BS1881-131 1998
BS1881-131 1998
BS1881-131 1998
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ICS 91.100.10 |
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NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW
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BS 1881 : Part 131 : 1998
Contents
Page
Committees responsible Inside front cover
Foreword ii
Method
1 Scope 1
2 References 1
3 Definitions 1
4 Principle 1
Licensed Copy: Giorgio Cavalieri, ALSTOM, 9-Mar-01, Uncontrolled Copy. BSI
BSI 07-1999 i
BS 1881 : Part 131 : 1998
Foreword
Summary of pages
This document contains a front cover, an inside front cover, pages i and ii, pages 1 to
10, an inside back cover and a back cover.
| The BSI copyright notice displayed throughout this document indicates when the
| document was last issued.
ii BSI 07-1999
BS 1881 : Part 131 : 1998
Method
2.1 Normative references 5.4 Slump rod, conforming to BS 1881 : Part 102.
This British Standard incorporates, by dated or 5.5 Slump baseplate, conforming to BS 1881 :
undated reference, provisions from other Part 102.
publications. These normative references are made
5.6 Slump scoop, conforming to BS 1881 : Part 102.
at the appropriate places in the text and the cited
publications are listed on the inside back cover. For 5.7 Trowel, having a cast steel blade.
dated references, only the edition cited applies; any NOTE. A suitable type is shown in figure 2.
subsequent amendments to or revisions of the
publications apply to this British Standard only when 5.8 Compacting equipment, either a compacting
incorporated in the reference by amendment or bar, a vibrating hammer or a vibrating table in
revision. For undated references, the latest edition of accordance with 3.3 of BS 1881 : Part 108 : 1983.
the cited publication applies, together with any 5.9 Curing tank, conforming to BS 1881 : Part 111.
amendments. NOTE. Specimens made with high alumina or super sulfated
cements should not be placed in the same tank as specimens
2.2 Informative references made with Portland cements.
This British Standard refers to other publications
that provide information or guidance. Editions of 5.10 Balance, capable of weighing to the
these publications current at the time of issue of this nearest 1 g.
standard are listed on the inside back cover, but 5.11 Compression testing machine, of suitable
reference should be made to the latest editions. capacity for the test conforming to BS 1881 :
Part 115.
3 Definitions NOTE. The lower limit of verification for the scale range used
should be below the expected maximum load on any specimen
For the purposes of this standard the definitions tested on the scale range.
given in BS 1881 : Part 102, Part 108, Part 111,
Part 114, Part 115, Part 116 and Part 125 apply. 5.12 Coarse aggregate, conforming to the
requirements of annex A.
BSI 07-1999 1
BS 1881 : Part 131 : 1998
2 BSI 07-1999
BS 1881 : Part 131 : 1998
BSI 07-1999 3
BS 1881 : Part 131 : 1998
Table 4. Dimensions
A B1) C D E F1 F2 G J K L a1 a2 f
mm mm mm mm mm mm mm mm mm mm mm 8 8 8
450 220 150 155 60 5 5 2 2 2 2 65 95 165 65 120 15
1)
260 required for 12 cube batches.
NOTE. Where tolerances are not given, sizes indicated are for guidance only and are not critical.
4 BSI 07-1999
BS 1881 : Part 131 : 1998
1.5 0.5
Cast steel
blade
Licensed Copy: Giorgio Cavalieri, ALSTOM, 9-Mar-01, Uncontrolled Copy. BSI
200 10
90 15
BSI 07-1999 5
BS 1881 : Part 131 : 1998
6 BSI 07-1999
BS 1881 : Part 131 : 1998
BSI 07-1999 7
BS 1881 : Part 131 : 1998
B.5.6.3 Preparation of mortar with addition of B.6 Calculation and expression of results
air-detraining agent
B.6.1 Calculate the air content A, to the nearest 0.1 %,
Prepare and test this mortar mix immediately after of each sample of mortar using the following equation:
completion of the preparation and testing of the mortar
mix using the sand as received (see B.5.6.2). Follow m 1)
A = 100 2 0.04336
the procedure specified in B.5.6.1, except that 1.0 ml V
of the air-detraining agent is added from a burette, B.6.2 Calculate the average difference in air content
syringe or suitable pipette directly to the water in the between the samples without, and the samples with,
mixing bowl before the cement is added. Ensure all air detraining agent.
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Figure B.1 Grading of sand fractions for concrete cubes
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1) The factor 0.04336 is based on a density of 3130 kg/m3 for the cement and 2650 kg/m3 for the sand.
8 BSI 07-1999
BS 1881 : Part 131 : 1998
Annex C (informative)
Alternative mixing
C.1 Place the weighed materials in the mixer pan in
the following order: sand, cement, coarse aggregate.
Have the mixing water ready and start the mixer.
After 15 s add the water uniformly during the next 15 s;
then continue mixing for a total time of (180 5) s.
Stop the machine and turn the concrete over in the
Licensed Copy: Giorgio Cavalieri, ALSTOM, 9-Mar-01, Uncontrolled Copy. BSI
BSI 07-1999 9
Licensed Copy: Giorgio Cavalieri, ALSTOM, 9-Mar-01, Uncontrolled Copy. BSI
blank
10
BS 1881 : Part 131 : 1998
Normative references
BSI publications
BRITISH STANDARDS INSTITUTION, London
Informative references
BSI publications
BRITISH STANDARDS INSTITUTION, London
BSI 07-1999
BS 1881 : |
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Part 131 : 1998 |
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BSI British Standards Institution
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| BSI is the independent national body responsible for preparing British Standards. It
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| presents the UK view on standards in Europe and at the international level. It is
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| would be grateful if anyone finding an inaccuracy or ambiguity while using this