AggreBind can be used for the benefit of the environment to treat and stabilize waste material including waste plastic and fly-ash, as well as oil contaminated sands. These materials are rendered inert when treated with AggreBind and can be re-purposed into viable and durable construction related products.
Environmental and cost considerations for using AggreBind in soil stabilized roads, blocks, bricks and pavers.
Cement is widely used in soil stabilizing and is sometimes added to various liquid based polymers, as an additive, to create polymer /cement stabilized soil base layers, with about 3% cement added per 50kg per cu m. of soil treated. Cement is the highest energy user in the world consuming around 40% of the world’s total energy consumption.
AggreBind uses NO cement, just water based environmentally friendly polymers to create durable, affordable roads, blocks, bricks and pavers. AggreBind’s embedded energy content is insignificant when compared to installations where cement is used.
Some cement assisted polymer products claim to immobilise toxic substances in the soil/roadways yet they are still using cement, which is known to leach out and is banned from use on many sites in the United Kingdom and around the world.
AggreBind polymer bonds and seals the soil colloids together, locking them in and immobilizing all toxic contaminated substances within the soil.
Cement assisted polymer products (CAPP) claim that their treated road can be opened for traffic immediately, but cement requires a chemical cure reaction time to attain its’ full strength.
AggreBind cures by evaporation, and the compaction of the soil, which typically achieves 99.7 to 99.9% maximum density and is capable of sustaining 20 Ton trucks within a couple of hours and 100 Ton truck in about 6 to 8 hours. Essentially, as soon as an AggreBind road is compacted and sealed the base becomes operational as a road. All wear surface treatments will bond to an AggreBind stabilized base layer or you can surface-seal with AggreBind.
CAPP have requires additional equipment and logistical support vehicles, for the delivery and dispersal of the cement onto the soil.
AggreBind eliminates the need for these extra vehicles and operations. Therefore, the process of the construction process is more sequential as it is a series of continuous operations.
CAPP use a particular manufacturer of surface milling machines.
AggreBind can use any type of manufacturers’ equipment and farm equipment from anywhere in the world.
CAPP claim a reduction in CO2 emissions which, over more traditional road construction methods, would be correct.
AggreBind claims substantial reductions in CO2 emissions both from the embedded energy necessary to construct the road, plus the additional savings by eliminating the cement distributing construction equipment, handling and delivery of same , plus fuel savings, plus vehicle maintenance and plus the capital investment costs of equipment purchases, etc.
AggreBind construction equipment is at least 25% less than the CAPP requirement.
CAPP claim a construction output of 8000 sq m per day based on a 17Km x 30m wide road and an assumed depth of 30cm. Needed are 1780 truck loads for delivery of cement and polymer.
AggreBind based on 30cm depth and an average soil grading mix will need 50 20 ton truckloads or 25 40 ton truckloads carrying the AggreBind polymer necessary for the same project, including a finished surface-seal.
AggreBind saves over 1730 truckloads of material delivery plus the transportation, handling, fuel, and related labor costs. Whilst the daily output of CAPP would readily achieve 8000 sq m per day, with AggreBind you will completely eliminate the cement operation. An output increase to 10,000 m2 per day is realistic. (Note, cement is very difficult to apply in windy weather as it goes everywhere !)
CAPP project fuel and CO2 savings, which are technically correct while ignoring the embedded energy content for a m2 or m3 of soil, which is a key element in evaluating the overall benefits of a particular process solution.
AggreBind provides all the benefits and fuel savings that CAPP have identified – plus the additional savings made by using less equipment and delivery trucks, plus an overall substantially lower embedded energy content. With no wind conditions to consider AggreBind would have more available productive days and potentially the project duration could be shorter by about 10%. Whilst the CAPP cement dust can be overcome by using a slurry mixer, this is an additional step and piece of equipment that is not necessary using AggreBind’s products and system.
CAPP use the laboratory for soil analysis and getting the cement /polymer mixture ratios correct to achieve a given strength specification.
AggreBind do the same but only have to work with one product, not two.
CAPP remove samples and has them analyzed in a laboratory to ensure that the specifications related to dosage rates are complied with.
AggreBind has eliminated the need for cement soil stabilization. AggreBind has taken soil stabilization to a higher level by the addition of the AggreBind polymer to provide a water resistant stabilized soil.
AggreBind has taken soil stabilization to the next level, using no cement and providing a water resistant bound layer of soil which is then sealed at the surface. Water penetration is a major cause of road failure throughout the world is now virtually eliminated.
AggreBind can produce a stabilized soil road without the need for additional wear surfaces, ideal for the more rural applications. These roads can, if required at a later date, have an asphalt wear surface added.
AggreBind stabilized soil and AggreBind surface seal has been used in various installations throughout the world, including
- Mine haul roads for 200 ton trucks,
- British Military landing strips for Hercules and C31s,
- Plantation haul roads,
- And, even a mixture of palm nut shells and soil in the Ivory coast to provide wear characteristics
ALL without any cement.
Note: The preceding comparison is to soil stabilizing polymers that require the addition of cement. When AggreBind is compared to a fully cementitious project the advantages of AggreBind with its minimal carbon footprint are tremendous.
Trial of treated and stabilized waste material with AggreBind
Objectives of the trial:
Re-purposing shredded waste materials
into viable and durable construction related products.
- 60% shredded waste materials
- 40% ( 10% fine non-cohesive sand mixed with 30% fly-ash)
- Stabilizing mixture was 1 part AggreBind mixed with 3 parts water.
Initial target markets:
- To manufacture a non-load bearing infill block, with good insulation properties, for use in conjunction with structural framed buildings.
- To manufacture paving blocks for use on pedestrian pathways.
- To manufacture insulation materials from just the shredded waste.
- To incorporate waste materials into road base layers.
AggreBind soil stabilizer is a complex, water based, cross- linking copolymer that is environmentally friendly. AggreBind coats the surfaces of a wide range of contaminated materials, rendering them harmless and inert, and binds them together.
Typical mixture of waste materials with all metal and usable plastic removed.
This is then shredded to produce a maximum particle size of 25mm.
The AggreBind soil stabilizer coats and seals all the materials during the installation process, rendering them inert, and then binds them together into a structural load bearing layer.
Base layers for roads would require a wearing surface.
Environmentally Sensitive AggreBind Applications
Protocol for installing AggreBind roads, pathways and parking areas in environmentally sensitive locations.
Remove all organic matter and roots from the area to be stabilized.
If possible obtain a sieve analysis of the sub-soil/material to be stabilized.
Ideal grading is 35% fines passing through a 200sieve and no stone larger than 20% of the layer depth being stabilized.
Rip the area to the required depth.
Check that the area below the layer to be stabilized is structurally sound. If necessary grade the ripped layer to one side and compact the exposed base. Replace the layer to be stabilized.
Check the Optimum Moisture content (OMC) of the soil to be stabilized.
Use a standard dosage rate of 4ltrs AggreBind per cub.mtr of soil treated mixed with sufficient water to bring the soil to the OMC level.
Spray the area with the AggreBind/water mixture, mix in thoroughly, grade for drainage and compact.
Seal the surface with a mixture of 1 part AggreBind mixed with 4 parts water at a rate of 1 ltr per sq mtr of surface area.
AggreBind is available in white( dries clear) or a wide range of other colors,
AggreBind can also be used as a surface seal for drainage channels.
AggreBind is totally environmentally friendly and can be used to encapsulate contaminated materials.
In areas with high water tables it is advisable to raise the level of the road/pathway.