Soil Recycling and Soil Cement Mixing

Soil Recycling and Soil Cement Mixing

The Problem

In many countries, sand and aggregates for making concrete are becoming scarce. The cost to dispose of excavated spoil is prohibitive. Transport costs and the environmental impact of transport is high. Traffic congestion in inner cities causes logistical problems.

When you evaluate the cost of constructing utility pipe and services under the roads of inner cities and busy towns, the cost can be prohibitive.

How can you excavate trenches and use the excavated material to produce a weak mix concrete bed and surround to service pipes? If this were possible, it would save the cost of disposing spoil, save the cost of purchasing raw materials to make the concrete, and save transport costs.

Soil Recycling

The Solution

We have a concrete batching machine where the excavated spoil is loaded into the machine.

The machine separates the good material from the poor material, adds cement and water to produce a weak-mix concrete.

The whole process is carried out on site in the road or street.

The cost saving is approximately 25%. We have carried out a cost analysis for a typical 600mm concrete pipe laid in a 2m deep trench as an example.

The cost analysis below compares a standard 600mm concrete drainage pipe construction compared to using recycled cement soil mix for the bed and surround.

Watch The Video To See How The Machine Works

Soil Recycling Cost Analysis

Soil Recycling
Soil Recycling

The sketch and analysis above is a 600mm diameter concrete drainage pipe laid in a 2m deep trench with a 1 x 1m concrete bed and surround.

The exercise is to see how much saving can be made if the concrete bed and surround was made from cement soil rather than a C8 concrete mix.

The cost analysis and cost comparison calculations are in the table below. It has been costed out in pounds and are typical UK prices for civil engineering works. It is assumed the work is being carried out in an inner-city street.

The recycled soil option uses 70% the spoil to make the coil cement bed and surround. The mix is 150kg of cement with treated and screened spoil.


Soil Recycling Savings

There are two core savings.

1. Spoil removal off site
2. The cost of the bed and surrounding concrete


Soil Removal

The cost in option one is £13,000 to remove 100 m3 of spoil off site. In option two the quantity of spoil is only 28 m3 and the cost is only £3,640


Bed and Surround Cost

The first option used a C8 weak mix concrete priced at £75 m3 and option two uses the soil-cement mix costing only £55 m3 to produce.


Temporary Storage of Spoil

The cost of moving the spoil for use on site had gone up slightly as there is more material to store on site.


Soil Recycling Conclusion

The difference in cost for the two options is £10,584. This represents a 25% cost saving using this method of construction.


Soil Recycling Environmental Benefits

Not only does the method save money is also saves carbon emissions from less transport required to buy in raw materials and to remove the spoil from site.

The method also saves natural resources by recycling the existing excavated materials than using natural stone.


What should you do now?

Watch the video of the recycling machine in action. The video is above, then complete the form to get a price.

Soil Recycling Batching Plant

This mobile concrete recycling plant is developed to reuse up to 70% of the excavated material from trenches. The integrated separator crushes and screens the excavated material. All stones and fragments larger than 40 mm are separated from the other material. The crushed and screened material is then transferred to the pan mixer where it is mixed with cement and water before the finished mix is pumped back into the trench. The end product is a self-compacting material which can easily be re-excavated.


Concrete Recycling Plant Solution

The recycling plant is a highly flexible solution. It is ideal for working in an urban environment and in places with limited space. It is also fast and easy to erect and make ready for production. All you have to do is connect electricity and water, and fill cement in the cement silo.


Concrete Recycling Plant Investment

The recycling plant is a profitable investment which will soon pay for itself and return a profit. It keeps the costs for transportation and new materials at a minimum, and the trench width and thus the volume of the excavated material can also be reduced. All wearing parts are produced in robust materials and can be replaced separately, which minimises operating costs. There is free access to all of the plant functions, facilitating daily cleaning, maintenance and service.


Concrete Recycling Plant Legislation

The recycling plant is designed to comply with French legislation.

Compact mobile batching plant developed to reuse up to 70% of the excavated material from trenches.


Key Benefits of the Fibo Concrete Recycling Plant 

  • The plant crushes, screens and mixes the excavated material and then pumps it back into the trench. The end product is a self-compacting material, which can easily be re-excavated.
  • The costs for transport and new materials are kept at a minimum, and the trench width and thus the volume of the excavated material can also be reduced.
  • The recycling plant is designed to comply with French legislation.
  • Learn more about concrete recycling production.
Soil Recycling

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About Fibo Batching Plant

Fibo intercons concrete batching plant is the best avalible on the market, it is a well thougt out solution, designed to provide optimum flexibility, performance and operating efficiency.

It does not require a cast foundation, it can be placed on any even surface.

Our concrete batching plants are designed and built to a very high standard, so it will last more than fifteen years – this insures a very high return on your investment.

Fibo Intercon supply a large range of high quality concrete batching plant with a dosing accuracy of +-3% for standard machines and +-1% for our pre-weighing machines..

Below you can see a small selection of our standard machines, there can be set up and ready to go within two hours.

Ask a Question or Book a Call

Go to our contact page and ask us a question. We normally respond very quickly.

Click the button below to book a call with Bob Evans our technical sales director. You can see Bob’s availability and book a call to suit your diary.


Capacity: 4-5M3/hour
Mini Viking is the ideal solution for small and medium-sized construction projects.


Capacity: 10-16M3/hour
B1200 is a compact, mobile batching plant assembled on a joint twin-axle bogie trailer.

Remote Site Concrete Production


Capacity: 25-45M3/hour
M2200 is a mobile batching plant assembled on a joint triple-axle bogie trailer with turn able front axle.

Remote Site Concrete Production


Capacity: 25-60M3/hour
T2200 is a mobile batching plant assembled on a common twin-axle step frame semi trailer.

Horizontal & Vertical Silos

Capacity: 15-66M3
Fibo intercon supplies big bag silos as well as vertical and horizontal cement silos.

Let’s find your solution

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