Australian concrete journal

Custom Concrete Concepts

Materials and method

The unglamorous half of custom concrete — mix design, curing in Australian extremes, UV and sealers, repairs, standards and how to brief a contractor.

A concrete mixer truck on a construction site
Photograph by Mrbobax. Concrete mixer truck.jpg. Wikimedia Commons, CC BY-SA 4.0. Full attributions sit on the image credits page.

Every decorative argument collapses if the mix, the cure or the sealer is wrong. This hub is the workshop floor of the journal: water-cement ratio, supplementary cementitious materials, the first seventy-two hours, the UV that eats a cheap acrylic, the patch that announces itself for a decade, and the codes that actually apply to a house slab.

We are not rewriting AS 3600. We are translating what a homeowner or designer needs to ask before the truck is booked. Decorative mix design, curing in heat, wind and frost, sealers and UV, repairs, AS 3600 and AS 3727, low-carbon mixes and briefing a contractor belong together because they are the same job seen from different ends of the hose.

If you are new to the journal, read a finish piece first, then come here. The pretty photograph is the last ten per cent of the work.

Articles in this hub

A concrete mixer truck

· 8 October 2024

Low-carbon mixes, recycled aggregate and SCMs

A lower-carbon mix is a specification, not a colour. This essay looks at embodied carbon, the real availability of fly ash and slag in Australia, the limits of recycled aggregate on a decorative face, and the questions that separate a plant conversation from greenwash.

Read the article

Concrete formwork on a construction deck

· 28 August 2024

AS 3600, AS 3727 and what homeowners actually need to know

Two Australian Standards govern most house concrete, and they are not interchangeable. This essay translates AS 3600 and AS 3727.1 into questions a homeowner can ask — certificates, engineers, decorative extras versus structural minimums — without pretending a journal article is legal advice.

Read the article

Early damage patches on a concrete floor

· 31 July 2024

Repairing decorative concrete without making it worse

A decorative repair that announces itself is often worse than the original scar. This piece covers colour-match limits, crack types, spalls, overlay versus patch, and the case for documenting the damage before anyone touches the face — then leaving some of it alone.

Read the article

Raw concrete texture

· 15 May 2024

Sealers, coatings and the Australian UV problem

Australian ultraviolet light is a materials test, not a climate footnote. This essay distinguishes penetrating and film-forming sealers, the main polymer classes, chalking and wet-look disappointment, and why a driveway and a kitchen floor remain different recoating problems in the sun.

Read the article

Historic photograph of trucks pouring concrete at a cathedral foundation

· 6 March 2024

Curing concrete in heat, wind and frost

The first seventy-two hours decide whether a decorative surface is a finish or a repair job. This piece covers plastic shrinkage, Adelaide and western Sydney hot winds, tropical rain and alpine frost, and the simple methods that keep water in the slab.

Read the article

Pallet of Portland cement bags

· 30 January 2024

Decorative mix design for Australian work

Colour and finish begin in the batch, not at the trowel. This essay explains water-cement ratio, Australian fly ash and slag, aggregate colour, oxide loading, and how to specify a decorative mix without writing a novel the plant cannot batch.

Read the article