Fresh and hardened concrete

VDZ Testing fresh and hardened concrete

Our concrete laboratory, accredited in accordance with ISO 17025, has extensive technical equipment which comprises all the important tests on fresh concrete and hardened concrete and also mortar in accordance with the standard series DIN EN 12350 and DIN EN 12390. At the customer's request, both concrete compositions can be optimised and special testing procedures developed. 

Testing of fresh concrete and fresh mortar

ServiceMethod
SamplingDIN EN 12350-1
Consistence - slump testDIN EN 12350-2
Consistence - vebe testDIN EN 12350-3
Consistence - degree of compactabilityDIN EN 12350-4
Consistence - flow table testDIN EN 12350-5
Fresh concrete densityDIN EN 12350-6
Air content according to the pressure gauge methodsDIN EN 12350-7
Consistence of fresh mortar (flow table/ Hägermann-table)DIN EN 1015-3
Moisture content (kiln drying)DIN 1048-1
Rheologic measurements:
  • dynamic viscosity
  • yield value
  • saturation point
  • yield curves
Rotational viscometer
Determination of the zeta potentialElectroacoustic measuring
Expansion and bleeding of freshly mixed grouts for preplaced-aggregate concrete in the laboratoryASTM C940
Flow of hydraulic cement mortarASTM C1437,
ASTM C230
Time of setting of hydraulic cement by vicat needleASTM C191

Testing of hardened concrete and hardened mortar

ServiceMethod
Making and curing of specimensDIN EN 12390-2
Compressive strengthDIN EN 12390-3
Flexural strengthDIN EN 12390-5
Tensile splitting strengthDIN EN 12390-6
Density of hardened concreteDIN EN 12390-7
Depth of penetration of water under pressureDIN EN 12390-8
Surface tensile strength, bond strength, adhesive tensile strengthDIN 1048; ZTV-ING;
*DAfStb maintenance  
directive: part 3, Annex C
DAfStb directive “Protection and repair of concrete building materials”
Static modulus of elasticityEN 12390-13,
ASTM C469
Dynamic Modulus of elasticityDIN 1048-5
Stamodulus of elasticityGrindosonic method
Moisture content and oven-dry densityDIN 1048-5
Flexural strength on steel fibre concrete beamsEN 14651
Cored specimens - taking, examining and testing in compressionEN 12504-1
Non-destructive testing (determination of rebound number)DIN EN 12504-2
Composition of hardened concreteDIN 52170
Extraction of pore solution and chemical analysis
Static Modulus of Elasticity and Poisson’s Ratio of Concrete in CompressionASTM C469
Creep of Concrete in CompressionASTM C512, in cooperation with third parties

Testing of pore structure and heat of hydration

ServiceMethod
Determination of air void characteristics in hardened concreteEN 480-11
DAfStb series  
no. 422
Water absorption under atmospheric pressure / at 15 MPaDAfStb series  
no. 422
Capillary water absorptionDAfStb series  
no. 422
DIN EN 480-5
Pore content and pore distribution in concrete, mortar and hardened cement paste by mercury intrusion porosimetryDIN 66133
Measuring permeabilityDAfStb series  
no. 422
Determination of hydration heat of cementDIN EN 196-9
Release of heat and compressive strength development of concreteThermo flask test
C-value determination of cementDAfStb series  
no. 422

Testing the shrinkage of concrete and mortar

ServiceMethod
Autogenous shrinkage of cement paste and mortarShrinkage cone method,
Shrinkage ring test,
Corrugated tube method, ASTM C1698
Drying shrinkageISO 1920-8
DAfStb series no. 422
Shrinkage ring test
DIN 52450
DIN EN 12617
Length change of hardened hydraulic-cement mortar and concreteASTM C490 / C490M
ASTM C157 / C157M
Restraint stresses due to shrinkageRestrained ring test
Determining Age at Cracking and Induced Tensile Stress Characteristics of Mortar and Concrete under Restrained ShrinkageASTM C1581
Shrinkage cracking propensityVDZ method

Contact

Dr. Christoph Müller

Dr. Christoph Müller

Phone:
+49-211-45 78-351

Fax:
+49-211-45 78-296

Service offer

Concrete and mortar: testing of fresh and hardened concrete – tests regarding alkali-silica reaction – testing aggregates and admixtures

Quality standards

The VDZ gGmbH is accredited by the Germany's National Accreditation Body according to DIN EN ISO/IEC 17025.