EGMC
New Terminal Building in Khartoum International Airport
APPLICATION OF EPOXY SCREED FOR FLOORS
Issue Status & Description Prepared by Technical office Manager Reviewed by Project QC Manager Approved by Project Manager
Document 0105-MS-07 Appendix A Appendix B Appendix C
Rev. 1 0 0 0
Issue Date
Technical Proposal New Terminal Building in Khartoum International Airport
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New Terminal Building in Khartoum International Airport
LIST OF CONTENTS
1.0 2.0 3.0 Introduction Health, Safety and Environment Resources. 3.1. 3.2. 3.3. 4.0 Manpower Equipment Material
Methodology 4.1 4.2 4.3 Materials. Inspection Requests Application Method
5.0 6.0
Sequence of Works Measurements
Appendix A Safety & Hazards Control Appendix B Appendix B Sequence procedure Data sheet for MBT material and SIKA material
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1.0 1.1
INTRODUCTION This Method Statement describes the procedure to be followed and the sequence of operations for this section of the works, which deals with the performance of the epoxy screed or mortar (5 mm thick.) to be applied on the concrete floors of the specified buildings according to the project specifications and drawings.
1.2
This Method Statement is prepared and issued in accordance with the general procedure Control of Documents and Data.
1.3
Revisions of this document will be issued in accordance with the general procedure Control of Documents and Data when the main text changes or when an appendix is added. Revised appendices for substitution will be issued separately and, where appropriate, will include a separate schedule of contents.
2.0
HEALTH, SAFETY AND ENVIRONMENT All necessary measures and precaution will be taken so that the above operations comply with the required safety regulations and procedures as described in the project HSE plan.
3.0
RESOURCES
3.1
Manpower
The required manpower will be deployed to assist on the cleaning, mixing material, application and all related works 3.2 EQUIPMENT
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New Terminal Building in Khartoum International Airport Mechanical grinder or sand blaster Mechanical mixer Air compressor. Brushes and rollers. Trowels. 3.3 Material Primer: The approved material Mastertop 1200 M (By MBT) with low viscosity and solvent free epoxy- primer will be used as a primer, or equivalent material SIKA FLOOR 94 (By SIKA), see the data sheets in appendix (C)
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New Terminal Building in Khartoum International Airport
Epoxy screed: The approved material Mastertop 1240 M (By MBT) will be used as epoxy mortar, it is a Multi component epoxy screed consists of three components OR material SIKA FLOOR 91 (By SIKA) may be used as an equivalent material, see the data sheets in appendix (C) Sealer: Mastertop 1200 M (By MBT) or equivalent material SIKA FLOOR 94 (By SIKA) will be used as sealer, see the data sheets in appendix (C)
4.0
Methodology: After finishing the concrete curing and the surface become very dry, the epoxy mortar will be applied as follows as per Construction Revised Drawings:
4.1
Materials. The Materials will be used as per described in Clause 3.3
4.2
Inspection Requests The Contractor will submit before starting the Epoxy mortar work inspection request for position of the working area.
4.3
APPLICATION METHOD 4.3.1 Surface preparation
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New Terminal Building in Khartoum International Airport A- Levelling control for surface during concrete pouring The upper surface for floor concrete must be finished by class U1 as per spcs clause 3.12.3 (a) . The concrete surface for large area will be levelled and finished by helicopter or similar equipment. B- Levelling control for surface after concrete setting The concrete floor shall be levelled prior to apply the epoxy screed. The areas with higher concrete level shall be chipped and removed. Repairing (if needed) of major defects shall be carried out. Surface shall be mechanically grinned (if needed) to remove all the loose particles until getting a sound concrete surface. Cleaning shall be carried out using the compressed air or industrial vacuum. In case of fair face finishing, area shall be mechanically brushed in order to increase the mechanical bond with the epoxy screed. 4.3.2 Limitation for working areas
A- Application on concrete surface without joints: The whole area will be divided to small areas with dimension depending on the rate of works, number of resources and setting time. The cold joint (joint during the construction) between each sub-area will not appeared after work completion due to the chemical bonding properties for the epoxy mortar materials. B- Application on concrete surface including joints:
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New Terminal Building in Khartoum International Airport For large areas, which include concrete joints as per the workshop slab on grade, the application area for epoxy mortar will depend on the area between these joints. The position and detail of these joints will be performed as per construction drawings and the joints to be filled with joint sealant. 4.3.3 SURFACE PRIMING
The surface to be cleaned before primer application. The base and reactor of the primer shall be mixed together and applied on the surface by brush or roller. Wait for 30 minutes after priming prior to lay the epoxy screed. 4.3.4 Screed application
The base and reactor shall be mixed together to a uniform consistency, and then added to the aggregate (filler material) in the mixer. Mixing shall continue for 5 minutes. The mixture shall be placed in the area surrounded by glass (or steel) strips as battens with average thickness 5 mm. Compacting and levelling the surface shall be carried out using metal straightedge and surface finishing shall be conducted using metal trowels. 4.3.5 SEALING
After the screed getting hard, the epoxy sealer can be applied to the surface to get a glossy and hard surface.
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New Terminal Building in Khartoum International Airport 4.3.6 CURING
The screed may be left for 7 days prior to open it for traffic in order to guarantee a high performance. Sequence of Works Cleaning. Primer Application. Epoxy Mortar Application. Sealing Application 5.0 Measurements Measurements for Epoxy screed (5 mm thick) will be according to the joint measurements and contract drawings. The interim and final evaluation of quantities after completion of works will be done similarly.
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APPENDIX A Safety and Hazards
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APPENDIX B
Sequence procedure
Sequence procedure: . Work Inspection to be submitted for starting up of the epoxy mortar works after cleaning and surface preparation. Submittal for final inspection of the finished surface
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New Terminal Building in Khartoum International Airport
APPENDIX C
Data sheet for MBT material and SIKA material
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