High Density Concrete Blocks

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Marshield’s high density concrete is a cost-effective solution to lead brick shielding often used in construction linear accelerator vaults or rooms

High Density Concrete is a very cost-effective solution to lead brick shielding that would normally be used in new or upgraded construction linear accelerator vaults or rooms. The significant attenuation provided by high density blocks significantly reduces the amount of shielding necessary to obtain the desired protection levels. When comparing normal concrete to MarShield’s high density blocks, less space is required for high density concrete blocks that is usually required for concrete vaults. Hospitals have been looking for ways to avoid negative health issues or environmental challenges associated with lead. They are now discovering that high density concrete blocks are the best choice for environmentally safe radiation protection.

MarShield can provide high density concrete blocks up to 300 pounds per cubic foot. High density concrete gives a composite shield for both neutron and gamma radiation. High density aggregates are the key ingredient in high density concrete. The most common aggregates used to achieve the required densities are Hematite (Fe2O3), Ilmenite (FeO TiO2), Magnetite (Fe3O4) and Steel Aggregate.


Sizes

MarShield offers two sizes of interlocking high density blocks that interlock on all four sides preventing radiation from streaming through. Compared to a conventional concrete treatment room, the increased density can eliminate up to half your shielding thickness and save valuable space. These multiple size options provide a simple solution to adding space-saving shielding to any wall, ceiling and floor without having to endure lengthy construction delays. You can choose to work with your own local mason or concrete contractor to save money on installation.

Applications

Typical applications or rooms that use of these high density blocks would be Linear Accelerator vaults or rooms, Cancer Therapy rooms or mazes, Proton therapy rooms, oncology rooms, industrial X-Ray or NDT testing and nuclear power plants.

Features and Benefits

The advantages or benefits to these modular HD blocks are:

  • Easy and quick to, install, remove, and re-install if necessary.
  • MarShield offers smaller sizes for lighter weight and easier handling.
  • Construction is not labor intensive, design is flexible, and does not omit hazardous dust emissions during installation.
  • Blocks are environmentally safe to handle and use with no disposal concerns as material is non toxic.
  • Blocks are dry stacked
  • Accelerated depreciation
  • No concrete curing time
  • Little to no steel reinforcement and no formwork
  • Space saving offer regular concrete
  • Easy to transport and store on worksite, unaffected by weather.

Product Details

Marshield’s interlocking high density concrete (HDC) block is an excellent choice where space is limited. HDC is effective in attenuating both neutron and gamma radiation. HDC provides up to double the density of standard concrete. When different densities are required on a single project, MarShield uses a unique coloring system that easily distinguishes the different densities of block, thereby minimizing confusion on the jobsite. The 147 lbs. pounds per cubic foot HDC block is grey, the 240 lbs. pounds per cubic foot HDC block is black, the 250 lbs. pounds per cubic foot HDC block is green and the 300 lbs. pounds per cubic foot HDC block is red. We also provide the aggregate and mix design for high density grout as well as additional custom size blocks and densities if required.

6” Thick Interlocking High Density Concrete Blocks

6' high density concrete blocks
Size: 4” high x 8” long x 6” thick

Stock Densities:

240 lbs. per cubic foot / 3.84 grams per cubic cm
250 lbs. per cubic foot / 4.00 grams per cubic cm
300 lbs. per cubic foot / 4.81 grams per cubic cm

4” Thick Interlocking High Density Concrete Blocks

4' high density concrete blocks
Size: 6” high x 12” long x 4” thick

Stock Densities:

240 lbs. per cubic foot / 3.84 grams per cubic cm
250 lbs. per cubic foot / 4.00 grams per cubic cm
300 lbs. per cubic foot / 4.81 grams per cubic cm

Custom High Density Concrete Blocks

Optional:
Solid Rectangular HD Blocks & Matching Density HD Grout
2-Core HD Masonry Units & Matching Density HD Grout



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High Density Concrete Information Sheet

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