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Copyright by the BSI, Fri Sep 21 , Uncontrolled Copy. En Aggregate for Concrete. BS Specification for the procedures to be used in sampling, testing and assessing compliance of aracer.mobi A Summary of Changes to Aggregate Specifications in Test methods British Standard BS EN UK Guidance BS EN General BS EN Geometrical BS EN but only within the UK. Recommended test sieves for use in the UK with BS EN aggregate standards 80 63 40 View T1 BS pdf from CEE CSE at The Hong Kong Polytechnic University. BRITISH STANDARD Specification for aggregates from natural sources for.

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Bs 882 Pdf

BS , incorporating Amendment no. 1. BS Part British Standards can be obtained in PDF or hard copy formats from the BSI online. r HSAAMHSAAM · Bsagg-for-natural-sources-for-concre HSAAMHSAAM · Bs aggregates from natural sources. bs pdf pdf ebooks download pdfsebook BS This British Standard FINE AGGREGATES 1 The gradation of fine aggregate shall be in accordance.

This preview shows page 1 - 9 out of 9 pages. Subscribe to view the full document. This standard supersedes BS : , which is Withdrawn. New grading requirements are introduced for coarse aggregates containing 2 mm to 10 mm fractions with the inclusion of limits for material passing a 14 mm sieve. This ensures a reasonable fraction of the aggregate will be retained between the 20 mm and 14 mm sieves and eliminates the anomaly that some nominal 14 mm aggregates previously complied with the 20 mm grading requirements. The difference in results for mechanical properties dependent on the moisture condition of the aggregate is eliminated by linking limits to tests on oven—dry materials. Attention is also drawn to the importance of performance characteristics where doubt exists in place of fixing particular limits for fines contents. The appendices give further consideration to provision of information by the supplier and advice on user concerns. Appendix A is expanded to include provision of information on request from tests in accordance with BS for acid soluble sulphate contents and drying shrinkage. Additionally in several cases the time period is reduced from which test results are to be provided. Finally appendix C includes tighter guideline limits on chloride content in the total combined aggregate whilst stressing the need to calculate the chloride content of the concrete mix from the total of the measured values for each of the constituents. Compliance with a British Standard does not of itself confer immunity from legal obligations. BS z — Specification 0 Introduction When specifying aggregates in compliance with this standard, there may be a need to specify or approve certain additional quality requirements or narrower grading limits within one of those in table 4 for sands, to suit special applications, for example, the production of concrete having an especially fine finish or suitable for very severe conditions of exposure. Certain machine—formed concrete or precast products may also require aggregate gradings outside those given in tables 3, 4 and 5.

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Agrigates From natural sources of concrete (BS-882)

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No notes for slide. You just clipped your first slide! Certain machine-formed concrete or precast products may also require aggregate gradings outside those given in Table 3, Table 4 and Table 5. In these cases appropriate grading should be agreed between the purchaser and the supplier. When narrower grading limits are required, sands should be obtained from sources which demonstrate from test data no more variability than a grading width see Appendix A. Guidance is given in Appendix B on special factors to be considered in the selection of aggregates for which limits cannot be specified and determined by testing the aggregate itself in accordance with an accepted method of test.

Guidance on chloride content is given in Appendix C. Consideration of the nature of the aggregate and its source will normally indicate which characteristics will need periodic examination, particularly in respect of those properties for which different requirements are given for specific uses. The suitability of an aggregate for the required use can be assessed initially by reference to data provided by the supplier in accordance with Appendix A. Some variation in the measured quality of material from any source can be expected due to sampling and testing in addition to the variability of the material itself.

BS 882:1992 pdf free download

Data provided in accordance with Appendix A may not be strictly applicable to the material in a single sample or consignment.

Certain machine—formed concrete or precast products may also require aggregate gradings outside those given in tables 3, 4 and 5. In these cases appropriate grading should be agreed between the purchaser and the supplier. When narrower grading limits are required, sands should be obtained from sources which demonstrate from test data no more variability than a grading width see appendix A.

Guidance is given in appendix B on special factors to be considered in the selection of aggregates for which limits cannot be specified and determined by testing the aggregate itself in accordance with an accepted method of test. Guidance on Chloride content is given in appendix C. In general it will not be necessary to test each aggregate for all of the requirements specified in this standard.

Consideration of the nature of the aggregate and its source will normally indicate which characteristics will need periodic examination, particularly in respect of those properties for which different requirements are given for specific uses.

The suitability of an aggregate for the required use can be assessed initially by reference to data provided by the supplier in accordance with appendix A.

Some variation in the measured quality of material from any source can be expected due to sampling and testing in addition to the variability of the material itself.

Data provided in accordance with appendix A may not be strictly applicable to the material in a single sample or consignment. For lightweight aggregates, see BS The titles of the publications referred to in this standard are listed on the inside back cover. Coarse aggregate may be described as gravel uncrushed, crushed or partially crushed as defined in 2.

Sand may be described as uncrushed or partially crushed as defined in 2. BS : E 2. It may be produced without separating into coarse and fine fractions, or it may be produced by combining coarse aggregate and sand. Aggregate supplied as a mixture of different sizes or types shall be proportioned and mixed in such a way as to ensure reasonable consistency.

crushing value of coarse aggregates bs part

Layer loading of lorries with different sizes or types of materials 18 unlikely to give the required consistency. For special circumstances, e. Information on the general factors affecting durability of concrete is given in BS : Part 1 and BS Table 1. The oven-dry aggregate impact value shall not exceed the appropriate value given in table 2. Table 2.

O 25 Type of concrete Heavy duty. BS : Part 1 and BS : Part 1 give guidance on the acid soluble sulphate content of the concrete from all mix constituents.

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