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Construction Chemicals for Concrete
20.02.2018 / PCS Construction
Evonik‘s Additive Management Systems for Concrete
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Our expertise – Interfacial phenomena within the construction industry
Our five management systems address the specific requirements of the construction industry, such as:
• Performance
• Durability
• Lifecycle management
• Appearance
• Resource efficiency
• Cost efficiency
• Eco-friendliness
Our brands: SITREN®
SITREN AirVoid®
TEGO® Antifoam
TEGOSIVIN®
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1. AirVoid Management – Control air with our defoamers and air entrainers
Air in concrete has a direct impact on:
• Workability
• Mechanical properties
• Durability
• Aesthetics
• Slump properties
• Density
The production of concrete requires intensive mixing with water. The shear forces introduced during mixing, in combinationwith surface-active components in the concrete formulation, result in the distribution and stabilization of uncontrolled air infresh concrete.
Defoamers are used for the prevention and removal of this undesired air. Air entrainers, in contrast, are used to introducecontrolled air voids for specific concrete applications and performance requirements.
Thanks to our in-depth knowledge in the field of interfacial technology, we can influence the interplay between air entrainers
and defoamers in a targeted way when both additive technologies are used in combination.
Air entrainment
Air stabilization
Air void distribution
Air void size control
Defoaming
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1. AirVoid Management – Optimum quality with our air entrainment additives
AIR ENTRAINERS – AT A GLANCE
Air entrainers are required to create stable and homogeneously distributed air voids. Depending on the requirements, air stabilizing additives
can optimize the size, content and distribution of the air voids.
SITREN AirVoid® 601 is based on synthetically produced surfactant technology and is characterized by a strong, predictable relationship between dosage and quantity of entrained air. SITREN AirVoid® 601 serves as a highly efficient air entrainer in concrete; delivering improved
workability, durability and cost savings.
AIR ENTRAINER
Foaming
capacity
Air Stabilization Workability
SITREN AirVoid 601 0.05 - 0.5% Air entrained
concrete, freeze /
thaw resistance etc
XXX XXX XXX
* Referred to binder material X = suitable XX = recommended XXX = highly recommended
Product Dosage* Applications
Product Properties
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DEFOAMERS – AT A GLANCE
1. AirVoid Management – Optimum quality with our defoamer additives
Our AirVoid® defoamers reduce concrete air content resulting in higher flexural, tensile and compressive strengths andimproved abrasion resistance. The selection of the correct defoamer chemistry ensures that neither cement hydrationnor the concrete’s early strength are adversely affected.
Our new liquid defoamer additives portfolio offers an extensive range of surfactant chemistries and combines theexpertise and the chemical know-how of two well established partners* in the concrete industry.
* Evonik and Air Products’ Specialty Additives. Further grades available on request
DEFOAMER
Defoaming
strength
Defoamer
compatibility
SITREN AirVoid 305 Polyether 0.1 - 1.0 % Ligno / Ligno-
PCE blendsXXXXX xx
SITREN AirVoid 307 Organomodified
siloxane emulsion
0.1 - 1.0 % Ligno / Ligno-
PCE blendsXX XX
SITREN AirVoid 312 Polyether 0.1 - 1.0 % PCE / Ligno XXX XXXX
SITREN AirVoid 320 Acetylenic 0.1 - 1.0 % PCE XXX XXXX
SITREN AirVoid 321 Acetylenic 0.1 - 1.0 % PCE XXX XXXX
SITREN AirVoid 325 Acetylenic 0.1 - 1.0 % PCE / Ligno XXXXX xx
*Advice for SNF and SMF available upon request. X = suitable XXX = recommended XXXXX = highly recommended
Product Properties
ProductDosage by weight of
superplasticizer
Recommended
Application*Chemistry
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2. Protection Management - No room for water / moisture with our water repellents
> 90 °
Wetting angle of a water droplet on a hydrophobic surface
Water repellents are used to provide concrete with durable protection against water and moisture. Our TEGOSIVIN® CA /HE water repellents are designed to minimize the infiltration of water and dissolved pollutants without compromising water
vapor permeability. TEGOSIVIN® water repellents also contribute to the reduction of primary and secondary efflorescence.
WATER REPELLENTS
Product Chemistry Dosage* Product Properties
Water Repellency Efflorescence Control
Tegosivin® CA 880 Emulsion of alkoxy-functional
silanes 0.1 – 1.0 % xx x
Tegosivin® HE 328 Emulsion of organomodified siloxanes/silanes
0.1 – 1.0 % xxx xx
*Referred to cement x: suitable xx: recommended xxx: highly recommended
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3. Curing Management - Ensuring stability with our shrinkage reducing agents
Shrinkage reducing agents are used to limit the crack formation and deformation of concrete. Our new SITREN® SRAproducts are liquid shrinkage reducing agents based on a novel technology. In addition to their environmental friendly, lowVOC characteristics, they have no significant impact on concrete setting and compressive strength. SITREN® SRA L 210 isthe first of our new liquid product line and significantly reduces both plastic and drying shrinkage at an attractive price /
performance ratio.
Further SITREN® SRA
grades will belaunched in
Q2/2018
SHRINKAGE REDUCING AGENT
Shrinkage
reduction
Low Emission
SITREN® SRA L 210 Nonionic surfactant 0.05 - 3.0 % Standard precast and
readymix concrete.
Screeds, semi-dry,
wetcast and high
performance concrete
XXX XXX
* Referred to cement X = suitable XX = recommended XXX = highly recommended
Applications
Product Properties
Product Chemistry Dosage*
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RELEASE AGENTS – AT A GLANCE
4. Release Management - Mold release agents
The demolding process and the associated use of mold release agents is becoming increasingly important due to theaesthetic demands on concrete structures. Smooth, defect-free and thus visually attractive concrete surfaces are seen todayas hallmarks of quality in manufactured building components.
SITREN® MR 870 and 871 are biodegradable, non-hazardous mold release agents which not only deliver outstanding releaseperformance, they also prevent concrete discoloration, surface residues and corrosion of metal molds.
MOULD RELEASE AGENTS
Release
Properties
Metal Corrosion
Protection
Readily
Biodegradable
SITREN® MR 870 vegetable oil
emulsion
10 to 18 ml /m² XXX XX XXX
SITREN® MR 871 vegetable oil
emulsion
10 to 18 ml /m² XXX XXX XXX
X = suitable XX = recommended XXX = highly recommended
Product Chemistry Dosage*
Product Properties
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5) Formulation Management - Innovative, tailor-made, solution oriented products
WETTING AGENTS / DISPERSING AGENTS / PROCESS DEFOAMERS – AT A GLANCE
EVONIK‘s extensive chemical toolbox
Process and performance additives that:
• Increase efficiency and compatibility of compounding
• Optimize mixing and processing procedures
• Improve adhesion properties
• Increased storage stability
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