New Article Posted

August 10th, 2010

Finally, I have had a few days away and have had a chance to update the website, add some new images and post a new article.  I am looking to add a heap of new content soon including a lot more new articles.  Especially on polished concrete and resurfacing.

Dry Shake Colour Hardeners vs Integral Colours For Concrete

August 10th, 2010
The two most widely-used methods to add colour to freshly-poured concrete are integral colouring admixtures and dry-shake colour hardeners. Their biggest appeal is the vivid and lasting colour that they give, which is resistant to fading. Not only this, colour hardeners can also make concrete surfaces harder and more durable. So, which should you use for your project?
Introduction: What are these colourings?
When added to concrete, integral colouring admixture will give the entire concrete surface a consistent colour. Typically, it is made of iron-oxide pigments (natural or synthetic) blended with wetting agents and mixed well into fresh concrete before it’s placed to achieve uniform colour. Integral colours come in liquid, granular and powdered forms. They can be added directly at the batch plant or to the mixer onsite.
Unlike integral colours which colour the entire matrix of the concrete, dry shake colour hardeners colour only the surface (top 2mm – 5mm) of a concrete slab. They are a blend of pigments, wetting agents, finely-graded silica sand and Portland cement. Colour hardeners are available in powdered form and are tossed or hand distributed onto wet concrete. Usually, dry shakes are used to colour concrete overlays or stamped concrete flatwork because the rich colour of the surface make imprints appear sharper.
Advantages
Integral colour: Using this is more convenient and less labour-intensive.  You simply mix it into the concrete, then place and finish the concrete as you normally would. The colour is permanent and will remain even if the concrete’s surface is scraped or chipped. Integral colours are made with chemically-stable pigments that resist fading even with long-term exposure to UV light or weather elements.
Dry shake colour hardeners: They are available in a lot more hues and shades than integral colours. Various colours can be mixed to create contrast as well as subtle variations in colour to mimic natural stone. The colours produced are more intense because they are concentrated on concrete’s surface. They make concrete surface denser and stronger because of the Portland cement and mineral aggregates in their content as well more resistant to abrasion, moisture and de-icing salts. They are often the choice for exterior floors like concrete driveways that are subjected to freeze-thaw cycles and interior floors that get a lot of heavy traffic.
Disadvantages
Integral colour: The colours are less vivid than what can be achieved with dry shakes. Integral colours with an iron-oxide base come only in red, black and yellow and all other hues, except green and blue shades, are produced by simply mixing the basic colours in different proportions. Greens and blues are created with different mineral oxides so they cost more. Additionally, integral colour costs more than colour hardeners.
Dry Shake Colour Hardeners: Dry shakes affect just a thin portion of the surface so the colours are more prone to wearing. Generally, their use is limited to flatwork. Its biggest drawback is its labour-intensive and messy application. It could take an average of 6 man-hours to cover a concrete surface about 150m2. The amount of work required can translate to bigger costs compared to using integral colours. Also, structures, landscaping and existing concrete slabs need to be protected from the airborne powder during dusting. Workers must also wear a dust mask to prevent inhaling the harmful powder.
Conclusion
Both options have distinct advantages and limitations that you should consider to find out which one would be more suitable to your type of project, desired colour and the exposure conditions in the area.

Surfers Paradise Stage 1 almost complete

August 9th, 2010

It has been a very busy few months.  The north section of the Surfers Paradise Foreshore upgrade is almost complete.  The works have involved many different coloured concrete slabs on ground in exposed aggregate concrete broom finished.   The works have also involved concrete seating which will look very effective once completed despite the funny looking colour that has been chosen.

With about 1 week to go we should have about a week break to regather ourselves to attack the southern end which is about twice the size.

I have attached a couple of images but they dont really do the job justice.

Some Different Options For Resurfacing Your Concrete

May 13th, 2010

Most people believe that there is no solution to old cracked or discolored concrete but to remove and replace it if you want to improve the appearance of your concrete surface. However, there are several options to makeover an old dull concrete driveway, walkway, patio or any other concrete surface without having to tear out aging concrete and install a new one.

Is the Surface Suitable for Resurfacing?

Before anything else, though, you need to determine whether the concrete can actually be resurfaced. There are no complex steps here. All you need to do is inspect the concrete surface to make sure it is in sound condition. If there are widespread, large, or deep cracks, heaving or damage from freeze/thaw conditions or if the soil has begun to settle, then it would not be feasible to resurface the concrete. If you are not sure what to do, ask a concrete professional to check out the concrete.

Here are some of the different decorative concrete resurfacing options:

  • Overlays – This option has several types to produce a wide range of patterns. Among the choices include stampable overlays that mimic the appearance of brick or natural stone; microtoppings that can produce either a troweled smooth or textured finish; self leveling overlays which are the thickest and results in a smooth even surface; and spray down overlays that give a textured, highly-durable and skid-resistant surface ideal for pool decks and sidewalks. Spray down is the best to use with stencils. A spray down stencil finish is in fact the most widely used option for concrete resurfacing in Australia.
  • Staining – In this option, you’re not just adding a solid color to a concrete surface.  Because stains seep into the concrete, it produces rich semitransparent color effects and can even mimic the look of stained wood or polished marble. Because the properties of different concrete surfaces vary, the effect of staining is also different every time and it is this uniqueness that makes it appealing.
  • Decorative Stencils – Stenciled concrete patterns can be created on an existing concrete by placing the stencil over the concrete surface and then applying a thin decorative coating onto it. The stencil exposes some parts of the concrete to the coating and blocks other parts to create the desired pattern. There are several ways to apply stencils including trowelling down, spray down and using adhesive stencils.
  • Saw cutting – This method can create various patterns onto a concrete surface from grids and geometric shapes to more intricate designs like images. The concrete is saw cut after it has hardened. The pattern can be later stained to create a contrast with the adjacent concrete. Different color stains can also be applied on a pattern.
  • Engraving or etching – Special tools are used to etch designs into concrete. This is a permanent surface treatment unlike overlays because the surface is carved with the pattern. It can be followed by staining for even more striking results.

As you can see, the options for concrete resurfacing are many, creating a lot of possibilities for upgrading the look of aging concrete. However, as pointed above do take the time first to check whether concrete resurfacing is the right option for your concrete space.

New Project Awarded – Surfers Paradise Foreshore

May 13th, 2010

Great news.  We have just been awarded the concrete works for the 25 million upgrade at the Surfers Paradise Foreshore.   This is a very high profile project run by Abigroup and we have been brought on board sub contracting through Scape Shapes Landscaping.

The job involves all sorts of different concrete finishes and once completed will really give the Beach Front at Surfers Paradise a real face lift.

Work is expected to start next week and our team are all looking forward to it.

Here is some more information on the project here:-

http://www.surfersforeshore.com.au

Pool Surround – Decorative Saw Cuts

May 1st, 2010

This job we recently completed for a client in Nerang came out very nice and they were very pleased with the look.

It is integrally coloured concrete with a heavy sponge finish (for traction as it is around a pool and the clients have children) and 1.5m X 1.5m decorative saw cuts.

Initially they wanted to get stamped concrete until I gave them some more info on this finish.  It always looks great.

I was a little concerned with how the cuts were going to look at the back of the pool because of the curved shape and the fact that it is only 1.2m wide.  I was worried how the cut would look but it came out really nice.  They picked a great colour too which was “Lemon Cream” in Holcim’s colour range.

Here is what they had to say:-

Awesome job Cory,  we are so happy thanks a million

Andre & Kim

Some Very Loud Concrete Resurfacing

May 1st, 2010

commercial This is a project we did a week or two back at a school in Ipswich.  It was for a commercial landscaper.  The colours, as you can see, were very vibrant. Especially the bright blue colour.  The colouring the architect chose were from the CCS Range.  Brick Red with the “Cut Stone” stencil, Blue Grey and the very bright Byron Blue.

The photos dont really do the job justice as the landscaping has not been done yet and the over spray on the sides detracts from the look.

I will post new images once the landscaping has been completed.

Exposed Aggregate Concrete and a very happy client

May 1st, 2010

For this project the client chose a blend of two different aggregates. Part of Hammercrete’s range.

The mix was 70% “Orange Swirl” and 30% “Imperial Gemstone”.  The job came out very nice and will look excellent once the landscaping is done.

The client was very happy with the finished product. Here is what he had to say:-

Thanks for the great job, it looks fabulous, even better than I expected.

Of course you would be most welcome to drop in after we landscape, it may be a month or two, but that would be great.

A very professional Job and I wish you well in all you future work.

Regards,

Jeff

Simple Yet Classy Finish

May 1st, 2010

We have been very busy as of late and one finish that is definitely very popular is this.

This is a integral coloured driveway with 1.5 m X 1.5m wide decorative saw cuts.  The client picked an excellent colour to go with the house and using a wider than normal 6mm blade really helps give the cuts more emphasis.

Flexible Overlay. Does it work?

April 26th, 2010

I have heard a lot of hype around the place about a flexible overlay being installed by a certain company who claims that there cement topping can bridge cracks and flex so much that cracks will not re-appear!  When I first heard of this I must admit I was very impressed as with everyone else who works in installing cement overlays.  Especially as I have never seen anything else around advertised that claims to do what this product does. This “Super Product” apparently costs a great deal more than most overlays as you would expect if it could do what it was said that it could do.

I have seen a video online which shows this product on a piece of board which is bent over and the overlay doesn’t break.  It does look very  look very impressive.  The obvious major flaw that I can see with this is that I have never seen a piece of concrete which bends like a piece of plastic.  Concrete cracks are caused by many things and one of the most common , if not the most common, is from the concrete settling and cracks opening up and the concrete pulling apart.  This usually will result in the concrete crack continually opening and closing or with some settling even moving up or down.  Not bending like plastic.

I could imagine that with minor shrinkage cracks that this product may work.  In saying that though, most crack repair carried out with an epoxy filler and done properly will do the same if not a better job.

Recently I went out to a project where the client had a driveway to a residential complex and they needed the resurfacing repaired and the previous installer had repaired the driveway and used the “flexible” topping which cost them a small fortune.  To my amazement there were many obvious cracks over the driveway.  In this case there must not have been much flexing happening with the product.

Here are a couple of photos I took while I was there.

I am sure that one day soon there will be a reliable overlay developed which does exactly what this says it does but we are not there yet.