If you are looking for premix concrete in Fernvale or the surrounding areas, it is possible that you might have some questions about what is involved in the booking process or the laying of premix concrete. In order to assist you in your preparation, we have compiled a list of considerations and common tasks arranged prior to ordering and laying premix concrete.
Quantity – It is important to determine how many cubic meters of premix concrete is required for your slab. If you fall short in your measurements, this could mean extra charges incurred for delivery. Always add an extra .2 m3 for every 2 m3 of premix concrete ordered.
Strength – Premix concrete strength is determined by the amount of cement powder added to your order. Here is a rough guide to assist you with what strength might be required:
- Footpaths or patios – 20 MPA
- Driveways or carports – 25 MPA
- Heavy vehicles – 32 MPA
Slump – Slump refers to the “wetness” or “runniness” of the concrete. If clients were using a concrete pump for a large slab, they would need at least 100 slump, as this would make the concrete easier to manoeuvre. Projects such as postholes would require a thicker batch of concrete at about 80 slump. Talk with your concrete layer if you aren’t sure on what slump to go with.
Aggregate – All premix concrete has 20mm crushed river gravel added to the mix in order to help strengthened and bind the concrete. There are some jobs where smaller aggregate such as 10mm might be required. If a jobsite requires a pump to distribute the concrete, 10mm aggregate would need to be used in order to avoid blocking pump hoses. If a customers would like to expose their concrete, they would also need a 10mm gravel to achieve this result.
Time onsite – When ordering premix concrete from our office, please specify the time you would prefer the truck to arrive onsite, keeping in mind what time you will have help available.
Boxing & mesh – Have you finished boxing up your slab? And, have you added mesh into the base for strength? It is always a good idea to remeasure your slab boxing – once erect, in order to finalise your premix concrete quantities.
Pouring from chutes or barrowing – What is the access like onsite? Our trucks measure 2.4 meters wide by 3.6 meters high and our chutes extend to approximately 4 meters. Always allow extra room for the truck to navigate around onsite. If there is no room for a truck to enter your site, you will need to consider barrowing concrete to the slab. This requires a few extra helping hands, so please keep this in mind and notify our office when placing your order.
Water onsite – It is very important that you have water onsite for adding to the concrete mix as the trucks arrive. Naturally the premix concrete will lose water content on the way, so the concrete will appear to be slightly drier when it arrives at your job. Water must be added to increase manoeuvrability.
Other considerations – The weather plays a huge role in the success of a premix concrete pour. If there have been a few days of heavy rain, this could prevent concrete trucks from accessing a site due to bogging. If a client decides that they would still like a job to commence after rain, if the truck should get bogged it is the customer’s responsibility to retrieve the truck with heavy machinery. To avoid this dilemma, it is always wise to ensure a site is properly dried out. On the contrary, if a client decides to proceed with a premix concrete pour in the middle of a hot summers day, again we are not responsible for concrete cracking.
Contact ITS Sand & Soil now on (07) 5426 4535 to book in your next delivery of premix concrete.