Polymer concrete and it's types

what is polymer concrete, types, properties, material used in manufacturing process , manufacturing process, applications and their advantages. case study on polymer composite concrete.

1. PRESENTED BY MONISHA K Y (4NM18CCT11) NEHA J R (4NM18CCT12) Construction Technology SUBMITTED TO, Mr. SUNDIP SHENOY Asst. Professor Dept. of Civil Engineering, NMAMIT 2018-19 POLYMER CONCRETE COMPOSITES SEMINAR ON

2. CONTENT INTRODUCTION ON POLYMER CONCRETE TYPES OF POLYMER CONCRETE PROPERTIES OF POLYMER CONCRETE PREPARATION APPLICATIONS CASE STUDY DISADVANTAGES CONCLUSION REFERENCE MTECH IN CONSTRUCTION TECHNOLOGY

3. 1. INTRODUCTION WHAT IS POLYMER CONCRETE? A higher strength, water tightness, and improved durability and resistance to freeze-thaw cycles over normal PCC can be achieved by polymer concrete. Polymer concrete is a composite material which results from polymerization of a monomer and aggregate mixture. MTECH IN CONSTRUCTION TECHNOLOGY

4. 2. THE COMPOSITES USING POLYMER CAN BE 1. Polymer concrete (PC) , when the binder is a polymer that replaces the cement paste 2. Polymer modified concrete (PMC) , when the polymer is mixed along with cement 3. Polymer impregnated concrete (PIC) , when the cement concrete is treated by soaking and polymerization. 4. Partially Impregnated And Surface coated polymer concrete. MTECH IN CONSTRUCTION TECHNOLOGY

5. 2.1 POLYMER CONCRETE The polymerized monomer acts as binder for the aggregates and the resulting composite is called “Polymer Concrete.” METHODS USED FOR MANUFACTURING POLYMER CONCRETE The first is the conventional method of adding monomer to dry aggregate and stirring until a uniform blend is achieved. The second technique consists of placing the monomer in the specimen mould and then gradually adding aggregate to the monomer. MTECH IN CONSTRUCTION TECHNOLOGY

6. MERITS Rapid curing at ambient temperatures. Good long-term durability with respect to freeze and thaw cycles. Low permeability to water and aggressive solutions. Good resistance against corrosion. DEMERITS It tends to be brittle in nature i.e. if fiber. reinforcement is not provided in some polymer. concrete cases they tend to develop cracks. Among the disadvantages is their high cost. MTECH IN CONSTRUCTION TECHNOLOGY

7. 2.2. Polymer modified concrete (PMC) It is also known as polymer cement concrete. Polymer modified concrete is gaining popularity because of its ease of handling, economy and satisfactory results. Low water absorption and permeability make it an effective material for use in hydraulic structures as well. It has the property of setting quickly . MTECH IN CONSTRUCTION TECHNOLOGY

8. MERITS The most impressive characteristics of PMC are its ability to bond strongly with old concrete, and to resist the entry of water and aggressive solutions. Epoxy resin produced a concrete that showed some superior characteristics over ordinary Portland cement. DEMERITS Modest improvement of strength and durability MTECH IN CONSTRUCTION TECHNOLOGY

9. 2.3. Polymer-Impregnated Concrete (PIC) Polymer-Impregnated Concrete (PIC) is generally, a precast and hydrated portland cement concrete, which has been cleaned, dried (eventually evacuated) and impregnated with a low viscosity monomer (eventually soaked under pressure) before being polymerized. The unique feature of impregnating concrete is that a large part of the voids volume in the capillary pores is filled with the polymer and forms a continuous internal reinforcing structure which is thus responsible for the remarkable improvement in strength and durability. MTECH IN CONSTRUCTION TECHNOLOGY

10. 2.4. Partially Impregnated And Surface coated polymer concrete The PIC can be easily produced by initially soaking the dried specimens in the liquid monomer ,then sealing them by keeping them under hot water at 70°c to prevent or minimize loss due to evaporation. Partial impregnation may be sufficient in situations where the major requirement is surface resistance against chemical and mechanical attack in addition to increase in its strength. The depth of monomer penetration depends upon Pore structure Duration of soaking Viscosity of the monomer MTECH IN CONSTRUCTION TECHNOLOGY

11. MERITS It reduces freeze thaw deterioration, corrosion Increase in tensile strength Increase in compressive strength Increase in modulus of elasticity Resistance to acid attack It improves the durability of concrete Less pores MTECH IN CONSTRUCTION TECHNOLOGY

12. 3. PROPERTIES The mechanical and chemical resistant properties Porosity of the conventional cement mortar is greatly reduced increasing its durability. Seals the voids formed during the cement hydration. Compressive strength increases and is different for different composition and on type of polymers used. Tensile strength increases and is different for different composition and on type of polymers used. MTECH IN CONSTRUCTION TECHNOLOGY

13. 4. PREPARATION To minimize the volume of voids in aggregate is achieved by properly grading the aggregates so as to attain maximum density and less voids. T=these aggregates are prepacked and vibrated well in a mould and monomer is diffused through the aggregates and polymerization is initiated. A silane coupling agent is added to the monomer to improve the bond strength between the aggregates and the polymer MTECH IN CONSTRUCTION TECHNOLOGY

14. Polymer concrete is similar to ordinary cement concrete because it contains fine and coarse aggregates, but the hydraulic binder is totally substituted with a polymer material. The aggregates are bounded together by the polymer matrix. Polymer concrete contains no cement or water. The performances of polymeric concrete depend on the polymer properties, type of filler and aggregates, reinforcing Fiber type, curing temperature, components dosage, etc., MTECH IN CONSTRUCTION TECHNOLOGY

15. 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. The resin dosage reported by various authors mostly lie in the range of 10 to 20% by weight of polymer concrete. Normally, the binder content ranges from 5% to 15% of the total weight but if the aggregate mix is fine, it may even require up to 20% binder MTECH IN CONSTRUCTION TECHNOLOGY

16. MATERIAL PROPERTIES Bending strength 20 MPa Shear strength 20 MPa Compressive strength 90 MPa Modulus of elasticity 22,000 MPa Specific gravity 2,200 kg/m3 Water absorption 0.05% by weight Operating temperature up to 80°C Surface roughness 25 um MTECH IN CONSTRUCTION TECHNOLOGY

17. APPLICATIONS Structural floors Swimming pools Pipes Storage tanks for distilled water Anti-abrasive surface Marine structures Tunnel liners Telephone cable ducts MTECH IN CONSTRUCTION TECHNOLOGY

18. Nuclear power plants. Kerbstones . Prefabricated structural element. Precast slabs for bridge decks. Roads. Marine Works. Prestressed concrete.

19. DRAINAGE .

20. POT PRECAST

21. CASE STUDY ON “Wastes as aggregate substitution in polymer concrete Author links open overlay panel” GavrilSosoi , Marinela Barbta , Adrian Serbanoiu , DanBabor,AndreiBurlacu The experimental tests were done on epoxy resin concrete with fly ash and two types of wastes (saw dust and chopped PET) as aggregate substitution in different dosages from 25% volume percentage until 100%. The waste substitution influenced the properties of concrete. Both types of wastes decreased the density of hardened polymer concrete less than 2000 kg/m3. The saw dust decreased the workability of polymer concrete. The chopped PET had improved to workability of the fresh concrete. MTECH IN CONSTRUCTION TECHNOLOGY

22. The influence of type of waste as substitution of aggregate indicated a better behavior in compression of concrete with chopped PET than that with saw dust. For dosages of 25% and 50% saw dust and 50% and 75% chopped PET the polymer concrete with waste substitution presented higher values of compressive strength than the control mix. For dosages of substitution of 50%, 75% and 100%, the mixes with PET presented higher values of fc in comparison with mixes with saw dust. MTECH IN CONSTRUCTION TECHNOLOGY

23. From the experimental research had resulted that the substitution of natural aggregates with saw dust and chopped PET wastes has as consequences. The new polymer concretes are lightweight concretes, chopped PET improved workability, for some dosages the compressive strength of both type of polymer concrete with substitution was bigger than that of the control mix and all the values of compressive strength were closed to that of control mix. MTECH IN CONSTRUCTION TECHNOLOGY

24. 7. DISADVANTAGES Resistances to physical abuse Repair of poor substrate condition Less product for the same amount of surface preparation Life cycle costing MTECH IN CONSTRUCTION TECHNOLOGY

25. 8. CONCLUSION Curing time studies on polymer concrete have established that it achieves around 70% of its strength after a curing of one day at room temperature. Durability studies on polymer concrete have established its superiority over conventional cement concrete. Exposure to water, chemical agents etc. has very less deleterious effect on properties of polymer concrete when compared to cement concrete. MTECH IN CONSTRUCTION TECHNOLOGY

26. 9. REFERENCE Polymers in Concrete, American Concrete Institute Publications SP-40, Detroit, Michigan 1973, SP-58, Detroit, 1978 2. Concrete-Polymer Materials, Five Topical Reports, Brookhaven National Loboratory and USSR 1968-1973. State-of-the-Art Report, Polymers in Concrete, ACI Committee, 548 Report, American Concrete Institute, Detroit, Michigan, 1977. PATUROEV, V.V., Technology of Polymer Concretes, Stroyzdat Press, USSR, 1977. P.K. Mehta And P.J.M. Monteiro, Concrete: Microstructure, Properties, And Materials. Concrete Technology By M.S.Shetty MTECH IN CONSTRUCTION TECHNOLOGY

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