MasterSeal 7000 CR – the certified system against biogenic sulfuric acid attack

Biogas Plants

Biogas Plantsfrom Master Builders Solutions2

Risk minimization and short downtimesMechanical and chemical stress and impact leave their mark on the concrete structures and tanks of a biogas plant, creating challenging problems to ensure a smooth running operation. For the concrete structure to perform its function in these aggressive enviroments, and for the structure to be safe, choosing the right waterproofing and concrete protection solution is a crucial prerequisite.

Ideal combination of diverse propertiesBased on our new technology, our concrete protective system MasterSeal 7000 CR is specially designed to address these challenging and aggressive environments in Biogas tanks. The system combines extreme resistance to corrosion originating from biogenic sulfuric acid with crack bridging capacity and can also be applied on humid substrates, significantly saving time in environments where moist and wet substrates are the norm. The system significantly extends the life-cycle ensuring long-term operation, reduced maintenance and shorten downtime.

A Unique Protective System Based on XolutecTM Technology and Designed for Challenging Environments

The proven durability of MasterSeal 7000 CR ensures you long-term operation

Reduced maintenance

Shorten downtime

(at 23ºC) until fully operational, due to fast curing

24hwindow for appli- cation, manually or by spray

5ºC to 35ºCmoisture tolerance including application on humid substrates

Maximumcrack-bridging capability

0.7mmResistance including biogenic sulfutric acid

H2S

3Biogas Plantsfrom Master Builders Solutions

What to Look for Choosing the Solution –6 Factors to Consider

For the specific case of biogas plants, the following conditions and solution features should be considered when choosing the right solution:

Adhesion to concrete: Protection systems must have a complete adhesion to substrate to ensure durability of intervention.

Chemical resistance: Evaluated according EN 13529 where the loss of surface hardness of the protection system is measured after contact with some chemicals. Long term resistance, even under pressure requires a minimal loss of hardness of the membrane.

Selection of chemicals depend on the specific contact in each case, but in the situation of biogas plants, agents like sulphuric acid, organic acids or salts are to be tested.

Impermeability to CO2:

The protective membrane must be impermeable to CO2 to prevent carbonation of concrete and later corrosion of rebars.

Impermeability (water tightness) against positive and negative pressure: The capacity of a coating, when adhered to substrate, to avoid capillary absorption can be evaluated according EN 1062 part 3.

In the case of a tank or container the evaluation of the maximum direct hydraulic pressure that can be supported by the membrane can be measured according EN 12390 part 8 increasing the testing pressure up to 5 bar (i.e. 50 meters of water column) and controlling the absence of water passage to the substrate.

Mechanical resistance: Abrasive wear resistance is measured according EN ISO 5470 part 1 evaluating the loss of mass after being subjected to a revolving abrasive wheel under load. Additionally, mechanical impact resistance needs to be also evaluated by means of measuring the fall energy procedure EN ISO 6272 where the behavior (e.g. cracking or peeling from a substrate) of the membranes is checked when it is subjected to a deformation caused by a falling weight dropped under standard conditions.

Elastic or crack bridging characteristics: One of the most important characteristics of a protective coating is the capacity to remain continuous on substrates which may be subjected to movement.

It can be measured using both static and dynamic methods (EN 1067 part 7 methods A or B) and the results are classified under EN 1504 part 2.

Xolutec™ – the new technology for durable construction from Master Builders Solutions®

Xolutec™ can be used to achieve unique characteristics in a wide variety of solutions. These can include providing properties such as attractive aesthetics, excellent abrasion resistance or chemical resistance combined with effective

of ownership as a result of longer maintenance cycles and less downtime, or long-lasting aesthetics and increased durability.

Biogas Plantsfrom Master Builders Solutions4

Our Range of Durable, Proven and Certified Systems and Solutions for Biogas Plants For all-round safe and efficient operations:

MasterSeal 7000 CR § spray or hand-applied waterproofing system based on XolutecTM technology

§ Specific chemical resistance § Excellent curing § Fast and easy application § Crack-bridging § Maximum moisture tolerance

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1

Type of anaerobic digestion processes

with Mesophillic

bacteria

with Thermophillic

bacteria

Between 20-45 °C, with an optimal interval between 37-41 °C

Optimal conditions are between 50°-52 °C, but temperatures can be higher than 70 °C

MasterSeal 7000 CR

MasterSeal 7000 CR Contact BASF Technical Service for advice.

Process temperature Recommended system

MasterSeal 7000 CRs high resistance to abrasion and biogenic sulfuci acid corrosion are ideal to withstand the severe conditions that occur in pretreatment, digesters or sewers. Its dynamic and static crack-bridging abilities protect concrete from cracks thus prolonging the structures life cycle.

Solution for internal waterproofing with high chemical resistance

5Biogas Plantsfrom Master Builders Solutions

MasterSeal 6689 § Hot spray application § Very fast curing § Highly crack bridging and mechanical resistant

§ Resistant to chemicals found in biogas plants

MasterSeal 7000 CR § spray or hand-applied waterproofing system based on XolutecTM technology

§ Specific chemical resistance § Excellent curing § Fast and easy application § Crack-bridging § Maximum moisture tolerance

3

4

MasterSeal 6689 is based on the polyurea membrane MasterSeal M 689. It can be sprayed to horizontal and vertical as well as sloping surfaces. After only a short curing time, the material forms forms a reliable, full surface and seamless connection to the substrate. The surface is smooth and elastic.

Solution for water- proofing and protecting concrete structures

Biogas Plantsfrom Master Builders Solutions6

The overview shows 5 different systems advising solutions for steel surfaces and concrete structures that need repair and or a waterproofing and protective treatment.

Our Systems and Solutions in an Overview

System Build Up 1

System Build Up 2

System Build Up 3

System Build Up 4

System Build Up 5

SubstratePreparation

Steel / metal Concrete structure above

ground

Concrete structure above ground

that requires fast repairs

Concrete structure below

ground

Concrete structure below ground

that requires fast repairs

Fast repairMasterEmaco S

5440 RSMasterEmaco S

5440 RS

Primer and scratch coat

0,2–0,3 kg/m2

MasterSeal P 7700,2–0,3 kg/m2

MasterSeal P 7701,5 kg/m²

MasterSeal P 3850,2–0,3 kg/m2

MasterSeal P 770

Membrane0,8 kg/m2

MasterSeal M 7900,8–1 kg/m2

MasterSeal M 7900,8–1 kg/m2

MasterSeal M 7900,8–1 kg/m²

MasterSeal M 7900,8–1 kg/m2

MasterSeal M 790

Return to service 24 hours: Sprayed Mem-brane (ready for

service after 24 hours)

31 hours: Primer (recoating after 5 hours) + Sprayed Mem-brane (ready for

service after 24 hours)

53 hours: Repair (recovery after 24 hours)

Primer (recoating after 5 hours) + Sprayed Mem-brane (ready for

service after 24 hours)

48 hours: Primer (recoating after 24 hours) + Sprayed Mem-brane (ready for

service after 24 hours)

53 hours: Repair (recovery after24 hours)

Primer (recoating after 5 hours) + Sprayed Mem-brane (ready for

service after 24 hours)

7Biogas Plantsfrom Master Builders Solutions

The “Deutsches Institut für Bautechnik - DIBt” (German Institute for Construction Technology) issued the National Technical Approval Z-59.17-458 for the system MasterSeal 7000 CR applied on concrete for the use in tanks, bunker silos and for containment areas in storage and filling of liquid manure & silage as well as biogas facilities.

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 that may affect processing and application of our products, do not relieve processors from carrying out their own investigations and tests. The agreed contractual quality of the product at the time of transfer of risk is based solely on the data in the specification data sheet. Any descriptions, drawings, photographs, data, proportions, weights, etc. given in this publication may change without prior information. It is the responsibility of the recipient of our product to ensure that any proprietary rights and existing laws and legislation are observed (12/2015).

® = registered trademark of BASF group in many countries. EEBE 1920en

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BASF Construction Solutions GmbHHead Office Salzachstrasse 17 68199 Mannheim, Germany

P +49 (0)621 607 6400 F +49 (0)621 609 3433 admixtures-europe@basf.comwww.master-builders-solutions.basf.de

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