concrete sustainable solutions more value less impact · concrete sustainable solutions concrete...
TRANSCRIPT
CONCRETESUSTAINABLE SOLUTIONSMORE VALUE LESS IMPACT
2 3CONCRETE
SUSTAINABLE SOLUTIONSCONCRETESUSTAINABLE SOLUTIONS
THE PUSH FOR SUSTAINABLE CONSTRUCTION is gaining momentum at an astounding rate. As sustainably designed "green" concrete becomes more a part of the everyday construction demand, we must all think of how we fit into this rapidly emerging picture.
Concrete is a vital part of today’s construction industry which demands solutions that consider both economical and environmental aspects. Concrete producers are continuously striving to achieve more efficient and environmentally-friendly production methods. Sika continues to offer cost-effective concepts for a more environmentally-friendly production of concrete.
Sika has over 100 years of research and experience in cementitious construction materials that allows it to offer concepts for sustainable green concrete. Special concrete admixtures ensure the production of easy to handle and environmentally-friendly high performance concretes for the modern construction industry.
BUILDING SOLUTIONS FOR A SUSTAINABLE FUTURE
Application
Natural Resources Raw Materials
Cradle to Gate
End-of-LifeWaste
Production
Cradle to GraveCradle to Grave
Use and Maintenance
4 5CONCRETE
SUSTAINABLE SOLUTIONSCONCRETESUSTAINABLE SOLUTIONS
’CRADLE TO GATE’
WHICH LIFE CYCLE PHASES ARE INCLUDED IN THESE SIKA LCA'S?
THE SIKA LIFE CYCLE APPROACH
ENERGY EFFICIENCYSika Concrete Admixtures and Systems which contribute to reduce the energy demand of the concrete mix design and its application.
RESOURCE EFFICIENCYSika Concrete Admixtures and Systems which contribute to reduce the resource demand of the concrete mix design.
Sika has identified trends that will change in our target markets the needs for concrete products. These selected challenges are:
CLIMATE PROTECTIONSika Concrete Admixtures and Systems which contribute to reduce the carbon emissions of the concrete mix design.
WATER EFFICIENCYSika Concrete Admixtures and Systems which contribute to reduce the water demand required to achieve the concrete quality and improve the durability of concrete.
Life Cycle Assessment (LCA) is a standardized method to assess and compare the inputs, outputs and potential environmental impacts of products and services over their life cycle. LCA's are increasingly recognised as the best way to evaluate the sustainability of products and systems.
WHAT IS LIFE CYCLE ASESSMENT AND WHY IS IT RELEVANT?
The data for the Sika LCA is based on public databases, such as those from Ecoinvent, the European Reference Life Cycle Database (ELCD) and Thinkstep-GaBi, plus the specific data from Sika production plants and products.
ON WHAT STANDARDS ARE SIKA LCA'S BASED?
Sika carries out LCA’s according to the ISO 14040 series and the Standard EN 15804. The impact assessment methodology used is CML 2001.
WHERE DOES THE SIKA LCA DATA COME FROM?
In a ’Cradle to Gate’ approach, the LCA investigates the potential environmental impact of a product from raw material extraction to finished production.
In a ’Cradle to Grave’ approach, the LCA investigates the potential environmental impact of a product from raw material extraction, production, application and use to final disposal at the end-of-life.
The LCA follows a "Cradle to Gate with option" approach, and its aim is to analyze the production of Concrete Admixtures and their application in concrete. The LCA model was reviewed by the leading independent research institute Swiss Federal Laboratories for Materials Science and Technology (EMPA).
’CRADLE TO GRAVE’
WHICH LIFE CYCLE PHASES ARE INCLUDED IN THE SIKA CONCRETE LCA'S?
HIGH DURABILLITY
MEETS ALL STANDARDS
IMPROVES THE FINISHING
MEETS ALL SUSTAINABILITY SCHEMES
LESS WATER
LESS ENERGY
LESS RESOURCES
LESS CO2 OMISSIONS
ENVIRONMENT
SAVE WATER
COST OPTIMISATION
USING ALL RESOURCES
IMPROVED PRODUCTION
USING RECYCLED AGGREGATE
COMMUNITY
CONCRETE SUPPLIER
BENEFITS OF SUSTAINABLY DESIGNED "GREEN" CONCRETE
6CONCRETESUSTAINABLE SOLUTIONS
3Cumulative Energy Demand (CED) [MJ/m3 concrete]
0 500 1000 1500 2000 2500
Marine Concrete
Shrinkage reduced Concrete
Winter Concrete
Lining Concrete
Sprayed Concrete
High early strength…
Frost resistant Concrete
Self compacting Concrete
Pumped Concrete
Waterproof Concrete
Plain Concrete
Cement
ConcreteAdmixtures
Other Binders/Water/ Gravel/Sand
ENVIRONMENTAL IMPACTS OF DIFFERENT CONCRETE TYPES
0 1 2 3 4 5 6 7 8
Marine Concrete
Shrinkage reduced Concrete
Winter Concrete
Lining Concrete
Sprayed Concrete
High early strength Concrete
Frost resistant Concrete
Self compacting Concrete
Pumped Concrete
Waterproof Concrete
Plain Concrete
Concrete
ConcreteAdmixture
Other Binders/Water/ Gravel/Sand
Eco Indicator 99 [Points]
Total amount of primary energy from renewable and non-renewable resources
Potential contribution to climate change due to greenhouse gases emissions
Consumption of water (for the concrete production)
Impact score which takes into account several damage categories (to mineral and fossil resource, to ecosystem quality and to human health), which are then normalized and added to give a dimensionless result
CUMULATIVE ENERGY DEMAND [MJ]
GLOBAL WARMING POTENTIAL [KG CO2-EQ.]
INPUT WATER [M3 ]
ECO INDICATOR 99 [POINTS]
THE LCA DATA REFERS TO 1 M3 OF CONCRETE
0 50 100 150 200 250 300 350
Marine Concrete
Shrinkage reduced Concrete
Winter Concrete
Lining Concrete
Sprayed Concrete
High early strength Concrete
Frost resistant Concrete
Self compacting Concrete
Pumped Concrete
Waterproof Concrete
Plain Concrete
Cement
ConcreteAdmixture
Other Binders/Water/ Gravel/Sand
Global Warming Potential (GWP) [kg CO2 eq./m3 concrete]
0 0.05 0.1 0.15 0.2 0.25
Marine Concrete
Shrinkage reduced Concrete
Winter Concrete
Lining Concrete
Sprayed Concrete
High early strength Concrete
Frost resistant Concrete
Self compacting Concrete
Pumped Concrete
Waterproof Concrete
Plain Concrete
Input Water [m3/m3 Concrete]
Water
3
8 9CONCRETE
SUSTAINABLE SOLUTIONSCONCRETESUSTAINABLE SOLUTIONS
THE MAJOR CHARACTERISTIC of polycarboxylate ether-based superplasticizer technology is their targeted polymer design to achieve specific concrete properties.
Characteristics that can be influenced are:
Adsorption speed
Water reduction with high initial liquefaction / workability up to 40%.
Slump retention without retardation and subsequent fast strength development
Early strength development with sufficient workability time
Stickiness
Stability / viscosity
All spectrum combinations of these properties are optimized in Sika® Viscocrete® GR 5000. The polymers consist of backbones with carboxyl groups and side chains.
The first component – backbone with carboxyl groups – is responsible for the attainable water reduction / initial slump and mixing time respectively. The second one – side chains – determines the slump keeping capability of the superplasticizer, affected by an increasing number of side chains.
The crucial factor is the limited space for carboxyl groups and side chains along the backbone. Either a carboxyl group or side chain can be attached at a certain location. This leads to the technological limitation that there are essentially three different types of polymers – water reducing, slump controlling and slump retention polymers.
SIKA SUSTAINABILITY PERFORMANCE-EFFICIENCY APPROACH
CONCRETE ADMIXTURES & SUSTAINABILTY
SOLUTION
DURABILITY
SOURCE
ENERGY
OPTIMIZE CONCRETE MIX DESIGNSika® Viscocrete® GR 5000
REDUCE GRINDING TIMESikagrind® 421
REDUCE CURING TIMESika® Viscocrete® TS 100
REDUCE POROSITYSika® Viscocrete® GR 5000Sika® WT10Sika® Cure 100IMPROVE FROST RESISTANCESika® AerMINIMIZE SHRINKAGESika® Control 40
RECYCLING AGGREGATES Sika® Viscocrete® GR 5000
SECONDARY CEMENTITIOUS MATERIALSSika® Viscocrete® GR 5000
Sika® Viscocrete® TS 100
COLUMNSSelf impacted ConcreteSTRUCTURAL SLABS AND ROOFSDurable ConcretePREVIOUS CONCRETERecycled Aggregate
EFFICIENCY PERFORMANCE
Concrete is a building material with a remarkable product performance in case of durability and technical solutions and concrete admixtures are part of this successful concept!
Concrete admixtures are a relevant part to achieve a significant energy reduction of the concreting process. Admixtures have an
important task in respect to sustainability.
EFFICIENCY PERFORMANCE
Sika® Viscocrete® GR 5000 is designed to achieve the optimized ratios that meet our impact reduction requirements. Concrete admixtures, including Sika® Viscocrete® GR 5000, can improve the sustainability performance of concrete in many different ways.
Firstly, admixtures can improve the quality and performance of concrete significantly, which in return extends its service life. In addition, thanks to the use of admixtures, the application of concrete instead of other building materials can improve the life cycle of infrastructures.
The addition of Sika® Viscocrete® GR 5000 works as a stabilizing and hyper water reducing admixture, enabling the use of alternative and recycled materials such as recycled aggregates which also produce a good quality concrete.
Finally, in many cases the energy required to produce certain cement or concrete mixes will be positively impacted with the use of admixtures or other materials that follow LCA.
Sika® Viscocrete® GR 5000
Backbone
Side chains
Sika® Viscocrete® GR 5000
SIKA'S CONTRIBUTION TO SUSTAINABLE CONSTRUCTION
10 11CONCRETE
SUSTAINABLE SOLUTIONSCONCRETESUSTAINABLE SOLUTIONS
A JOINT STUDY WAS UNDERTAKEN between Sika's research and development centres in Dubai and Zurich. In these studies both centres carried out tests to evaluate the saving in the Cumulative Energy Demand and the Global Warming Potential that can be brought about by the use of this new generation admixture, Sika® Viscocrete® GR 5000. Different mix designs (Fig.1), raw materials & test results typical of those used in the GCC were analyzed and compared.
The main target was to calculate the benefit from use of mixes that followed sustainably designed versus conventional ones and quantify in real life and at any time the exact technical/environmental benefits and their contribution to sustainable buildings.
CONVENTIONAL CONCRETE VS. SUSTAINABLY DESIGNED GREEN CONCRETE
0100200300400500600700800900
100011001200130014001500160017001800190020002100220023002400250026002700
CONVENTIONALCONCRETE
LCA CONCRETE
TransportAggregateOther BindersAdmixtureCement
CUMULATIVE ENERGY DEMAND
SUSTAINABLY DESIGNED CONCRETE
020406080
100120140160180200220240260280300320340360380
CONVENTIONALCONCRETE
LCA CONCRETE
TransportAggregateOther BindersAdmixtureCement
GLOBAL WARMING POTENTIAL (CML 2001)
SUSTAINABLY DESIGNED CONCRETE
OPC 42.5 Slag Silica Fume
3 Different Aggregates
Dune Sand Water Admixture
Conventional Concrete Mix 440 kgs 1500 kgs 330 kgs 146 Ltr. 15.5 Ltr. SNF Base
Sustainably Designed Concrete mix 158 kgs 264 kgs 18 kgs 1500 kgs 330 kgs 146 Ltr. 4.5 Ltr. of Sika® Viscocrete® GR 5000
Fig. 1
Total amount of primary energy from renewable and non-renewable resources
CUMULATIVE ENERGY DEMAND [MJ/M3]
Potential contribution to climate change due to greenhouse gases emissions
GLOBAL WARMING POTENTIAL [KG CO2-EQ./M3]
CONVENTIONAL CONCRETE
CONVENTIONAL CONCRETE
SUSTAINABLY DESIGNEDGREEN CONCRETE
SUSTAINABLY DESIGNEDGREEN CONCRETE
Approx. Concrete Grade 60 Mpa (Mix)
SIKA FULL RANGE SOLUTIONS FOR CONSTRUCTION:
WATERPROOFING CONCRETE REFURBISHMENT
SEALING AND BONDING FLOORING ROOFING
FOR SIKA GCC INFORMATION:
WHO WE ARESika is a globally active specialty chemicals company, supplying the building and construction industry as well as manufacturing industries (automotive, bus, truck, rail, solar and wind power plants, façades). Sika is a leader in processing materials used in sealing, bonding, damping, reinforcing and protecting loadbearing structures. Sika’s product lines feature high quality concrete admixtures, specialty mortars, sealants and adhesives, damping and reinforcing materials, structural strengthening systems, industrial flooring as well as roofing and waterproofing systems.
Our most current General Sales Conditions shall apply. Please consult the Data Sheet prior to any use and processing.
gcc.sika.com
Sika Saudi Arabia Co. LtdP.O. Box 58647, Riyadh 11583Kingdom of Saudi ArabiaT: +966 11 2176532 F: +966 11 [email protected]
Sika UAE LLCP.O. Box 126212Dubai, UAET: +971 4 439 8200F: +971 4 439 [email protected]
Sika International Chemicals LLCP.O. Box 55172Abu Dhabi, UAET: +971 2 643 0364F: +971 2 676 [email protected]
Sika Gulf B.S.C.P.O. Box 15776Adliya, BahrainT: +973 17 738 188F: +971 17 732 [email protected]
Sika Qatar LLCP.O.Box 201847Doha, QatarT: +974 40163366F: +974 [email protected]
Sika Kuwait for Construction Materials & Paints W.L.LState of KuwaitT: +965 2228 2296F: +965 2228 [email protected]