Where required, the specification of a maximum time between placing layers of concrete should take account of the likely temperature of the concrete, cement type, mix proportions, the use of admixtures with set retarding properties and consistency of the concrete. Each sample shall be accompanied by a report from the person responsible for taking the sample. You are commenting using your Facebook account.
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BS EN 12350-1:2009
Minimum size 123501 sample x 1. Marking The test specimens shall be marked clearly and indelibly, without damaging the specimen using a cub tag that contains the information related to the specimen Casting date, ticket number, specimen ID, location of sampling….
Click to learn more. Find Similar Items This product falls into the following categories. This website is best viewed with browser version of up to Microsoft E Explorer 8 or Firefox 3. For this to occur the delay should be sufficient for the lower layer to develop an initial set or harden. Now, if the placement of concrete goes beyond these waived time limit, the concrete should be rejected.
Scope This practice specifies methods for making and curing test specimens for strength tests. Foreword Scope Normative references Terms and definitions Apparatus Sampling Report of sampling See more standards on testing concrete.
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BS EN - Testing fresh concrete. Sampling – BSI British Standards
Sampling Concrete It is acceptable to measure the temperature in: Contents of BS EN You are commenting using your Twitter account. Customers who bought this product also bought BS EN Specifies two procedures for sampling fresh concrete: When mixing and sampling of concrete is done in a laboratory, different procedures 123350-1 be required.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Apparatus Mold Mold use for slump test of fresh concrete Dimension in mm Metallic, Frustum of a cone Alternative materials are allowed if requirements are met comparability tests Tamping Rod Round, straight steel rod, length mm and diameter 16mm Tamping end rounded to a hemispherical tip Measuring Device Ruler Marked in increments 12350--1 5 mm or smaller Length of at least mm In addition, a scoop is needed.
In the case of self-compacting concrete, the mould shall be filled in one operation and no mechanical 1235-01 shall be applied during filling or after the mould is filled.
Sampling of Freshly Mixed Concrete at the Field (BS EN ) – QA/QC Construction
Take the scoopfuls of concrete through the moving stream from the truck mixer. Scoopfuls are taken from four different parts of the load to form the 123501 sample. The requirement for remixing the sample before tests on the fresh concrete, or before making test specimens, is included in the relevant standards.
Surface leveling Remove the excess concrete rn the upper edge of the mould using the steel trowel or float and carefully level the surface. The report shall include: This standard is not included in any packages.
Compaction of the concrete The concrete shall be compacted immediately after placing in the moulds in such a way as to produce full compaction of the concrete with neither excessive segregation nor laitance. Mechanical vibration using Compacting with an internal vibrator Apply the vibration for the minimum duration necessary to achieve full compaction of the concrete.
Quantity at least 1. In some big projects, imagine the time consumed to perform the composite sampling when there is a lot of concrete truck mixers in queue at the checkpoint area.