the function of polymer dispersion powder in cement … · 2019-09-18 · apfac 1. congresso lisboa...

CREATING TOMORROW'S SOLUTIONS

THE FUNCTION OF POLYMER DISPERSION POWDER IN CEMENT BASED DRY MIX PRODUCTS

Klaus Bonin, LBE T5, 25 November 2005

APFAC 1. Congresso Lisboa 2005Klaus Bonin, LBE T5, 25 November 2005, Slide 1

INTRODUCTION

Ceramic Tile Adhesive; ETICS; Ceramic Tile Grout; Self LevellingUnderlayment / Overlayment; Plasters; Concrete Repair Mortars; Gypsum trowelling compounds; Sealing slurries and Powder Paints.

Blending organic with inorganic binders such as cement, gypsum, and hydrated lime. After setting it creates final product properties.

While mixing the dry mix formulation with water, the dispersion polymer powder becomes dispersed and after drying it will become water insoluble. This process is not reversible and it’s the reason for the big success of dispersion powders in the world

The dry mix formulation has several advantages like packaging, transport and handling, costs, freeze resistance, resistance to biological attack.


CONTENT

• POLYMER BASE

• SPRAY DRYING PROCESS, DISPERSION – REDISPERSION

• TYPE OF CERAMIC TILE

• ETICS POLYSTYRENE, EOTA ETAG 04

• MEMBRANE BENEATH CERAMIC TILE

• HYDROPHOBICITY OF PLASTERS


CONTENT

• POLYMER BASE



• ETICS POLYSTYRENE, EOTA ETAG 04,




VINYLACETATE-ETHYLEN POLYMER BASES

Copolymer of ethylene, TG of -93°C (polyethylene) a nd vinyl-acetate TG of + 33°C (polyvinylacetate). The final TG of the copolymer is controlled by the structure and composition. Ethylene works as an internal plasticizer, there is no need for a plasticizer.


CONTENT

• POLYMER BASE







SPRAY DRYING PROCESS

Dispersion RedispersiblePowder

Redispersion

Drying

Redispersion in Water

ProtectiveColloid

Drying


DISPERSION – REDISPERSION

RE-DISPERSION

particle concentration particle concentration

92

ppm

92

ppm

69

ppm

particle size in µmparticle size in µm

DISPERSION

particle concentration particle concentration

69

ppm


CONTENT

• POLYMER BASE







ACC TO 12004

0

0,2

0,4

0,6

0,8

1

1,2

1,4

1,6

earthenware tiles stoneware tiles porcelain tiles

N/mm² 0,5% Dispersion Powder 2,0% Dispersion Powder 6,0% Dispersion Powder

Tile WA: acc EN 159 15% acc to EN 178 is < 0.2 % next to 0.0%.


INTERFACE MORTAR - PORCELAIN TILE

mortar tileScanning electron micrograph of the interface between a dispersion polymer-modified ceramic tile adhesive (left) on a porcelain tile (right).

The polymer films at the interface between the surface of the porcelain tile and the cementitious mortar can be seen clearly.


CONTENT

• POLYMER BASE







100% STYROPOR PULL OUT

EOTA = European Organization for

Technical Approvals

ETAG = European Technical Approval

Guideline

ETAG 04

To save energy

“heating and cooling”


INTERFACE MORTAR - EPS

Scanning electron micrograph (a = x400; b = x3000, of the interface between a polymer-modified mortar (left side of the picture) on EPS (right side of the picture).


IMPORTANT REQUIREMENT ETAG 04

without crack formationstandard > 3 Joule, high resistance >10

Joule

Ball-falling-test, impact energy

normal resistancehigh resistance

> 0.25 N/mm²Tensile strength of adhesive on concrete slab

> 0.03 N/mm² (2h) > 0.08 N/mm² (7d)

> 0.08 N/mm²Tensile strength on polystyrene panel

wet (+ drying time befor test; h = hour, d = days) stored in water

dry, standard condition 23°C

and 50% relative humidity

www.eota.be


VARIATION OF POLYMER CONTENT

66721.5< 0.5J

Impact test in Joule, on 200x200x50mm³ test specimen,

500g steal ball falling test

98958261350%EPS pull out (adhesion failure

within the styropor)

0.130.140.120.110.080.06N/mm²Tensile adhesion strength on

EPS, 12 d sc. / 2 d water

100100927980%EPS pull out (adhesion failure

within the styropor)

0.140.150.140.120.080.05N/mm²

Tensile adhesion strength on EPS 14 days sc. (s.c. =23°C /50%RH)

5 %4 %3 %2 %1 %0 %DPPDispersion polymer powder


CONTENT

• POLYMER BASE







FUNDAMENTAL REQUIREMENTS FOR WATERPROOFING MEMBRANES FOR USE BENEATH CERAMIC TILES ACC. TO EN 14891

> 0.75 mmCrack bridging ability

No penetrationWaterproofing under hydrostatic pressure (1.5bar / 7d)

> 0.5 N/mm²Tensile adhesion strength after contact with lime water

> 0.5 N/mm²Tensile adhesion strength after heat ageing

> 0.5 N/mm²Tensile adhesion strength after water contact

> 0.5 N/mm²Initial tensile adhesion strength


CRACK BRIDGING ABILITY

0

0,2

0,4

0,6

0,8

1

1,2

1,4

1,6

1,8

28 d sc 14 d sc + 14 d water

11% OPC 20% Dispersion powder 8% OPC 45% Dispersion powdermm

Measurement of elongation in mm, after two different storage condition; 28days standard condition s.c. and after 14 days standard condition plus 14 days water storage, wet measured.


COMPOSITE TENSILE ADHESION STRENGTH

0

0,5

1

1,5

2

2,5

3

28 d sc 7 d sc + 21 d water 14 d sc + 14 d70°C + 1 d sc

freeze / thaw

11%OPC 20% Dispersion powder 8%OPC 45% Dispersion powder

Adhesion test according to the EN 14891, after different storage condition

Sealing slurry applied directly on the concrete slab. Adhesive applied by a trowel, 30s pressed into the mortar with a 20N weight.


CONTENT

• POLYMER BASE



• ETICS POLYSTYRENE, EOTA ETAG 04,




HYDROPHOBICITY OF PLASTERS

0

0,5

1

1,5

2

2,5

3

3,5

4

0,5 1 2 3 3,5% hydrophpbic dispersion powder

water absorption coefficent W

21 days norm climate 1 year free weathering 6 years free weathering

Measured according to the DIN 62517 standard. Test specimen was laid out 6 years on the free weathering in Burghausen 60°/south.


SUMMARY

• Polymer modification brings to the mortar:

• adhesion

• cohesion

• flexibility / elongation

• impact resistance

• durability

• hydrophobicity


Thank you for attention.

Klaus Bonin

the function of polymer dispersion powder in cement … · 2019-09-18 · apfac 1. congresso lisboa...

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