EN 12390-15:2019
(Main)Testing hardened concrete - Part 15: Adiabatic method for the determination of heat released by concrete during its hardening process
Testing hardened concrete - Part 15: Adiabatic method for the determination of heat released by concrete during its hardening process
This document specifies the procedure for the determination of heat released by concrete during its hardening process in adiabatic condition.
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 15: Adiabatisches Verfahren zur Bestimmung der Wärme, die während des Erhärtungsprozesses von Beton freigesetzt wird
Dieses Dokument legt das Verfahren zur Bestimmung der Wärme fest, die von Beton während des Erhärtungsprozesses unter adiabatischen Bedingungen freigesetzt wird.
Die Prüfung eignet sich für Probekörper, für die der Nennwert D der gröbsten der im Beton verwendeten Gesteinskörnungen (Dmax) höchstens 32 mm beträgt.
Essais pour béton durci - Partie 15 : Méthode adiabatique de détermination de la chaleur dégagée par le béton en cours de durcissement
Le présent document spécifie le mode opératoire de détermination de la chaleur dégagée par le béton au cours de son processus de durcissement en condition adiabatique.
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 - 15. del: Adiabatska metoda za ugotavljanje toplote, ki se sprosti med procesom strjevanja betona
Ta evropski standard določa postopek za ugotavljanje toplote, ki se sprosti med procesom strjevanja betona v adiabatskem stanju.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-oktober-2019
Preskušanje strjenega betona - 15. del: Adiabatska metoda za ugotavljanje toplote,
ki se sprosti med procesom strjevanja betona
Testing hardened concrete - Part 15: Adiabatic method for the determination of heat
released by concrete during its hardening process
Prüfung von Festbeton - Teil 15: Adiabatisches Verfahren zur Bestimmung der Wärme,
die während des Erhärtungsprozesses von Beton freigesetzt wird
Essai pour béton durci - Partie 15: Méthode adiabatique de détermination de la chaleur
dégagée par le béton au cours de son processus de durcissement
Ta slovenski standard je istoveten z: EN 12390-15:2019
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 12390-15
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2019
EUROPÄISCHE NORM
ICS 91.100.30
English Version
Testing hardened concrete - Part 15: Adiabatic method for
the determination of heat released by concrete during its
hardening process
Essai pour béton durci - Partie 15 : Méthode Prüfung von Festbeton - Teil 15: Adiabatisches
adiabatique de détermination de la chaleur dégagée Verfahren zur Bestimmung der Wärme, die während
par le béton en cours de durcissement des Erhärtungsprozesses von Beton freigesetzt wird
This European Standard was approved by CEN on 17 June 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 12390-15:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms, definitions, symbols and scripts . 4
3.1 Terms and definitions . 4
3.2 Symbols and scripts . 5
4 Principle . 6
5 Apparatus . 6
5.1 Thermometers . 6
5.2 Balance . 6
5.3 Temperature monitoring and control system . 6
5.4 Adiabatic calorimeter . 7
6 Procedure. 8
7 Expression of results . 9
7.1 Measured temperature rise and intrinsic temperature rise . 9
7.2 Adiabatic heat release . 10
8 Report . 10
9 Precision . 11
Annex A (normative) Calibration of the equipment . 12
Annex B (informative) Calculation of the intrinsic temperature rise of concrete . 14
Bibliography . 15
European foreword
This document (EN 12390-15:2019) 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 January 2020, and conflicting national standards shall
be withdrawn at the latest by January 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 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 of 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: Testing hardened concrete. 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
— 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
— Part 16: Determination of shrinkage of concrete (in preparation)
— Part 17: Determination of creep of concrete in compression (in preparation)
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.
1 Scope
This document specifies the procedure for the determination of heat released by concrete during its
hardening process in adiabatic condition.
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
EN 12390-2, Testing hardened concrete — Part 2: Making and curing specimens for strength tests
3 Terms, definitions, symbols and scripts
3.1 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 http://www.iso.org/obp
3.1.1
adiabatic equipment
equipment whose error of adiabatism, as defined in 3.1.2, is less than 0,05 K/h at least in the
temperature range 20 °C to 70 °C, and the ratio between the heat capacity of calorimeter and the heat
C
cal
capacity of the sample is less or equal than 0,1
C
con
3.1.2
adiabatism error
α
rate of decrease in temperature (K/h) of a fully hydrated reference concrete sample
Note 1 to entry: A concrete sample can be considered to be fully hydrated when cured for 12 months in
accordance with EN 12390-2.
3.1.3
intrinsic temperature rise
*
∆T
c
temperature rise in concrete in the absence of heat transfer from the concrete sample to the
surrounding environment
3.1.4
adiabatic heat release
q
heat released by concrete during its hydration in adiabatic conditions as a function of time
3.1.5
calorimeter cell
element containing the sample container (mould) and having the external enclosure with uniform
temperature distribution which is provided by a controlled conditioning system
Note 1 to entry: As a consequence of uniform temperature distribution in the region defined by the sample
mould and the external envelope, adiabatic conditions should be ensured.
3.2 Symbols and scripts
Table 1 — Symbols, units and explanation
Symbol Units Explanation
C J/K
heat capacity of the calorimeter
cal
C
J/K
total heat capacity of the concrete specimen alone
con
α K/h adiabatism error
*
K
∆T intrinsic temperature rise
c
q(t) J/kg heat release at time t
T °C
initial temperature of fresh concrete
con,0
T (t) °C
temperature of the concrete specimen at time t
con
T (t) °C
temperature of the calorimeter cell at time t
cal
ΔT K
measured temperature rise
m
ΔT K
corrected temperature rise
c
t h time elapsed since start of test t
t —
initial time of test (first contact of cement with water)
Δt min time interval between two measures of temperature
c J/(kg·K)
specific heat of cement
c
c J/(kg·K)
specific heat of aggregate
a
c
J/(kg·K)
specific heat of additions
ad
c J/(kg·K)
specific heat of water in sample
w
m kg
mass of concrete sample
con
m kg
nominal mass of cement in the mix design per cubic metre
c
m kg
nominal mass of additions in the mix design per cubic metre
ad
m kg
nominal mass of aggregate in the mix design per cubic metre
a
Symbol Units Explanation
m kg
nominal mass of water in the mix design per cubic metre
w
m
kg
sum of the masses of empty mould, probe tube and mould cover
mould
Q J heat applied to mass of distilled water
— regression coefficient
R
I A intensity of direct current
C J/K total heat capacity of the system equipment containing calibration sample, a
T
reference sample or the calibration medium
C
J/K
heat capacity of distilled water
dw
m (Q ) J/g hydration heat developed in m grams of concrete
c i t con
If needed, more accurate values of specific heat of the concrete constituent materials may be used (see
Annex C of EN 12390-14:2018 semi-adiabatic method).
4 Principle
The test determines the quantity of heat released from the concrete during its hardening process in an
adiabatic condition at regular intervals from just after casting of the specimen.
The test is carried out using an adiabatic calorimeter which has been constructed to minimize the heat
loss from the concrete sample.
A sample of freshly mixed concrete is placed in a mould which is then introduced into the adiabatic
calorimeter and the internal temperature of the hardening concrete is measured.
The test is suitable for concrete containing all types of cement referred to in EN 206, with the exception
of quick-setting cements.
5 Apparatus
5.1 Thermometers
To measure the temperature of the concrete sample (T ) and the temperature of the calorimeter cell
con
(T ) with a maximum permissible error of 0,3 K in the working range of the test (10 °C to 100 °C).
cal
NOTE Platinum resistance thermometers are the preferred thermometers when calibrating the equipment.
5.2 Balance
To measure the mass of the concrete to a maximum permissible error of 0,1 %.
5.3 Temperature monitoring and control system
A closed loop control system capable of providing a uniform temperature distribution over all the
external enclosure of the calorimeter cell and able to automatically adjust the temperature of t
...
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