Working with Concrete: Discover the essential tools & techniques for producing a good result every time.
If you’re building or renovating, chances are there’s a concrete element somewhere within the scope of works. Whether you’re laying a foundation or a footpath, fence footings or a slab for a garden shed, understanding a few key principles around working with concrete will get you started on the right path … concrete path, that is! Achieving good results not only requires skill & understanding but also the right tools. In this guide, we’ll explore the essential concreting tools available at Centenary Hire, as well as some tips on how to use them effectively.
Cement Mixers:
Cement mixers are indispensable for preparing small-medium amounts of concrete efficiently and consistently, not to mention highly preferable over mixing it in a wheelbarrow with a shovel.
Centenary Hire offers two sizes: the 2.2cf (65L) and the larger 3.5cf (98L) mixers. The 2.2cf cement mixer holds 2-3 bags of mixed concrete and will partially fill 1 wheelbarrow, whereas the larger 3.5cf cement mixer holds 4-6 bags of pre-mixed concrete which fills 1-2 wheelbarrows.
These machines save time and effort compared to manual mixing, and also ensure an evenly distributed mix of cement, aggregate and water.
How to Use: Begin by adding about half the required amount of water to the mixer. Gradually introduce the aggregate and then the cement, following the recommended ratios for your project. Allow the mixer to run while adding additional water until the concrete reaches the consistency required for your project.
Petrol Port-A Vibe:
The Petrol Port-A Vibe is a versatile tool designed to improve the consistency of poured concrete by eliminating air pockets which helps to bind the aggregate particles. This results in a denser stronger and more durable finished product, reducing the risk of cracking and improving longevity. Please note: an electric model is available for smaller projects.
How to Use: Directly after pouring the concrete into the formwork, simply plunge the Port-A Vibe into the concrete in a systematic pattern throughout the entire pour. If it is a deep pour, ensure that the vibrating head is held at intervals on the way to the bottom.
Vibrating Shaft Unit:
Similar to the Port-A Vibe, the vibrating shaft unit is used to increase the density and strength of concrete by eliminating air voids. This vibrating shaft is longer than a port-a-vibe making is good for post holes or deep footings. A 6m extension shaft can be added to the vibrating shaft for deep columns.
How to Use: Insert the vibrating shaft into the freshly poured concrete, moving it around to distribute vibrations evenly. Pay special attention to corners and edges to ensure comprehensive compaction.
Screed:
A screed is essential for leveling and smoothing the surface of freshly poured concrete. Centenary Hire’s 3.0m screed, allows for efficient coverage of large areas with minimal effort.
How to Use: Position the screed at one end of the concrete slab, resting it on the formwork or edge guides. With a backward pulling motion, drag the screed across the surface, using a sawing motion to distribute the concrete evenly. Repeat this process until the entire area is levelled.
Bull Float:
A bull float is a large, flat tool used to smooth the surface of freshly poured concrete. It helps to remove imperfections and excess water, resulting in a flat and uniform finish.
How to Use: Hold the bull float by its handle and push and pull it across the surface of the concrete in long straight motions. Tilt the float slightly to assist with filling in any voids or low spots.
Walking Trowel:
A walking trowel, also known as a stick trowel, is a handheld tool with a flat blade usually made of steel. It is used for finishing concrete surfaces to a smooth and hard surface. Trowelling is done in addition to and after using a float.
This is also available as a Trowelling Machine It is particularly useful for larger projects where efficiency is paramount.
How to Use: Wait until the concrete surface has hardened a little and there is no surface water. The trowel can be used in a left to right motion or in sweeping arcs. Long movements will produce a more consistent surface finish.
Edge Tool:
An edge tool is essential for creating clean and crisp edges along the perimeter of concrete slabs. It helps to define the boundaries of the project and enhances the overall aesthetic appeal.
How to Use: Done in conjunction with trowelling, hold the edge tool firmly and run it along the edges of the concrete, applying gentle pressure to create a smooth finish. Repeat as necessary to achieve the desired edge definition.
Mastering the art of concrete work requires years of practice as well as the right tools for the job. However, by understanding the basics, what tools are necessary and how to use them effectively, you can tackle concrete projects with confidence, ensuring durable and visually appealing outcomes every time.
