SIST EN 12390-17:2019

Testing hardened concrete - Part 17: Determination of creep of concrete in compression

This document describes the procedure for determining the creep (total, autogenous (basic) and drying) of hardened concrete test specimens subjected to a sustained longitudinal compressive load.
The test is suitable for specimens having a declared value of D of the coarsest fraction of aggregates actually used in the concrete (Dmax) not greater than 32 mm.

Prüfung von Festbeton - Teil 17: Bestimmung des Kriechens von Beton unter Druckspannung

Dieses Dokument beschreibt das Verfahren zur Bestimmung des Kriechens (Gesamtkriechen, Grundkriechen und Trocknungskriechen) von Probekörpern aus Festbeton, die einer andauernden Längsdruck¬beanspruchung ausgesetzt sind.
Die Prüfung ist geeignet für Probekörper mit einem Nennwert D des Größtkorns der tatsächlich im Beton verwendeten Gesteinskörnung (Dmax) von höchstens 32 mm.

Essais pour béton durci - Partie 17 : Détermination du fluage du béton en compression

Le présent document décrit le mode opératoire pour déterminer le fluage (fluage total, fluage propre et fluage de dessiccation) d’éprouvettes de béton durci soumises à une charge de compression longitudinale prolongée.
L’essai est adapté aux éprouvettes ayant une valeur déclarée D de la partie la plus grosse des granulats réellement utilisés dans le béton (Dmax) ne dépassant pas 32 mm.

Preskušanje strjenega betona - 17. del: Določanje lezenja betona pod tlakom

Ta dokument opisuje postopek za določanje lezenja (skupnega, avtogenega (osnovnega) in v času sušenja) preskušancev iz strjenega betona, ki so podvrženi trajni vzdolžni tlačni obremenitvi. Preskus je primeren za preskušance, pri katerih je deklarirana vrednost D najbolj grobega agregata, ki je dejansko uporabljen v betonu (Dmax), največ 32 mm.

General Information

• Status: Published
• Public Enquiry End Date: 24-May-2018
• Publication Date: 12-Nov-2019
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: BBB - Concrete, reinforced concrete and prestressed concrete
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 16-Oct-2019
• Due Date: 21-Dec-2019
• Completion Date: 13-Nov-2019
• Ref Project: EN 12390-17:2019 - Testing hardened concrete - Part 17: Determination of creep of concrete in compression

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 12390-17:2019
01-december-2019
Preskušanje strjenega betona - 17. del: Določanje lezenja betona pod tlakom

Testing hardened concrete - Part 17: Determination of creep of concrete in compression

Prüfung von Festbeton - Teil 17: Bestimmung des Kriechens von Beton unter
Druckspannung

Essais pour béton durci - Partie 17 : Détermination du fluage du béton en compression

Ta slovenski standard je istoveten z: EN 12390-17:2019
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
SIST EN 12390-17:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 12390-17:2019
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SIST EN 12390-17:2019
EN 12390-17
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 91.100.30
English Version
Testing hardened concrete - Part 17: Determination of
creep of concrete in compression

Essais pour béton durci - Partie 17 : Détermination du Prüfung von Festbeton - Teil 17: Bestimmung des

fluage du béton en compression Kriechens von Beton unter Druckspannung
This European Standard was approved by CEN on 19 August 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12390-17:2019 E

worldwide for CEN national Members.
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EN 12390-17:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Principle ............................................................................................................................................................. 7

5 Apparatus ........................................................................................................................................................... 7

6 Test specimens .............................................................................................................................................. 10

7 Procedure........................................................................................................................................................ 10

8 Calculation of creep (total creep, basic creep and drying creep) ............................................... 13

9 Test report ...................................................................................................................................................... 14

10 Precision .......................................................................................................................................................... 15

Bibliography ................................................................................................................................................................. 16

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EN 12390-17:2019 (E)
European foreword

This document (EN 12390-17:2019) has been prepared by Technical Committee CEN/TC 104 “Concrete

and related products”, the secretariat of which is held by SN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by April 2020, and conflicting national standards shall be

withdrawn at the latest by April 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document is based on ISO 1920-9 and ASTM C512-02.
This standard is one of a series on testing concrete.
EN 12390, Testing hardened concrete, consists of the following parts:
— Part 1: Shape, dimensions and other requirements for specimens and moulds;
— Part 2: Making and curing specimens for strength tests;
— Part 3: Compressive strength of test specimens;
— Part 4: Compressive strength – Specification for testing machines;
— Part 5: Flexural strength of test specimens;
— Part 6: Tensile splitting strength of test specimens;
— Part 7: Density of hardened concrete;
— Part 8: Depth of penetration of water under pressure;

— Part 10: Determination of the carbonation resistance of concrete at atmospheric levels of carbon

dioxide;

— Part 11: Determination of the chloride resistance of concrete, unidirectional diffusion;

— Part 12: Determination of the potential carbonation resistance of concrete: Accelerated carbonation

method (in preparation);
— Part 13: Determination of secant modulus of elasticity in compression;

— Part 14: Semi-adiabatic method for the determination of heat released by concrete during its

hardening process;

— Part 15: Adiabatic method for the determination of heat released by concrete during its hardening

process;
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SIST EN 12390-17:2019
EN 12390-17:2019 (E)
— Part 16: Determination of the shrinkage of concrete;
— Part 17: Determination of creep of concrete in compression.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
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SIST EN 12390-17:2019
EN 12390-17:2019 (E)
1 Scope

This document describes the procedure for determining the creep (total creep, basic creep and drying

creep) of hardened concrete test specimens subjected to a sustained longitudinal compressive load.

The test is suitable for specimens having a declared value of D of the coarsest fraction of aggregates

actually used in the concrete (D ) not greater than 32 mm.
max
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 12350-1, Testing fresh concrete — Part 1: Sampling and common apparatus

EN 12390-1:2012, Testing hardened concrete — Part 1: Shape, dimensions and other requirements for

specimens and moulds

EN 12390-2, Testing hardened concrete — Part 2: Making and curing specimens for strength tests

EN 12390-3, Testing hardened concrete — Part 3: Compressive strength of test specimens

EN 12390-16, Testing hardened concrete — Part 16: Determination of the shrinkage of concrete

EN 12504-1, Testing concrete in structures — Part 1: Cored specimens — Taking, examining and testing

in compression
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
initial strain

strain measured immediately after the application of the test load on the specimen

3.2
creep

strain under constant load obtained in defined conditions of temperature and relative humidity

3.2.1
total creep

strain measured under constant load in defined conditions of temperature and relative humidity after

subtracting initial and shrinkage strain
3.2.2
basic creep

strain measured under constant load in isothermal conditions and in the absence of moisture exchange

between the specimen and the surrounding environment
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EN 12390-17:2019 (E)
3.2.3
drying creep
difference between total and basic creep
3.3
shrinkage strain
strain of specimens determined in accordance with EN 12390-16
3.4
total strain:
strain measured during the test
Note 1 to entry: This strain is the sum of initial strain, creep and shrinkage.
3.5
gauge length
base length
length used as reference for strain measurement

Note 1 to entry: Gauge length may be a straight line laying on the lateral surface of the specimen and parallel to

the principal axis or between two planes.
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EN 12390-17:2019 (E)
3.6
measurement points

positions along a straight line laying on the lateral surface of the specimen and parallel to the principal

axis (see Figure 1 a)) or in two planes (see Figure 1 b))
a) Measurement points in a line parallel
b) Measurement points in two planes
to principal axis
Key
L Gauge length
Figure 1 — Measurement points
4 Principle

Test specimens are subject to changes in length when subjected to a constant compressive load in

defined conditions of temperature and relative humidity.
5 Apparatus
5.1 Loading frame

The loading frame shall be sufficiently rigid to ensure uniform loading of the specimen(s) and capable of

applying and maintaining the required load to within ± 3 % on the specimen or group of specimens for

the duration of the test, irrespective of any change in the dimension of the specimen(s).

NOTE 1 An example of a schematic diagram of a loading frame with 3 specimens operated by a hydraulic

arrangement for the measurement of total or basic creep is given in Figure 2. Similar arrangements can also be

used for a spring-loaded system in which only the system of loading will be different.

Load shall be measured with a maximum permissible error of ± 2 %.

The flatness tolerance for any plates or platens shall be 0,05 mm for the area in contact with the

specimen.

NOTE 2 For the purpose of this document, flatness can be assessed by the measurement of straightness in four

positions (see EN 12390-1:2012, Annex B).

A maximum of 3 specimens may be stacked for simultaneous loading in a single loading frame.

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EN 12390-17:2019 (E)
Key
1 Distance plates 5 Pressure gauge
2 Spherical bearing 6 Hydraulic accumulator
3 Test specimen 7 From pump
4 Length measuring system

Figure 2 — Example of schematic diagram of a loading frame operated by hydraulics for the

measurement of creep in the case of 3 specimens tested simultaneously
5.2 Drying room or cabinet

A drying room or cabinet with suitably controlled temperature and humidity, shall be used for storing

specimens in air and for measuring their length.
The drying room or cabinet shall meet the following requirements.

a) Air shall be circulated through the room or cabinet so that the same specified conditions are

attained adjacent to all specimens under test.
The air velocity should not exceed 0,5m/s near the specimens.
b) The temperature in the room or cabinet shall be maintained at (20 ± 2) °C.

c) The relative humidity in the room or cabinet shall have a target value of between 50 % and 70 %

and maintained within ± 5 % of the target value. Other values may be used if allowed by national

provisions valid in place of use.

d) The temperature and relative humidity of the room or cabinet shall be monitored throughout the

duration of the test and recorded at intervals not exceeding 24 h.

Separate provisions may be required in the case of manual recording of data during laboratory

closure periods.

The drying room or cabinet shall be fitted with suitable racks for storing specimens. The racks shall

permit free circulation of air around specimens, except for necessary supports, and shall be so situated

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with respect to the nearest wall or other obstruction that air circulation is not restricted in the

intervening space. The horizontal supports shall consist of non-absorptive members having a total

bearing width supporting the specimen of not more than 25 mm.
5.3 Length change measuring system
5.3.1 General

The length change measuring device shall have a resolution of at least 0,001 mm. The maximum

permissible error of for gauge lengths of 400 mm or more shall be ± 0,01 mm and for gauge lengths less

than 400 mm it shall be ± 0,005 mm. Gauges relying on friction contact shall not be used.

5.3.2 Callipers or rule
The callipe
...