AggreBind treatment of contaminated materials

Oil Contaminated Sands Testing and Installation Procedures
Treatment and re-use of Oil Contaminated Sands (OCS) and Soil for road installations and brick manufacturing
Testing and Installation Procedures:
AggreBind soil stabilizer for contaminated soils

1.         OCS samples must be chemically analyzed including a sieve analysis.
2.         Proposed basic formula (by weight): 35%-50% OCS, 35%-50% fines, balance as aggregate/stone/crushed construction or mine waste with a  maximum stone size of 20mm, or 20% of the layer depth being treated.  Subject to testing.
2.1       Fines can include flyash, clay, lime, or mine waste.
3.         All samples for laboratory testing must be surface sealed with a mixture of 1 part AggreBind mixed with 3 parts water.

4.         All samples must be cured for 28 days prior to laboratory testing.
4.1       Test the samples using standard leaching testing procedures.
5.         Road installation procedures for OCS:
5.1       Rip the area to the required depth and grade the material to the ends or sides to expose the sub-base. Compact the sub-base and seal with a mixture of 1 part AggreBind mixed with 3 parts water.
5.2       Return the excavated material and add the OCS and fines (if required), mix thoroughly and grade the surface.
5.3       Spay the area with a mixture of 1 part AggreBind mixed with 5 parts water until Optimum Moisture Content (OMC) is reached and work this into the layer.
5.4       Grade and compact the layer and seal the surface with a mixture of 1 part AggreBind mixed with 3 parts water.
6.         It is important that the road is maintained and any damaged surface areas re-sealed.
7.         All standard road testing equipment can be used.
8.         A standard weight of 1800kg per cub metre for un-compacted material is used as a guideline for road construction.

AggreBind soil stabilization and dust control

5501.38 Reusing petroleum contaminated sands, gravel and soils as highway construction materials.

The director of transportation has determined that it is feasible to use in the construction of highways sands, gravel, and soils that contain varying amounts of petroleum products resulting from the upgrading of underground storage tanks. In order to maximize the beneficial reuse of these petroleum contaminated sands, gravel, and soils, the director shall establish a program to promote the reuse of these materials as highway construction materials.

Not later than one hundred eighty days after the effective date of this section, the director of transportation, in consultation with the chief of the bureau of underground storage tanks and the director of environmental protection, shall issue highway construction specifications that facilitate the reuse of petroleum contaminated sands, gravel, and soils that are removed during the repair, removal, or closure of underground storage tanks that are under the jurisdiction of the chief of the bureau of underground storage tanks. Following issuance of the specifications, the director of transportation shall prepare and distribute to any interested party information describing the program of the department to facilitate the reuse of such petroleum contaminated sands, gravel, and soils in the construction of highways.

In order to accumulate a sufficient and ready supply of petroleum contaminated sands, gravel, and soils that meet the specifications, the director of transportation is authorized to construct and operate temporary covered structures in locations that are in close proximity to highway projects and accumulate bulk quantities of these sands, gravel, and soils for reuse. These materials shall be made available to the department of transportation and its contractors for reuse on highway construction projects.

As used in this section, “petroleum” has the same meaning as in division (J) of section 3737.87 of the Revised Code, except that it does not include used oil.

Effective Date: 06-30-1997 

AggreBind encapsulation of contaminated materials

NEW, INNOVATIVE, COST EFFECTIVE, ENVIRONMENTALLY FRIENDLY SOLUTIONS, FOR THE TREATMENT AND RE-USE OF CONTAMINATED SOILS AND MINING WASTE MATERIALS

Oil contaminated fine dust, from mining operations in Peru, treated and sealed with AggreBind.

This effectively coats each fine particle with water based, traceable, environmentally safe, styrene acrylic cross linking polymer that seals and binds all soil particles together.

Proposed laboratory testing procedures for testing oil contaminated sands (OCS)

Sample dimensions:
cylinder 16cm high X 7.2cm diameter

Material:

  1. OCS Mixture of 1.3kg fine sand mixed with 0.04kg motor oil (based on a 30% average contamination rate), suggest the sample be pre-mixed and dried to simulate a real-world condition
  2. Clean sand

Samples:

  1. 100% OCS mixture of sand and motor oil
  2. 40% OCS mixture and 60% clean sand

Procedures:

1. Mix the sand and oil together thoroughly.
2. Calculate the moisture content of the mixtures, (Samples I. and II.)  (called A)
3. Determine the Optimum Moisture Content of the mixture. (called B)
4. Record the amount of liquid required to reach OMC ( answer B-A=C)
5. Calculate Aggrebind/water mix. (C = 25% AGB + 75% Water)
6. Mix the AggreBind and water together.
7. Add the mixture (6) to 1.3Kg of fine sand and mix thoroughly.
8. Compact the mixture in the cylinder.
9. Extrude the compacted sample and place on a surface to cure for 26 days.
10. Brush and seal all the surfaces with a mixture of 1 part AggreBind mixed with 3 parts water.
11.  Allow the surface to dry for 2 full days at a temperature of  +/-16°C.
12.  Proceed with the tests required to meet the declared objectives.

Questions for AggreBind treatment of contaminated materials

  • Is the contaminated material granular, liquid or solid What is the nature of the contamination
  • Where and how is the material currently stored. Is it in stockpiles or in containers
  • What is the intended use of the contaminated material after it has been treated.
  • Do we have a full laboratory analysis for the contaminated material
  • What is the projected active life of the contaminated material.
  • What are the projected costs of current treatments and storage for the contaminated materials.
  • Do we have any projections of the quantities of contaminated materials, current and future, that will require treatment.
  • What regulations and standards are there in respect of the treatment of contaminated materials.
  • What tests are required once the contaminated material has been treated.
  • If required can the contaminated material be dried prior to treatment.
  • Would treatment have to carried out in a sealed environment.

Samples are sprayed with a solution of 1 part AggreBind to +-3 to 7 parts water subject to material and requirements.
The mixture is applied at a rate that ensured that that the moisture content is at least 10% above Optimum Moisture Content.
The mixture is working thoroughly into the contaminated material to ensure that all the particles are fully coated.
The treated samples were then spread onto a clear non-absorbent plate and allowed to cure and harden at room temperature.
The treated cured samples were then immersed in water for 7-14-and 28 days.

There was no leaching, separation or softening of the treated samples.

AggreBind soil stabilization and dust control

Effect of Crude Oil Impacted Sand on compressive strength of concrete

Abstract–Effects of Crude Oil Impacted Sand (COIS) on the compressive strength of concrete was examined. Con- crete mix, 1:1.8:2.7 was designed for all specimens with w/c of 0.5. Crude oil (2.5%, 5%, 10%, 15%, 20% and 25%) by weight of sand was used to contaminate sand for the preparation of COIS concrete. 147, 100 mm concrete cubes (21 control and 126 contaminated samples) were produced. The cubes were cured and the compressive strengths determined at ages 3, 7, 14, 28, 56, 84, and 168 days. COIS concrete samples showed slow rate of strength gain, and strength reduction compared with the control samples. A 18–90% compressive strength was lost due to 2.5–25% crude oil contamination, respectively.

Read Effect of Crude Oil Impacted Sand on compressive strength of concrete – the full document below:

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AggreBind soil stabilization and dust control

Characterization of Oil Contaminated Soil-Kuwait:

Abstract—During the Gulf War (1991) more than 600 oil wells were set on fire. The gushed oil from Kuwait wells created what is known as oil lakes by filling natural depressions in the topography and artillery trenches which even contain live ammunition. Since the liberation of Kuwait, individual efforts tried to decontaminate the soil with only partial successes. Recently, a joint project between the United Nation Compensation Commission (UNCC), Kuwait National Focal Point (KNFP), and Kuwait University (KU) has been initiated to conduct a comprehensive work to eliminate the contaminated soil and its environmental impacts. The objective of this study is to characterize oil contaminated soil by the assessment of its physical, chemical, and geotechnical properties. The results estimate the contaminated volume to be between 16.5×106 m3 and 22.7 ×106 m3, and show that its physical properties were heavily deteriorated and chemical characteristics were highly affected as well as the geotechnical properties due to the presence of oil.

Read the full article below:

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