03/06/2010 Laviosa Chimica Mineraria Spa Products presentation
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03/06/2010
LaviosaChimica Mineraria Spa
Products presentation
2
What’s Bentonite
– Bentonite is a clay mineral of the smectite group.
– The nature of volcanic origins of bentonite deposits give rise to varieties of the mineral that are very often extremely heterogeneous.
Bentonite (hydrofilic clay)
3
ALLUMINIUM
17,1219,19 19,69
16,71 16,8 17,75
22,54
17,2 16,86 18,04
0
5
10
15
20
25
1 2 3 4 5 6 7 8 9 10
Sample
Al2
O3
(%)
C.E.C.
60
120
59
100 99114 115
65,5 70
121
0
20
40
60
80
100
120
140
1 2 3 4 5 6 7 8 9 10
Sample
CE
C (
meq
/100
g)
SILICIUM
58,95 59,05
55,73 54,84 54,72
60,4662,09
59,81
65,12
60,04
48
50
52
54
56
58
60
62
64
66
1 2 3 4 5 6 7 8 9 10
Sample
SiO
2 (%
)
VISCOSITY
60700
5000
0
1000
2000
3000
4000
5000
6000
A B C
Sample
SiO
2 (%
)
How many differences nature can produce…….
What’s Bentonite
4
What’s Bentonite
The elementary particle is a platelet:
every single platelet is about 1 nm thin
� the various platelets are held together in packets by electrostatic
and Van der Waals forces
� they can be exfoliated and dispersed in submicronic particles
5
Its structure, chemical composition and small crystals
dimension impart particular properties to become an
essential raw material for many industrial applications.
Beverage
PaperCeramics
Water Treatment
Plastics
CAT LITTER
Geotecnique
Environment
Building
FOUNDRY
Coatings
Detergency
6
Market sector: Construction
• this is both a thickening, thixotropic and antisettlingagent, that prevents the sedimentation of the aggregates and the bleeding of the surface, it also improves the workability of dry mix mortars
LAVIOKOLL ®
• this is a range of rheological additive suitable for construction systems.
7
LAVIOKOLL ® overview
Laviokoll ®
C0Laviokoll ®
C1Laviokoll ®
C4Laviokoll ®
C10Laviokoll ®
C100Laviokoll®
S1Laviokoll®
S10
Compositionactivated
clayactivated
clay
activated clay w ith additives
natural sodium clay
activated clay
purif ied silicate
purified silicate
Physical form pow der pow der pow der pow der pow derfluid
pow derfluid
pow der
Swelling (ml/2g) 25 27 28 19 44 20 22Liquid limit (Atterberg-
Casagrande) 350 530 600 590 608 496 480BrooKfield
Viscosity at 4% (cps) 15 130 360 15 1500 3000 3200
8
LAVIOKOLL ® flow behaviour
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
0 20 40 60 80 100 120
rpm
cps
Laviokoll C100
Laviokoll S1
Laviokoll S10
0
200
400
600
800
1000
1200
0 20 40 60 80 100 120
rpm
cps
Laviokoll C0
Laviokoll C1
Laviokoll C10
Laviokoll C4
9
LAVIOKOLL ® incorporation
To increase the properties of LAVIOKOLL® C-series it’s better to prepare a pre-gel in water at 7-8% under high shear and add the pre-gel to the system as required. For a better utilization of the product it’s recommended to wait some hours as to let the viscosity built up
Incorporation of LAVIOKOLL ®
LAVIOKOLL ® can be added dry to the formulation and they will develop their gelling ability under high shear dispersion.
10
LAVIOKOLL ® benefits
· less increase of shear strenght
· high increase of plasticity
· promotes anti-sag
· reduction of cost of formulation
LAVIOKOLL ® can be used in partial substitutionof cellulose ethers,
giving some further benefits like:
11
LAVIOKOLL ® improve the sag resistance thanks to yield point, the clay platelets reduce stickiness on the tools and reduce the viscosity during application which significantly improves the tooling properties
- sag resistance
- better workability
LAVIOKOLL ® benefits
TILE ADHESIVES are cement or polymer dispersion based system
cellulose ethers: right consistency for the application, sag resistance of wall tiles, water retention for the optimum hardening of cement and the control of open/correction times
Feature required
12
LAVIOKOLL ® improve• sag resistance of the renderings by providing a fast recovery of the viscosity after application. • the pumping, workability and tooling are easier due to the slip effect of the platelets reducing the friction between sand and cement particles. • the stickiness on the steel float (darby) and trowel is reduced which leads to smoother surfaces.
- Improved workability and tooling
- Improved sag resistance
- Homogeneous surface
LAVIOKOLL ® benefits
RENDERINGS- STUCCO- PLASTERS can be hydraulic hardening cement, gypsum or liquid polymer dispersions.
Features required
13
LAVIOKOLL ® benefits
LAVIOKOLL ® improves sag resistance and workability without negatively affecting adhesion strength.
- Improved handling- Improved sag resistance- Improved pumpability
EXTERIOR INSULATION AND FINISHING SYSTEMS (EIFS) on cement, powder or liquid polymerdispersions.
Features required
They consist of expanded poly-styrene boards, which are adhered to the substrate, reinforced and coated with a finishing plaster
14
LAVIOKOLL ® benefits
LAVIOKOLL ® are used as a stabiliserin gypsum flooring to preventsettling of coarse particles and reduce bleeding of water on the surface, leading to smoother finishes.
- Anti-settling
- Anti-bleeding
GYPSUM FLOORING
Features required
Flooring systems, based on cement, are more difficult to stabilise with clays due to the high pH and the resulting reduced thickening effect
15
LAVIOKOLL ® major application
Laviokoll ®
C0Laviokoll ®
C1Laviokoll ®
C4Laviokoll ®
C10Laviokoll ®
C100Laviokoll ®
S1Laviokoll ®
S10
Cement plaster recommendedLime-cement
renders suitable recommended
Gypsum renders recommended recommended suitableEIFS (Exterior Insulation and
Finish Systems) reccommended suitableTile adhesive
(cement based) suitable suitable recommendedMasonery mortars suitable suitable recommended suitable
Self levelling mortars recommended recommended suitable
resin plaster recommended recommended recommendedLatex tile adhesives suitable suitable
Dry mix
Paste system
16
Bentonite has some advantages and disadvantages vers us cellulose ether
•Promotes anti-sag
•Improves workability
•Improves finishability
•Low cost-in-use
•Prevents bleed
•Provides lubricating effect for machine applied sys tems – reduces pressure and wear
•Does not give water retention
•Will swell and shrink on wet/dry cycling
•Can be used to increase water demand
Cellulose Ether:
•Provides water retention
•Improves open time
•Prevents settling and bleed
•Improves adhesion under dry conditions – wet conditions show no improvement
•Will not provide anti-sag properties unless very high viscosity grades are used, or modified (high viscosity grades
do not give best workability)
17
LAVIOKOLL ® competitors
LAVIOKOLL ® competitors tableproduct mineral system
Bentone GS ectorite modified
Bentone OC- Bentone CT ectorite
Benaqua 4000 ectorite + polisaccaride
Bentone EW ectorite highly purified
Bentone LT ectorite + HMC
Optibent MF silicato layered dry/mix mortar
Optibent 602
silicato layered activated and organically modified dry/mix mortar
Optigel WMbentonite and xantham
gum paste system
Optigel WXbentonite and xantham
gum paste system-
Optigel CK smectite paste system
Pangel S9 sepiolite dry mix
Pangel S15 sepiolite dry mixPangel C150 sepiolite modified dry mix
Attagel 40- Attagel 50 attapulgite 10-15%
main features application OUR CONTERTYPEImproved workability and thixotropy cement LAVIOKOLL ® C100
Avoid sedimentation and bleeding used with cellulose ether
gypsum flooring -cement- tile adhesives
LAVIOKOLL ® C1-LAVIOKOLL ® C100
Improved workability and excellent anti-settling – increase open time and water
retentionCan partially replace cellulose
ethers in tile adhesives LAVIOTHIX ® SE
Avoid sedimentation and bleeding excellent anti-settling
LAVIOTHIX ® P100-LAVIOKOLL ® S1
Improved workability and thixotropy LAVIOTHIX ® SEAnti-settling in cement system- stable in
system with high calcium ions screed- block fillers- flooring
Increase the hydraulic hardening Cement based tile adhesives LAVIOKOLL ® C4-LAVIOKOLL ® C1
High thickning properties- increase the water retention
in latex based system in addition to Optibent- syntetic- LAVIOTHIX ® SE
High yieldin latex based system in
addition to Optibent - silicate LAVIOTHIX ® SEGood anti-settling and anti-sagging without
viscosity increasing pH 2-13LAVIOKOLL ® C1-
LAVIOKOLL ® C100
Mortars and plasters LAVIOKOLL ® S1Mortars and plasters LAVIOKOLL ® S10Mortars and plasters
If used alone without associative thick don’t reach high viscosità- usually used with
cellulose LAVIOKOLL ® C100
18
End of presentation
Thanks for your attention!
www.laviosa.itwww.laviosa.it
19
The crystallographic basis of montmorillonite is 2:1 layered structure a
single layer of aluminium octahedron between two sheets of SiO4
tetrahedrons
The dimension of the platelet is 1 nm of thickness and 1 mm of lenght.
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