| 词条 | Polymer concrete | |||||||||
| 释义 |
Polymer concretes are a type of concrete that use polymers 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. CompositionIn polymer concrete, thermoplastic polymers are used,[2] but more typically thermosetting resins are used as the principal polymer component due to their high thermal stability and resistance to a wide variety of chemicals. Polymer concrete is also composed of aggregates that include silica, quartz, granite, limestone, and other high quality material. The aggregate must 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. UsesPolymer concrete may be used for new construction or repairing of old concrete. The adhesive properties of polymer concrete allow repair of both polymer and conventional cement-based concretes. The low permeability and corrosive resistance of polymer concrete allows it to be used in swimming pools, sewer structure applications, drainage channels, electrolytic cells for base metal recovery, and other structures that contain liquids or corrosive chemicals. It is especially suited to the construction and rehabilitation of manholes due to their ability to withstand toxic and corrosive sewer gases and bacteria commonly found in sewer systems. Unlike traditional concrete structures, polymer concrete requires no coating or welding of PVC-protected seams.[3] It can also be used as a bonded wearing course for asphalt pavement, for higher durability and higher strength upon a concrete substrate. 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.[3][4] PropertiesThe exact properties depend on the mixture, polymer, aggregate used etc. etc. but generally speaking with mixtures used:
SpecificationsFollowing are some specification examples of the features of polymer concrete:
References1. ^1 2 3 [https://books.google.co.uk/books?id=Ebd-hSpIjUgC&lpg=PA39&ots=VcQQLrEZOr&dq=polymer%20injected%20concrete%20portland&pg=PA37#v=onepage&q=polymer%20injected%20concrete%20portland&f=false Composite Structures for Civil and Architectural Engineering By D-H Kim] 2. ^https://books.google.co.uk/books?id=NiQtAgAAQBAJ&lpg=PA246&ots=BKEhW6eOO9&dq=thermoplastic%20polymer%20concrete%20composition&pg=PA2#v=onepage&q=thermoplastic&f=false 3. ^1 http://genevapolymerproducts.com 4. ^http://napsco.co 5. ^Design and manufacture of hybrid polymer concrete bed for high-speed CNC milling machine Jung Do Suh Æ Dai Gil Lee 6. ^The compressive strength of a new ureaformaldehyde-based polymer concrete A. A. Alzaydi, S. A. Shihata1 and T. Alp (in table Properties of polymer concrete) 7. ^https://books.google.co.uk/books?id=hCivTb4dp3kC&lpg=PA49&dq=polymer%20concrete&pg=PA54#v=onepage&q=polymer%20concrete&f=false Further reading
1 : Concrete |
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