ISO 5091-2:2023

INTERNATIONAL ISO
STANDARD 5091‐2
First edition
2023-07
Structural intervention of
existing concrete structures using
cementitious materials —
Part 2:
Top‐surface overlaying
Intervention structurelle sur les structures en béton existantes
utilisant des matériaux cimentaires —
Partie 2: Recouvrement de la surface supérieure
Reference number
ISO 5091‐2:2023(E)
© ISO 2023
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Published in Switzerland
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ISO 5091‐2:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Investigation of existing structure.2
4.1 General . 2
4.2 Investigation . 2
4.2.1 Investigation using documents, records . 2
4.2.2 On-site investigation . 3
5 Intervention design. 3
5.1 General . 3
5.2 Structural plan . 3
5.3 Structural details . 3
6 Materials . 4
6.1 General . 4
6.2 Materials in existing structure . 4
6.3 Materials used in repairing or strengthening parts . 5
6.3.1 Cementitious materials . 5
6.3.2 Reinforcing materials . 5
6.3.3 Bonding products . 5
6.3.4 Waterproof materials . 5
6.3.5 Pavement materials . 5
6.4 Characteristic values and design values of materials for repaired or strengthened
parts . 6
6.4.1 General . 6
6.4.2 Cementitious materials . 6
6.4.3 Reinforcing materials . 6
6.4.4 Bonding products . 6
7 Actions . 6
7.1 General . 6
7.2 Actions for intervention design . 6
8 Performance verification for repaired or strengthened structure .6
8.1 General . 6
8.2 Calculation of response . 7
8.2.1 General . 7
8.2.2 Modelling of structure. 7
8.2.3 Structural analysis . 7
8.2.4 Calculation of response values . 7
8.3 Durability verification . 7
8.3.1 General . 7
8.3.2 Verification related to steel corrosion . 7
8.4 Safety verification . 7
8.4.1 General . 7
8.4.2 Verification related to failure . 7
8.4.3 Verification related to fatigue failure . 8
8.5 Serviceability verification . 9
8.5.1 General . 9
8.5.2 Stress level limit . 9
8.5.3 Verification related to appearance . 9
8.6 Restorability verification . 9
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ISO 5091‐2:2023(E)
8.6.1 General . 9
8.7 Structural details . 9
8.7.1 Thickness of top-surface overlaying parts . 9
8.7.2 Cover . 10
8.7.3 Placement of reinforcing materials. 10
8.7.4 Joints for reinforcing materials . 10
8.7.5 Structural details related to seismic performance . 10
9 Construction .11
9.1 General . 11
9.2 Prior investigation and construction plan. 11
9.3 Mix proportion of cementitious materials . 11
9.4 Preparation .12
9.5 Surface treatment . 12
9.6 Assembly of reinforcing materials . 13
9.7 Manufacture of cementitious materials . 13
9.8 Transportation, placement, compaction and finish . 13
9.9 Curing .13
9.10 Pavement . 13
9.11 Quality control . 14
9.12 Inspection . 14
10 Records . .
...