Testing fresh concrete - Part 8: Self-compacting concrete - Slump-flow test

The document specifies the procedure for determining the slump-flow and t500 time for self-compacting concrete. The test is not suitable when the maximum size of the aggregate exceeds 40 mm.

Prüfung von Frischbeton - Teil 8: Selbstverdichtender Beton - Setzfließversuch

Essai pour béton frais - Partie 8: Béton auto-plaçant - Essai d'étalement au cône d'Abrams

Preskušanje svežega betona - 8. del: Samozgoščevalni beton - Preskus razleza s posedom

General Information

Status
Not Published
Public Enquiry End Date
27-Feb-2008
Current Stage
98 - Abandoned project (Adopted Project)
Start Date
20-Dec-2010
Due Date
25-Dec-2010
Completion Date
20-Dec-2010

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Effective Date
01-Dec-2010

Overview

oSIST prEN 12350-8:2008 specifies the method for testing the workability of self-compacting concrete (SCC) using the slump-flow test. This procedure determines two vital parameters: the slump-flow (the spread diameter of concrete) and the t500 time (the time taken for the spread to reach 500 mm), providing a clear assessment of SCC’s flowability and viscosity. The test is applicable to SCC mixes with a maximum aggregate size not exceeding 40 mm.

The slump-flow test plays a crucial role in ensuring SCC can fill formworks and encase reinforcement entirely, without the need for vibration, supporting better quality and efficiency in modern construction.

Key Topics

  • Purpose of the Test:
    • Measures the flowability and filling ability of fresh self-compacting concrete.
    • Evaluates the relative viscosity through the t500 time.
  • Test Apparatus:
    • Uses a slump cone, flat baseplate marked with circles and cross lines, measuring tape, spirit level, and stopwatch.
    • Optional weighted collar for single-operator use.
  • Procedure Highlights:
    • The cone is filled, struck off, and lifted to let concrete flow freely.
    • Diameters of flow are measured at two perpendicular angles.
    • The average provides the slump-flow; the t500 time is the moment the spread reaches 500 mm.
  • Result Reporting:
    • Includes slump-flow (nearest 10 mm), t500 time (nearest 0.5 s if measured), test conditions, and any observed segregation.
  • Limitations:
    • Not suitable for concrete mixes with aggregate size over 40 mm.
    • Must ensure the flatness and cleanliness of the test plate for accurate results.

Applications

The slump-flow test for self-compacting concrete is extensively used across the construction industry to:

  • Assess SCC Quality: Verifies the consistency, filling ability, and flow characteristics prior to placement, reducing the risk of voids and poor compaction.
  • Validate Concrete Mix Designs: Helps concrete producers and site engineers ensure mixes meet project specifications for flowability and workability, especially when using new materials or additives.
  • Monitor Onsite Performance: Offers a standardized and repeatable method for quality control in ready-mix concrete plants and on construction sites.
  • Reduce Labor and Improve Site Safety: The use of self-compacting concrete, validated through this test, minimizes the need for mechanical vibration, leading to safer and quieter working environments.

Related Standards

  • EN 12350-1: Sampling of fresh concrete
  • EN 12350-2: Standard slump test for conventional concrete
  • EN 12350-9: V-funnel test for SCC
  • EN 12350-10: L-box test for SCC
  • EN 12350-11: Sieve segregation test for SCC
  • EN 12350-12: J-ring test for SCC
  • ISO 5725: Precision of measurement methods - Repeatability and reproducibility

Practical Value

The adoption of oSIST prEN 12350-8:2008 supports reliable and comparable testing of SCC across different projects and labs. By standardizing the measurement of slump-flow and t500 time:

  • Contractors and suppliers gain confidence in SCC performance before and during construction, mitigating costly defects.
  • Designers benefit from accurate workability data, helping to specify appropriate SCC mixes for complex, reinforced, or densely packed structural elements.
  • Regulators and certifying bodies can rely on harmonized testing protocols, ensuring compliance and safety.

For anyone involved in the production or use of self-compacting concrete, compliance with this standard ensures high-quality construction outcomes and maximizes the benefits of SCC technology.

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Frequently Asked Questions

oSIST prEN 12350-8:2008 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Testing fresh concrete - Part 8: Self-compacting concrete - Slump-flow test". This standard covers: The document specifies the procedure for determining the slump-flow and t500 time for self-compacting concrete. The test is not suitable when the maximum size of the aggregate exceeds 40 mm.

The document specifies the procedure for determining the slump-flow and t500 time for self-compacting concrete. The test is not suitable when the maximum size of the aggregate exceeds 40 mm.

oSIST prEN 12350-8:2008 is classified under the following ICS (International Classification for Standards) categories: 91.100.30 - Concrete and concrete products. The ICS classification helps identify the subject area and facilitates finding related standards.

oSIST prEN 12350-8:2008 has the following relationships with other standards: It is inter standard links to SIST EN 12350-8:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

oSIST prEN 12350-8:2008 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

oSIST prEN 12350-8:2008 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-januar-2008
3UHVNXãDQMHVYHåHJDEHWRQDGHO6DPR]JRãþHYDOQLEHWRQ3UHVNXVUD]OH]DV
SRVHGRP
Testing fresh concrete - Part 8: Self-compacting concrete - Slump-flow test
Prüfung von Frischbeton - Teil 8: Selbstverdichtender Beton - Setzfließversuch
Essai pour béton frais - Partie 8: Béton auto-plaçant - Essai d'étalement au cône
d'Abrams
Ta slovenski standard je istoveten z: prEN 12350-8
ICS:
91.100.30
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2007
ICS 91.100.30
English Version
Testing fresh concrete - Part 8: Self-compacting concrete -
Slump-flow test
Essai pour béton frais - Partie 8: Béton auto-plaçant - Essai Prüfung von Frischbeton - Teil 8: Selbstverdichtender
d'étalement au cône d'Abrams Beton - Setzfließversuch
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 104.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12350-8:2007: E
worldwide for CEN national Members.

Contents Page
Foreword.3

1 Scope .4
2 Normative references .4
3 Principle.4
4 Apparatus .4
4.1 Baseplate .4
4.2 Rule or measuring tape.5
4.3 Stop watch.5
4.4 Spirit level.5
4.5 Container .5
4.6 Collar (optional) .5
5 Test sample .7
6 Procedure .7
7 Test result.7
8 Test report .8
9 Precision.8

Foreword
This document (prEN 12350-8:2007) has been prepared by Technical Committee CEN/TC 104 “Concrete and
related products”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This standard is based on the results from the EU-project “Testing-SCC” under the 5th Frame Programme
(GRD2-2000-30024/G6RD-CT-2001-00580).
Owing to its significant advantages in the improvement of construction quality and working environment, self-
compacting concrete (SCC) has been more widely accepted by the construction owners. The use of SCC in
practical concrete construction is stably increasing. Since SCC has to give satisfactory in-situ properties
(perfect filling of the mould and embedment of the reinforcement, homogeneity and full compaction) without
vibration, the proper methods for testing the workability of fresh SCC are very important. The workability of
fresh SCC should basically include three key properties: filling ability, passing ability and resistance to
segregation. It is desirable, especially in the case of new constituents or new concrete compositions, to test
the workability of fresh SCC before casting in place.
A number of test methods are available for testing fresh SCC. Most of the commonly used test methods were
evaluated in the recently closed EU-project “Testing-SCC” under the 5th Frame Programme (GRD2-2000-
30024/G6RD-CT-2001-00580). According to the results from this EU project, it seems no single test method
can completely cover all the three key properties. Nevertheless any test method should at least be correlated
to the practical situation and give consistent results in order to provide reliable data for judgment of concrete
workability.
This standard is one of a series concerned with testing fresh concrete.
This series EN 12350 includes the following parts:
EN 12350 Testing fresh concrete
Part 1: Sampling;
Part 2: Slump test;
Part 3: Vebe test;
Part 4: Degree of compactability;
Part 5: Flow table test;
Part 6: Density;
Part 7: Air content — Pressure methods;
Part 8: Self compacting concrete - Slump-flow test;
Part 9: Self compacting concrete - V-funnel test;
Part 10: Self compacting concrete - L-box test;
Part 11: Self compacting concrete - Sieve segregation test;
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