CONCRETE PROTECTION CONCRETE PROTECTION MATERIALS & TECHNIQUESMATERIALS & TECHNIQUES

CE 402CE 402

DONE BYDONE BY

AHMED AL-HAWASAHMED AL-HAWAS

FAYEZ AL-SAIKHANFAYEZ AL-SAIKHAN

OUTLINEOUTLINE

INTRODUCTION.INTRODUCTION.

CONCRETE SURFACE SEALERS.CONCRETE SURFACE SEALERS.

FRP.FRP.

No protection No protection meansmeans!!! !!!

This is Why protection is This is Why protection is neededneeded

More durable.More durable.

Less cost .Less cost .

( maintenance and repair)( maintenance and repair)

To know how costly is the To know how costly is the repair:repair:

This reflects the This reflects the importance of importance of

protectionprotection

protection techniquesprotection techniques

The key is: permeability. (How)? The key is: permeability. (How)?

It should be minimized by:It should be minimized by:

1-low w/c ratio.1-low w/c ratio.

2- adequate cement content.2- adequate cement content.

3-control of aggregate size and grading.3-control of aggregate size and grading.

4-use of mineral admixtures.4-use of mineral admixtures.

Providing adequate concrete cover .Providing adequate concrete cover . Limiting the crack width on concrete Limiting the crack width on concrete

surface .surface .

Providing waterproof membranes on Providing waterproof membranes on

concrete surface .concrete surface . Applying protective coatings on steel Applying protective coatings on steel

surface .surface . Installing cathodic protection system .Installing cathodic protection system . Concrete surface sealers.Concrete surface sealers. FRP. ( fiber reinforced polymer) FRP. ( fiber reinforced polymer)

Materials used for protectionMaterials used for protection

Equipment used in protectionEquipment used in protection

Two protection materials were Two protection materials were selectedselected::

Concrete surface sealers.Concrete surface sealers.

FRP. ( Fiber Reinforced Polymer)FRP. ( Fiber Reinforced Polymer)

Concrete surface sealersConcrete surface sealers::

Concrete sealers are Concrete sealers are finish coatings used to finish coatings used to protect the concrete.protect the concrete.

    Sealers act to Sealers act to prevent damage from prevent damage from traffic, water and traffic, water and chemical agents. chemical agents. 

Sealers reduce the Sealers reduce the porosity of concrete porosity of concrete and prevent water and and prevent water and dirt from getting into dirt from getting into the concrete.the concrete.

Types of SealersTypes of Sealers::

Film FormersFilm Formers::

creat a barrier on the concrete’s creat a barrier on the concrete’s surface. surface.

used for : enhancing exposed used for : enhancing exposed aggregate colored concrete since aggregate colored concrete since they are shiny.they are shiny.

PenetratesPenetrates: :

--These sealers penetrate into These sealers penetrate into the concrete. the concrete. 

-They get 1 to 4 millimeters -They get 1 to 4 millimeters into the concrete to into the concrete to increase water repellency. increase water repellency.

-Unlike the film formers, they -Unlike the film formers, they do not leave a sheen or do not leave a sheen or gloss.gloss.

Which Type of Sealer to Which Type of Sealer to UseUse??

Depends on:Depends on:

-What do you want the surface to look -What do you want the surface to look like ?like ?

-What type of maintenance are you -What type of maintenance are you willing to do?willing to do?

film formers film formers glossy finishglossy finish

penetrate penetrate matte finish OR slip-free matte finish OR slip-free surfacesurface

Examples on sealersExamples on sealers::

AcrylicAcrylicsiliconesiliconesilanesilanesiloxanesiloxaneResinResinwax forms wax forms

Sealer ApplicationSealer Application::

Surface PrepSurface Prep::

- - clean the concrete surface before sealing.clean the concrete surface before sealing.

- coat the floor for 10 to 15 minutes- coat the floor for 10 to 15 minutes . .

Apply Sealer:Apply Sealer:

    Clean Up:Clean Up: - Wash up with warm soap and water immediately. - Wash up with warm soap and water immediately.

   

Fiber Reinforced Polymer Fiber Reinforced Polymer (FRP)(FRP)::

For years, civil engineers have For years, civil engineers have been in search for been in search for alternatives to steels and alternatives to steels and alloys to combat the high alloys to combat the high costs of repair and costs of repair and maintenance of structures maintenance of structures damaged by corrosion and damaged by corrosion and heavy use. heavy use.

Fiber Reinforced Polymer Fiber Reinforced Polymer (FRP) is a relatively new class (FRP) is a relatively new class of composite material of composite material manufactured from fibers and manufactured from fibers and resins (and has proven resins (and has proven efficient and economical for efficient and economical for the development and repair of the development and repair of new and deteriorating new and deteriorating structures in civil engineering. structures in civil engineering.

FRP StructureFRP Structure

composed of : carbon composed of : carbon or glass, provide the or glass, provide the strength and stiffness. strength and stiffness.

The matrix commonly The matrix commonly made of polyester, made of polyester, Epoxy or Nylon, binds Epoxy or Nylon, binds and protects the fibers and protects the fibers from damage, and from damage, and transfers the stresses transfers the stresses between fibers.between fibers.

Manufacturing OF FRPManufacturing OF FRP: :

They are pre-engineered and pre-fabricated in a They are pre-engineered and pre-fabricated in a shop, then assembled and installed at a bridge shop, then assembled and installed at a bridge site where a wearing surface is added.site where a wearing surface is added.

Applications of FRPApplications of FRP

as in bridges and as in bridges and columns built columns built completely out of completely out of FRP composites FRP composites have demonstrated have demonstrated exceptional exceptional durabilitydurability, and , and effective resistance effective resistance to effects of to effects of environmental environmental exposure exposure

Advantages of FRPAdvantages of FRP::

Light weight . ( Light weight . ( FRP deck FRP deck 25 psf - 25 psf - Concrete deck Concrete deck 119 119

psf psf ))Resistance to de-icing salts and other Resistance to de-icing salts and other

chemicals. chemicals. Ease and Fast installation .Ease and Fast installation .Reduced traffic delay .Reduced traffic delay .Good durability .Good durability .Long service life .Long service life .Cost savings Cost savings

Disadvantages of FRPDisadvantages of FRP::

Higher initial cost compared to a conventional Higher initial cost compared to a conventional concrete deck. concrete deck.

Lack of design standards and conventions Lack of design standards and conventions for material characterization for material characterization

Limited FRP experience within the construction Limited FRP experience within the construction industry.industry.

FRP's low modulus of elasticity leads to a FRP's low modulus of elasticity leads to a deflection driven design which does not allow a deflection driven design which does not allow a designer to fully capitalize on the FRP's strength designer to fully capitalize on the FRP's strength

Thank you for Thank you for listeninglistening

Questions Questions pleaseplease………………