Biện pháp thi công chống thấm dự án Feliz En Vista

Form FEV-RFI-V1.1

Project
Address
Package
Employer
Contractor
RFA Ref. No

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:
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Feliz-En-Vista High-Rise Residential Development
At Plot Y1, Thanh My Loi Ward, District 2, HCMC, VN
Main Contract
CapitaLand- Thien Duc Investment Co., Ltd.
CSCEC32
FEV-CSCEC32-ARCHI-MOS-RFA-006D - Method statement for waterproofing work

REQUEST FOR APPROVAL (RFA)
VINAQS CO., LTD. ;

To

From: CSCEC32 Main Contractor

: RSP ARCHITECTS PLANNERS &

ENGINEERS (Vietnam) LTD

Attention
Descipline

: Dang Thanh Sang; Mai Tran Bich Tram
: Architecture

Subject

: Method statement for waterproofing work

Date to Reply : 19-Jan-18

Name: Wang Shi Wei
Date of Request :
CC:

CL
SCI

R

Project Manager
16-Jan-18

RSP

T&W

ATICHA

VQS

R

JRP
CIDECO

R

DESCRIPTION:
Dear Sirs,

We would like to submit Method statement for waterproofing work.
Please review and approve.

R Critical (03 days)
Normal (07 days)

Regard,

16-Jan-18

CSCEC32- Main Contractor

Date:

Signed:

Name: Wang Shi Wei

REPLY:
This review is for conformance with the general design concept and for general arrangement expressed in the documents. Review shall not be construed to mean that the reviewer accepts the detail
calculations and dimensions shown in the shop drawings or any deviation from the requirements of the contract documents. Contractor is responsible for errors or omissions in the shop drawings; for
meeting all requirements of the contract documents; for confirming and correlating job site dimensions; for information that pertains solely to fabrication process or to techniques of construction, and
for the coordination of the work of all trades. It is understood that the notation on the submittal is not to be construed as an authorization for additional work or additional cost.

RSP comments- 21 Jan 2018:
Examined. No objection with comments:
1. MOS of waterproofing works shall be read in conjunction
with relevant approved shop drawings, approved materials
and the Fosroc's letter ref. no: CV019.4
2. Demonstration for waterproofing works shall be done at
mock up units under manufacturer's witness, recorded in
photos for every step of the work process and submitted to
Architect for record.
3. To supplement specifications for non-shrink grout material
as required via our email dated 21 Jan 2018

Signed:
RSP

The Engineer:

TW

JRP

SCI

ATICHA

CDC

CL

Approved
Not Approved
Date:
Approved with comments but works can proceed on site


METHOD STATEMENT OF FLOOR WATERPROOF WORK
PROJECT:
ITEMS:

FELIZ EN VISTA HIGH-RISE RESIDENTIAL DEVELOPMENT
TOWER A,B,C,D,PODIUM,

PARTY

APPROVAL

DATE

Capitaland- Thien Duc Investment
OWNER

Co., Ltd

CONTRACTOR

CSCEC32

CONSULTANT

RSP ARCHITETS

S

PLANNERS&ENGINEERS(VIETNAM)CO.,LTD

16
9/1/2017

Rev


I. WATERPROOF WORK SCOPE
The waterproofing areas of this project are as follows (for BLOCK A, B, C, D &
PODIUM).
Waterproofing system for roof, all tanks and landscape area will be illustrated in
another method statement.

No

1

Area

Details

Wet area of units (bathroom, powder room,maid’s

1:Tiling or timber

toliet,P.E.S, loggia, shower area, AC ledge, yard, gallery
kitchen)

2:screed and leveling mixed
with waterproofing additive
3:2 coats waterproofing

Common area (refuse chute room ,refuse chamber

2

room,bin center, WC at common area, BOH,M&E
room,lift pit, janitor room)

membrane coating
4:R.C slab.

Note:specific screeding details refer screeding method statement.

II.

Construction preparation

1. Material

1.1 Waterproofing membrane coating: Fosroc Brushbond Flex III or other equivalent
products.

1.2 Waterproofing additive: Mapei-Planicrete SP or other approved equivalent. After
diluted 1:3 with water,the ratio of Planicrete SP:cement:sand is 1:2:6.

1.3 Sealant(Any approved equivalent.)
1.4 Non-shrink grout(Any approved equivalent.)
1.5 Fibre mesh.
2. Tools
Protective clothing:gloves,goggles and mask.
Preparation equipment: Water jetting.
Mixing equipment: 1 KW slow speed drill, 400 or 500 rpm, plus Fosroc propeller agitator.
Application equipment: Stiff brush,suitable spray equipment,roller.
Thickness measuring device: wet film thickness gauge.

III. Floor Waterproofing System
1. Waterproofing work plan


Take the uint C-3BRbE as an example, indicating the waterproof area of each room in the
unit.

PS: waterproof upturn 730mm in sunken a/c ledge, to be illustrated in related shop
drawing.
2. Waterproofing detail for refuse chute rooms


PS: Other common areas will be illustrated in related waterproofing shop drawing.
3. Typical floor trap waterproofing detail.

4. RWDP outlet combine detail


More typical waterproofing detail refer related shop drawing.

IV.

Construction sequence

1. Surface preparation
1.1 Pipe penetration treatment on floor


If the pipe is for floor trap,change step 01 ,04as below, the rest are the same.

1.2 For the embaded pipe on the wall, the pipe groove will be filled by mortar and
make it flat with wall surface after the pipe and shower mixer valve installation on the
wall.

1.3 Corner treatment

Note:create fillet between the walls and floor or walls and walls. (Fillet
size:30x30. Ratio:1:3 cemnt to sand,mixed with Planicrete SP)


1.4 Structural defects rectification
Structural defects such as holes of tie rod on internal wall,honeycomb,blowholes,steel
fixture,which will affect waterproofing application,shall follow related MOS approved by
T&W and rectify before the commencement of waterproofing work.

2. Application
2.1 Pre-wet the substrates and make sure it is well saturated before and during the
application for cementitous/concrete based, 2.0 kg/m2.

2.2 Mixing

( Do not stir the product by hand,. Must be installed in a low speed mixer Stir well.)

2.3 Using brush to apply the 1st layer(500μm) of Fosroc Bushbond Flex III onto the
prepared and damped substrates,0.75kg/m2.


2.4 Using brush to apply the 2nd layer

500μm

of Fosroc Bushbond Flex III onto

touch dried of 1st coat.0.75kg/m2

Note:application of following coat of Fosroc Bushbond Flex III in cross direction by stiff
brush or trowel to obtain a continuous, unbroken film with the next coat applied after the
previous coat has dried, aprx from 2-3hours.

After 1st coat completion, fence the area to protect applied surface.
Using wet film thickness gauge to check&ensure the applied waterproofing membrane
thickness is accordance with manu facturer’s recommendation.

2.5 Reinforcing works to corners and bad condition substrates by a prior layer of

waterproofing and reinforced with netting. The netting should be sandwiched in
between the 1st and 2nd coat.

2.6 Water ponding test.
STEP 1 curb

Build a temporary curb (curb high needs to be higher than 100mm) by surrounding the


extending area of each room,apply waterproofing coats onto the curb.

STEP 2 floor trap&pipe

Block the pipe before water the room. Pipe of floor trap shall be installed at design level(for
full finish only, refer IV 1.1 step 01. For basic and bare finish, pipe will not be cut),water
pipe&soil pipe shall be cut when intall basin and toilet .
STEP 3 watering


Note:During test, applicator shall monitor the water level every 2-3hours a time. Test can
only be qualified with no significant water level drop during the testing period and
inspection by site staff. If not, applicator shall repair coating surface and test again.
2.7 Apply mortar protection layer.
Use mortar to apply a protection layer(approx 20mm) after the water test for
waterproofing membrane succeed. (mortar shall be mixed with waterproofing additive, After
diluted 1:3 with water，the ratio of Planicrete SP(or other approved equivalent):cement:sand
is 1:2:6.)

2.8 Screeding and leveling
Mixed with additive.After diluted 1:3 with water ， the ratio of Planicrete

SP:cement:sand is 1:2:6.
Screeding and leveling work shall follow approved screeding method statement.

V. Water Ponding Test Procedure
After waterproofing work application,test shall proceed within 48h. All
water tests&waterproofing application shall be inspected by site staffs.
1. Procedure applied for full finish units


1st water ponding test
for RC slab
Duration:12h
Water depth:100mm

Fail

Fill up
defects&repair

(OK)

Waterproofing work
application

Repair

12h
2nd water ponding
test(apply before
screeding work)

Duration:48h
Water depth:100mm

Fail

Find out the
cause of failure

(OK)

Mortar protection
layer&Screed&Tiles

Fail

3rd water ponding
test(after finishing
work)
Duration:48h
Depth:100mm

2. Procedure applied for basic finish and bare finish units
1st water ponding test
for RC slab
Duration:12h
Water depth:100mm

Fail

Fill up

defects&repair

(OK)

Waterproofing work
application

Repair

12h
2nd

water ponding
test(apply before
screeding work)
Duration:48h
Water depth:100mm
(OK)

Mortar protection
layer(20mm)

Screeding

Fail

Find out the
cause of failure

VI.

Protection

1. The worker shall ensure that all the installation debris are removed
Progressively before the commencement of the work.
2. After the work completed,the surface must be protected by proper barrier.
3. After bonding test,temporary kerb shall be carefully removed,not to damage
the waterproofing layer applied.
4. Upon completion of works,any construction activities to be not carried out
on the floor unless protective measures.
5. Mortar screed protection on floor must be placed after the water leaking
test.