BS Part BS Part BS EN to 3 & 5 to 7: BS EN BS EN to BS EN Specifies two procedures for sampling fresh concrete: composite and spot sampling. Document History. Supersedes BS EN Related products by. said in BS EN , take a few samples throughout the pour for the best representation of the batch and make sure you take % of what you think you’ll .
|Published (Last):||14 July 2010|
|PDF File Size:||16.23 Mb|
|ePub File Size:||5.2 Mb|
|Price:||Free* [*Free Regsitration Required]|
BS EN 12350-1/BS EN 12350-2/BS EN 12390-2/BS EN 12390-2
bs en 12350-1 Create a website or blog at WordPress. The report shall include: Subject the concrete to a sufficient number of strokes per layer, typically Scoopfuls are taken from four different parts of the load to form the standard sample.
The first school of thought is rather straightforward: Compacting by hand with compacting rod or bar Distribute the strokes in a uniform manner over the cross-section of the mould. Fill the mold in three layers of approximately equal bs en 12350-1.
Search all products by.
Sampling of Freshly Mixed Concrete at the Field (BS EN ) – QA/QC Construction
Leave the TMD in the concrete a minimum of 2 min. If the tamping operation of the top layer results in subsidence of the concrete below the top edge of the mould, add more concrete to keep an excess above the top of the mould at all times. Extended delays in placing can lead to a significant loss of bs en 12350-1 with time making it impossible to place with satisfactory bs en 12350-1. Immediately measure the vertical difference between the height of the mould and that of the highest point of the slumped test specimen.
The vertical distance between the height of the bs en 12350-1 and the highest point is measured and recorded as the slump in mm.
Composite samples are not required if the only purpose of obtaining the sample is to determine the temperature. Depending on the consistency of the concrete and the method of compaction, moulds shall be filled in one or more layers to achieve full compaction.
By continuing to use this website, you agree to bs en 12350-1 use. Records shall be kept to ensure the traceability of the specimen from sampling to testing. Take the smart route to manage medical device compliance. You are commenting using your Twitter account. You are commenting using your Facebook account.
See more standards on testing concrete. Thank you for another wonderful post. Surface leveling Bs en 12350-1 the excess concrete above the upper edge of the mould using the steel trowel or float and carefully level the surface. What is the time limit before placing of fresh concrete?
Ideally placing subsequent layers of fresh concrete should be undertaken as soon as practical to enable a fully compacted and monolithic element. As the load is discharged, sampling bs en 12350-1 be taken from the whole width and depth not just the top part. Protect the sample from the sun, wind, and other sources of rapid evaporation, and from contamination.
The time for this to occur depends on the concrete temperature, cement bs en 12350-1, mix proportions, the use of admixtures with set retarding properties and consistency of the concrete. A sample of concrete is placed in a mold, shaped as the frustum of a cone, and compacted.
Half bs en 12350-1 the strokes near perimeter, and then progressing with vertical strokes spirally toward the center. Foreword Scope Normative references Terms and definitions Apparatus Sampling Report of sampling See more standards on testing concrete. Marking The test specimens bs en 12350-1 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 bs en 12350-1 sampling….
The Location of concrete represented The Time of casting Compacting Methods Internal Vibrators that will be used should have 12350-11 following specs: This is a very classical question raised by many graduate engineers.
It may be used to verify conformance to a specified requirement for the temperature of concrete. Quantity at least 1. Procedure for Slump Test. Move the scoop around the perimeter of bs en 12350-1 mold to ensure even distribution of material and minimize segregation.
BS EN – Testing fresh concrete. Sampling – BSI British Standards
Procedure for Slump Test Apparatus being readied for slump test activity Fill the mold in three layers of approximately equal height. 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 Bs en 12350-1 Marked in increments of 5 mm or smaller Length of at least mm In addition, a scoop is needed.
Transport of test specimens Avoid loss of moisture and deviations from the bs en 12350-1 temperature at all stages of transport. Scope This practice specifies methods bs en 12350-1 making and curing test specimens for strength tests. Learn more about the cookies we use and how to change your settings. Mechanical vibration with vibrating table Apply the vibration for the minimum duration necessary to achieve full compaction of the concrete.
Record the date and time of sampling. These limits are sufficient for normal UK temperatures. Significance and Use The slump test was originally developed to provide a technique to monitor the consistency of unhardened concrete.