Construction Chemicals for Concrete

1 1 Construction Chemicals for Concrete / PCS ConstructionEvonik s Additive Management Systems for Concrete2 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-friendlinessOur brands: SITREN SITREN AirVoid TEGO AntifoamTEGOSIVIN 31. 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 DensityThe production of Concrete requires intensive mixing with water.

2 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 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 to our in-depth knowledge in the field of interfacialtechnology, we can influence the interplay betweenair entrainersanddefoamersin a targeted way when both additive technologies are used entrainmentAir stabilizationAir void distributionAir void size controlDefoaming41.

3 AirVoid Management Optimum quality with our air entrainment additivesAIR ENTRAINERS AT A GLANCEAir 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 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 ENTRAINERF oaming capacityAir Stabilization WorkabilitySITREN AirVoid - Air entrained Concrete , freeze / thaw resistance etcXXXXXXXXX* Referred to binder material X = suitable XX = recommended XXX = highly recommendedProductDosage*ApplicationsPro duct Properties5 DEFOAMERS AT A GLANCE1.

4 AirVoid Management Optimum quality with our defoamer additivesOur AirVoid defoamers reduce Concrete air content resulting in higher flexural, tensile and compressive strengths andimproved abrasion resistance. The selection of the correctdefoamer chemistry ensures that neither cement hydrationnor the Concrete s early strength are adversely new liquid defoamer additives portfolio offers an extensive range of surfactant chemistries and combines theexpertise and the chemical know-how of two well establishedpartners* in the Concrete industry.* Evonik and Air Products Specialty additives . Further grades available on requestDEFOAMERD efoaming strengthDefoamer compatibilitySITREN AirVoid - %Ligno / Ligno-PCE blendsXXXXXxxSITREN AirVoid 307 Organomodified siloxane - %Ligno / Ligno-PCE blendsXXXXSITREN AirVoid - %PCE / LignoXXXXXXXSITREN AirVoid - %PCEXXXXXXXSITREN AirVoid - %PCEXXXXXXXSITREN AirVoid - %PCE / LignoXXXXXxx*Advice for SNF and SMF available upon request.

5 X = suitable XXX = recommended XXXXX = highly recommendedProduct PropertiesProductDosage by weight of superplasticizerRecommended Application*Chemistry62. Protection Management - No room for water / moisture with our water repellents> 90 Wetting angle of a water droplet on a hydrophobic surface Water repellentsare used to provide Concrete with durable protection against water and CA /HEwater repellents are designed to minimize the infiltrationof water and dissolved pollutants without compromising watervapor permeability. TEGOSIVIN water repellents also contribute to the reduction of primary and secondary efflorescence.

6 WATER REPELLENTS Product chemistry Dosage* Product Properties Water Repellency Efflorescence Control Tegosivin CA 880 Emulsion of alkoxy-functional silanes % xx x Tegosivin HE 328 Emulsion of organomodified siloxanes/silanes % xxx xx *Referred to cement x: suitable xx: recommended xxx: highly recommended 73. Curing Management - Ensuring stability with our shrinkage reducing agents Shrinkage reducing agentsare used to limit the crack formation and deformation of Concrete . Our new SITREN SRAproducts are liquid shrinkage reducing agents based on a novel technology.

7 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 SITREN SRA grades will belaunched in Q2/2018 SHRINKAGE REDUCING AGENTS hrinkage reductionLow EmissionSITREN SRA L 210 Nonionic - %Standard precast and readymix Concrete . Screeds, semi-dry, wetcast and high performance concreteXXXXXX* Referred to cement X = suitable XX = recommended XXX = highly recommendedApplicationsProduct PropertiesProductChemistryDosage*8 RELEASE AGENTS AT A GLANCE4.

8 Release Management - Mold release agentsThe demolding process and the associated use of mold releaseagents 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 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 RELEASE AGENTSR elease PropertiesMetal Corrosion ProtectionReadily Biodegradable SITREN MR 870vegetable oil emulsion 10 to 18 ml /m XXXXXXXXSITREN MR 871vegetable oil emulsion 10 to 18 ml /m XXXXXXXXX X = suitable XX = recommended XXX = highly recommendedProductChemistryDosage*Produc t Properties95)

9 Formulation Management - Innovative, tailor-made, solution oriented productsWETTING AGENTS / DISPERSING AGENTS / PROCESS DEFOAMERS AT A GLANCEEVONIK 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 10