Summary
Best Landscape & Civil decorative range uses natural materials that can vary in size, shape and colour consistency. These variations cannot be controlled, and may alter the shade and effect of the concrete mix. Each concrete product is unique and therefore imperfections are expected! This is the beauty of decorative concrete.
Our samples are indicative of the colour and the finish, however we do not guarantee that the finished product will conform to the samples and illustrations provided.
The finished surface appearance is highly influenced by concreters’ techniques and workmanship. Please refer to the CCAA recommended practices for placing decorative concrete.
Other elements that can impact the final appearance and serviceability of your concrete include natural variation, placement method, contamination, sub-grade conditions, consistency of surface finishing, excessive addition of water, segregation during handling, installation of jointing systems, type, timing and dosage of surface retardants or release agents, quality and dosage of seeded materials and sealing liquids/compounds, but not limited to.
Best will not be responsible, but not limited to, poor onsite practices, poor placement techniques, weather conditions affecting the performance of the concrete.
All of Best products are supplied on Best’s standard terms and conditions of sale.
Technical Cracking
Be aware that cracking (although undesirable) may occur in concrete products and this in turn can affect the appearance of the finished structure. There are many factors which may cause cracking, but this can be minimised by strictly adhering to the following guidelines. If you pour concrete on hot, humid or windy days, the concrete may be subject to plastic shrinkage cracking, which occurs when the concrete is still plastic or wet. Protecting the concrete surface from drying out will assist in preventing this type of cracking and it is recommended that aliphatic alcohol be applied to the concrete surface after initial ‘screeding’ or ‘floating’. The aliphatic alcohol applies a thin film surface membrane to your concrete and will slow the evaporation rate and keep moisture within the concrete at optimal levels. It should be reapplied each and every time the concrete is “worked” and in accordance with the manufacturer’s data sheet. Always consult your engineer about cracking.
If possible, it is better to simply avoid pouring concrete on days of high evaporation, however, if it is critical to pour concrete on such days, it is essential to ensure that you take steps to prevent rapid drying of the concrete surface. Adding excess water to the mix should be strictly avoided, as this practice will alter the colour, finish and strength of your concrete and increase the likelihood of cracking. Darker colours particularly Black/Charcoal can exacerbate plastic shrinkage which is out of Best’s control.
Cracking due to natural shrinkage is an inherent property of concrete and is predominantly outside the control of Best.
Curing
Curing benefits all characteristics of concrete, it reduces moisture loss, improves the hydration process, the concrete will shrink less, have higher strengths, improve durability and long-term performance. Curing is often overlooked by contractors and is perhaps one of the most important aspects of concrete placement.
Plastic sheeting should not be used at any stage, as the concrete can sweat and cause colour variations due to different hydration rates throughout the concrete. Tape of any form should also not be used on the floor.
For more information contact us or request a quote.
