Commercial Curb Construction Techniques are a vital part of commercial landscaping.

Before even starting to discuss apropos the construction techniques of commercial curbs, it is pertinent to ask a simple yet important question: what is a curb?

What is a curb?

Curb is a short wall or a barrier constructed usually of bluestone, concrete or asphalt. Technically speaking, a curb along with gutter is provided to strengthen the pavement of the road as this holds the pavement from either side. However, there are multiple advantages that come along with it. It separates the yard and/ or footpaths from the road; it guides water for the proper drainage through gutter; it increases the runoff preventing the water seepages which might affect the road itself [1]–[3].

concrete curb construction

Concrete curb construction

Now that we understand what a curb is, let’s get into its types and the materials they use. Most curbs are constructed with concrete and asphalt – concrete being the most commonly used material. Concrete curbs can be

  1. Vertical Curb
  2. Flush Curb
  3. Mountable Curb [3].

curb-types

 

Figure 1 Types of Concrete Curbs [3]

 

How are curbs made?

Contractors installing concrete curbing Boulevard Gardens Melbourne

Contractors installing concrete curbing Boulevard Gardens Melbourne

 

Concrete curbing can be done using two techniques:

  1. Traditional Way – i.e. using stationary forms
  2. Slipforming – i.e. using a slipforming machine

The traditional way of constructing a concrete curb is no different to any other concrete structure construction. The forms of steel, wood or any other material – depending on where you live – are placed and tightened before the pouring of the concrete.

concrete curb formwork

Concrete curb wooden formwork. Boulevard Gardens Melbourne

The concrete formwork is later removed the next day after the concrete hardens and is ready for curing.

 

Concrete curb construction using insitu concrete construction techniques.

Concrete curb construction using insitu concrete construction techniques.

Slipforming, however, is a new method of concrete curbing. The concrete is placed using a machine which has set dimensions of a curb. The concrete is then placed and the machine moves to form the second part of the curb.

insitu concrete curb

A freshly constructed curb using slipforming construction techniques.

 

 

New Concrete curb

New Concrete curb

This type of concrete curbing depends on the setting time of cement used in the concrete. Additional admixtures such as accelerators are usually used in the concrete to achieve a speedy construction process.

Video 1 Slipforming [4]

Decorative concrete curbing is no different, it can be done using both traditional and slipforming techniques – what changes is the type of aggregate in the concrete.

There are some additional things to take care of when constructing the curbs. The curbs – since they are made up of concrete – require joints in order to avoid stresses caused due to thermal expansion. Steel reinforcement can usually be avoided if proper expansion joints are provided at suitable intervals. Curing is another important thing to consider for a good quality concrete curb. The concrete tends to gain its strength over the course of years. However, most of its strength is gained during the first 28 days and therefore proper curing should be provided. The curing time can be shortened in case any accelerator or curing agent is used.

New Concrete Curb curing

New Concrete Curb curing. Joints are provided in order to avoid stresses caused due to thermal expansion.

 

Now that we are done with construction techniques and important things to consider when constructing a concrete curb, let’s talk a little about the application of different types of curbs.

Vertical Curbs serve as barriers in addition to their basic purpose of strengthening and holding the pavement from either sides. The vertical curbs are usually constructed with monolithic gutters which drain off the storm water in order to prevent the pavement from any damage.

Flushed curb is usually serving its main purpose of holding the pavement without affecting the drainage of storm water. The curb is flushed so it doesn’t stop the storm water from making its way to the yard and/ or footpath where the drainage is usually taken care of.

Mountable curbs are designed so as they not only hold the pavement, and guide the storm water but also allow the cars to drive over them. They are usually constructed with vehicle crossovers to allow the vehicles to access private properties which later connect to driveways.

Mountable Concrete curb. Boulevard Gardens Melbourne.

 

We have already come across the vehicle crossovers, let’s take some time to understand what a vehicle crossover actually is and what goes into their construction.

 

concrete driveway crossover

Concrete curb crossover terminology.

The vehicle crossover, as the Town of Cambridge describes it, is a part between your private property and road kerb [5]. The vehicle cross over is usually designed in order to provide support to the pavement and at the same time allowing the passage of vehicles from road to the private property without hurting the people walking or cycling on the footpath.

Figure 2 A Typical vehicle crossover [6]

The vehicle crossover has a trapezoidal plan with splays on its side to allow the vehicles to mount from sides. The vehicle crossovers, very similar to driveways, can be constructed using decorative aggregates. Multiple methods which can used to construct decorative concrete driveways can be used for the vehicle cross over construction as well.

Similar to driveway, the base of the vehicle crossover shall be strong enough to take the loads of vehicles without any damage. A compressive strength of 30 MPa shall be able sustain the loads. Additionally, the concrete provided shall be impermeable so as to allow the runoff of storm water. The drainage of the road should not hinder with the construction of crossover and therefore proper drainage system should be provided. In order to avoid the skidding of cars, an exposed aggregate concrete driveway should be preferred – exposed aggregate concrete provides better skid resistance with reduced traffic noise.

 

Related Landscaping News from Red’s Landscaping Melbourne.

 

7 pluses for Exposed Aggregate Concrete Driveways

 

3 Best Concrete Path Construction Techniques

 

7 Reasons to Choose Concrete Pavement

 

Commercial Concreting

 

3 Best Types of Concrete Retaining Wall

 

In-situ Concrete

 

References

[1]      “What Are Curb and Gutter | Types of Curb and Gutter| Advantages & Disadvantages of Curb and Gutter.” Civil Jungle (accessed Oct. 31, 2021).

[2]      “What is the Purpose of Curb & Gutter? – Asphalt Paving Company: Uniform Paving & Sealcoating.” Uniform Paving (accessed Oct. 31, 2021).

[3]      “Multi-modal Handbook.” Multimodal Handbook (accessed Oct. 31, 2021).

[4]      “GOMACO GT-3600 Concrete Curb & Gutter Slipform Machine, Tight-Radii Island Paving With 3D Guidance – YouTube.” https://www.youtube.com/watch?v=UCgma2_u_E8 (accessed Oct. 31, 2021).

[5]      “Vehicle Crossover Specification.” https://www.cambridge.wa.gov.au/files/assets/public/documents-and-files/infrastructure/engineering/vehicle_crossover_specification.pdf (accessed Oct. 31, 2021).

[6]      “Vehicular Crossing | Hornsby Shire Council.” https://www.hornsby.nsw.gov.au/property/build/permits-and-certification/apply-for-a-permit/vehicular-crossing-permit (accessed Oct. 31, 2021).