BS EN BRITISH STANDARD National foreword This British Standard is the UK implementation of EN This publication does not. Find the most up-to-date version of BS EN at Engineering PREN Draft BS EN Testing fresh concrete. Part 8: Self- compacting concrete – Slump-flow test.
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BS EN 12350-8:2010
As the voice of the U. Customer Services If you need international and foreign standards from other Standards Development Bss 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publication of an identical text or by endorsement, at the latest by Januaryand conflicting national standards shall be withdrawn at the latest by January It is based on the slump test described in EN If cement or concrete enters the eye, immediately wash it out thoroughly with clean water and seek medical treatment without delay.
When the cone is withdrawn upwards the time from commencing upward movement of the cone to when the concrete has sn to a diameter of mm is measured; this is the t time. Organizations of all sizes and across all sectors choose standards to help Copyright them achieve their goals.
Your Alert Profile lists the documents that will be monitored. Place the cone centrally within the mm circle on the baseplate and hold in position by standing on the foot pieces or use the collarensuring that no concrete can leak from under the cone.
According to the results from this EU project, it seems no single test method can completely cover all three key properties. Please first verify your email sb subscribing to alerts.
ENTesting fresh concrete, consists of the following parts: The surface shall not be readily attacked by cement paste or be liable to rusting.
The test is not suitable when the maximum size of the aggregate exceeds 40 mm. The resulting values for r and R are given in Tables 1 and 2. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. Check the top surface for horizontality using the 1235-08 level. This European Standard specifies the procedure for determining the slump-flow and t time for self-compacting concrete. Nevertheless any test method should at least be correlated to the practical situation and give consistent results in order to fn reliable data for judgment of concrete workability.
Users are responsible for its correct application. The result e an indication of the filling ability of self-compacting concrete. If you find an inaccuracy or ambiguity within a British Standard or other The knowledge embodied in our standards has been carefully assembled in BSI publication please inform the Knowledge Centre. Up-to-date lists and bibliographical references ns such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
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BS EN – Testing fresh concrete. Self-compacting concrete. Slump-flow test
Wash wet concrete off the skin immediately. The plate shall have a flat, smooth surface. The largest diameter of the flow spread of the concrete and the diameter of the spread at right angles to it are then measured and the mean is e slump-flow.
The deviation from flatness shall not exceed 3 mm at any point when a straight edge is placed between opposing sides and corners. For dated references, only the edition cited applies. E worldwide for CEN national Members. For undated references, the latest edition of the referenced document including any amendments applies. We have no document history for this standard.
Dimensions in millimetres Figure 1 — Baseplate Dimensions in millimetres Figure 2 — Example of dimensions of a steelweighted collar 5 Test sample The sample shall be obtained in accordance with EN All the data, software and documentation set out in all British Standards and Information on standards other BSI publications are the property of and copyrighted by BSI, or some person or entity that owns copyright in the information used such as the international We can provide you with the knowledge that your organization needs standardization bodies and has formally licensed such information to BSI for to succeed.
If the t time has been requested, start the stop watch immediately the cone ceases to be in contact with the baseplate and record the time taken to the nearest 0,1 s for the concrete to first touch the mm circle After the flow of concrete has stabilized without disturbing the baseplate or concrete, measure the largest diameter of the flow spread and record as d1 to the nearest 10 mm.
Allow the filled cone to stand for not more than 30 s; during this time remove any spilled concrete from the baseplate. Need more than one copy? Prevent skin contact with wet cement or concrete by wearing suitable protective clothing. Lift gs cone vertically in 1 s to 3 s in one movement without interfering with the flow of concrete.
If the difference 1 2 between d and d is greater than 50 mm another sample shall be taken and the procedure repeated. BSI is incorporated by Royal Charter. A list of organizations represented on this committee can be obtained on request to its secretary.
Fit the collar to the cone if being used. The construction of the plate shall be such as to prevent distortion. About us Revisions We bring together business, industry, government, consumers, innovators Our British Standards and other publications are updated by amendment or revision. This standard is one of a series concerned with testing fresh concrete.
The t time is a measure of the speed of flow and an indication of the relative viscosity of the self-compacting concrete. If the document is revised or amended, you will be notified by email. Check the concrete spread for signs of segregation and report under item 8, f in a qualitative b, e.
These should address three key properties: Fill the cone in one operation without any agitation or mechanical compaction, and strike off surplus from the top of the cone. Then measure the diameter of the flow spread at right angles to d to the nearest 10 mm and record as d to the nearest 10 mm. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
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