The purpose of this method is to describe the methodology involved in construction work for tMETHOD STATEMENT FOR CONCRETE REPAIRING WORK and to detail out the steps to be taken in order to meet the technical requirements of VP1 BOT Thermal Power Plan
Comment Response Sheet (CRS) Project Title Van Phong BOT Thermal Power Plant Project Document Title METHOD STATEMENT FOR CONCRETE REPAIRING WORK Document Type For Approval Document No VP1-0-L4-C-GEN-10025 Returned Status NA Prepared by CRS No VP1-0-L4-C-GEN-10025-A-CRS CRS Issued Date 13/05/2020 Engineer Construction Remarks No Section/ Page Owner’s Comment Response to Comment Review Date Status O/C * Supplement item "Classification of the concrete defects and its reason" so that can propose a proper repair method (Voids, Honeycomb, Scaling, Crack, Cold joint, Damaged) Lot4 addition in revision B 13/05/2020 Closed O Before stepping the repair procedure for each defect, please provide summary table as below Noted and addition in revision B 13/05/2020 Closed O It needs to be assessed if there is any other underlying damage before the repair methods described in this document can be applied Lot4 will proposal method case by case specifically and addition in revision B 13/05/2020 4 The cause of the crack needs to be assessed Noted and addition in revision B 13/05/2020 Closed O Please delete the information of 40mm in all content Lot4 revised in revision B 13/05/2020 Closed O material shall be same strength with base concrete at least The material strength at least equal concrete strength Addition in revision B 13/05/2020 The repaired surface needs to be re-examined after a specified amount of time to check if the crack has reappeared The repair surface will re-checking after repaired 24 hour, if appear crack must be re-repair as described in this MS (revised in revision B) 13/05/2020 L4 O Closed Closed O O Closed Page of Comment Response Sheet (CRS) Not agreed since consider the material strength in case air void is serious Lot4 change material as revision B 13/05/2020 Closed O Cement slurry will make crack due to strong shrinkage, recommend to use Sika Refit 2000 or cement mortar with Sika latex Lot4 will use Sika Refit 2000 or GPS mota 16 13/05/2020 Closed O 10 Specify maximum depth of chipping for which this treatment can be applied Maximum depth of chipping for this treatment is 20mm 13/05/2020 Closed O 11 Specify maximum depth of chipping for which this treatment can be applied What will be done if the reinforcement bars are reached/exposed? Maximum depth of chipping for this treatment is 50mm 13/05/2020 Closed O 12 Before apply Monotop R, recommend to use Monotop Lot4 revised in revision B 13/05/2020 Closed O 610 as primer layer 13 Before any remedial measure the cause of the crack needs to be assessed Lot4 revised in revision B 13/05/2020 O Closed 14 Missing method to repair crack for the floor for example in building floor when through crack Base on assessed actual reason and width of crack Lot4 will propose method for case by case specification 13/05/2020 15 Water leak test is needed after treatment Please add Lot4 revised in revision B 13/05/2020 16 11 Supplement repair method for Scaling concrete, Cold joint and Damaged Lot4 added in revision B 13/05/2020 Closed O 17 11 It needs to be checked if the reinforcement bars have moved so that they might be closer to the repaired surface than the prescribed cover Unsuitable placement of reinforcement might require more extensive repair including complete removal and reconstruction Lot4 noted and addition in revision B 13/05/2020 O Closed O Closed O Closed Page of Comment Response Sheet (CRS) Additional Notes (if any) * O - Open, C – Closed Page of AP APPROVED Approved AC APPROVED WITH COMMENT Contractor to revise the correction and resubmit NA NOT APPROVED Revise the correction and resubmit before proceeding RE REVIEWED Information acknowledged with no comment For Approval RC REVIEWED WITH COMMENT Information acknowledged with comments Note: Approval or comment does not relieve the Contractor of all obligations covered under contract Discipline: Civil 30 May 20 Date: B 20-May-2020 For Approval J.H CHOI K.S KIM D.H Jeong A 08-May-2020 For Approval J.H CHOI K.S KIM D.H Jeong REV DATE DESCRIPTION Approved Checked Prepared OWNER VAN PHONG POWER COMPANY LIMITED PROJECT Van Phong BOT Thermal Power Plant Project Status □Approved □Approved with Comment □Not Approved □Reviewed OWNER’S ENGINEER Pöyry Switzerland Ltd EPC CONTRACTORS IHI–TESSC–CTCI–DHI CONSORTIUM PROJECT DOCUMENT No REV VP1-0-L4-C-GEN-10025 B DOCUMENT TITLE METHOD STATEMENT FOR CONCRETE REPAIRING WORK EPC EPC DOCUMENT No VP1-0-L4-C-GEN-10025 Doosan Heavy Industries and Construction REV B B B B Revise material according to item 5.1; 5.2 B B B B B B