BS EN 1015-9:1999: Methods of test for mortar for masonry. Determination of workable life and correction time of fresh mortar

10 Pages·1999·0.419 MB·English

BRITISH STANDARD | BS EN
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Methods of test for |
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mortar for masonry — |
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Part 9: Determination of workable life |
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and correction time of fresh mortar |
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TheEuropeanStandardEN1015-9:1999hasthestatusofa |
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BritishStandard |
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ICS91.100.10 |
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NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW |
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BS EN 1015-9:1999
National foreword
ThisBritishStandardistheEnglishlanguageversionofEN1015-9:1999.Itis
includedinapackageofstandardsrelatingtomasonrymortarandrenderingand
plasteringmortardeclaredbyCEN/TC125.Thepackageofstandardswillsupersede
thefollowingBritishStandards:
BS4551-1:1998,Methodsoftestingmortars,screedsandplasters—
Part1:Physicaltesting;
BS4721:1981,Specificationforready-mixedbuildingmortars;
BS5838-2:1980,Specificationfordrypackagedcementitiousmixes—
Part2:Prepackedmortarmixes;
whichwillbewithdrawnon30September2000ifalltheEuropeanStandards
includedinthepackageareavailable.
TheUKparticipationinitspreparationwasentrustedbyTechnicalCommittee
B/519,Masonryandassociatedtesting,toSubcommitteeB/519/2,Mortar,whichhas
theresponsibilityto:
— aidenquirerstounderstandthetext;
— presenttotheresponsibleEuropeancommitteeanyenquiriesonthe
interpretation,orproposalsforchange,andkeeptheUKinterestsinformed;
— monitorrelatedinternationalandEuropeandevelopmentsandpromulgate
themintheUK.
Alistoforganizationsrepresentedonthissubcommitteecanbeobtainedonrequest
toitssecretary.
Cross-references
TheBritishStandardswhichimplementinternationalorEuropeanpublications
referredtointhisdocumentmaybefoundintheBSIStandardsCatalogueunderthe
sectionentitled“InternationalStandardsCorrespondenceIndex”,orbyusingthe
“Find”facilityoftheBSIStandardsElectronicCatalogue.
ABritishStandarddoesnotpurporttoincludeallthenecessaryprovisionsofa
contract.UsersofBritishStandardsareresponsiblefortheircorrectapplication.
Compliancewith aBritishStandarddoesnotofitselfconferimmunity
from legalobligations.
Summary ofpages
Thisdocumentcomprisesafrontcover,aninsidefrontcover,theENtitlepage,
pages2to6,aninsidebackcoverandabackcover.
TheBSIcopyrightnoticedisplayedinthisdocumentindicateswhenthedocument
waslastissued.
ThisBritishStandard,having Amendmentsissuedsincepublication
beenpreparedunderthe
directionoftheSector Amd.No. Date Comments
CommitteeforBuildingandCivil
Engineering,waspublishedunder
theauthorityoftheStandards
Committeeandcomesintoeffect
on15November1999
(cid:211) BSI11-1999
ISBN0580354679
EN 1015-9
EUROPEAN STANDARD
´
NORME EUROPEENNE
¨
EUROPAISCHE NORM August 1999
ICS91.100.10
English version
Methods of test for mortar for masonry — Part 9: Determination of
workable life and correction time of fresh mortar
Me´thodes d’essai des mortiers pour mac¸onnerie— Pru¨fverfahren fu¨r Mo¨rtel fu¨r Mauerwerk—
Partie9: De´termination de la pe´riode d’ouvrabilite´ Teil9: Bestimmung der Verarbeitbarkeitszeit und der
et du temps ouvert du mortier frais Korrigierbarkeitszeit von Frischmo¨rtel
This European Standard was approved by CEN on 8 July 1999.
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 Central Secretariat 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 Central Secretariat has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
United Kingdom.
CEN
European Committee for Standardization
Comite´ Europe´en de Normalisation
Europa¨isches Komitee fu¨r Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
(cid:211) 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national
Members.
Ref. No. EN 1015-9:1999 E
Page 2
EN 1015-9:1999
Foreword Contents
This European Standard has been prepared by Page
TechnicalCommitteeCEN/TC125,Masonry, the
Foreword 2
Secretariat of which is held by BSI.
1 Scope 3
This European Standard shall be given the status of a
national standard, either by publication of an identical 2 Normative references 3
text or by endorsement, at the latest by February2000,
3 Principle 3
and conflicting national standards shall be withdrawn
4 Apparatus 3
at the latest by December2001.
According to the CEN/CENELEC Internal Regulations, 5 Sampling, preparation and storage of
the national standards organizations of the following test samples 3
countries are bound to implement this European 6 MethodA— Workable life of general
Standard: Austria, Belgium, Czech Republic, Denmark, purpose mortar 4
Finland, France,Germany, Greece, Iceland, Ireland,
7 MethodB— Workable life of
Italy,Luxembourg,Netherlands,Norway,Portugal,
thin-layer mortar 4
Spain, Sweden, Switzerland and the United Kingdom.
8 MethodC— Correction time of
thin-layer mortar 4
9 Testreport 5
(cid:211) BSI11-1999
Page 3
EN 1015-9:1999
1 Scope 4.1.4 A penetration rod, consisting of a round brass
rod, approximately 5mm in diameter and with a total
This European Standard specifies methods for
length of approximately 65mm, its lower end enlarged
determining the workable life and correction time of –
to a diameter of 6,175mm 0,025mm over a length of
freshly mixed mortars (in the following referred to as –
25mm 0,25mm and with the penetrating face flat at
fresh mortars).
right angles to the length of the rod.
MethodA is a method for the determination of the
4.1.5 A loosely fitting brass washer, approximately
workable life of general purpose masonry or rendering
20mm in external diameter, rests on the stop formed
mortars, including those containing mineral binders
at the change in diameter of the rod. The rod is held
and both dense and lightweight aggregates.
vertically in a device such as a lever type drill stand
MethodsB andC are methods for the determination of
that enables it to be lowered vertically in a controlled
the workable life and correction time for thin-layer
and steady manner over a distance of at least 40mm.
mortars.
(See Figure1.)
4.1.6 A palette knife.
2 Normative references
4.1.7 A trowel.
This European Standard incorporates by dated or
undated reference, provisions from other publications. 4.2 Apparatus for MethodB— Workable life of
These normative references are cited at the thin-layer mortar
appropriate places in the text and the publications are
4.2.1 A flow table, in accordance with EN1015-3.
listed hereafter. For dated references, subsequent
amendments to or revisions of any of these 4.2.2 A trowel.
publications apply to this European Standard only
4.2.3 A palette knife.
when incorporated in it by amendment or revision. For
undated references the latest edition of the publication 4.3 Apparatus for MethodC— Correction time
referred to applies. of thin-layer mortar
prEN 771, Specification for masonry units. 4.3.1 Masonry units, of the material to be used in
prEN 998-1, Specification for mortar for masonry— practice as substrate for the actual thin-layer mortar.
Part1: Rendering and plastering mortar with
4.3.2 Aweighing instrument, accurate to 0,1% of the
inorganic binding agents.
mass of the weighed masonry unit.
prEN 998-2, Specification for mortar for masonry—
4.3.3 Aventilated oven, capable of maintaining
Part2: Masonry mortar. – –
temperatures of 1058C 58C, 708C 58C and
EN 1015-2, Methods of test for mortar for masonry— –
608C 58Crespectively.
Part2: Bulk sampling of mortars and preparation of
test mortars. 4.3.4 A trowel.
EN 1015-3:1998, Methods of test for mortar for 4.3.5 A palette knife.
masonry— Part3: Determination of consistence of
4.3.6 A storage chamber, capable of maintaining a
fresh mortar (by flow table). –
temperature of 208C 28C and a relative humidity of
–
65% 5%.
3 Principle
The workable life of a sample of fresh mortar, initially 5 Sampling, preparation and storage of
brought to a defined flow value, is measured by the test samples
time in minutes at which it reaches a defined limit of
The fresh mortar for this test shall have a minimum
stiffness or workability during a defined type test.
volume of 1,5l or at least 1,5 times the quantity needed
to perform the test, whichever is the greater, and shall
4 Apparatus be obtained either by reduction of the bulk test sample
(see EN1015-2) using a sample divider or by quartering
4.1 Apparatus for MethodA — Workable life of
or by preparation from dry constituents and water in
general purpose mortar
thelaboratory.Theflowvalue of the mortar in the bulk
4.1.1 Aweighing instrument, preferably with a tare test sample shall be determined in accordance with
device, reading to at least 15kg with graduations of EN1015-3 and reported.
not greater than 100g. Laboratory mixed samples shall, before testing, be
brought to a defined flow value as specified in
4.1.2 Disposable, rigid and open topped moulds or
EN1015-2.
containers, with an internal diameter of not less than
75mm and 50mm to 100mm high. Ready to use mortars (factory-made wet mortars which
are retarded), and pre-batched air-lime/sand wet
4.1.3 A stop clock.
mortars when not gauged with hydraulic binders, shall
be tested within their specified workable life.
(cid:211) BSI11-1999
Page 4
EN 1015-9:1999
The length of mixing period shall be measured from Determine the time in minutes, rounded to the nearest
the moment all constituents are introduced into the minute, to give the resistance to penetration of
mixer. 0,5N/mm2 by interpolation of the results immediately
Beford testing, the batch shall be gently stirred by below and above this figure.
hand using a trowel or palette knife for 5s to 10s to Calculate the mean value from the individual values of
counteract any false settingetc., but without any each mortar test sample, all values rounded to the
additional mixing of the batch. nearest minute. The mean value is the workable life of
Any deviation from the mixing procedure shall be themortar.
noted.
Two test samples shall be tested. 7 MethodB— Workable life of thin-layer
mortar
6 MethodA — Workable life of general
7.1 General
purpose mortar
The workable life is measured by the time in minutes
at which the flow value of the mortar differs by 30mm
6.1 General
from the initial flow value determined 10min after
The workable life of the fresh mortar is measured by
mixing the batch.
the time in minutes at which it reaches a defined limit
of resistance to penetration of a standard rod forced 7.2 Procedure
into it. Determine the flow value, in accordance with clause6
6.2 Procedure of EN1015-3:1998 at intervals of 15min.
Fill sufficient moulds with test mortar and any control During the test period keep the mortar in a bucket,
mix to provide adequate area of surface for the covered with a moist cloth, and stored in air at a
–
required number of penetrations of the rod. Fill each temperature of 208C 28C. Before each test the mortar
mould in about 10 increments, minimizing excess mix may be given an additional mixing by hand.
mortar to be struck off, and tapping the mould on the 7.3 Calculation and expression of results
bench four times after each increment. Strike off the
Determine the time in minutes, rounded to the nearest
surface plane and level with the top of the mould using
minute and measured from the time of completion of
a palette knife.
the mixing, that the flow value of the mortar differs by
Store the filled moulds in air at a temperature of 30mm from the initial flow value determined 10min
–
208C 28C and a relative humidity of not less than after mixing, by interpolation of the results
95%, e.g.in a sealed polyethylene bag. immediately below and above this figure.
Place a mould on the scale under the penetration rod Calculate the mean value from the individual values of
so that the portion of the sample surface immediately each mortar test sample, all values rounded to the
beneath the rod is at least 20mm from the rim of the nearest minute. The mean value is the workable life of
mould or from the position of any previous themortar.
penetrations. Adjust the tare device or record the mass
of the filled mould. By means of the lever on the drill
8 MethodC— Correction time of
stand, lower the penetration rod slowly into the sample
until the loose washer just touches the surface (see thin-layer mortar
Figure1).
8.1 Principle
Note the reading of the scale in kilograms. Correct this
The correction time is measured by the time in
reading,if necessary, for the mass of the filled mould,
minutes at which 50% of the contact surface of a cube,
and then divide it by3 to express the resistance to
penetration in N/mm2. placed on a layer of mortar applied on the specified
masonry unit substrate, and then removed, is covered
For a non-retarded mortar measure the resistance to
with adhering mortar.
penetration at intervals of 15min, starting at 30min
The method is not applicable where perforated
before the declared workable life, until it exceeds the
masonry units are being used.
prescribed limit of resistance (see6.3).
For retarded mortars, check the penetration 8.2 Procedure
intermittently,atconvenient times, until the resistance Cut cubes with dimensions 50mm350mm350mm
starts to increase, then proceed as described above. from the specified masonry units ensuring that the face
to be used as the contact face is one from the original
6.3 Calculation and expression of results.
bed face.
Measure the workable life from the completion of
Before performing the test, dry the prescribed masonry
either the addition of water to the dry constituents, or
units and cubes in an oven at the temperature shown
the addition of cement or gypsum to a wet mix of lime
in Table1.
and/or sand as follows.
(cid:211) BSI11-1999
Page 5
EN 1015-9:1999
Table 1— Drying temperatures for masonry 9 Test report
units and cube specimens
The test report shall include the following information:
Masonryunitmaterial Drying a) the number, title and date of issue of this
temperature
European Standard;
8C
b) the place, date and time of taking the bulk test
Clay 105– 5 sample1);
Calcium silicate NOTE Thisisthesampletakenfromthebulksupplythatisto
beusedforallofthetestsinEN1015.
Autoclaved aerated concrete
c) the method used for taking the bulk test sample
–
Natural stone 70 5 (if known) and the name of the organization that
took it;
Aggregate concrete
d) the type, origin and designation of the mortar by
Manufactured stone
reference to the relevant part of prEN998;
–
Masonry units with organic constituents 60 5
e) the date and time of testing;
f) preparation (mixing, casting) and storage (curing)
Consider the masonry units to have reached constant
conditions;
mass if two consecutive weighings, two hours apart
during the drying, do not differ by more than 0,2% of g) the date and time of preparing samples for test
their mass. Then condition the masonry units by (i.e.date and time of any mixing, casting, moulding,
– –
storage in air of temperature 208C 28C and 65% 5% or demoulding procedure, if appropriate);
relative humidity for two days. h) type and description of any substrate in
–
Carry out the test at an air temperature of 208C 28C accordance with the relevant part of prEN771 and
–
and 65% 5% relative humidity, by the following the initial rate of water absorption, if known;
procedure. i) initial flow value of test mortar in accordance with
a) Apply the thin-layer mortar with a trowel to the EN1015-3;
contact surface (bed face) of the masonry unit j) age of mortar when tested;
substrates and immediately sweep off.
k) total mass of each individual test sample;
b) Apply a 2mm to 3mm layer of thin-layer mortar
l) test method used (MethodA— Workable life of
to the surface of the substrate pre-treated as
general purpose mortar, MethodB— Workable life
described ina).
of thin-layer mortar or MethodC— Correction time
c) Place a cube with contact face (derived from a of thin-layer mortar), and reference limit value of
bed face) on the mortar layer and keep it there for workable life;
30s by applying to it a load of 1,2kg in the case of
m) test results (individual values and mean value of
masonry units with a density $1000kg/m3 and a
the workable life of general purpose mortar rounded
load of 0,5kg in the case of masonry units with a
to the nearest minute; individual values and the
density <1000kg/m3.
mean value of the workable life and the correction
d) Remove the cube perpendicularly from the bed time of thin-layer mortar rounded to the nearest
surface and determine the percentage area of the minute);
contact surface on the cube covered with adhering
n) remarks,ifany.
mortar to the nearest 10%.
e) Repeatc) andd) at intervals of 1min using a
fresh cube until 50% of the contact surface of a
cube is covered with adhering mortar, and record
each interval and corresponding percentage area of
covered surface. Record the time in minutes. Repeat
the procedurea) toe).
NOTE Eachtimeacubeisplacedonthemasonryunititshould
beatleast20mmawayfromthesitewherecubeswereplaced
previously.
8.3 Calculation and expression of results
Calculate the mean value from the individual values of
each mortar sample, all values rounded to the nearest
minute. The mean value is the correction time of the
mortar.
1)Thisinformationiscontainedonthecertificateofsampling(seeEN1015-2).
(cid:211) BSI11-1999
Page 6
EN 1015-9:1999
Dimensionsinmillimetres
Key: 1 Drillstand(levertype) 2 Washer
3 Penetrationrod 4 Mould(orcontainer) 5 Weighinginstrument(see4.1.1)
6 50mmto100mm
Figure 1— Apparatus for the determination of workable life
(cid:211) BSI11-1999
blank
BS EN
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1015-9:1999 |
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