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Service Offer Concrete and Mortar
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  • Service Offer Concrete and Mortar

  • Synergies gained from current research and expertise

    Customer-specific services and approval tests 4

    Testing of fresh concrete and fresh mortar 6

    Testing of hardened concrete and hardened mortar 8

    Durability testing 12

    Tests and expert reports with regard to 14 alkali-silica reaction

    Testing cement 16

    Testing aggregates 18

    Testing admixtures and additions 22

    Testing fibres, pigment and water 24

    Approvals and monitoring 26

    Expert reports and damage analysis 28

    Life cycle assessment and sustainability assessment 30

    Contact

    Dr.-Ing. Christoph [email protected]: +49 (0) 211 45 78-372fax: +49 (0) 211 45 78-219www.vdz-online.de

  • 3

    VDZ is a renowned and internationally recognised scientific in-stitution which provides industry-oriented research and a com-prehensive service portfolio in the field of cement and concrete and has been contributing to the highest possible quality of building materials for more than 135 years.

    Our interdisciplinary team provides answers to almost any questions about cement-based building materials according to the current state of science and technology. At the same time we offer our customers a service package that includes all major tests as well as consultancy services and complex expert reports. The combination of current research and competent service leads to synergies which are reflected in the high quality and practical relevance of our work.

    In our Concrete and Mortar division, our research and services engage in the answers to current and important questions in the areas of concrete constituents as well as the concrete technology and application of concrete.

  • 4

    Customer-specific services and approval tests

  • 5

    Through special tests for technical approvals the suitability of construction products (e.g. cements and concretes) for specific areas of application can be demonstrated. We carry out tests for the following approvals:

    National technical approvals (abZ) European Technical Assessments (ETA) KOMO-attests with product certificates in accordance

    with CUR 48

    Our service range comprises all stages of the approval proce-dure, such as the application, the compilation and implementa-tion of the testing programme, the preparation of the technical report and expert opinion on the suitability of the product. For special construction projects accompanying self-super- vision and third party inspection concepts are being provid-ed to ensure the quality of the constituents and the building materials. Special concrete and mortar mix formulations (e.g. for self-compacting concrete, high strength concrete etc.) can be developed upon customers request and, depending on the intended application, be investigated and tested with standard-ized test methods or with tests specific to the respective task.

    VDZ generates expert opinions in order to analyse damages on concrete constructions respectively to prevent damages in advance. For this, the well-equipped concrete laboratory offers a large variety of possibilities. For example, aggregates or concrete compositions are tested to answer the question whether one has to expect adverse affection of the durability, e.g. due to a harmful alkali-silica reaction (ASR) or a lacking freeze-thaw resistance. Furthermore, the service range also comprises the preparation of Life Cycle Assessments including the generating of Environmental Product Declarations (EPD) for cement and concrete. Our laboratory has modern technical equipment and is accredited according to EN ISO/IEC 17025 to carry out a variety of tests on concrete and aggregates.

  • 6

    Testing of fresh concrete and fresh mortar

  • 7

    Service Method

    Sampling EN 12350-1

    Consistence Slump test EN 12350-2

    Consistence Vebe test EN 12350-3

    Consistence Degree of compactability EN 12350-4

    Consistence Flow table test EN 12350-5

    Densitiy of fresh concrete EN 12350-6

    Air content according to the pressure gauge methods

    EN 12350-7

    Consistence of fresh mortar (Flow table / Hgermann-table)

    EN 1015-3

    Moisture content (kiln drying) DIN 1048-1

    Rheological measurements: dynamic viscosity yield value saturation point preparation of flow curves

    Rotational viscosimeter

    Determination of the zeta potential Electroacoustic measuring

    Expansion and bleeding of freshly mixed grouts for preplaced-aggregate concrete in the laboratory

    ASTM C940

    Flow of hydraulic cement mortar ASTM C1437 ASTM C230

    Time of setting of hydraulic cement by vicat needle

    ASTM C191

  • 8

    Testing of hardened concrete and hardened mortar

  • 9

    Testing of hardened concrete and hardened mortar

    Service Method

    Making and curing of

    specimens

    EN 12390-2

    Compressive strength EN 12390-3

    Flexural strength EN 12390-5

    Tensile splitting strength EN 12390-6

    Density of hardened concrete EN 12390-7

    Depth of penetration of water

    under pressure

    EN 12390-8

    Surface tensile strength, bond

    strength, adhesive tensile

    strength

    DIN 1048; ZTV-ING,

    *DAfStb maintenance

    directive: part 3, Annex C

    DAfStb directive Pro-

    tection and repair of con-

    crete building materials

    Static modulus of elasticity EN 12390-13ASTM C469

    Dynamic modulus of

    elasticity

    GrindoSonic method

    Moisture content and

    oven-dry density

    DIN 1048-5

    Flexural strength on steel fibre

    concrete beams

    EN 14651

    Cored specimens taking,

    examining, and testing in

    compression

    EN 12504-1

    Non-destructive testing (deter-

    mination of rebound number)

    EN 12504-2

    Composition of hardened

    concrete

    DIN 52170

    *DAfStb = German Committee for Structural Concrete

  • 10

    Testing of pore structure and heat of hydration

    Service Method

    Determination of air void

    characteristics in

    hardened concrete

    EN 480-11

    DAfStb series

    no. 422

    Water absorption under atmos-

    pheric pressure / at 15 MPa

    DAfStb series

    no. 422

    Capillary water absorption DAfStb series

    no. 422

    EN 480-5

    Pore content and pore distribution

    in concrete, mortar and hardened

    cement paste by mercury

    intrusion porosimetry

    DIN 66133

    Measuring permeability DAfStb series

    no. 422

    Determination of hydration heat

    of cement

    EN 196-9

    Release of heat and compressive

    strength development of concrete

    Thermo flask test

    C-value determination of cement DAfStb series

    no. 422

    Service Method

    Extraction of pore solution and

    chemical analysis

    Static modulus of elasticity and

    poissons ratio of

    ASTM C469

    Creep ofconcrete in

    compression

    ASTM C512, in cooper-

    ation with third parties

    Testing of hardened concrete and hardened mortar

  • 11

    Testing the shrinkage of concrete and mortar

    Service Method

    Autogenous shrinkage of

    cement paste and mortar

    Shrinkage cone method

    Shrinkage ring test

    Corrugated tube method

    ASTM C1698

    Drying shrinkage ISO 1920-8

    DAfStb series no. 422

    Shrinkage ring test

    DIN 52450

    EN 12617

    Length change of hardened

    hydraulic-cement mortar and

    concrete

    ASTM C490 / C490M

    ASTM C157 / C157M

    Restraint stresses due to

    shrinkage

    Restrained ring test

    Determining age at cracking and induced tensile stress

    ASTM C1581

    Shrinkage cracking propensity VDZ method

  • 12

    Durability testing

  • 13

    Service Method

    Testing of freeze and freeze-

    thaw resistance

    CIF/CDF test

    Slab test

    Cube test (VDZ)

    Beam test

    CEN/TS 12390-9

    CEN/TR 15177

    BAW Code of Practice

    Frost Resistance Tests

    for Concrete

    Chloride migration coefficient BAW Code of Practice

    Resistance of concrete

    to chloride penetration,

    NT Build 492

    Chloride diffusion coefficient

    (profile grinding)

    EN 12390-11

    Carbonation depth DAfStb series no. 422

    Prediction of durability results

    by hydration degree based

    characteristic values

    VDZ method

    Testing of abrasion (grinding

    wheel according to Bhme)

    DIN 52108

    EN 13892-3

    Testing of resistance of

    mortars against sulfate attack

    and sea water

    Civieltechnisch Centrum

    Uitvoering Research en

    Regelgeving Aanbeve-

    ling 48 (CUR 48)

    Testing the resistance to pene-

    tration of concrete against

    water polluting substances

    (FD- and FDE-concrete)

    DAfStb Guideline

    BUmwS

    Electrical indication of

    concretes ability to resist

    ASTM C1202

    Tests with regard to

    alkali-silica reaction

    see page 15

  • 14

    Tests and expert reports with regard to alkali-silica reaction

  • 15

    Testing of aggregates

    Service Method

    Accelerated mortar bar test at

    80 C (reference method)

    Part 3 Alkali Guidelines

    RILEM AAR-2

    Accelerated mortar bar test at

    70 C (alternative method)

    Part 3 Alkali Guidelines

    Concrete test with fog

    chamber storage (40 C)

    Part 3 Alkali Guidelines

    Concrete prism test at 60 C Part 3 Alkali Guidelines

    RILEM AAR-4.1

    Testing of concrete compositions (ASR performance test)

    Service Method

    60 C concrete test without

    external alkali supply

    AFNOR P 18-454

    60 C concrete test with

    external alkali supply

    VDZ method

    60 C concrete test on two

    drilled core halves (with or

    without alkali supply)

    VDZ method

    40 C fog chamber storage of

    drilled cores

    VDZ method

    Analysis of damage resulting

    from a harmful alkali-silica

    reaction

    Reflected light micros-

    copy, transmitted

    light microscopy, and

    scanning electron

    microscopy

    Expert reports for the suitability of aggregates and concrete compositions

    Preparation of expert reports In accordance with

    the general circular

    for road construction

    No. 04/2013 and for

    aviation areas

  • 16

    Testing of cement

  • 17

    Testing of cement

    Service Method

    Chemical and physical analysis

    on cement and mortar

    EN 196

    Hydration based parameters

    for the prediction of concrete

    durability

    VDZ method

    Extraction of pore solution and

    chemical analysis

    C-value determination of

    cement

    DAfStb series no. 422

    Consistence fresh mortar

    (Flow table / Hgermann-table)

    EN 1015-3

  • 18

    Testing aggregates

  • 19

    General properties of aggregates

    Service Method

    Sampling EN 932-1

    Reducing laboratory samples EN 932-2

    Procedure and terminology for sim-plified petrographic description

    EN 932-3

    Geometrical properties of aggregates

    Service Method

    Particle size distribution - Sieving method

    EN 933-1

    Particle shape - Flakiness index EN 933-3

    Particle shape - Shape index EN 933-4

    Percentage of crushed and broken surfaces in coarse aggregate particles

    EN 933-5

    Surface characteristics - Flow coefficient of aggregates

    EN 933-6

    Shell content - percentage of shells in coarse aggregates

    Assessment of fines:

    - Sand equivalent test EN 933-8

    - Methylene blue test EN 933-9

    - Grading of filler aggregates (air jet sieving)

    EN 933-10

    Classification test for the constitu-ents of coarse recycled aggregate

    EN 933 11

    Mechanical and physical properties of aggregates

    Service Method

    Resistance to wear (micro-Deval) EN 1097-1

    Resistance to fragmentation EN 1097-2

    Loose bulk density and voids EN 1097-3

    Voids of dry compacted filler EN 1097-4

  • 20

    Water content by drying in a ventilated oven

    EN 1097-5

    Particle density and water absorption EN 1097-6

    Particle density of filler - Pyknometer method

    EN 1097-7

    Polished stone value EN 1097-8

    Water suction height EN 1097 10

    Wehner-Schulze (WS) test method

    Thaulow method- Bulk density of aggregates with dense structure

    Thermal and weathering properties of aggregates

    Service Method

    Resistance to freezing and thawing EN 1367-1

    Magnesium sulfate test EN 1367-2

    Boiling test for Sonnenbrand basalt

    EN 1367-3

    Resistance to thermal shock EN 1367-5

    Resistance to freezing and thawing in the presence of salt (NaCl)

    EN 1367-6

    Chemical properties of aggregates

    Service Method

    Water-soluble chloride salts using the Volhard method (Reference method)

    EN 1744-1, Section 7

    Water-soluble sulfates EN 1744-1, Section 10

    Total sulfur content EN 1744-1, Section 11

    Acid soluble sulfates EN 1744-1, Section 12

    Acid soluble sulfide content EN 1744-1, Section 13

    Potential presence of humus EN 1744 1, Section 15.1

  • 21

    Water solubility EN 1744-1, Section 16

    Loss on ignition EN 1744-1, Section 17

    Preparation of eluates by leaching of aggregates

    EN 1744-3

    Acid soluble chloride salts EN 1744-5

    Influence of recycled aggregate extract on the initial setting time of cement

    EN 1744-6

    Further tests on request

    Alkali sensitivity (alkali-silica reactivity) of aggregates

    Service Method

    Petrographic analysis Alkali Guidelines

    Amount of opal sandstone including siliceous chalk

    Alkali Guidelines

    Flint bulk density Alkali Guidelines

    Amount of reactive flint Alkali Guidelines

    Accelerated mortar bar test at 80 C (reference method)

    Alkali Guidelines or RILEM AAR-2

    Accelerated mortar bar test at 70 C (alternative method)

    Alkali Guidelines

    Concrete test with fog chamber storage at 40 C

    Alkali Guidelines

    Concrete prism test at 60 C Alkali Guidelines or RILEM AAR-4.1

    WS basic testing of coarse aggregates

    according to the General Circular on Road Construction (ARS) No. 04/2013,method V2

  • 22

    Testing concrete admixtures and additions

  • 23

    Testing concrete additions

    Service Method

    Testing fly ash EN 450-1

    Testing silica fume EN 13263-1

    Testing blastfurnace slag meal EN 15167-1

    Testing concrete admixtures

    Service Method

    Electro-chemical test for corrosion susceptibility

    EN 480-14

    Suitability tests of concrete admixtures

    EN 934

    Suitability tests of grout for prestressing tendons

    EN 445EN 447

  • 24

    Testing fibres, pigment and water

  • 25

    Testing steel fibres

    Service Method

    Tensile strength of steel fibres EN ISO 6892-1

    Bending tensile strength of steel fibre concrete beams for the determination of performance classes

    DAfStb Guide-line Steel fibre concrete

    Bending tensile strength of steel fibre concrete beams

    EN 14651

    Consistence Vebe test EN 12350-3

    Testing pigments

    Service Method

    Testing pigments EN 12878

    Testing mixing water for concrete

    Service Method

    Testing mixing water EN 1008

  • 26

    Approvals and monitoring

  • 27

    Service Method

    Permanent concrete testing

    laboratory

    DIN 1045-3, Annex B

    Consulting of the construction

    company and the construction

    sites

    Provision of equipment for test-

    ing of fresh concrete

    DIN 1045-3, Annex A

    Training of site staff regarding

    the tests for the fresh concrete

    properties

    DIN 1045-3, Annex A

    Checking the records of the site

    staff, periodic supervision of the

    testing of fresh concrete

    Collection of test specimens on

    the construction site, testing of

    hardened concrete (particularly

    compressive strength)

    Accredited supervisory agency DIN 1045-3, Annex C

    Monitoring of cracks, placing of

    plaster markers

    Non-destructive determination of

    the concrete cover

    Electromagnetic

  • 28

    Expert reports and damage analysis

  • 29

    Service Method

    Non-destructive testing of com-pressive strength (rebound value)

    EN 12504-2

    Surface tensile strength, tear resistance, adhesive tensile strength

    DIN 1048-2; ZTV-ING; DAfStb Guideline Protection and repair of concrete building materials

    Non-destructive determination of concrete surfacing

    Electromagnetic Ultrasonic run time

    Crack monitoring, setting gypsum marks

    Concrete test at 60 C or concrete test with fog chamber storage at 40 C on drill cores (with or without alkali supply): Determining the residual expansion potential

    VDZ method

    Post-cracking flexural strength on steel fibre concrete beams (e.g. taken from an industrial floor)

    in line with the DAfStb Guideline

    Determination of the content and guide value of steel fibres (CT)

    Pore content and pore distri-bution with mercury intrusion porosimetry

    DIN 66133

    Capillary water absorption DAfStb series no. 422EN 480-5

    Water absorption under atmospheric pressure/ at 15 MPa

    DAfStb series no. 422

    Permeability measurement DAfStb series no. 422

    Taking samples from the structure (e.g. drill cores for compressive strength tests)

    EN 12504-1

    Leaching tests (tank test/shaking test)

    CEN/TS 16637-2EN 12457

    Composition of hardened concrete

    DIN 52170

  • 30

    Life cycle assessment and sustainability assessment

  • 31

    The service range of VDZ also includes the preparation of Life Cycle Assessments and Environmental Product Declarations (EPD) according to EN ISO 14040 and EN 15804 for cement and concrete. The rules developed by CEN/TC 350 for the construction sector are taken into account. On a national level, VDZ has drawn up life cycle assessments for average cements in Germany and concretes in various strength classes. These have been published in the EPD Program of the Institut Bauen und Umwelt e.V. (IBU) and can be downloaded here. VDZ also compiles product-specific Life Cycle Assessments and Environ-mental Product Declarations for cement manufacturers in Ger-many and throughout Europe.

    In addition, VDZ employees act as DGNB auditors. With the certification system of the German Sustainable Building Council (DGNB), which was developed in cooperation with the Feder-al Ministry for the Environment, Nature Conservation, Building and Safety (BMUB), buildings are assessed taking into account such aspects as environmental protection, cost effectiveness and user-friendliness with regard to sustainability. We offer the following services in this regard:

    Monitoring the planning process of buildings with DGNB sustainability criteria in mind

    Supervising the execution of work under the aspect of DGNB certification

    Conducting the final sustainability audit: review and in- spection of the compiled documents and verifications

  • VDZ gGmbHP.O. Box 30 10 63 40410 DuesseldorfTannenstrasse 2 40476 DuesseldorfGermany


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