Polymer concrete

Source: Wikipedia, the free encyclopedia.

Polymer concrete, also known as

Epoxy Granite, is a type of concrete that uses a polymer to replace lime-type cements as a binder. In some cases the polymer is used in addition to Portland cement to form Polymer Cement Concrete (PCC) or Polymer Modified Concrete (PMC).[1] Polymers in concrete have been overseen by Committee 548 of the American Concrete Institute
since 1971.

Composition

In polymer concrete,

chemicals
. Polymer concrete is also composed of aggregates that include silica, quartz, granite, limestone, and other high quality material. The aggregate should be of good quality, free of dust and other debris, and dry. Failure to fulfill these criteria can reduce the bond strength between the polymer binder and the aggregate.[3]

Polymer concretes commonly known as Epoxy granite are distinct in composition only in that the polymer used is exclusively Epoxy

Uses

Polymer concrete may be used for new construction or repairing of old concrete. The

asphalt pavement, for higher durability and higher strength upon a concrete substrate, and in skate parks, as it is a very smooth surface.[citation needed
]

Polymer concrete has historically not been widely adopted due to the high costs and difficulty associated with traditional manufacturing techniques. However, recent progress has led to significant reductions in cost, meaning that the use of polymer concrete is gradually becoming more widespread.[4][5]

Polymer concrete in the form of

Cast Iron due to its superior mechanical properties and a high chemical resistance.[citation needed
]

Properties

The exact properties depend on the mixture, polymer, aggregate used etc.[6] Generally speaking with mixtures used:

  • The binder is more expensive than cement
  • Significantly greater tensile strength than unreinforced Portland concrete (since polymer plastic is 'stickier' than cement and has reasonable tensile strength)[1]
  • Similar or greater compressive strength to Portland concrete[1]
  • Faster curing
  • Good adhesion to most surfaces, including to reinforcements
  • Good long-term durability with respect to freeze and thaw cycles[1]
  • Low permeability to water and aggressive solutions
  • Improved chemical resistance
  • Good resistance against corrosion
  • Lighter weight (slightly less dense than traditional concrete, depending on the resin content of the mix)
  • May be vibrated to fill voids in forms
  • Allows use of regular form-release agents (in some applications)
  • Product hard to manipulate with conventional tools such as drills and presses due to its density. Recommend getting pre-modified product from the manufacturer
  • Small boxes are more costly when compared to its precast counterpart however pre cast concretes induction of stacking or steel covers quickly bridge the gap.

Specifications

Following are some specification examples of the features of polymer concrete:

Material Density
kg/m3		 Compressive strength
Urea formaldehyde polymer concrete 2260[7] 37 MPa (5,400 psi)[8]
Polyester concrete N/A 95 MPa (13,800 psi)[9]
Epoxy concrete N/A 58 MPa (8,400 psi)[10]

References

  1. ^ a b c d Composite Structures for Civil and Architectural Engineering By D-H Kim
  2. ISBN 9781466590328
    .
  3. ^ L J Daniels, PhD Thesis, University of Lancaster, 1992 Polymer Modified Concrete
  4. ^ a b "Polymer Concrete Manholes & Precast Concrete | Armorock". Genevapolymerproducts.com. 2020-03-23. Retrieved 2022-04-15.
  5. ^ "Home". napsco.co.
  6. OCLC 49708378.{{cite book}}: CS1 maint: others (link
    )
  7. S2CID 135832609
    .
  8. S2CID 137295866
    .
  9. ISBN 9780419223306
    .
  10. ^ "Power-Patch Concrete Epoxy Kit (Grey)". Interstate Products Inc. Retrieved 2021-06-04.

Further reading

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