SCHOMBURG GmbH & Co. KG Aquafinstr. 2-8 Detmold NRW 32760, Germany
Agrément Certificate 20/5741
Tel: +49 5231 953 00 Fax: +49 5231 953 333 e-mail: info@schomburg.de website: www.schomburg.com
Product Sheet 1
SCHOMBURG WATERPROOF CONCRETE CONSTRUCTION SYSTEM BETOCRETE-CL210-WP UK This Agrément Certificate Product Sheet(1) relates to BETOCRETE-CL-210-WP UK, a combined water resisting pore blocker and crystalline waterproofing liquid admixture for use in concrete mixes to provide watertight concrete suitable for basements, roofs, swimming pools, tunnels and culverts. (1) Hereinafter referred to as ‘Certificate’.
CERTIFICATION INCLUDES: • factors relating to compliance with Building Regulations where applicable • factors relating to additional non-regulatory information where applicable • independently verified technical specification • assessment criteria and technical investigations • design considerations • installation guidance • regular surveillance of production† • formal three-yearly review.† KEY FACTORS ASSESSED Water penetration and absorption, and water vapour permeability — concrete containing the product has reduced permeability when compared with the equivalent plain concrete (see sections 6 and 7). Reinforcement protection — concrete containing the product has enhanced resistance to reinforcement corrosion when compared with the equivalent plain concrete (see section 8). Mechanical properties — the mechanical properties of the concrete are not adversely affected by the incorporation of the product (see section 9). Durability — concrete containing the product is more durable than the equivalent plain concrete owing to its reduced permeability (see section 18). The BBA has awarded this Certificate to the company named above for the product described herein. This product has been assessed by the BBA as being fit for its intended use provided it is installed, used and maintained as set out in this Certificate. On behalf of the British Board of Agrément Date of First issue: 15 April 2020
Hardy Giesler Chief Executive Officer
Certificate amended on 21 October 2022 to update product name. This Certificate was amended on 22 May 2024 as part of a transition of The BBA Agrément Certificate scheme delivered under the BBA’s ISO/IEC 17020 accreditation. This Certificate was issued originally under accreditation to ISO/ IEC 17065. Sections marked with the symbol † are not issued under accreditation. Full conversion to the ISO/IEC 17020 format will take place at the next Certificate review. The BBA is a UKAS accredited Inspection Body (No.4345). Readers MUST check the validity of this Agrément Certificate by either referring to the BBA website or contacting the BBA directly. Any photographs are for illustrative purposes only, do not constitute advice and must not be relied upon.
British Board of Agrément 1st Floor, Building 3 Hatters Lane, Croxley Park Watford WD18 8YG
©2020
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tel: 01923 665300 clientservices@bbacerts.co.uk www.bbacerts.co.uk
Regulations In the opinion of the BBA, the use of BETOCRETE-CL-210-WP UK is not subject to the national Building Regulations.
Construction (Design and Management) Regulations 2015 Construction (Design and Management) Regulations (Northern Ireland) 2016 Information in this Certificate may assist the client, designer (including Principal Designer) and contractor (including Principal Contractor) to address their obligations under these Regulations. See sections:
3 Delivery and site handling (3.1, 3.2, 3.4 and 3.5) and 22 Placing (22.1) of this Certificate.
Additional Information NHBC Standards 2020 In the opinion of the BBA, BETOCRETE-CL-210-WP UK, if installed, used and maintained in accordance with this Certificate, can satisfy or contribute to satisfying the relevant requirements in relation to NHBC Standards, Chapter 5.4 Waterproofing of basements and other below ground structures. Unless it can be demonstrated that the water table is permanently below the underside of the slab, the product should be used in combination with either a Type A or C waterproofing protection where Grade 3 protection is required and the below ground wall retains more than 600 mm (measured from the top of the retained ground to the lowest finished floor level).
CE marking The Certificate holder has taken the responsibility of CE marking the product, in accordance with harmonised European Standard BS EN 934-2 : 2009, Table 9.
Technical Specification 1 Description BETOCRETE-CL-210-WP UK is a combined water resisting pore blocker and crystalline waterproofing liquid admixture for incorporation into concrete mixes, to enhance the water resistance and durability properties of the hardened concrete.
2 Manufacture 2.1 The product is manufactured by a blending process. 2.2 As part of the assessment and ongoing surveillance of product quality, the BBA has: • • • • • •
agreed with the manufacturer the quality control procedures and product testing to be undertaken assessed and agreed the quality control operated over batches of incoming materials monitored the production process and verified that it is in accordance with the documented process evaluated the process for management of nonconformities checked that equipment has been properly tested and calibrated undertaken to carry out the above measures on a regular basis through a surveillance process, to verify that the specifications and quality control operated by the manufacturer are being maintained.
2.3 The management system of Schomburg GmbH & Co. KG has been assessed and registered as meeting the requirements of BS EN ISO 9001 : 2015 by TÜV Rheinland Cert GmbH (Certificate 01 100 6383/05).
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3 Delivery and site handling 3.1 BETOCRETE-CL-210-WP UK is supplied in 25 and 220 kg containers, and 1040 kg intermediate bulk containers (IBC). 3.2 Each container bears the manufacturer’s name, product name, batch number, Health and Safety information, and the BBA logo incorporating the number of this Certificate. 3.3 The product must be stored in sealed original containers in a dry environment at temperatures between 5 and 40°C. The product has a shelf-life of 12 months when stored under these conditions. 3.4 The Certificate holder has taken the responsibility of classifying and labelling the product under the CLP Regulation (EC) No 1272 / 2008 on the classification, labelling and packaging of substances and mixtures. Users must refer to the relevant Safety Data Sheet(s). 3.5 When handling, the normal Health and Safety procedures associated with cementitious materials should be observed.
Assessment and Technical Investigations The following is a summary of the assessment and technical investigations carried out on BETOCRETE-CL-210-WP UK.
Design Considerations 4 Use 4.1 BETOCRETE-CL-210-WP UK is satisfactory for use in concrete mixes at an addition of 2% by weight of cement to provide watertight concrete for basements, roofs, swimming pools, tunnels and culverts. 4.2 The effects of the product on the properties of concrete designed to BS EN 480-1 : 2014 is shown in Table 1 of this Certificate. Table 1 Effects of the product on the properties of fresh wet concrete(1) Property Water/cement ratio Slump (mm) 0 min 30 min Plastic density (kg·m-3) Air content (%)
Control concrete 0.43
BETOCRETE-CL-210-WP UK (2% wt/wt Portland Cement) 0.40
70 55 2377 2
70 10 2367 3.5
(1) The specific effect of the product on these properties, for a particular mix and site conditions, should be evaluated through site specific trials prior to use.
4.3 Concrete containing the product should be designed in accordance with BS EN 206 : 2013 and BS 8500-2 : 2015, for use as all normal types, including precast, pre-stressed, post-tensioned, ready-mixed, reinforced, slip-formed, sprayed and pump concretes. 4.4 The product is compatible with cement blends containing pulverised-fuel ash, ground granulated blast furnace slag and silica fume blends, as defined in BS EN 197-1 : 2011. 4.5 The use of the product with an air-entraining agent is outside the scope of this Certificate.
5 Practicability of installation Concrete mixes containing the product can be placed, compacted and cured by operatives with experience of using conventional concreting methods and equipment.
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6 Water penetration and absorption 6.1 Concrete containing the product has greater resistance to water penetration and water absorption than the equivalent plain concrete. 6.2 Tests on concrete containing the product, at an addition rate of 2% by weight of cement, showed a water permeability(1) of 1.17 x 10-13 m∙s-1, compared with 7.74 x 10-13 m∙s-1 for control concrete. 6.3 Tests on concrete containing the product, at an addition rate of 2% by weight of cement, showed a capillary absorption(1) of 41% by mass of the control concrete at 7 days, and 59% by mass of the control concrete at 90 days. (1) The specific effect of the product on these properties, for a particular mix and site conditions, should be evaluated through site trials prior to use.
7 Water vapour permeability 7.1 Concrete containing the product has a lower permeability to water vapour than that of the equivalent plain concrete. 7.2 Tests on concrete containing the product at an addition of 2% by weight of cement showed a water vapour permeability(1) of 516 x 10-12 g·m(N·s)-1 compared with 761 x 10-12 g·m(N·s)-1 for control concrete. (1) The specific effect of the product on these properties, for a particular mix and site conditions, should be evaluated through site trials prior to use.
7.3 Concrete made with a high water/cement ratio can have a water vapour permeability greater than 3000 x 10-12 g·m(N·s)-1. The permeability of concrete is strongly dependent on the exact mix design, and the figures given in section 7.2 indicate the levels that can be obtained using the product. 7.4 The appropriate thickness for concrete with a specific permeability to achieve a water vapour resistance of 200 or 500 MN∙sg-1(1) (suitable for grade 3 to BS 8102 : 2009) is given by: For 200 MN∙sg-1, t=0.2 x 1012 x p For 500 MN∙sg-1, t=0.55 x 1012 x p where: t p
is the concrete thickness in mm is the water vapour permeability in g∙m(N∙s)-1 (from tests to BS 3177 : 1959).
(1) This figure may be used where a high resistance to water vapour is required.
8 Reinforcement protection 8.1 The high level of alkalinity required to prevent corrosion of the reinforcement (pH > 13) will not be adversely affected by the incorporation of the product in the concrete. 8.2 Corrosion of the reinforcement is normally caused by the ingress of chloride to the steel or by the reduction in alkalinity of the concrete by the diffusion of carbon dioxide. The reduced permeability of concrete containing the product will slow down diffusion of aggressive agents into the concrete and so provide improved protection against reinforcement corrosion. 8.3 The Certificate holder has declared the chloride ion content of the product as <0.1%. 8.4 The Certificate holder has declared that the product complies with the corrosion behaviour requirements given in BS EN 934-1 : 2008, Clause 5.1, and is labelled accordingly.
9 Mechanical properties The compressive strength, flexural strength and static modulus of elasticity of concrete containing the product is similar to that of the equivalent plain concrete. Page 4 of 9
10 Drying shrinkage and wetting expansion 10.1 The drying shrinkage and wetting expansion of concrete containing the product is reduced compared with that of the equivalent plain concrete. 10.2 Tests conducted on concrete containing the product showed a drying shrinkage(1) of 0.032% compared with 0.046% for control concrete, and a wetting expansion(1) of 0.010% compared with 0.021% for control concrete. (1) The specific effect of the product on these properties for a particular mix and site conditions should be evaluated through site trial prior to use.
11 Setting characteristics and hardening 11.1 The effect of the product for a specific mix and site conditions should be evaluated through site trials prior to use. 11.2 The setting time of concrete containing the product will be retarded when compared with equivalent plain concrete. The amount of retardation will depend on the concrete mix design used and the ambient temperature during placing and curing. 11.3 Tests conducted on concrete containing the product showed an initial set of 220 minutes compared to 180 minutes for the control and a final set of 330 minutes compared to 295 minutes for the control.
12 Carbonation resistance Concrete containing the product has greater resistance to carbon dioxide diffusion than the equivalent plain concrete.
13 Frost resistance Concrete containing the product has similar resistance to freeze/thaw to that of the equivalent plain concrete.
14 Sulfate resistance The lower permeability of concrete containing the product will reduce the ingress of sulfates. However, if sulfateresistant concrete is required, the advice of the Certificate holder should be sought.
15 Alkali silica reaction (ASR) 15.1 Concrete containing the product should be designed in accordance with BS EN 206 : 2013 Section 5.2.3.5 and BS 8500-2 : 2015 Clause 5.2. 15.2 The sodium oxide equivalent of the product, when measured in accordance with BS EN 480-12 : 2005, was 4.54% by mass of admixture. The Certificate holder’s declared value of ≤8.5% should be used when calculating the contribution of the product to the total alkali content of a given concrete mix. In turn, this can be used to assess the susceptibility of that concrete to alkali-silica reaction.
16 Resistance to leaching Use of the product will reduce the leaching of lime from the hydrated cement in concrete.
17 Maintenance For a specific installation, the maintenance regime should be considered to ensure that the required design life of the concrete is achieved.
18 Durability 18.1 Under normal conditions of service, concrete containing the product is more durable than the equivalent plain concrete, owing to its reduced permeability. Page 5 of 9
18.2 Where exposure to aggressive soil conditions or chemicals is anticipated, a full assessment of the site should be made. In these situations, the Certificate holder should be consulted on the suitability of the product.
Installation 19 General 19.1 When used in concrete mixes, the product enhances durability and improves protection against reinforcement corrosion by providing the concrete with reduced permeability that protects against water ingress via absorption and hydrostatic pressure. 19.2 The use of the product will produce a concrete with the following properties relative to a control: • • • •
reduced porosity reduced permeability increased water resistance increased corrosion resistance.
19.3 The product has no known detrimental effect on the properties of concrete. 19.4 Structures built incorporating the product should be designed to the relevant clauses of BS 8102 : 2009, and BS EN 1992-1-1 : 2004, BS EN 1992-1-2 : 2004 and BS EN 1992-3 : 2006 and their UK National Annexes. 19.5 The product is suitable for Type B constructions as defined in BS 8102 : 2009, and can satisfy the requirements for all grades defined in Table 2 of this Standard. For Grade 3 (where control of water vapour is required), it will be necessary to provide the mix with a sufficiently low vapour permeability in combination with an adequate section thickness (see sections 7.2 and 7.3). The use of suitable ventilation, dehumidification or air conditioning, appropriate to the intended use, must also be considered. 19.6 Basements for dwellings should be designed in accordance with the guidance given in the Guidance Document — Basements for dwellings(1). (1) Published by Basement Information Centre, Product code: TBIC/007.
20 Mix design 20.1 Concrete containing the product is normally supplied as ready-mixed concrete but may be prepared on sites where there is adequate mix control(1). Preparation of concrete on site should be carried out in accordance with BS 8000-0 : 2014, the Certificate holder’s instructions and this Certificate. (1) NHBC will only accept use of the admixture where included at the concrete batching plant which must also be either QSRMC or BSI Kitemark registered.
20.2 The concrete must have a minimum cement content of 350 kg·m–3 and be batched with a maximum water/cement ratio of 0.40. Further details of suitable mixes can be obtained from the Certificate holder. 20.3 Once the fresh concrete is mixed, further materials must not be added. 20.4 The workability of concrete can be adjusted using a suitable(1) water reducing or superplasticising admixture complying with BS EN 934-2 : 2009, to ensure that the maximum water/cement ratio given in section 20.2 of this Certificate is not exceeded. Specific admixtures have not been considered and are outside the scope of this Certificate. (1) The Certificate holder’s advice should be sought regarding the suitability and compatibility of water-reducing or superplasticising admixtures. Admixtures should be evaluated before use and site trials should be carried out to establish the appropriate dose required.
21 Site mixing 21.1 The product is added to the mixer at the correct dose (see section 4.1) prior to batching the concrete constituents. Page 6 of 9
21.2 When an additional superplasticiser is required, it must be added after the addition of the product and in accordance with the supplier’s recommendations. 21.3 The resulting concrete should be mixed for a minimum of five minutes and in accordance with the Certificate holder’s instructions, to ensure even distribution of the product throughout the concrete. 21.4 Where the product is to be added to concrete on site, care must be taken to ensure that adequate mix control is available.
22 Placing 22.1 Concrete containing the product should be placed in the same way as normal concrete, in accordance with BS 8000-0 : 2014, BS EN 13670 : 2009, the Certificate holder’s Health and Safety guidance and the normal routine precautions for handling concrete. 22.2 Concrete containing the product should not be placed at temperatures of 5°C or below. 22.3 Concrete containing the product mix should be fully compacted.
23 Curing The concrete must be cured strictly in accordance with BS EN 13670 : 2009, and BS EN 1992-1-1 : 2004 and its UK National Annex, and the Certificate holder’s recommendations (where site specific information exists).
24 Joints 24.1 Joints must be designed with waterstops as recommended in BS 8102 : 2009, to maintain the watertightness of the whole structure. The advice of the Certificate holder should be sought on particular applications. 24.2 Penetrations of the concrete, such as pipe entries or formwork ties, must also be securely sealed to maintain watertightness. The Certificate holder can advise on suitable systems.
25 Finishes When water-based products are used to coat the hardened concrete, a bonding agent may be required. For specific cases, advice should be sought from the Certificate holder. These are outside the scope of the Certificate.
Technical Investigations 26 Tests 26.1 Tests were carried out and the results assessed to determine the effect of the product on the properties of concrete designed in accordance with BS EN 480-1 : 2014. 26.2 Tests were carried out and the results assessed to determine the characteristics of fresh concrete, including: • • • • •
setting time workability air content slump density.
26.3 Tests were carried out and the results assessed to determine the characteristics of hardened concrete, including: • • • •
flexural strength compressive strength bond to steel wetting expansion Page 7 of 9
• • • • • • •
efflorescence freeze/thaw resistance water vapour permeability capillary absorption modulus of elasticity drying shrinkage liquid water permeability.
26.4 Tests carried out for the characterisation of BETOCRETE-CL-210-WP UK admixture including: • • • •
homogeneity and colour water soluble chloride alkali content (Na2O equivalent) IR spectroscopy.
27 Investigations The manufacturing process was evaluated, including the methods adopted for quality control, and details were obtained of the quality and composition of the materials used.
Bibliography BS 3177 : 1959 Method for determining the permeability to water vapour of flexible sheet materials used for packaging BS 8000-0 : 2014 Workmanship on construction site — Introduction and general principles BS 8102 : 2009 Code of practice for protection of below ground structures against water from the ground BS 8500-2 : 2015 + A1 : 2016 Concrete — Complementary British Standard to BS EN 206 — Specification for constituent materials and concrete BS EN 197-1 : 2011 Cement — Composition, specifications and conformity criteria for common cements BS EN 206 : 2013 + A1 : 2016 Concrete — Specification, performance, production and conformity BS EN 480-1 : 2014 Admixtures for concrete, mortar and grout — Test methods — Reference concrete and reference mortar for testing BS EN 480-12 : 2005 Admixtures for concrete, mortar and grout — Test methods — Determination of alkali content of admixtures BS EN 934-1 : 2008 Admixtures for concrete, mortar and grout — Common requirements BS EN 934-2 : 2009 + A1 : 2012 Admixtures for concrete, mortar and grout — Concrete admixtures — Definitions, requirements, conformity, marking and labelling BS EN 1992-1-1 : 2004 Eurocode 2 : Design of concrete structures — General rules and rules for buildings NA to BS EN 1992-1-1 : 2004 UK National Annex to Eurocode 2 : Design of concrete structures — General rules and rules for buildings BS EN 1992-1-2 : 2004 Eurocode 2 : Design of concrete structures — General rules — Structural fire design NA to BS EN 1992-1-2 : 2004 UK National Annex to Eurocode 2: Design of concrete structures — Structural fire design BS EN 1992-3 : 2006 Eurocode 2: Design of concrete structures — Liquid retaining and containing structures NA to BS EN 1992-3 : 2006 UK National Annex to Eurocode 2: Design of concrete structures — Liquid retaining and containing structures BS EN 13670 : 2009 Execution of concrete structures BS EN ISO 9001 : 2015 Quality management systems — Requirements
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Conditions of Certificate Conditions 1. This Certificate: • • • • • •
relates only to the product that is named and described on the front page is issued only to the company, firm, organisation or person named on the front page – no other company, firm, organisation or person may hold or claim that this Certificate has been issued to them is valid only within the UK has to be read, considered and used as a whole document – it may be misleading and will be incomplete to be selective is copyright of the BBA is subject to English Law.
2. Publications, documents, specifications, legislation, regulations, standards and the like referenced in this Certificate are those that were current and/or deemed relevant by the BBA at the date of issue or reissue of this Certificate. 3 This Certificate will be displayed on the BBA website, and the Certificate Holder is entitled to use the Certificate and Certificate logo, provided that the product and its manufacture and/or fabrication, including all related and relevant parts and processes thereof: • • •
are maintained at or above the levels which have been assessed and found to be satisfactory by the BBA continue to be checked as and when deemed appropriate by the BBA under arrangements that it will determine are reviewed by the BBA as and when it considers appropriate.
4. The BBA has used due skill, care and diligence in preparing this Certificate, but no warranty is provided. 5. In issuing this Certificate the BBA is not responsible and is excluded from any liability to any company, firm, organisation or person, for any matters arising directly or indirectly from: • • • • • •
the presence or absence of any patent, intellectual property or similar rights subsisting in the product or any other product the right of the Certificate holder to manufacture, supply, install, maintain or market the product actual installations of the product, including their nature, design, methods, performance, workmanship and maintenance any works and constructions in which the product is installed, including their nature, design, methods, performance, workmanship and maintenance any loss or damage, including personal injury, howsoever caused by the product, including its manufacture, supply, installation, use, maintenance and removal any claims by the manufacturer relating to UKCA, UKNI or CE marking.
6. Any information relating to the manufacture, supply, installation, use, maintenance and removal of this product which is contained or referred to in this Certificate is the minimum required to be met when the product is manufactured, supplied, installed, used, maintained and removed. It does not purport in any way to restate the requirements of the Health and Safety at Work etc. Act 1974, or of any other statutory, common law or other duty which may exist at the date of issue or reissue of this Certificate; nor is conformity with such information to be taken as satisfying the requirements of the 1974 Act or of any statutory, common law or other duty of care.
British Board of Agrément 1st Floor, Building 3, Hatters Lane Croxley Park, Watford Herts WD18 8YG
©2024
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