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 Mü[email protected]: +49 (0) 211 45 78-372fax: +49 (0) 211 45 78-219www.vdz-online.de
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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.
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Customer-specific services and approval tests
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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 customer’s 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.
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Testing of fresh concrete and fresh mortar
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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 / Hägermann-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
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Testing of hardened concrete and hardened mortar
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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
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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
poisson’s ratio of
ASTM C469
Creep ofconcrete in
compression
ASTM C512, in cooper-
ation with third parties
Testing of hardened concrete and hardened mortar
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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
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Durability testing
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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 Böhme)
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
concrete’s ability to resist
ASTM C1202
Tests with regard to
alkali-silica reaction
see page 15
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Tests and expert reports with regard to alkali-silica reaction
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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
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Testing of cement
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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 / Hägermann-table)
EN 1015-3
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Testing aggregates
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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
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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
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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
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Testing concrete admixtures and additions
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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
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Testing fibres, pigment and water
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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
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Approvals and monitoring
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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
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Expert reports and damage analysis
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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
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Life cycle assessment and sustainability assessment
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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
