Polymer Concrete

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PAPER PRESENTATION ON

By
T.V.M. Akhilash Guptha Email: akil_chari@yahoo.co.in

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B. Nareen Kumar

nareen_rathode2007@yahoo.com

2 ABSTRACT: In Concrete Technolgy there are many types of Concretes here we are mainly discussing about Polymer Concrerte. Polymer concrete is a composite material. A graded mixture coarse and fine aggregates bound together by an appropriate organic resin system. Polymer concrete is a relatively low-cost composite material system that has been developed to be a technically viable alternative to porcelain for most high voltage electrical insulation applications. Polymer composites appear as useful materials for repair and protection of building structures, as well as for manufacturing pre-cast elements. In the case of pre-cast elements as well as repair materials, the usefulness and durability of polymer composites depend on the selection of the material composition for obtaining the composite with

controllable properties Polymer Concrete consists of a polymer binder which may be a thermoplastic but more frequently is a thermosetting polymer, and a mineral filler such as aggregate, gravel and crushed stone. PC has higher strength, greater resistance to chemicals and corrosive agents lower water absorption and higher freeze-thaw stability than conventional Portland cement concrete.

Polymer modified concrete may be divided into two classes; polymer impregnated concrete and polymer cement concrete. The first is produced by impregnation of pre-cast

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hardened Portland cement concrete with n monomer that is subsequently converted to solid polymer. To produce the second, part of the cement binder of the concrete mix is replaced by polymer Both have higher strength, lower water permeability, better resistance to chemical, and greater freeze-thaw stability than conventional concrete.

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3 INTRODUCTION Polymer concrete is a composite material in which the binder consists entirely of a synthetic organic polymer. It is variously known as synthetic resin concrete, plastic resin concrete. Because the use of a polymer instead of Portland cement represents a substantial increase in cost, polymers should be used only in applications in which the higher cost can be justified by superior properties, low labor cost or low energy requirements during processing and handling. It is therefore important that architects and engineers have some knowledge of the capabilities and limitations of PC materials in order to select the most appropriate and economic product for a specific application. The first polymer concrete construction in the worldis Concrerte-Roman_colosseum_red.

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Concrerte-Roman_colosseum_red.

NATURE AND GENERAL PROPERTIES:

4 Polymer concrete consists of a mineral filler and a polymer binder (which may be a thermoplastic, but more frequently, it is a thermosetting polymer. When it is used as a filler, the composite is referred to as a polymer mortar. Other fillers include crushed stone, gravel, limestone, chalk, condensed silica fume, granite, quartz, clay, expanded glass, and metallic fillers.

To produce PC, a monomer, a hardener and a catalyst are mixed with the filler. Other ingredients added to the mix include plasticizers and fire retardants. To achieve the full potential of polymer concrete products for certain applications, various fiber reinforcements are used. These include  glass fiber,  glass fiber-based mats,  fabrics and  metal fibers.

The amount polymer binder used is generally small and is usually determined by the size of the filler. Normal the polymer content will range from 5 to 15 percent of the total weight, but if the filler is fine, up t 30 percent may be required.

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Polymer concrete composites have generally good resistance...
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