methode statement cf-sheets onto masonry

MC-Bauchemie Müller GmbH & Co. KG Am Kruppwald 1-8 D-46238 Bottrop Tel. (02041) 101-10 Fax: (02041) 101-188

[email protected] www.mc-bauchemie.de

Method statements

MC-DUR CF-Sheets

Structural reinforcement of masonry

Edition 07/2010

Method statements: MC-DUR CF-Sheets onto masonry Edition: 07/2010 of 8

1. Table of contents

Page

1. Table of contents 2

2. Introduction 3

3. Validity 3

4. Regulations and standards 3

5. Service 3

6. Application Advice 4

6.1 Areas of application 4

6.2 System components 4

6.3 Application 5

7. Work steps 7

8. Project samples 8


2. Introduction

This method statement describes products and corresponding application for reinforcement of masonry by means of surface-adhered MC-DUR CF-Sheets.

3. Validity

This method statement is valid for components of masonry.

All advice and information in this method statement are valid in connection with the indications in the current edition of the relevant technical data sheets.

Any variation of this method statement regarding application of our products generally requires a written agreement and/or confirmation.

4. Regulations and standards

The structure, the layout and the contents of this method statement were prepared according to current regulations and standards.

5. Service

Please ask for our special advice if you have any question regarding application of repair- and/or surface protection systems according to this method statement.

The department Protection Technologies is available via:

Tel.: +49(0)2041 101 10

Fax: +49(0)2041 101 188

E-mail: [email protected]

MC-Bauchemie Müller GmbH & Co. KG Am Kruppwald 1-8 D-46238 Bottrop Tel. (02041) 101-10 Fax: (02041) 101-188

[email protected] www.mc-bauchemie.de

6. Application Advice

Subsequent reinforcement of components of masonry by means of MC-DUR CF-Sheets

Manufacturer: MC-Bauchemie Müller GmbH & Co. KG, Am Kruppwald 1-8, D-46238 Bottrop

System designation: MC-DUR CF-Sheets

6.1 Areas of application

By means of CF-Sheets masonry can be durably reinforced considering this method statement. Typical areas of application:

- subsequent limitation of crack widths - lacing of pillars/columns (increase of load-bearing capacity) - subsequent seismic (base-isolated) reinforcement in earthquake areas - increase of shear bearing capacity of girders - various special applications

6.2 System components

No. Name of product Function (layer thickness)

Delivery kg

Storage, months

Storage conditions

1

MC-DUR 1009 HB (for epoxy resin mortar)

bonding coat

packs à 3

12

dry and cool protect MC-DUR 1009 HB from frost

2

MC-DUR 1000 Parat 09

epoxy resin mortar

packs à 10

12

dry and cool protect MC-DUR 1000 Parat 09 from frost

3

MC-DUR CF-Sheets

carbon fibre reinforcement sheets

rolls1)

-

dry

4a 4b

MC-DUR 1209 TX (thixotropic EP-resin) MC- DUR 1209

primer resin

packs à 30 12 packs à 10 5

12

12

dry and cool, protect from frost

1) Roll lengths on request / standard widths: 300 mm & 600 mm

Security / Ecology / Protective measures: See DIN-safety data sheets of the relevant products

Disposal: According to DIN-safety data sheets, paragraph 5.5


6.3 Application

Substrate preparation: The requirements for surfaces to be reinforced by means of CF-Sheets (max. residual moisture, surface roughness and –evenness etc.) are to be observed separately and/or indicated by the planner.

Additional requirements: Potential project specific additional requirements are to be observed.

1 2 3 4 5

No. Components

Temperature material, air, substrate, (min/max.)

Maximum relative

humidity

Composition Mixing ratio

Mixing (time and type)

[°C] [%] [p.b.w.] [min]

1

MC-DUR 1009 HB

8 / 30

85

packs

(component A & B)

31)

2

MC-DUR 1000 Parat 09

8 / 30

85

packs

(component A & B)

31)

5a

5b

MC-DUR 1209 TX

MC-DUR 1209

8 / 30

8 / 30

85

85

packs

(component A & B)

packs (component A & B)

31)

31)

1)

After mixing re-potting anchor-wise with slowly rotating mixers (max. 300 rpm) into a clean container and mix again.

6 7 8 9 10 11

No. Layer thickness min/max, one-layer

sev. layers

Pot life at

5/23/30 [°C]

Appli-cation

Waiting time until

application of subseq.

layer 5/23/30 [°C]

Curing time and

type

Coverage 2)

[mm] [minutes] [h] [d] [kg/m2]

1 90 / 45 / 20 brush fresh-in-fresh

0.5

2

6 / 20

(20 / 40)

60 / 30 / 15

hand

121)

per mm thickness:

1.8

4a

4b

0.5 / 3

60 / 45 / 25

45 / 35 / 20

hand

hand

24

per mm thickness: 1.33

0.4 - 0.63)

1) If a second layer is required it must be applied at least within 48 hours

2) Coverage rates do not include any surface roughness and/or material loss due to rebound

3) Total consumption depends on the type (weight) of CF-Sheet


7. Work steps

7.1 Substrate preparation

The structural surface to be reinforced is prepared by suitable measures, e.g. grit blasting. The surface must

be sound, dry (residual moisture ≤ 6 %) and free from grease and dust. Surfaces must be rough. A minimum surface pull-off strength of 1.0 MPa is recommended.

7.2 Repair / blowholes

Joints and damaged areas must be repaired with Epoxy resin mortar MC-DUR 1000 Parat 09 after substrate preparation. The application advice of the manufacturer must be observed.

7.3 Cutting of CF-Sheets

The uni-directional MC-DUR CF-Sheets are cut to size on site using suitable tools (e.g. scissors or cutter). Important: The CF-Sheets must not be folded!!!

7.4 Mixing of resin

The two components of the resin are mixed thoroughly for at least 3 minutes until homogeneous, using slowly rotating, anchor-shaped mixers (max. 300 rpm) to avoid trapped air during mixing. After mixing the resin is filled into a clean container (re-potting) and mixed again thoroughly.

.


7.5 Application of bonding coat

The thixotropic resin MC-DUR 1209 TX is used as primer for the CF-Sheets. It is evenly applied onto the prepared substrate, using a trowel, a float or similar tools. The material consumption depends on the roughness of the substrate, approx. 1.5 kg/m² to 3.0 kg/m².

7.6 Application of CF-Sheets

The MC-DUR CF-Sheets are pressed into the still fresh resin – in the required direction – and afterwards worked in using a roller or similar tools. Important: direction of application = direction of fibres!!! Exterior corners must be rounded with a minimum radius > 2.50 cm. Afterwards MC-DUR CF-Sheets can be applied around corners.

7.7 Rolling of CF-Sheets

The applied CF-Sheets are afterwards coated with MC-DUR 1209, using a roller. It must be ensured during application that the carbon fibres are completely embedded in the resin. If the CF-Sheets are applied in several layers, application is carried out fresh-in-fresh. The single layers are then pressed into the previous, still fresh layer and coated each with MC-DUR 1209, using a roller. The material consumption is approx. 0.3 kg/m² to 0.6 kg/m², dependent on the type (weight) of CF-Sheet.

7.8 Coating of CF-Sheets

The MC-DUR CF-Sheets can directly be coated with the MC surface protection systems, e.g. EmceColor-flex E/S. In case of subsequent mineral coating the fresh MC-DUR 1209 is strewn with oven-dried quartz sand, aggregate size 0.2 to 0.7 mm.

8. Project samples


8.1 Strengthening of columns


8.2 Strengthening of masonry

methode statement cf-sheets onto masonry

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