Concrete manufacturing, application and waste create 8% of the world's CO2 emissions. Methane, a greenhouse gas, is released as waste in landfills decomposes. The disposal of concrete waste contributes to the generation of landfill waste and the depletion of natural sand and gravel resources. However, proper recycling and disposal of concrete waste can mitigate its environmental impact and provide many business benefits.
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Recycling concrete is an important cost saving strategy when your business generates concrete waste. Demolished concrete can be treated to ensure the material carries no contaminants, and unused concrete can be crushed and repurposed at the job site. This reduces the demand for new concrete production, adds efficiency in material preparation and provides a cheaper alternative to newly mined concrete.
Construction companies need to decide whether they will manage their own waste or pay to have it removed at the end of each job. If you do not have enough trucks to move concrete waste, disposing it yourself will be much more difficult. However, most areas have dumpster rental and junk hauling companies that provide a good first option for concrete disposal.
Before you pay for any disposal services, research the options in your area and learn where each company takes concrete waste. Many companies will take concrete to a landfill, but use a recycling facility or transfer station. Consider whether a disposal company is affordable and offers a proper path to recycling.
Concrete disposal methods include:
Whether you choose to dispose of concrete yourself or call on another company, plan ahead to make waste management safe and cost-effective. Work with your chosen waste disposal company to schedule when they will deliver and remove the dumpsters. Additionally, let the company know where your job site is and how to access any waste and debris.
Follow these steps for a safe disposal process:
Many types of unused concrete elements can be reused instead of thrown away or recycled. If you have significant amounts of concrete left over at the end of your job, keep it for the next one. If you do not foresee a use for a particular type of leftover concrete, consider donating it to a landscaping company and local donation facility.
Types of reusable concrete waste include:
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The main challenges of the concrete removal process are timing and planning. Organize all the waste and debris as you generate it, then fill the dumpster when it arrives.
There are numerous benefits to recycling concrete waste for both the environment and construction companies. This process can reduce the amount of material sent to landfills, which leads to lower landfill costs and less strain on natural resources.
One of the most significant benefits of recycling concrete waste is the conservation of natural resources. By reusing the concrete material, less raw material is required for new construction projects. This helps to preserve natural resources and reduce the energy used to produce new concrete.
The recycling process for concrete waste involves breaking down the material into smaller pieces using industrial equipment such as jaw crushers, impact crushers and cone crushers. These machines break down large pieces of concrete into more manageable sizes. Recyclers then feed the broken concrete into a screening machine, which separates the material into different sizes. Any large pieces remaining are crushed again, and the smaller pieces are cleaned and sorted for reuse.
Crushed concrete goes through numerous treatment processes depending on the types of contaminants found within it. These include:
Then, the crushed material is reduced to an even smaller size for a variety of new applications. These include road building and aggregate bases for new concrete mixes. Some construction companies may consider investing in concrete crushing and cleaning equipment to reduce raw material spend.
The cost of concrete disposal typically depends on the amount of debris that needs to be removed. Additionally, some methods are more expensive than others. When planning waste transportation for your next job, make sure to ask dumpster renters and junk haulers for quotes so that you can choose the most cost-effective option. Junk hauling services may seem like the best option in most cases, but that can change when you analyze their pricing against other choices.
For example, junk hauling companies often charge per bedload for heavy construction materials such as concrete or asphalt. They typically only allow stacking to a certain height, such as 1-1.5 feet high. The average junk hauling truck has an 80-square-foot bed. This would allow a construction company to remove between 80-120 square feet of concrete at a time. On average, this could equal 2 tons of waste removed for $600.
However, rental dumpsters can usually haul up to 6-10 tons of concrete at an average cost of $350-450. Dumpsters are a more cost-effective option for large amounts of concrete waste, such as sidewalk or driveway removal. A 640-foot sidewalk can weigh up to 8 tons, which would necessitate 4 trips in total for a junk hauling service instead of scheduling a dumpster to be delivered to the jobsite.
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