BSI Standards Publication. Testing concrete – Part Methods for analysis of hardened concrete. BS pdf free download. Testing concrete — Part Guide to the use of non-destructive methods of test for hardened concrete. BS pdf free download. BS Reprinted, incorporating. Amendments No. 1 and. No. 2. Testing concrete —. Part Method for determination of compressive strength of.

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Bs 1881 Pdf

BS Part UDC British Standard. Testing concrete. Part Method for determination of water absorption. Essais du. Concrete temperature of °C and initial slump (BS Part ) of 75mm were compressive strength (BS Part ) at 7 and 28 days. BS - Download as PDF File .pdf), Text File .txt) or read online.

What is this standard about? It provides a way to test the water absorption of concrete. Who is this standard for? Manufacturers and users of concrete Designers, engineers, architects Regulatory bodies Why should you use this standard? It specifies a method for determining the water absorption of concrete specimens cored from a structure or a precast component. The method may also be used to determine the water absorption of concrete cast into prisms or cylinders where the surface to volume ratio can be calculated and where no point in the specimen is more than 50 mm from a free surface. The measured water absorption of the specimen is corrected to that equivalent to a surface to volume ratio of a core 75 mm long with a diameter of 75 mm. NOTE: Absorption values for cast specimens are normally slightly lower than those for a core from the same concrete but the difference can be more significant if the aggregate is absorbent. This part of BS is a technical revision superseding BS which is withdrawn. Standard Number.

Ensure use of the most current version of this document by searching British Standards Online at bsonline. The density test has been revised to distinguish between the procedures required to obtain the density of as-received, saturated or oven-dried specimens. No estimate of repeatability or reproducibility is given in this Part of this standard. Reference should be made to BS for further information on the determination of repeatability and reproducibility.

A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This standard has been updated see copyright date and may have had amendments incorporated.

This will be indicated in the amendment table on the inside front cover. For use in clause The volume of the specimen shall be not less than 40 d3, where d is the nominal maximum size of 3 Density the aggregate. If the shape or size of the sample is Density r is the mass of a unit volume of hardened such that it is not possible to use all of it, a smaller Licensed Copy: Gibb Limited, Jacobs Gibb Ltd, 24 December , Uncontrolled Copy, c BSI concrete expressed in kilograms per cubic metre.

Only regular shaped specimens shall be measured for the calculation of volume. Calculate the average length NOTE Determination of the volume by water displacement is and diameter from each of the four measurements preferred. Calculate the average for of 0. Some suitable types of stirrup each of the four measurements and calculate the are shown in Figure 1.

For use in clauses 7, 8, 9 volume V1 of the specimen in m3. For the national standard of mass. The balance shall be cylinders, confirm that the moulded diameter and checked after relocation or disturbance. Fully immerse the specimen in 7.

Place the specimen on the specimen in air. Before each weighing, wipe off stirrup 4. Ensure that the stirrup does not touch Record the constant mass m2 in kg. Licensed Copy: Gibb Limited, Jacobs Gibb Ltd, 24 December , Uncontrolled Copy, c BSI the bottom of the tank and that air bubbles are not Specimens cured in water in accordance with trapped on the surfaces of the specimen and the BS for more than 3 days immediately stirrup.

Weigh the completely immersed specimen prior to testing may be assumed to be saturated to a and record its apparent mass mw in kg , correcting constant mass for this test.

Determine the volume of the weighed immersed in water to the same depth as specimen V1 or V2 in m3 by calculation in when holding the specimen. Immediately remove accordance with clause 6. Alternatively, determine the specimen from the stirrup, and after wiping off the volume V3 in m3 by the water displacement surplus water from the surfaces using a moist cloth, method in accordance with clause 7. Calculate the weigh in air and record its mass ma in kg. Weigh the specimen as-received in oven-dried density air and record its mass m1 in kg.

Place the specimen in the 8. Determine the volumes of the ventilated oven 4. Alternatively, determine measurements, 24 h apart, giving a difference of less the volume V3 in m3 by the water displacement than 0.

Before method, in accordance with clause 7. Calculate the each weighing, cool the specimen to near room as-received density using the appropriate formula: temperature in a dry airtight vessel or desiccator. Record the constant mass m3 in kg.

Determine the volume of the Table 1 — Precision data for measurements of specimen, V1 or V2 in m3 , by calculation in the saturated density of hardened concrete accordance with clause 6. Alternatively, determine Test method Repeatability Reproducibility the volume V3 in m3 by the water displacement conditions conditions method in accordance with clause 7.

July Amendments issued since publication First revision. Uncontrolled Copy. January Amd. Laboratory humidity ovens non-injection type. The tests do not apply to concrete whose nominal maximum aggregate size exceeds 40 mm. Performance requirements for electrically-heated laboratory drying Licensed copy: It has been found that the results are closely related to those obtained by the procedure given in BS for the water absorption test and to weight loss during freezing and thawing tests.

The test has been included in the standard because it is non-destructive and has the particular advantage that measurements can be taken on the surface of site concrete by a procedure which incorporates specified modifications of the general requirements for testing oven dried specimens.

Thus it is possible to provide uniformity in the methods of making and recording the tests carried out on the concrete.

The standard has been revised under the authority of the Cement. Precast concrete blocks. The Catalogue may be consulted in many public libraries and similar institutions.

Parts onward contain methods of test and Parts onwards contain recommendations for non-destructive tests.

BS 1881-124:2015 pdf free download

Laboratory humidity ovens injection type. Clause 6 describes a method of determining the initial surface absorption of concrete which has been developed by the British Precast Concrete Federation. Information on any other methods of test that are thought to be suitable for extensive use. Graduated measuring cylinders. Portland cement ordinary and rapid-hardening. The standard has been largely revised.

The purpose of this British Standard is to provide suitable methods for testing concrete. Lime and Gypsum Products Industry Standards Committee in the light of experience gained in carrying out the tests described in the first edition published in and in order to expand its scope to cover additional methods of testing concrete. High alumina cement.

This standard makes reference to the following British Standards: Methods for calibration and grading of extensometers for testing of metals. Values thus expressed are. There is no intention.

BS1881 Part 116.pdf

For the control of temperature conditions in testing laboratories situated in tropical climates. This will be indicated in the amendment table on the inside front cover.

Users of British Standards are responsible for their correct application. Apparatus for tests which have not appeared previously in the standard are given in terms of rounded metric values which generally do not relate to any inch sizes. Summary of pages This document comprises a front cover. Apparatus for tests included in the original edition is specified solely in terms of rounded metric values.

Compliance with a British Standard does not of itself confer immunity from legal obligations. When tests specified in this standard are carried out in such climates. This standard has been updated see copyright date and may have had amendments incorporated.

In view of the change to metric in industry. A British Standard does not purport to include all the necessary provisions of a contract. Clause 6 specifies the method for determining the 6. The sample shall be 6. A length of precision bore glass capillary tubing. A suitable cap for testing vertical surfaces Clause 3 Text deleted is illustrated in Figure 8.

Clause 4 Text deleted 6. NOTE 3 High alumina cement concrete should not be oven end of the scale and this end shall be provided with dried. The cap Figure 1 — Figure deleted shall be fixed to the test position as described in 6. For the purposes of this clause. It is. When the sample has is at the highest part of the cap to allow all trapped reached constant weight it shall be placed in a air to escape.

By constant weight is reservoir 6. A well ventilated drying oven complying initial surface absorption with BS The outlet shall be so positioned that it any 24 h drying period. A dry airtight vessel.

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NOTE If plastics material is selected a clear acrylic. One having excessive porosity or honeycombing. The Figure 2 — Figure deleted reservoir shall comply with the following Clause 5 Text deleted requirements: Figure 3 — Figure deleted 1 it shall be a funnel made of glass or plastics of Figure 4 — Figure deleted about mm diameter.

Licensed copy: The distilled or de-ionized water to the specified level. At the same instant which no water has fallen onto the test surface. A measuring cylinder of 10 ml capacity conforming to the requirements of BS shall be used for the purpose of collecting where: The tap shall be opened and when a steady discharge occurs the measuring 6. The tube shall be flushed three recordings shall be calculated. The time required to 6.

The length The procedure described in the previous paragraph of the capillary tube shall be measured and recorded shall be repeated twice more and the average of the to the nearest millimetre. The millimetres. The surface cylinder shall be placed under the open end and shall be tested after a period of at least 48 h during collection of the water begun. The material shall be firmly completely filled with water. If the end of the capillary tube can be raised to avoid movement over the 5 period exceeds 30 scale units overflow of the water between taking readings the initial surface absorption shall be recorded as see 6.

If any leakage. In laboratory tests from the values below: Number of scale units Period during which movement moved in 5 s is noted 6. The colour may be selected capillary tube the stop watch shall be started. After 5 s the number of scale units the water has The cap shall then be clamped into position or fixed moved shall be noted and. The outlet tubing Licensed copy:

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