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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