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Beijing IWHR-KHL Co., Ltd., China Tel: +86-10-6852335 6 68781384 Address: A1 Fuxing Road, Beijing, P. R. China (10 0038) Fax: +8 6-10-68529680E-mail: duzhk@ iwhr.com [email protected] Website: www.khl.com.cn

1

GB-EPDM cover

GB filler

Corrugated rubber waterstop

Flat steel

Foam plastic

GB sealant

Mortar

PVC cushion

Cement mortar

GB-copper waterstop

Neoprene rod

Timber

Rubber rod

L steel

Expansion bolts

Embedded bolts

GB Waterstop Structure of Perimetric Joint of CFRD

Features of GB Waterstop Structure from top downward:

l GB-EPDM protective cover, an independent defense line with high aging resistance.

l Corrugated rubber waterstop supported by a rubber rod, specially designed to the

action of joint deformation and impounding pressure.l GB filler, cold paving rubber plastic filler, with excellent flow sealing ability and high

workability on the site.

l GB-copper waterstop, with GB sealant plates adhered to the two wings of the copper

to improve its side imperviousness. The loop size of the copper is also specially

designed.

®

http://www.khl.com.cn/http://d%7C/duzhk%40%20iwhr.com


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Rubber rod

Rubber waterstop

GB filler

GB-EPDM cover

Face slab

Foam plastic

Timber

GB sealant

Cement mortar

Plinth

Flat steel Expansion bolts

PVC cushion"F" shape GB-copper waterstop

Traditional Waterstop Structure of Perimetric Joint of CFRD

GB series waterstop materials for CFRD joint includes:

l Corrugated rubber waterstop

l GB filler

l GB sealant

l GB-EPDM cover

Typical Waterstop Structure of Vertical Compression / Tension

Joint of CFRD with GB Series

Cement mortar

Rubber cushion

L steel

Rubber rod

GB-EPDM cover

GB filler

Expansion bolts

Face slab

"W" shape copper watershop

®



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Hongjiadu CFRD, Guizhou, China, 2004.

Dam height: 179.5m

(GB waterstop structure and GB series

waterstop materials were used.)

Qinshan CFRD, Fujian, China, 2000.

Dam height: 122m

(GB waterstop structure and GB

series waterstop materials were

used. Less than 5l/s leakage

occurred until now.)

The upper reservoir with CFRD of

the Ming Tombs pumped storagepower station, Beijing, China, 1995.

(Full upper reservoir seepage

controled with GB series waterstop

materials.)

Applications



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5

Corrugated Rubber Waterstop

Substitute to the central bulb waterstop

Designed adaptable to the joint action,

easy for installation and quality inspection

Description

Uses

Advantages

Specifications

Item Unit Index

Hardness (Shore A) Degree 60±5

Tensile strength MPa ≥ 15Extensibility % ≥ 380

70 ,℃ 24h % ≤ 35Compression set

23 , 168h℃ % ≤ 20

Tear strength kN/m ≥ 30

Low-temperature brittleness ℃ ≤ -45

Hardness variety (Shore A) Degree ≤ +8

Tensile strength MPa ≥ 12Heat aging

70 , 168h℃ Extensibility % ≥ 300

Ozone ageing (50pphm: 20%, 48h) － DegreeⅡ

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In the traditional joint waterstop structure of CFRD, a central bulb waterstop is

buried in joint concrete to serve as the middle dense line. Due to the poor

compactness of the concrete surrounding the waterstop and the deficiency of

deformation ability of the central bulb, this kind of waterstop has been proven

to be improper to perform its role of waterstop in joint.

In GB waterstop structure, the corrugated rubber waterstop is fixed by bolt on

the joint concrete surface to substitute the central bulb waterstop. The size of

the corrugated part is specially designed to absorb the joint deformation.

In China, corrugated waterstop has been widely used in CFRD joint,

especially those higher than 100 meters. Recently, it is also accepted by the

designer of Bakun CFRD of Malaysia.

Corrugated rubber waterstop is normally fixed by bolts on the top of

perimetric joint of CFRD, underneath the GB filler.

l Reliable connection to joint concrete (Compared with the traditional

buried central bulb waterstop).

l Designed deformation ability to absorb joint moves.

l Easy of installation and quality inspection.

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GB-EPDM Cover

Pretective cover for the plastic filler

Excellent ageing resistance,

high tensile strength and good flexibility,perfect adhesion to the plastic filler and concrete

Description

Uses

Advantages

Specifications

Layer

nameItem Unit Index

Hardness (Shore A) Degree 65±5

Tensile strength MPa ≥ 7.5

Extensibility % ≥ 450

Tear strength KN/m ≥ 25

Low-temperature brittleness ℃ ≤ -45

Tensile strength retentivity % ≥ 80

Extensibility retentivity % ≥ 70Heat aging

(80 , 168h)℃

Appearance of extensibility 100% － No crack

EPDM

layer

Ozone ageing

(500pphm, 40 ×168h,℃ extensibility 40%, static)－ No crack

Extensibility (23±2) ℃ % ≥ 300

Density (20℃) g/cm3

≥ 1.15

Workability (25℃) 0.1mm ≥ 70

GB

Sealant

layer

Peel strength N/cm > 10

GB-EPDM cover is a composite rubber plate composed of EPDM (Ethylene

Propylene Diene Monomer) plate and GB sealant layer. It can be used both as

a protective cover for the plastic filler, and as an independent defense line for

the top waterstop of CFRD.

As a waterstop composite material for waterstop, it presents a multiple

function. With the perfect resistance to ozone and heat ageing, EPDM layer is

a protective layer at the external surface; undersurface, GB sealant is applied

to solve the poor adhesion of EPDM layer with GB and concrete.

l Protective cover to the plastic filler for top waterstop of perimetric joint,

tension joint or compression joint of CFRD.

l Accustomed application under adverse conditions: sunlight, intense heat,

heavy humidity or chilly environment.

l Improve the flow ability of the plastic filler on the joint of CFRD.

l Resistant to ozone and heat ageing.

l Proper tensile strength and flexibility.

l Perfect adhesion to the plastic filler and concrete.

l Good adaptability to sunlight, intense heat, heavy humidity or chilly

environment.l Easy to installation.

®



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Intersections

T shaped cover connecter Turning cover connecter

l Special intersections are very important in the waterstop system of

CFRD. The quality of intersections which connected perimeter joint

and vertical joint or different size waterstop will affect the waterstop

result directly.

l In view of this, many types of intersections have been developed tomeet the requirement. After tentative application, these intersections

are proven to be feasible practically.



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Install of corrugated waterstop

GB placing by hand

Install of GB-EPDM cover

Filling of GB filler

Installation of GB-EPDM cover

Instructions for Use

Installation of Corrugated Rubber

Waterstop

l Concrete surface should be dry, compact and sound;

l Clean concrete surface from dirt, oil, grease;

l Apply SK adhesive on the surface according to the adhesive

instruction. In case of wet surface, special adhesive should be

used.

l Pave GB filler by hand as seeing in the photo.

l Clean the concrete surface;

l Lay waterstop into the groove of joint entrance;

l Drill hole on the rubber and concrete by blow hammer;

l Fix waterstop on concrete by the expansion bolts.

l Clean the concrete surface;

l Lay cover into the groove of joint entrance;

l Drill hole on the cover and concrete by blow

hammer;

l Fix cover on concrete by the expansion bolts.

®



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BBBeeeiii j j jiiinnnggg IIIWWWHHHRRR---KKKHHHLLL CCCooo...,,, LLLtttddd...,,, CCChhhiiinnnaaa

CONTACTS:

Contact Person: Mr.Du Zhenkun Ms.Chen Xiaolei

Tel: +86-10-68523356 68781384

Fax: +86-10-68529680

E-mail: [email protected] [email protected]

Website: www.khl.com.cn

Address: A1 Fuxing Road, Beijing, China (100038)

CCeerr ttiiff iiccaattee ooff CCoonnff oorr mmiittyy ooff IISSOO 99000011 22000000

QQuuaalliittyy SSyysstteemm CCeerr ttiiff iiccaattiioonn

CCeerr ttiiff iiccaattiioonn ooff CCoonnvveennttiioonn PPaatteenntt

Name: the Structure and Method of the Top

Filling of Face Slab Joint of CFRD

Patent No.: ZL 99127395.8

Patentee: Beijing IWHR-KHL Co., Ltd.

Issue Date: 07. 11. 2001

®
mailto:[email protected]

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