Method statement for Late Applied Spatterdash

Effective Date:

Document No.:

Issue No.:

Revision No.:

Page:09/07/2013MST/A/0011

1. 19/7/2013

Construction of Lower Ngau Tau Kok Redevelopment Ph 2 & 6, Demolition and Minor Works at Tung Tau Estate Redevelopment Phase 8 and Alteration and Addition Works at Homantin Estate(Contract No. 20120141)

Method Statement for Late Applied SpatterdashPrepared by: Rosemary LeungReviewed by: Alex Chan

Reviewed by: Raymond Wong

Contractor: Gammon

Contractor: Gammon

Contractor: Gammon

Signature

Name: Post: AQCC

Signature

Name: Post: QCMSignature

Name: Post: QEDate: 19 (dd)/ 07 (mm)/2013

Date: 20 (dd)/ 07 (mm)/2013

Date: 22 (dd)/ 07 (mm)/2013Reviewed by: Dickson LiReviewed by: Approved by: CL ChowContractor: Gammon

Contractor: Gammon

Contractor: GammonSignature

Name: Post: Safety Officer

Signature

Name:Post: TWCSignature

Name:Post: Site AgentDate: 19 (dd)/ 07 (mm)/2013

Date: 20 (dd)/ 07 (mm)/2013

Date: 19 (dd)/ 07 (mm)/2013

CONTENT

1. Introduction

2. Sequence and Method of Works2.1 Surface Preparation

2.2 Application of Spatterdash3. Quality Control4. Safety Concern5. Environmental ProtectionAppendix AStandard Method Statement from Supplier (As reference document to show compliance with suppliers recommended method)B

Material Safety Data Sheet of Bonding Agent for Spatterdash

C

Risk Assessment & Hazard identificationD

Field Control Sheet

1. Introduction

This submission covers the method statement of spatterdash for vertical concrete surface and soffits, where plastering or rendering will be received.2. Sequence and Method of Works2.1. Surface PreparationThe concrete surface shall be cleaned of all loose, dust or deleterious materials, especially from oils or other contaminants likely to affect the bond. The application shall be thoroughly wetted and saturated but shall have no standing water on the surface.2.2. Application of spatterdashSpatterdash shall be applied to vertical concrete surface and soffits after the surface is fully cured. Use high pressure water jet to clean off dust and loose particles before application of spatterdash.Spatterdash shall be consist of (1:2) cement: coarse sand with a bonding agent (please refer to material submission ref: LNTK2&TT8&HMT/FIN/007) , Nitobond SBR, and keep well stirred by both hand mix or machine mix. The mixture shall be applied by dashing it on the previously dampened background by a hand scoop or a trowel to give a complete coverage with a rough texture, as per specification FIN1.W210.5 as below:1) Uncovered areas do not exceed 0.01m2

2) Spacing between strokes is less than 50mm

3) Uncovered area at wall edges is less than 50mm

3. Quality Control

To ensure the works are completed up to the standard, the working method and acceptance criteria shall be communicated to relevant supervision staff, subcontractors and workers.Following pre-checking of completed works by supervision staff to confirm compliance, an inspection form shall be submitted to CMs representative for arranging joint inspection of works.

Test Procedure for spatterdash as per specification FIN1.W240.5 as below:1) Carry out joint inspection with CMs representative to minimum 10% of spatterdash

2) After hardening and curing, check the adhesion of the spatterdash coat by brushing with a stiff wire brush3) Where spatterdash is easily removed, completely remove loosened spatterdash. Re-apply and re-inspect after 7 days.4) Subsequent works will not be started on any affected area until re-inspection is to CMs satisfaction.4. Safety Concern

All works at high level will be performed on the temporary working platform, which should be checked and approved by competent person bi-weekly. Form 5 signed by competent person should be posted on the temporary working platform at all time.Workers working at high level shall wear safety harness at all time with lanyard connected to supports fixed to independent lifeline. To prevent falling of hand tools, toe boards would be fixed to working platform.Risk Assessment, Hazard Identification & Field Control Sheet:

- Please refer to Appendix C & D5. Environmental Assessment

Close supervision will be carried out through the spatterdash in order to minimize any adverse impacts to the surrounding environment. All cement bags shall be covered with tarpaulin sheet to prevent inhalation of cement powder. Chemical containers will be labelled as per attached Material Safety Data Sheet (MSDS).

Appendix AStandard Method Statement from Supplier

Appendix BMaterial Safety Data Sheet of Bonding Agent for Spatterdash

Appendix CRisk Assessment & Hazard identificationRisk Assessment & Hazard IdntificationWorks Related Projects/Department: J3299 Victoria Park Swimming Pool Complex

Type of Activity Operation: Spatterdash

Appendix D Field Control Sheet

Lower Ngan Tau Kok

LNTK 2&6

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