Main changes to draft SR 21:2013
Hardcore material for use under concrete floors
Engineers Ireland
5th November 2013
Sarah Neary BE MBA CEng MIEI
Senior Adviser
Building Standards
Environment, Community and Local Government
Presentation overview
• Report of the Pyrite Panel
• What is in SR 21 ?
• Specification for “hardcore” for use under concrete floors –
SR 21 - Annex E .
Report of the Pyrite Panel
Report of the Pyrite Panel
• Report of the Pyrite Panel - June 2012
• Summary
– Panel investigated the nature, scale and reason
for the problem
– Panel examined the roles and responsibilities of
stakeholders
– Panel made recommendations for solving the
existing problem and for preventing similar
problems arising in the future
• Recommendations for standards
– Rec1: Testing Protocol
– Rec3: Method statement for remediation works
– Rec15: (a)Review of SR 21:2004+A1:2007
(b)Standalone specification for hardcore
Response to the Report of the Pyrite Panel
Legacy issues
Irish Standard I.S. 398
Irish Standard I.S. 398 1: 2013
Reactive pyrite in sub-floor hardcore material
– Part 1: Testing and categorisation protocol
Irish Standard I.S. 398 2: 2013
Reactive pyrite in sub-floor hardcore material
– Part 2: Methodology for remediation works
Use of documents in Remediation works
Legacy issues
Irish Standard I.S. 398
Testing
Irish Standard I.S. 398 1: 2013
Reactive pyrite in sub-floor hardcore material
– Part 1: Testing and categorisation protocol
Irish Standard I.S. 398 2: 2013
Reactive pyrite in sub-floor hardcore material
– Part 2: Methodology for remediation works
Remedial works
methodology
Use of documents in Remediation works
Legacy issues
Irish Standard I.S. 398
Future prevention
Standard Recommendation S.R.21 201X
Testing
Irish Standard I.S. 398 1: 2013
Reactive pyrite in sub-floor hardcore material
– Part 1: Testing and categorisation protocol
Irish Standard I.S. 398 2: 2013
Reactive pyrite in sub-floor hardcore material
– Part 2: Methodology for remediation works
Remedial works
methodology
S.R. 21: Guidance on the use I.S. EN 13242:2013 –
Aggregates for unbound and hydraulically bound
materials for use in civil engineering work and
road construction
Annex E: Recommendations for the specification
of unbound granular fill (hardcore) for use under
concrete floors and footpaths
Irish Standard I.S. XXX 201X
Code of Practice for the procurement and use of
unbound granular fill hardcore for use under
concrete floors
Use of documents in Remediation works
Legacy issues
Irish Standard I.S. 398
Future prevention
Standard Recommendation S.R.21 201X
Testing
Irish Standard I.S. 398 1: 2013
Reactive pyrite in sub-floor hardcore material
– Part 1: Testing and categorisation protocol
Irish Standard I.S. 398 2: 2013
Reactive pyrite in sub-floor hardcore material
– Part 2: Methodology for remediation works
Remedial works
methodology
S.R. 21: Guidance on the use I.S. EN 13242:2013 –
Aggregates for unbound and hydraulically bound
materials for use in civil engineering work and
road construction
Annex E: Recommendations for the specification
of unbound granular fill (hardcore) for use under
concrete floors and footpaths
Specification
for hardcore
Irish Standard I.S. XXX 201X
Code of Practice for the procurement and use of
unbound granular fill hardcore for use under
concrete floors
Procuring & using
hardcore
Status of documents - November 2013
Legacy issues
Future prevention
Irish Standard I.S. 398
Standard Recommendation S.R.21 201X
Irish Standard I.S. 398 1: 2013
Reactive pyrite in sub-floor hardcore material
– Part 1: Testing and categorisation protocol
S.R. 21: Guidance on the use I.S. EN 13242:2013 –
Aggregates for unbound and hydraulically
bound materials for use in civil engineering
work and road construction
Irish Standard I.S. 398 2: 2013
Reactive pyrite in sub-floor hardcore material
– Part 2: Methodology for remediation works
Irish Standard I.S. XXX 201X
Code of Practice for the procurement and use
of unbound granular fill hardcore for use under
concrete floors
What is in SR 21?
Evolution of SR 21
• SR 21: 2004
– Guidance on the use of I.S. EN 13242:2002 –
Aggregates for unbound materials for use in civil
engineering work and road construction
• SR 21:2004+A1:2007
– Guidance on the use of I.S. EN 13242:2002 –
Aggregates for unbound materials for use in civil
engineering work and road construction
(incorporating amendment 1: 2007)
•
•
Annex E: Example specification for unbound granular fill for
use under concrete floors and footpaths
Section 3.4.2
• SR21: 201X
– Guidance on the use of I.S. EN 13242:2013 –
Aggregates for unbound materials for use in civil
engineering work and road construction
– What’s new?
What’s new?
(SR 21 - Public Enquiry document)
• SR 21: 201X - Guidance on the use of I.S. EN 13242:2013 – Aggregates for unbound materials for
use in civil engineering work and road construction
What’s new?
• Complete revision of text due to change from I.S. EN 13242:2002 to I.S. EN 13242:2013
– Recycled aggregates
– Manufactured aggreates
– Factory production control elsewhere (I.S. EN 16236:2013 )
• Guidance on the change from CPD to CPR
• Guidance on the use of I.S. EN 16236:2013 Evaluation of conformity of aggregates - initial
type testing and factory production control
• Provides guidance on specifying aggregates for use in unbound and hydraulically bound
materials
• Revision of Annex E in line with the I.S. EN 13242:2013 and the recommendations of the pyrite
panel
– Recommendations for the specification of unbound granular fill (hardcore) material for use under
concrete floors and footpaths
» Material properties
» Procedures for production
What’s new?
(SR 21 - Public Enquiry document)
• SR 21: 201X - Guidance on the use of I.S. EN 13242:2013 – Aggregates for unbound materials for
use in civil engineering work and road construction
What’s new?
• Complete revision of text due to change from I.S. EN 13242:2002 to I.S. EN 13242:2013
– Recycled aggregates
– Manufactured aggreates
– Factory production control elsewhere (I.S. EN 16236:2013 )
• Guidance on the change from CPD to CPR
• Guidance on the use of I.S. EN 16236:2013 Evaluation of conformity of aggregates - initial
type testing and factory production control
• Provides guidance on specifying aggregates for use in unbound and hydraulically bound
materials
• Revision of Annex E in line with the I.S. EN 13242:2013 and the recommendations of
the pyrite panel
– Recommendations for the specification of unbound granular fill (hardcore)
material for use under concrete floors and footpaths
» Material properties
» Procedures for production
Specification for “hardcore”
SR 21 - Annex E
Annex E –Recommendation for the specification of unbound
granular fill (hardcore ) for use under concrete floors and footpaths
• Material properties
1.
2.
3.
4.
5.
Geometric properties
Physical properties
Chemical properties
Geological & petrographic properties
Aggregate type
• Procedures for production
1.
2.
3.
4.
Evaluation of conformity
Sampling and testing plan
Traceability
Certification
Annex E: Material properties
1. Geometric properties – grading
•
•
Special aggregate grating because of particular use eg crushed rock 0/31.5DG80
Changed from single size (2007) to all-in aggregate – ease of compaction
Annex E: Material properties
2. Physical properties
•
Los Angeles Coefficient (LA)
– An indicator of resistance to fragmentation
– Limit set at < or = 30 (previously LA40 improved strength)
•
Water Absorption (WA)
–
–
–
–
•
An indicator of potential durability
Limit set at < or = 2% for gravels and non-limestone rock
Irish Concrete Federation – to carry out survey
Limit for limestone may be reduced subject to survey by Irish Concrete Federation
Magnesium sulfate soundness (MgSO4)
– An indicator of potential durability
– This test must be done (previously only when WA exceeded 2%)
– Limit set at < or = 25%
Annex E: Material properties
3. Chemical properties
•
Acid soluble sulfate (AS)
– Limit maintained at < or = 0.2%
•
Total sulfur (S)
– Limits revised as follows:
• S < 0.3%
• S between 0.3% and 1% (inclusive) - Petrographic Assessment required
• S > 1% - Not suitable
Annex E: Material properties
4. Geological & petrographic properties
•
Geological description of the aggregate (end product)
– Professional geologist - to identify deleterious rock types (if present)on
the basis of mineralogical composition. All information on lithologies
and mineral recorded
– Mudrock most likely to swell and to contain framboidal pyrite
 Mudrock content limited < 10%
•
Petrographic assessment of the aggregate (end product)
–
–
–
–
–
Only carried out when total sulfur content is between 0.3% and 1%
Professional geologist/ petrographer
Thin Section petrographic assessment & (if necessary) X-Ray Diffraction
Primarily to establish the form & distribution of pyrite present (if any)
Predominantly reactive pyrite means it is unsuitable as “hardcore” for
use under concrete floors
– Professional geologist to make a declaration taking all parameters into
account to deem it suitable.
– If Pyrrhotite is present a limit of < or = 0.4% S
Annex E: Material properties
5. Aggregate type
•
No recycled aggregates
•
No manufactured aggregates
•
Only natural aggregates should be used for “hardcore”
Annex E –Recommendation for the specification of unbound
granular fill (hardcore ) for use under concrete floors and footpaths
• Material properties
1.
2.
3.
4.
5.
Geometric properties
Physical properties
Chemical properties
Geological & petrographic properties
Aggregate type
• Procedures for production
1.
2.
3.
4.
Evaluation of conformity
Sampling and testing plan
Traceability
Certification
Annex E – Procedures for production
1. Evaluation of conformity (I.S. EN 16236:2012)
•Assessment and verification of constancy of
performance (AVoCP) System 2+ (Previously System 4)
– Initial Type Testing (ITT)*
•
•
A new source of aggregates
Major change in raw materials
*
– Factory Production Control (FPC)*
•
Organisation, control procedures, inspections &
tests, records, control of non-conformities,
handling, storage & conditioning of production
areas, transport and packaging, training.
•
Initial inspection of quarry and FPC*
•
Continuous surveillance, assessment & approval*
•
Regular testing - to a prescribed test plan*
*
Annex E – Procedures for production
2. Sampling and testing plan
Note 1:
Test frequencies may be
revised based on the
advise of the
professional geologist.
Note 2:
Test frequencies are
generally related to
periods of production. A
period of production is
defined as a full week,
month, or year of
production working
days.(I.S.EN 16326 6.4.3)
Annex E: Material properties
•
Geological assessment of the quarry deposit
– Professional geologist – initially, annually and at a major change of lithology (or as per Prof Geo)
– Initial assessment – to identify & map proportions of lithologies, document problematical
lithologies, evidence of reactive pyrite, reference any limitations on use.
– I.S. EN 16236 (6.3.4 – Knowledge of the raw material)
Annex E – Procedures for production
3. Traceability
•
The Declaration of Performance (DoP) should include a statement declaring Annex E
material as a special aggregate required for a particular end use i.e. unbound granular
fill (hardcore) for use under concrete floors and footpaths.
•
The relevant delivery docket should state that the material complies with Annex E of
SR 21. The following description should be used on dockets:
"GRANULAR FILL SR21:2013 ANNEX E"
Annex E – Procedures for production
4. Certification
•
Materials produced in compliance with I.S. EN 13242 and SR 21 Annex E should only be
supplied by producers who have achieved third party certification in accordance with
assessment and verification of constancy of performance (AVoCP) system 2+.
–
CE Marking
–
Declaration of performance
Annex E –Recommendation for the specification of unbound
granular fill (hardcore ) for use under concrete floors and footpaths
• Material properties
1.
2.
3.
4.
5.
Geometric properties
Physical properties
Chemical properties
Geological & petrographic properties
Aggregate type
• Procedures for production
1.
2.
3.
4.
Evaluation of conformity
Sampling and testing plan
Traceability
Certification
What’s next?
• SR 21 - Public enquiry closed on 1/11/2013
• Committee to review comments
• Final version of SR 21 to be published asap
• Irish Standard I.S. XXX 201X - Code of Practice for the procurement and use of
unbound granular fill hardcore for use under concrete floors
–
–
–
–
–
In progress
Post production activities
Procurement, haulage, delivery, receipt,
storage and handling, placing,
record management etc.
Thank you