IMPERMEABILIZZAZIONE dei GIUNTI di MOVIMENTO-dilatazione-contrazione-taglio. Hydrophilic Waterstops for concrete construction joints. Waterstop designed for use in MOVING Joints. Waterstop per Giunti di dilatazione, contrazione, taglio, Giunti di moviment

● what ... is työJOINT ^® bentonite waterstop system ?

1- it is a waterstop system in order to waterproof MOVEMENT JOINTS.
2- it is the only one waterstop in BENTONITE for MOVEMENT JOINTS.
3- it is only waterstop system in BENTONITE for MOVEMENT JOINTS equipped with progressive and

permanent POSTCOMPRESSORS (patent pending).
4- it is the only one waterstop for MOVEMENT JOINTS that work correctly in 3D (in three directions)

without limitations.
5- it is the only one waterstop for MOVEMENT JOINTS that work in 3D, with the ability to

compensate differentiates movements centimetrics, maintaining the efficiency of the barrier intact

against the water.
6- it is the only one waterstop system in BENTONITE for MOVEMENT JOINTS that annuls the bypass

actions caused by the breakdowns/imperfections of the concrete around to the JOINT.
7- it is the only one waterstop system in BENTONITE for MOVEMENT JOINTS that waterproofs

immediately (for means of the bentonite) and increases its characteristics during the life time

(for means of the POSTCOMPRESSORS).
8- it is the only one waterstop system in BENTONITE for MOVEMENT JOINTS that - in only one

model - can be adapted to:

- whichever thickness of foundation SLAB

- whichever thickness of wall

- whichever width of the pour separator

9 - waterstop in bentonite for of MOVEMENT JOINTS available also for strongly polluted or salt water
10 - waterstop supplied complete of accessories
11 - waterstop simple/elementary to apply

● how does... waterproof työJOINT ^® bentonite waterstop system ?

1- it waterproofs the extraback (outside) of the ZONE around to the movement JOINTS regarding a

reinforced concrete structure.
2- it prevents to a liquid (often water) go through

- the MAIN WAY: the crevice formed by separation of two pours of concrete

- and the OTHER WAYS that are present in the STRUCTURE of the reinforced concrete JOINT

(see - section 2)

● from what ... is composed työJOINT ^® bentonite waterstop system ?

1- Bentonite:

it is the ACTIVE/WATERPROOFING element of työJOINT^® waterstop system.
It is granular natural sodium bentonite said of "FIRST stage" for the

immediate waterproofing. The mass of the dry bentonite of "FIRST stage" of työJOINT^®

is 5 Kg/m approximately (50 % of the total).

2- SperrJOINT^®40:

manufactured article in natural granular sodium bentonite with delayed hydration, works as

"SECOND stage" with the function of permanent and progressive POSTCOMPRESSOR (patent

pending) of the "FIRST stage" in bentonite.

The bentonite mass of "SECOND stage" of työJOINT^® is 5 Kg/m approximately (50 % of the total)
3- Basic POLYSTRIP: strip of geotessile in polypropilene
4- Nails: for powder actuated tool to fix työJOINT^® to the reinforced concrete structures.

● What is the POSTCOMPRESSOR "SperrJOINT^® 40"

SperrJOINT^®40
it is a plastic tube, in blown extruded thin film, filled of sodium bentonite granular natural and

sealed to the extremities.

1- the plastic of the tube is of the family of soluble plastic (made up of PVOH) with modified formula,

worked in microextrusion blown proces.
2- dimension of the tube: nominal diameter = 40 mms, - nominal length = 600 mms
3- nominal quantity of bentonite: Kg 1,25/m
4- locking up of head of the pipe: type hermetic with metallic CLIPS
5- how it works:

the plastic tube allows to the contained bentonite to begin to activate itself (expand) after

approximately 6 ÷ 8 days of continuous contact with the wet, and it allows to develop in

progressive way the total activation (total hydration and expansion) of työJOINT^® in along time of

20 ÷ 30 days of continuous contact with the wet

● how ... it works työJOINT ^® bentonite waterstop system ?

The waterproofing (leak proofing barrier to the water) of the Movement Joint happens through työJOINT^® bentonite waterstop system, in Two constructive times, but without solution of continuity:
    a - in Horizontal: before/during the construction of the foundation SLAB.
    b - in Vertical: after the landfill of excavation of the underground structure.
1- työJOINT^® waterstop system waterproofs immediately.   The immediate waterproofing happens with the

hydration / EXPANSION of the alone granular natural loose sodium bentonite (of "FIRST stage") contained in

työJOINT^® waterstop system, after the contact with the first wet. The bentonite mass "the FIRST stage" in

työJOINT^® is of 5 Kg/m approximately (50 % of the total).

2- ¿¿ HOW MUCH EXPANDS the granular loose bentonite in this phase?

It expands until the balance of the expansive forces:

a - in HORIZONTAL: until balancing of the passive force of foundation/structure build until the moment of the

first hydration / EXPANSION of the bentonite.

b- in VERTICAL: until balancing of the passive force of the landfill, "NOT still steadied/sedimented"

3- With the stabilization of the starting forces (the active / expansive force of the bentonite and the Low passive

forces of foundation / structure and of the landfill), the "VOLUME of RESULTANT BENTONITE GEL" (volume

occupied by the bentonite GEL of the first hydration) turn out to be significant/HIGH.

The bentonite has used surely a number greater than TWO, of its potential volumetric expansion in order to

reach the equilibrium of strengths; this is caused by "holes" of the landfill fresh made and caused by the low

compactness of the ground under the foundation due to the low cargo/weight of the structure that is in a

beginning step of the building construction.
4- The main characteristic of this first BENTONITE GEL is a low value of expansive inner residual force with low

value of FINAL ELASTIC COACTION .
5- The ELASTIC COACTION state is the state in which an elastic solid is when it shows distributed internal forces,

even if in absence of external sollicitations.

The value of the FINAL ELASTIC COACTION of BENTONITE GEL determines the level of SELFCOMPACTION of the

same GEL and indexes the RESIDUAL EXPANSIVE POTENTIAL.

The value of RESIDUAL EXPANSIVE POTENTIAL, is directly proporzional to the ability of the bentonite GEL to

tough out changes/significant volumetric deformations (as in the movement joints) with a practically unchanged

Permeability and unquestionable characteristics SURE barrier against the water .

6- the "first VOLUME of the granular natural sodium BENTONITE GEL of the MOVEMENT JOINTS", tends to modify

form/parameters, because of deformations/movements above all cut movements, correlated to growing of the

building load.

7- The bentonite contained in the POSTCOMPRESSORS of työJOINT^® waterstop system, because of its

remarkable delay of hydration/expansion, enters in action when the "VOLUME of BENTONITE GEL of FIRST stage"

practically is stabilized and in phase of light reduction/thickening, caused by the building increased load and by

the settlement/sedimentation of the landfill.

8- A bentonite contained in the POSTCOMPRESSORS SperrJOINT^®40, represented by 5Kg approximately of dry

bentonite (50% of the total ) for linear meter of Movement Joint, will have so an expansion cubic with an

extremely low value; so the expansion produced by the hydration of the bentonite of the POSTCOMPRESSORS,

supplies only a strong thickening of the first bentonite GEL produced from the granular bentonite unpacked,

being mechanically occluded other expansive holes.
9- The high density and the synergy of two GEL, give to työJOINT^®bentonite waterstop system one high potential

expansive force that determines the stabilization of the TOTAL bentonite GEL, with a HIGH VALUE of a internal

FINAL ELASTIC COACTION .

10- The big BENTONITE GEL mass for linear meter of työJOINT^® (supplied from 10 Kg/m approximately of total dry

bentonite) and the HIGH STATE of internal STABILIZED ELASTIC COACTION (determined by the

POSTCOMPRESSORS - SperrJOINT^®40), give to työJOINT^® bentonite waterstop system the suitable

characteristics in order to carry out the function of TOTAL barrier to the water when it is employed in

STRUCTURAL MOVEMENT JOINTS also with differentiates centimetrics movements in 3D (three directions).

työJOINT^®

movement JOINTS bentonite waterstop

- expansion, contraction, cut of - in underground structures in groundwater

CROSS direction A A

HORIZONTAL direction B B

VERTICAL direction C C

to waterproof Movement Joints with "PLASTIC" EXTRUDED Waterstop

● as a "PLASTIC" EXTRUDED Waterstop works

the "PLASTIC" EXTRUDED Waterstop does not work

in 3D- in 3 directions

In the MOVEMENT JOINTS a PLASTIC EXTRUDED waterstop,

applyed in TWO or THREE DIRECTIONS, has always at least

one section subjected to SPLITTING.

An even small movement of the JOINT, will cause

SURE BREACH of the PLASTIC waterstop at least

in a sector.

A PLASTIC WATERSTOP applied in "RING" sketch

or "U" sketch, WORKS correctly

ONLY for movement in HORIZONTAL direction.

HORIZONTAL direction movement ........B B

The "PLASTIC" EXTRUDED waterstop in the photo on the left, works correctly only for VERTICAL movement of the JOINT.

●complex APPLICATION of a PLASTIC waterstop

PLASTIC waterstop

form

anchorage

first CAST

second CAST

PLASTIC waterstop

second CAST

first CAST

●●if you think NOT TRUE the statements under written,

use easy-going the PLASTIC EXTRUDED waterstop

1- The PLASTIC extruded waterstop does not work in 3D. They crack for VERTICAL and CROSS relative

movements.
2- The PLASTIC extruded waterstop, can generate a concrete crack for concentration of the efforts

lines.

3- The water can pass around to the plastic joint going through the empty space created by

concrete shrinkage.

4- The water (bypassing the waterstop) pass through the normal imperfections of the hardened

concrete: honeycomb, crevices, settling...).
5- The water crossovers the waterstop (bypassing the waterstop) if also a small part of the plastic

waterstop extruded wings "curls up" for bad fixing or damage during the cast of the concrete.
6- The water crossovers if along the all waterstop lenght, also a SINGLE small hole (from damaging)

or also a SINGLE small pore (welding defect) is present.

7- rebars with special shape is always necessary to insert plastic waterstop.

conclusion

The waterproofing of MOVEMENT JOINTS of underground reinforced concrete structures with "PLASTIC" extruded WATERSTOP is:

- EXPENSIVE (products, work, ...)

- COMPLICATED to realize (rebars with special shapes)
- it does not work in 3D: its use for operation in 3D is a IMPROPER technical chosen

- it does not compensate centimetrics cut movements.
- Sure LEAKS of water will be had: must be only verified if are small or LARGE.

The reasons:
- functioning designed with limit and inability to work in 3D
- Crevices and honeycomb of the concrete,

- shrinkage around/under to the rebars(settling),
- shrinkage around to the same waterstop,
- not perfect splices/weldings
- bad application,
- damaging during the concrete casting.

- breach of sections of the waterstop caused by bi-three-dimensional direction of movement ....

Use only a PLASTIC extruded waterstop in order to waterproof JOINTS of MOVEMENT

(with possibility of movement in TWO or THREE directions), is a WRONG CHOICE

PLASTIC waterstop

form

REBAR with SPECIAL design

to insert a PLASTIC waterstop

reinforcement

anchorage

reinforcement

second CAST

form

first CAST

●REBAR with SPECIAL design to insert a PLASTIC waterstop

●"breakdown" of a PLASTIC waterstop

PLASTIC waterstop

concrete breakdown

caused by the PLASTIC waterstop

BREACH of the PLASTIC waterstop for vertical/cut movement of the JOINT

●●how EXTRUDED EXPANSIVE hydrophilic RUBBER waterstop works ?

- the expansive hydrophilic rubber waterstop have

the ability to create a barrier to the water, but only against

the water that cross through the MAIN WAY

of the MOVEMENT JOINT (see the JOINT at section 2).

- The MAIN way is the structural passing crevice made

by the separation of two near concrete cast that can

move among them in 3D (in 3 direction)
- the "barrier-waterstop" is in contact (only in the

"main way of passage of the water") for a max height

of 2 cm approximately, with the two concrete

"shoulders" forming the movement joint. ONLY on

these TWO small areas the "barrier-waterstop" effects

its expansive force in order to realize a barrier to the

water at condition that "it does not existe" crevices

or honeycomb on the faces of the JOINT.
- the application is made by glueing on dry support.
- the amount of movement that the "waterstop" is able to compensate with its expansion, it is

nearly never indicated: this movement is supposed millimetric, unidirectional, horizontal and very

rarely in 3D (three directions).

Conclusion

the expansive hydrophilic rubber waterstop LEAKS OUT water: the water gets through the "other ways", it must be only check - in order each single application - if the WATER LOSS is little or BIG.

<<<< hydrophilic RUBBER waterstop

to waterproof Movement Joints with EXTRUDED HYDROPHILIC RUBBER waterstop

BELLCAST bentonite Waterstop for Movement JOINT

työJOINT^®type A patent pending

New 3D - Tridimensional Bentonite Waterstop System for Structural movement Joint with patented postcompression

työJOINT^®typeB patent pending

New 3D - Tridimensional Bentonite Waterstop System for Structural movement Joint with patented Postcompressors + bentOKraft^® panels system

"settling": "half-moon" hole under the rebars that are generated

by the plastic shrinkage.

The settling realizes a labyrinth of water passage way.

water percolation along the reinforcement bars, passing through the

"settling", or percolation facilitated by bad characteristics of the

concrete mix design, by the bad laying, or reinforcement bars

concentration, ...

beginning carbonation with pH decay and the consequent beginning

of the oxidation of the iron reinforcement.

crevice by hygrometric shrinkage and

"disruption" of the abutement stones caused

by the expansive outthrust of the

reinforcement rust

carbonation and beginning of structural disruption

crevice caused by hygrometric shrinkage

G - Segregation of the fresh concrete with formation of honeycomb for incorrect MIX DESIGN, bad

working of the wet concrete, ...

H - Segregation of the fresh concrete with formation of honeycomb caused by a high rebars

concentration

● ● The OTHER ways of passage of the water

● typology of a movement

JOINT in concrete structure:

in the underground structures, the humidity and the temperature are

approximately constant, therefore:

1 - the movement of expansion-contraction practically tend to zero.

2 - the meaningful movement of contraction, is alone beginning and

has had to the cooling of the heat of the hydration of the second

concrete pour.

The movement of expansion or shrinkage of the stone materials

is approximately 10µ/°C/m

3 - the more important movement is the "cut" movement, had to the

settlement of the two contiguous structures foundations

(above all if with various weights): the mvement can arrive to some centimeter.

● "DIRECTION" of the movements JOINT

The two concrete structures forming the MOVEMENT JOINT, in the cargo phase and until the stabilization of the foundations, can have a 3 D relative movement between of them (in the three directions)

● ● The MAIN way of passage of the water: the crevice

To waterproof a movement joint means:

- to prevent that a liquid (often water) pass through the MAIN way:

the dynamic crevice formed by the separation of two concrete pours,

not jointed by "crossbar" or other, can move between them in 3D

(in 3 direction)

- to prevent that a liquid pass through the OTHER ways present in

the two reinforced concrete STRUCTURES of the JOINT

(sees some example in the photos below).

to know

the MOVEMENT JOINT of buried structures in groundwater in order to correctly waterproof

LINEA DIRETTA LAVORI

new

The Bentonite

Company

CASA ASCIUTTA

repair of waterproofing ?

yes... we can

with BELLCAST... is safety

partners area:

BELLCAST srl sede Legale Amminis

*BELLCAST srl* sede Legale Amministrativa: via DIAZ, 18 - 37121 VERONA - Italy sede Operativa: via Igino Nicolis, 16 -37014 Castelnuovo del Garda fraz.Sandrà-VERONA- Italy R. E. A. 302806 - VR P. IVA 03007470234
	CONTATTI - CONTACT
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Email	bellcast@bellcast.com
© Copyright 2006-2011-BELLCAST s.r.l. -Verona -Italy =All rights reserved

Bellcast ha messo a punto akuyBell^®system

riparazione definitiva di impermeabilizzazioni di strutture in falda SENZA SCAVI

building construction and... the water			search engine
NEW Constructions - in groundwater		EXISTING Constructions - leakproofing barrier REPAIR
TOTAL or only VERTICAL new leakproofing barrier		without EXCAVATION BUILDING in underground water GARAGE, CELLARS, tanks . seepages from underground water also with SEA water	without removing the roof-GARDEN seepages of water from roof-GARDEN Brick floor slab PREDALLES floor slab Reinforced concrete floor slab	without disassamble the floor seepage of water from Floor SLAB sea level - GARAGES, SQUARES, COURTS Brick floor slab PREDALLES floor slab Reinforced concrete floor slab
bentOKraft^® panels BENTONITE PANELS
also with SEA water


	*how much does it* *COST* ? 1, 2, 3 ...
			without EXCAVATION without removing the roof-GARDEN without to disassamble the floor . akuybell^® system is a Bellcast technology
	Bellcast performs new waterproofings and repairs of waterproofings with problems directly with own workers
“OPEN DIG” system “DIAPRAGM" DIG DIG with "BERLINER" DIG with "PILES"
		akuybent^® system is a Bellcast technology for MAJOR WORKS in groundwater