Promenade Concrete Cracking

Summary

The request sought minutes from a meeting convened to discuss concrete cracking on the Douglas Promenade, and the Department of Infrastructure disclosed the full minutes of the meeting held on 28 January 2020.

Key Facts

• A meeting was held on 28 January 2020 to discuss repair methods for cracking concrete infill slabs on the Douglas Promenade.
• Attendees included representatives from the Department of Infrastructure (DOI), BSA, and Auldyn.
• It was agreed that cracks wider than 0.3mm would be the criteria for repair.
• The horse-drawn tram service was scheduled to resume on 21 April 2020, creating a deadline to test repair methods.
• Proposed repair materials included Fosroc Nitofill LV epoxy resin and Renderoc ST 05 cement-based mortar.

Data Disclosed

• 28/01/20
• 2:30pm - 4:00pm
• 21st April
• 0.3mm
• August 2019
• February
• March
• 9th January
• chainage 1920 – 1960
• 1:1.5
• 4199100
• 4199100-200130-123857-LM-1

Original Request

Please supply the minutes for the meeting 'separately convened meetings' that were convened to discuss the issue of cracking concrete on Douglas Promenade, as requested by Mr J Robinson, Director of Highway Services (DOI) during the Strategic Board meeting held on 14th February 2020. For reference this was item 2.10 (5.0) on the minutes from that meeting.

Data Tables (1)

Data Tables (reformatted)

Full Response Text

Minutes 17A Victoria Street DOUGLAS Isle of Man IM1 2LW Tel 01624 662155 Fax 01624 662141 e-mail admin@burroughs.co.uk

Project Details Ref: 4199100 Title: Douglas Promenade, Isle of Man

Meeting Details Number: 1

Purpose: Concrete repair

Date: 28/01/20

Time: 2:30pm - 4:00pm

Location: Boardroom

Organiser: (Graduate Engineer)

Document Reference: Ref: 4199100-200130-123857-LM-1

Circulation:

Delegate Name:

Company:

Position:

Initials:

Gary Saunders Keith Podmore Peter Winstanley Aidan McCusker

Tadhg O’Mahoney Mark Gorry

DOI DOI DOI DOI DOI Auldyn BSA BSA BSA

Construction Manager Contract Project Manager Project Support Head of Design Designer Director Associate Director Project Manager Graduate Engineer

GS KP PW AM JR TO’M MG MD LM

Items for Discussion:

Ref:

Detail:

1.0

Repair of cracking to concrete infill slabs The location for the test panel for the repairs was discussed, and it was agreed that anywhere within Seaside 1 (The dual track laid centrally within the road) would be suitable as there would be space to set up fencing and TM. The slabs at the bottom of Summerhill Road were considered for the repair, however they are known to have poor surface texture not extensive cracking.

Minutes 17A Victoria Street DOUGLAS Isle of Man IM1 2LW Tel 01624 662155 Fax 01624 662141 e-mail admin@burroughs.co.uk

It was noted that horse drawn trams will begin to run on the rail again on the 21st April, and GS noted it would be preferable to test a repair method before this date to allow a review of the method and its suitability before the scheme is completed.

BSA proposed the use of Fosroc Nitofill LV, a low viscosity epoxy resin that would be injected into the cracks, combined with Renderoc ST 05, a cement-based mortar with the red pigment mixed in to cover the surface of the crack. These were discussed and it was agreed that an injected resin was the way forwards, but the resin would preferably be clear, or colour matched to the concrete. It was considered that the grey Fosroc products may stand out against the infill slabs and make the cracking more noticeable. There was also concern that the mortar would not be suitable for the surface of the slabs which are currently heavily trafficked, and that mixing the pigment into the mortar may not provide an exact colour match as the slabs vary in colour.

LM to circulate Fosroc datasheets.

The proposed repair methods from each of the concrete reports were discussed, it was noted that the report’s conclusions should be checked to see whether they agree on the repair method or materials.

LM to review conclusions of each report.

TO’M stated he believed there would be specialist subcontractors who have good knowledge of crack repair and the various methods and materials, who would be able to provide a suitable repair method. It was noted that Allied Infrastructure, who are already working on the IOM airport, may have some knowledge of this. BSA agreed to look into further repair options from their side as well.

TO’M to discuss with Allied.

Minutes 17A Victoria Street DOUGLAS Isle of Man IM1 2LW Tel 01624 662155 Fax 01624 662141 e-mail admin@burroughs.co.uk

2.0

GS suggested that it may be useful to resin inject the cracks first, and then once the test panel has been completed the aesthetics of the repair and the weathering of the colour can be assessed.

GS also suggested that it may be necessary to undertake another survey of the infill slabs, to note the crack widths in comparison to the survey undertaken in August 2019. MG suggested it could be possible to undertake the survey in February, to allow a trial of the repairs in March before the horse tram starts running again.

MG to organise survey of cracking.

JR queried what the criteria would be for cracks that would be repaired, it was agreed that cracks greater than 0.3mm in width would suffice as anything smaller would not be visible, and also injecting cracks of that width may be difficult and time consuming.

GS noted the longitudinal cracking which was mentioned in an email on the 9th January. The extent of the cracking was discussed however the exact location and extent of the cracking was unknown.
NOTE: Email states the longitudinal cracking occurs between chainage 1920 – 1960.

MD noted that for the larger cracks or cracks that are diagonal across the slabs, there was potential for chasing out and sealing these to act as expansion joints.

Infill slab layout BSA tabled draft drawings which showed the single track slab layout, which had been designed by strictly following the rule of not having an aspect ratio greater than 1:1.5. Due to the varying widths of the slabs along the scheme, it was discussed and the DOI agreed that it would

Minutes 17A Victoria Street DOUGLAS Isle of Man IM1 2LW Tel 01624 662155 Fax 01624 662141 e-mail admin@burroughs.co.uk

3.0

4.0 provide a better visual if the slabs all had the same joint spacing, i.e. sometimes exceeding the aspect ratio but providing consistent joint spacing.

LM to feed back to team and get slab layouts updated.

Department of Infrastructure Sea Terminal Building, Douglas, Isle of Man, IM1 2RF

Contact: FOI Response Team DW/TS Telephone: (01624) 686785 Email: DPO-DOI@gov.im

Our ref: 1213049 13 March 2020

Dear ###

We write further to your request which was received on 4 March 2020 and which states:

"Please supply the minutes for the meeting 'separately convened meetings' that were convened to discuss the issue of cracking concrete on Douglas Promenade, as requested by Mr J Robinson, Director of Highway Services (DOI) during the Strategic Board meeting held on 14th February 2020. For reference this was item 2.10 (5.0) on the minutes from that meeting." Please note that, while we have provided the information you have requested, we have redacted any personal data contained in the notes because an exemption under s.25 (absolutely exempt personal information) of the Act applies to that information.
The reasons why that exemption applies are that: • The Department of Infrastructure is satisfied that the information amounts to personal data of which you are not the data subject|; and • The Department of Infrastructure is satisfied that disclosure of the information would contravene one of the data protection principles as set out in Article 5 of the General Data Protection Regulation as it applies in the Isle of Man pursuant to the Data Protection (Application of GDPR) Order 2018, namely that the Department of Infrastructure can only disclose the information where it would be fair, lawful and meet one of the conditions for lawful processing in Article 6 and in this case, none of those conditions have been met. The Strategic Board meeting which took place on 10 January 2020 and not the 14 February 2020 and which recommended a subsequent meeting to discuss the cracking was held on 28 January 2020. The minutes from the meeting are attached at Appendix 1. Please quote the reference number 1213049 in any future communications. Your right to request a review

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