How To: Cutting Concrete Blocks

A lot of the times whole concrete blocks will not fit into the place where they are intended to fit. Because of this, you are going to have to cut them down to the appropriate size. There are a few ways in which you can go about cutting these types of blocks. The method that you ultimately choose will likely depend on how smooth or rough you want the cut to be. Also, it is going to largely depend on the type of tools that you happen to have at your disposal. Below we will discuss some of the most frequently used tools for cutting these types of blocks.

Frequently Used Tools:

1. Hammer and Chisel

hammer and chisel

One of the most frequently used tools is the hammer and chisel. In order to utilise this tool effectively, you are going to need to be sure that you have the appropriate safety gear. You will want to wear goggles in order to protect your eyes. You will also need to wear gloves to protect your hands.

Below we will discuss the steps that someone is going to need to take in order to successfully cut concrete blocks with a hammer and chisel.

a.) Mark the layout

The first thing that you are going to have to do is mark the layout of the actual cut that you are going to perform. You will want to make the layout all the way around the actual concrete block by using a straightedge in order to keep the line as straight as possible. You should also use chalk in order to make the line visible enough to see in different lighting conditions.

b.) Safety glasses and gloves

As noted previously, you are going to want to be sure that you have the necessary safety gear. For cutting concrete blocks with a hammer and chisel you will need; gloves, safety glasses and a dust mask to keep dust out of your face and your lungs.

c.) Score the block

You will need to score the blog along the line that you created with the chalk. You will want to do this with the chisel tool, as well as a strong hammer. In order to do it effectively, you need to apply strong and swift blows to the concrete. This will ensure that the concrete is penetrated and that it breaks. You should make a score around 1/8 of an inch deep to start.

d.) Strike

The next thing that you have to do is strike along the actual scored line. You need to use the same chisel and hammer that you used in the previous step. This time, you will need to apply strong and swift hammer blows to the line. If done properly, the block should then break into two different pieces with a rough cut along the line that you had previously scored.

2. Power Saw

power saw

The next tool that you should use is a power saw. This is an excellent tool that is extremely powerful and versatile and you can find at just about any hardware store. If you are in need of efficient, effective, and accurate cuts, this is going to be one of your best options available on the market. Below we will discuss some of the steps that you need to take to ensure that you do it properly.

a.) Choose a circular or power masonry saw

The first thing that you need to do is choose either of the saws mentioned above. You will want to carefully look at each option and consider the pros and cons of each. Consider what you are going to be doing with the saw and what features you care most about. Once you have chosen one, you are then going to want to be sure that you outfit the saw with a masonry or diamond blade according to whichever is appropriate.

3. Safety Materials/Tools

safety gears

The next thing that you are going to need to do in order to ensure that you cut the concrete safely is wear safety glasses, ear protection and a good dust mask. All of these are necessary for the safe operation of a power saw because you are going to have a lot of debris flying around and it is also a very loud machine. These safety essentials are going to help ensure that you do not suffer any type of injury that could have been easily prevented.

a.) Set the measurement

The next thing that you must do is set the measurement of the actual saw blade. This is an important step. This is a step that you must do correctly in order to get an accurate cut. Always figure out how deep you want the cut before actually doing it. You should generally use either 1/4 to 1/2 inch deep of a cut.

b.) Cut around the block

Once you have cut around 1/4 to 1/2 deep, you are then going to want to cut around the entire block. You should adjust your blade so that it will cut 1/4 to 1/2 inch deeper than you previously cut. You will be required to make a number of passes through the block until you have actually cut through the entire block. In this case a power saw will be able to produce a much cleaner and accurate cut than chiseling can produce.

4. Block Splitter

concrete block cutting service

A block splitter is another type of tool that you could use in order to cut concrete. You can use this type of tool if you want a very powerful machine that will get the job done fast. Below we will discuss some of the things that you are going to need to do in order to successfully use this type of tool for block cutting.

a.) Rent or purchase a concrete block splitter

Most people are likely to need to rent this type of tool from their local hardware or tool rental store. This is likely to be the case because these tools are fairly expensive. Therefore, it is not really in your best financial interest to invest in one if it isn’t going to be used frequently.

b.) Place the concrete

The next thing that you are going to want to do is place the concrete in the right location. You will need to ensure that the concrete is placed on the platform that is directly located beneath the actual blade for cutting. This will ensure that the blade will slice into the block when it is cutting. In order to ensure an accurate cut, you need to be sure that the block is placed in the exact location of where you want the cut to be made.

c.) Secure the block

The next step involves securing the actual block in place by spinning the wheel that is used for tightening. You should spin the wheel in a clockwise direction in order to tighten it.

d.) Pull the level

The next step involves pulling the splitting level downward and applying enough pressure on the actual level in order to effectively split the concrete. You will know you did this correctly if the tool effectively splits the concrete. The cut is likely to be very precise in terms of cutting it where it was supposed to be cut. However, the cut is likely to be just as jagged as a cut that is made by hand with a chisel.

In order to effectively get your concrete cut in a professional way, you will likely need to hire the job out to a third party. Cutting concrete is something that takes a lot of power and experience to do effectively. For this reason, you are going to want to hire an experienced team that has access to the latest and greatest tools and machinery. This will ensure that you find someone that is going to be able to really deliver the best possible results on your job.

You will also want to ensure that the job is completed on time. Nothing is worse than hiring a company only to see them miss their deadline. In order to find a reputable company in this industry, you need to ensure that you do the necessary research in order to find one that has a good and solid reputation within the industry. You will also want a company with competitive rates in order to get the job done efficiently.

If you are looking for exceptional block cutting services in Australia, look no further than MegaSaw. MegaSaw is going to be one of the best options for block cutting services in Australia. Below we will discuss exactly why you should consider hiring MegaSaw for your block cutting services.

Why Hire MegaSaw?

1. Best Tools and Machines

By far, the number one reason to hire MegaSaw is because we are a company that invests in the top-of-the-line machinery. Block cutting is all about having the right tools and machinery in order to get the job done. Even the most experienced and best cutters are going to have a hard time producing the results that a good power saw can produce.

2. Experience

Another reason why you are going to want to hire MegaSaw is because we have extensive experience in this industry. In fact, we have been supplying concrete cutting and drilling services for over 40 years.

3. Customer Satisfaction

Another reason to hire MegaSaw is because we take pride in our ability to satisfy every client. We have numerous satisfied clients and customers that have left overwhelmingly positive testimonials on our website. You can check them out for yourself.

4. Pricing

We offer some of the most competitive rates in the entire industry.

5. Deadlines

We know how bad it can be to have a company miss deadlines. We pride ourselves on our ability to hit every single one of our deadlines. We are 100% committed to our customers’ deadlines whenever we accept a job. No matter what, we will complete the job that we take on within the given timeframe.

6. Quick Quote

We also offer a 24-hour turn around on a quote for your specific job.

As you can see, there are plenty of reasons to choose us for your block cutting needs. Not only are we experienced in this field, but we also offer competitive prices and rates. We are 100% committed to our customers and we will strive to ensure their satisfaction. We offer quick quotes so we can get started on your job right away. We also ensure that we will finish the job within a given timeframe. If you are ever in need of concrete cutting or drilling, you know who to call. We will take pride in having you as a customer and we look forward to being able to help you solve your problems.

Benefits of the OHS Act Concrete Cutting and Drilling Regulations

The Occupational Health and Safety (OHS) Act has laid down some strict guidelines for the Australian workforce. The regulations are there to protect the workers by making various demands of the employers. Workers who cut and drill concrete will see several regulations introduced that are designed to make their job safer. Below are some of the benefits those workers will enjoy.

safety gears

Controlling Risks

One of the benefits that come from strict government regulations is an increased focus on controlling the risks of the job. It’s now the employer’s job to control all risks whenever it is reasonably possible to do so. If it is not so, then it’s still their job to reduce the risk as much as possible.

Employers can control risks in different ways such as replacing the hazardous job with a safer alternative, isolating the hazard using barriers or specialised equipment or controlling the risk using mechanical and electrical tools.

Administrative procedures are used to control as much of the remaining risks as possible. If there are still risks after administrative controls are implemented, then employers must supply personal protective equipment to control the remaining risk. This could include sunscreen, helmets, and specialised clothing.

If there is any risk in the workplace, then the employer must do everything possible to mitigate this risk. All of this lies on the shoulders of the employer thanks to the OHS Act. It makes the job safer for all of the workers involved. This is one of many changes that came from this act that helped to improve the workplace for construction workers cutting and drilling concrete.

Reducing Exposure to Gas and Dust

One of the many hazards that comes with concrete cutting and drilling is a prolonged exposure to large quantities of dust. Much of this exposure could be to silica dust, which can lead to the development of a serious medical condition known as silicosis.

The equipment itself can generate high volumes of toxic exhaust fumes. This includes equipment powered through hydraulic packs or internal combustion engines. The toxic fumes can reach dangerous levels when the equipment is used in a poorly ventilated area.

It’s up to the employer to identify and control these risks under the OHS Act. There are strict regulations in place to reduce the worker’s exposure to these dusts and gases while working. For example, equipment used for drilling and cutting concrete should be fitted with extraction devices whenever it is possible. This is to eliminate the majority of dust produced when drilling.

The production of dust can also be reduced using wet cutting techniques. It also helps keep the blade cooler, which prevents it from cracking or breaking free. They may also be advised to use slower tools to produce less dust. Fans should always be used to keep the area ventilated properly.

Reducing Damage from Vibration

The equipment used for cutting and drilling concrete tends to vibrate a lot. This can lead to damage of the vascular system, nervous system, and even the spine. It can also causes workers to suffer from extreme fatigue, headaches, and hearing problems. It’s one of those things that was overlooked for too long, but is now controlled thanks to the OHS Act. It’s now the employer’s responsibility to make running the equipment as safe as possible for the workers.

One way this risk is mitigated is by purchasing specialised equipment that does not require manual support to operate or equipment that is specially designed for minimal vibrations. Equipment that is balanced and light tends to vibrate less. It’s also best if the equipment can be held in either hand to reduce stress on one particular side of the body.

Most modern equipment is manufactured with handles designed to absorb much of the vibration. There should also be an even surface to allow for an equal distribution of force when holding the handle. If there aren’t handles like this, then consider using rubber lagging around the handles to absorb the vibration.

Developing Safe Methods of Work

Under the OHS Act, it’s the employer’s job to develop a safe working environment for any job with a potential risk. Almost all concrete and drilling jobs involve risk, so the employer typically considers these before every job. It’s mandatory to create a safe work method statement when the work is considered high-risk.

What is High-risk Work?

If the work is more than two metres above the ground, then it’s considered high-risk. It’s also high-risk if there is asbestos involved. Other work considered high-risk include: If there’s a need for temporary support to keep a structure standing during work or any work performed in small, confined spaces, in shafts, or in tunnels.

Work performed near or on railways in use or roads in use as well as jobs near bodies of water are considered high-risk. Also any job in an environment which has extreme temperatures, either hot or cold. In any such work environment, the employer must design a safe work method statement.

Creating one of these statements requires the input of the workers involved and the health and safety representatives. It must outline all potential risks of the job and how they are to be controlled. As mentioned above, the employer is obligated to control all of the risks associated with the job.

How to Cut Concrete Pavers Effectively

Are you installing a new concrete paver at your home? A paver is a great way to decorate the lawn. It’s also useful for creating a level walkway between your door and your driveway. Unlike old fashioned concrete pouring techniques, laying pavers is much simpler. All you need to do is create a level surface and then piece the individual pavers together to create the walkway. It can be adjusted to just about any length and width you require.

However, it’s very rare that your patio or walkway will have perfect dimensions. Perfect dimensions mean the pavers fit without needing to cut any away. Chances are, you’ll have to make some cuts and adjustments to the concrete to get everything to fit together nicely. It’s best to let a professional do this work to ensure you get a precise, high-quality job. However, this is something you can do yourself if you have the patience, confidence and the tools.

man laying patterned brick pavers

You have a few different options when it comes to cutting your own concrete pavers. It depends on the tools you have available at the time.

Cutting your Pavers with a Hammer and Chisel

Your first option when it comes to cutting your own pavers it to use the old fashioned paver cutting technique: the hammer and chisel. This technique is extremely simple and doesn’t require any power tools. It does take time and elbow grease. You’ll also have to pay close attention and hit your marks if you want everything to fit perfectly.

First and foremost, you should always be wearing safety goggles if you are cutting the pavers yourself. Using the chisel and hammer tends to send a lot of debris flying in different directions. Don’t run the risk of blinding yourself for your walkway.

Use the chisel to scratch a line where you want to make your cut. You’ll then hold the chisel directly against that line. Slowly bump the chisel with your hammer. Don’t rush it. Make slow, steady, and forceful blows against the chisel. It may take two or three blows before the paver finally splits. If the paver splits with uneven edges, you can use the chisel to chip and smooth these edges.

Splitters and Guillotines

Splitters and guillotines are specialty tools designed for cutting stone and concrete blocks. Most splitters rely on hydraulic power to get the job done. Operating them is extremely simple and safe.

You load the paver into the splitter at the appropriate spot. You’ll then press down on a lever that squeezes together two large, steel blades. It makes a clean and accurate cut through the paver. Hydraulic splitters make the job much easier, but there are also manual splitters. A manual splitter will require more force to operate.

Splitters provide some of the best cuts, but if you’re only paving a small area, then you don’t want to shell out the money to buy your own, as they can be expensive. You can always just rent the equipment for the time needed. If you are renting the splitter, provide the rental company with enough information so they can provide you with the appropriate model of the right size.

Cutting Pavers with a Saw

Most people who cut their own concrete pavers use a hand held saw. A Stihl saw or skill saw will both work for the job. You’ll need a work horse for the job so selecting one with adjustable sides should work best. However, the average blade won’t be enough to get the job done. You’ll need a blade with either carbide or diamond-tipped edges. This will allow it to cut through the stone or concrete. A blade meant for cutting wood will not make it through the paver and could damage the blade and possibly even the saw as well.

Even with the right blade you must be careful with your cuts. It’s usually best to start with a light cut. Raise the blade and don’t penetrate the paver entirely on the first run over the mark. You then lower the blade and finish the cut on the second pass over the mark. Some people even extend it to a third cut before cutting all the way through.

You can also use a table saw instead of a hand held saw. It works in much the same way and you will still need a special blade to cut through the pavers. Table saws tend to be more powerful than hand held saws. You may not need to perform multiple passes to cut the slab. This could make the process faster.

Hire a Professional

Whether just for cutting or the entire installation, your best option is always hiring a professional contractor. This is true for commercial and residential projects. After all, most paver walkways will be seen by anyone who approaches the home or business. They are a reflection of the property itself and should look professional.

Cutting concrete pavers can be dangerous, laborious, and time consuming work. Trying to handle it all yourself without access to high-grade tools only makes it worse.

If you want it to look good, then it should be cut by professionals using high-grade professional equipment. This means guillotines and splitters designed for cutting concrete pavers. Fortunately, there are a lot of companies in Australia that offer professional paver cutting services.

How to Control Dust When Cutting Concrete

Construction workers are exposed to dust when dealing with concrete that might be harmful to their health. The three main types of construction dust are:

Silica dust

Usually present in sand, granite or sandstone, Silica is a natural mineral. It’s also found in other materials used for construction such as mortar or concrete. During the cutting, grinding or drilling process, the mineral is broken into fine dust which is referred to as silica dust.

Non-silica dust

Although silica is the main component of most materials used for construction, there are a few that don’t contain the product or the content is very little. These compounds include limestone, cement and marble. There is a chance that these compounds could get mixed with those containing silica so in the end, the fine dust contains silica.

Wood dust

During construction, wooden bars may be used for support for other users. The wood might either be used as softwood or hardwood depending on the type of construction. There are also wood-based compounds often used during the construction process. As such, when the wood is cut using saws, the wood dust is likely to cause harm to the construction workers if preventive measures are not in place.

Health Effects

If you’re not properly protected when handling these types of dust, you need to know the type of damage they are likely to cause. There are many construction workers who have fallen ill due to lung cancer, silicosis, asthma or COPD (chronic obstructive pulmonary disease).

For health risks such as silicosis, a form of lung disease, there is a chance that a few construction workers might experience the side effects later on. However, for those without proper protection, the symptoms set in when the contractor breathes in too much silica dust. When diagnosed at an advanced stage, silicosis is hard to treat but can be managed effectively.

There are recent studies that have estimated that silica dust has resulted in the death of over 500 construction workers each year. Also, COPD has resulted in the death of 4000 construction workers every year. Anyone who works in construction falls into the risk category because of the concrete dust they breathe in when working.

Construction Tasks that Create the most Dust

If you’re a construction worker, you’re likely to experience more levels of dust during the following occasions;

  • When using construction equipment that operate using high energy such as wall chasers, cut-off saws, grit blasters or grinders, which produce lots of concrete dust within the shortest time possible.
  • When clearing the dust using dry sweeping rather than wet brushing or vacuuming, you’re likely to inhale more dust.
  • Also, if you’re working in an enclosed construction space rather than an open air one, the concrete dust is trapped in the space forcing you to inhale it.
  • If you take longer when handling concrete cutting tasks, you will inhale more dust than the people who work for shorter times.

How to Control Exposure to Concrete Dust

dust from cutting concrete

1. Legal requirements

There are workplace regulations in place to prevent exposure to any dust during construction. Other than wearing protective clothing or equipment, there should be control measures in place to reduce the amount of dust. One of the most effective ways to do so is capturing the concrete dust at the source before it spreads into the air. Also, there are environmental regulations in place to prevent dust emissions or to control their contamination using the best possible means.

2. Wet control methods

Concrete cutting saws that are powered by compressed air or combustion engines might use wet systems to prevent further contamination of dust. However, it’s impractical to use these systems on electrical saws. Water is sprayed into the rotating disk used for cutting concrete to reduce emissions. Water can be supplied using a pressurised tank which is portable or from the water mains.

Portable pressurised tanks are supplied by many manufacturers of concrete cutting saws. It’s a simple bottle (made out of polypropylene) that contains at least eight litres of water. Using a narrow tube, the bottle is attached to two jets on each side of the guard. To control the water supply, there is a valve attached to the container. When the construction worker pressurises the tank using his hand, the water is released.

To guarantee dust suppression, the minimum rate of water flow should be about half a litre each minute. Therefore, rates lower than that will ultimately reduce overall performance. On the other hand, higher rates will not guarantee proper suppression of concrete dust rather the portable water tank will need to be refilled frequently.

To maintain the proper rate of water flow, the portable tank should be pressurised regularly. This is the most preferable method since it’s flexible to carry around the site as long as there is a water source for any refills required. On the other hand, when using the water system from the mains, the water flows through the hose to the water jets to allow for dust suppression when cutting concrete.

3. Personal protective measures

When using the wet systems or vacuuming to suppress the dust produced when cutting concrete, there are many things that can go wrong. Therefore, when this happens, it’s important to have some protective equipment such as masks to prevent further inhalation of dust. There are different types of masks for different tasks so it’s important to consult with your employer to get the best mask for the task in hand.

Note that, wearing masks or any other protective gear alone will not provide the protection you need. This is because:

  • There are many tasks that can produce too much dust which clogs the filter making it hard to breathe.
  • A mask only protects the wearer alone. Other individuals at the construction site are at risk of inhaling dangerous dust.
  • There is a chance that you might choose the wrong mask which means that you’re not completely protected.

Therefore, regardless of whether you are wearing a mask or not, it’s important to include all the other protective measures to ensure you have the best chance of staying safe when working in this kind of environment.