SIKA GYPSUM ADDITIVES
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SIKA GYPSUM ADDITIVES EFFICIENT AND SUSTAINABLE SOLUTIONS FOR THE GYPSUM INDUSTRY

SUSTAINABLE INCREASE OF PRODUCTION EFFICIENCY PLASTER BOARDS ARE PRODUCED in a highly automated continuous process. Quick setting and hardening are of critical importance to keep production running at high speed for optimal capacity utilization. Additive technologies for hydraulic binders is one of Sika's core competencies. For many years Sika develops customer-specific solutions for the gypsum and dry mortar industry. Sika offers professional support, tailored to the individual needs and requirements of its customers. ViscoCrete® Superplasticizer Retardan® Retarder CUSTOMIZED SOLUTIONS...

Sika solutions INDIVIDUAL – EFFICIENT – SUSTAINABLE SUSTAINABLE INCREASE OF PRODUCTION EFFICIENCY through individual process optimization WATER AND ENERGY SAVING through powerful superplasticizers and retarders through sustainable solutions CAPACITY UTILIZATION INCREASE through performance improvement

HIGH PERFORMANCE SUPERPLASTICIZER Sika® ViscoCrete® Sika® ViscoCrete® – high performance superplasticizers are based on PCE (polycarboxylate ether) technology. Their dispersing effect is based on two mechanisms: 1. WORK MECHANISM The comb polymer structure of Sika® ViscoCrete® made it possible, by changing the polymer design, to adjust targeted specific application-related properties, in particular the water-reducing capacity, the processing time, rheology, strength development, air entrainment and adsorption rate. USE OF HIGH-PERFORMANCE SUPERPLASTICIZERS Sika® ViscoCrete® can be used for...

2. APPLICATION BENEFITS THE MOST IMPORTANT ADVANTAGES AT A GLANCE: ́ Strong liquefaction already at very low dosages ́ High water reduction possible ́ Individual solutions, customized to the application system ́ Short mixing times ́ Enables formaldehyde-free products ́ Good compatibility and synergies with other additives ́ Consistent quality ́ Worldwide available ́ Also available as a powder if there is a risk of frost WATER DEMAND FOR THE LIQUEFACTION OF PLASTER SLURRY Between 65% and 75% of the added water must be evaporated from the board after rehydration of the plaster. This requires...

EFFICIENT RETARDERS Sika® Retardan® Retardan® ADDITIVES are very efficient retarders available in liquid and powder form that have been in use in the gypsum industry for decades. They show excellent performance in adjusting the setting and processing time for a wide range of calcium sulphate binders, also in combination with other additives such as rheological additives, foaming agents and accelerators. They are characterized by a very low dosage and a high retarding effect in the various gypsum binder systems. SETTING AND HARDENING CONTROL Initial and final setting of gypsum can be...

OPTIMIZATION OF THE REACTION PROCESS 100 20 "Snap-Set" (Accelerator + Retarder) Time [minutes] THE MAIN ADVANTAGES ́ Shifting the beginning of hydration without loss of intensity ́ No inhibition of crystal growth (in contrast to fruit acids) ́ Rapid strength development and higher final strength ́ Steadily consistent quality and worldwide availability ́ Defined production with synthetic raw materials under controlled conditions

APPLICATION EXAMPLES EXAMPLE 1: REPLACING THE WATER REDUCER DURING GYPSUM BOARD PRODUCTION FORMULATION AND SAVING POTENTIAL PNS Costs Superplasticizer Energy costs Total costs Cost saving The saving potential shown in the sample calculation through the replacement of superplasticizers corresponds to approx. € 150,000 per 10 Mio m² gypsum board. Further savings result from lower water consumption, reduced CO2 emissions, increased production speed and thus improved capacity utilization as well as increased board quality. As a result of the water reduction, the capillary pore space of the...

EXAMPLE 2: REPLACEMENT OF THE INITIAL RETARDER FOR THE SETTING CONTROL PERFORMANCE COMPARISON OF DIFFERENT RETARDERS w/g=0.65 Time [minutes] Protein hydrolysate Sika® Retardan®-200 L is highly concentrated to reduce transportation costs and storage capacity. It is typically diluted directly prior usage to an active substance content of 2 ... 5%. Alternatively, products with a lower active substance content are available (e.g. Retardan®-2010 L).

PRODUCT RANGE OVERVIEW SOLUTIONS FOR (GYPSUM) BOARDS AND DRY MORTARS Product Name Gypsum Boards High-performance super plasticizers & Water reducer Gypsum Retarder Sika® Retardan® Grinding Aids Foaming Agent Sika® Lightcrete SikaRapid® (Hardening Accelerator) Sigunit® (Setting Accelerator) Compaction Aids Fibers (micro / macro) Color pigments Sika® Silicoll and SikaFume® Mould Release Agent Sika® Separol® Paints / surface protection Sika® ViscoCr

LEARN MORE! Scan the code and you will receive further information as well as our current product range. Gypsum Blocks Refractory Mortar Lightweight mortar and lightweight concrete elements

WORLDWIDE SYSTEM SOLUTIONS FOR CONSTRUCTION AND INDUSTRY CORROSION AND FIRE PROTECTION BUILDING FINISHING As a subsidiary of the globally operative Sika AG, Baar/Switzerland, Sika Deutschland GmbH is one of the leading suppliers of building chemical product systems as well as sealants and adhesives for industrial manufacturing. SIKA DEUTSCHLAND GMBH Kornwestheimer Straße 103-107 D-70439 Stuttgart Phone +49 711 8009 - 0 Fax +49 711 8009 - 321 info@de.sika.com www.sika.de Business Unit Gypsum and Dry Mortar Additives Peter-Schuhmacher-Straße 8 D-69181 Leimen Phone +49 6224 988 - 04 Fax +49...