, to develop innovations that help make you more successful and drive sustainable construction.

The comprehensive portfolio under the Master Builders Solutions brand encompasses concrete admixtures, cement additives, solutions for underground construction, waterproofingsolutions,sealants,concreterepair&protectionsolutions,performancegrouts,performanceflooringsolutionsandsolutionsforon-andoffshorewindenergy.

MasterAirComplete solutions for air entrained concrete

MasterBraceSolutions for concrete strengthening

MasterCastSolutions for the manufactured concrete product industry

MasterCemSolutions for cement manufacture

MasterEaseLow viscosity for high performance concrete

MasterEmacoSolutions for concrete repair

MasterFinishSolutions for formwork treatment and surface improvement

MasterFlow Solutions for precision grouting

MasterFiber Comprehensivesolutionsforfiberreinforced concrete

MasterGleniumSolutions for high performance concrete

MasterInjectSolutions for concrete injection

MasterKureSolutions for concrete curing

MasterLifeSolutions for enhanced durability

MasterMatrixAdvanced rheology control for concrete

MasterPel Solutions for hydrophobization, anti-efflorescenceand surface protection

MasterPolyheedSolutions for mid-range concrete

MasterPozzolith Solutions for water-reduced concrete

MasterProtectSolutions for concrete protection

MasterRheobuildSolutions for high strength concrete

MasterRocSolutions for underground construction

MasterSealSolutionsforwaterproofing and sealing

MasterSet Solutions for set control

MasterSphere Solutions for guaranteed freeze-thaw resistance

MasterSuna Solutions for sand and gravel in concrete

MasterSureSolutions for extraordinary workability retention

MasterTop Solutions for industrial and commercialfloors

Master X-SeedAdvanced accelerator solutions for concrete

UcreteFlooring solutions for harsh environments

QUANTIFIED SUSTAINABLE BENEFITS

ADVANCED CHEMISTRY BY MASTER BUILDERS SOLUTIONS

Let the numbers do the talking:Wehaveportrayedsomeofourmosteco-efficientproduct solutionsforconcreteandprecastproduction,construction,civilengineering,andflooring.

sustainability.master-builders-solutions.com

Master Builders Solutionsfor the Construction Industry

The data contained in this publication are based on our current knowledge and experience. They do not constitute the agreed contractual quality of the product and, in view of the many factors thatmayaffectprocessingandapplicationofourproducts,donotrelieveprocessorsfromcarryingouttheirowninvestigationsandtests.Theagreedcontractualqualityoftheproductatthetimeoftransferofriskisbasedsolelyonthedatainthespecificationdatasheet.Anydescriptions,drawings,photographs,data,proportions,weights,etc.giveninthispublicationmaychangewithoutprior information. It is the responsibility of the recipient of our product to ensure that any proprietary rights and existing laws and legislation are observed (01/2021).

® = registered trademark of MBCC Group companies in many countries MBS-01-2021-AS-0009-EN

Master Builders Solutions UK LtdSwinton Hall Road, Swinton,Manchester, M27 4EUT +44 161 727 6300constructionchemicalsinfo@mbcc-group.comwww.master-builders-solutions.com