Comparitive Study on Conventional and Geopolymer Concrete with and without Poly Propylene Fiber

Comparitive Study on Conventional and Geopolymer Concrete with and without Poly Propylene Fiber

1st P Narasimha reddy 2nd Manohar K M

Civil Department Civil Department

Kns institute of technology Kns institute of technology

Bangalore , karanataka ,india Bangalore , karanataka ,india

3rd Chinmayee Aradhya c 4th Anantha Sayana Reddy M

Civil Department Civil Department

Kns institute of technology Kns institute of technology

Bangalore , karanataka ,india Bangalore , karanataka ,india

Abstract Geopolymer is emerging as an alternate green material in the construction industry in order to produce ecofriendly concrete. it is necessary to replace cement by industrial by products such as flyash , GGBS with alkaline liquid such as sodium hydroxide of 8M and 10M and sodium silicate solution by varying percentage of polypropylene fiber 0.9 and 1.35kg per m3 to the volume of the binder content for M40 mix designation. The main focus to study will be investigating the increasing the compressive strength of the concrete after adding polypropylene fiber.

Keywords Geopolymer GPC; Conventional concrete CC; flyash; GGBS (ground granulated blast furnace slag); alkaline solutions sodium hydroxide, sodium silicate (NaOH,Na2sio3);

Here the experimental investigation of compressive strength, tensile strength & thermal resistance of the GPC with & without polypropylene fiber.

1. METHADOLOGY

   1. MATERIALS USED

      • Cement = OPC (53) (BIRLA SHAKTHI CEMENT).

      • Fine aggregate =Thalakadu River sand

      • Coarse aggregate = 20mm aggregates

      • Fly ash = (Thermal power plant Raichur)

      • GGBS = (JSW Thoranagallu Bellary)

      • Alkaline liquids = NaOH, Na SiO

        Polypropylene fiber-PPF. 2 3

        I. INTRODUCTION

        In order to control the given house effect due to the release of co2 to the environment during calcination process. Hear the contemporary material is using called geo-polymer concrete thus not mandatory here are we are completely replacing the cement from sly-ash and GGBS and water by alkaline solutions such as NaoH and Na2Sio3 for the using of GPC is done by sun light .

        The Polypropylene fiber used by various densities. It is good in tenacity and resiliency properties. The main advantages of Recron 3s virgin Polypropylene fiber are rebound loss reduced by 50% o 70% results in saving expensive mortar, binding material and sand. Time taken for plastering is reduced & work is completed faster, reduces cracks during plastering and hardening stages.

        Reduces water seepages and protects steel in concrete from corroding & water from dampening, protects corners in pre-cast slabs & concrete flooring, increases abrasion resistance by 40% there by increasing life of roads walkways, floor, also reduce pitting of the floor.

        • Polypropylene fiber = recorn 3s (expected ratio 1:300)

        • Chemical admixture = super plasticizers (complast sp430)

   2. MIX DESIGN

      Mix design for M40 grade concrete by referring IS 10262- 2009

      • Total quantities of materials for 1 m3 conventional concrete

        • Cement content = 350kg/m3

        • Water content = 157.6 kg/m3

        • Fine aggregate =708.9 kg/m3

        • Coarse aggregate = 1225.40 kg/m3

        • Chemical admixture =3.5kg/m3

        • w/c =0.4

      Mix design for G40 grade concrete by referring IS 10262- 2009

      • The total quantities of materials for 1 m3 of Geo-polymer concrete

        • Mass of binder = 345 kg/m3

        • Mass of fluid = 59.14 kg/m3

        • Mass of Na2SiO3=147.85 kg/m3

        • Fine aggregate = 831.6 kg/m3

        • Coarse aggregate = 1016.4 kg/m3

   3. TESTS

      • Compressive strength test

      • Split tensile strength test

      • Temperature effect

2. RESULTS

   Type of cubes	Compressive strength in Mpa	Tensile strength in Mpa
   Without fiber	40.55	2.88
   With fiber of 0.9 kg/m3	45.02	3.2
   With fiber of 1.35 kg/m3	48	3.65

   TABLE 1 .CC after 28 days of water curing:-

   Type of cubes	Compressive strength in Mpa	Tensile strength in Mpa
   Without fiber	45.55	3.88
   With fiber of 0.9 kg/m3	49.02	4.2
   With fiber of 1.35 kg/m3	52.13	4.65

   Table 5. GPC 10M of 14 days sunlight curing :-

   Table 2. CC after temperature effect :-

   Type of cubes	Initial Compressive strength in Mpa	Final Compressive strength in Mpa	Loss of strength in %
   Without fiber	40.55	35	13.68
   With fiber of 0.9 kg/m3	45.02	39.06	13.23
   With fiber of 1.35 kg/m3	48	41.52	13.50

   Table 3. GPC 8M of 14 days sunlight curing :-

   Type of cubes	Compressive strength in Mpa	Tensile strength in Mpa
   Without fiber	44	3.02
   With fiber of 0.9 kg/m3	47.05	3.48
   With fiber of 1.35 kg/m3	50.02	3.95

   Type of cubes	Initial Compressive strength in Mpa	Final Compressive strength in Mpa	Loss of strength in %
   Without fiber	44	39.55	10.12
   With fiber of 0.9 kg/m3	47.05	42.50	09.68
   With fiber of 1.35 kg/m3	50.02	45.30	09.44

   Table 4. GPC 8M after temperature effect :-

   Table 6. GPC 10M after temperature effect :-

   Type of cubes	Initial Compressive strength in Mpa	Final Compressive strength in Mpa	Loss of strength in %
   Without fiber	45.55	41.38	09.34
   With fiber of 0.9 kg/m3	49.02	44.59	09.12
   With fiber of 1.35 kg/m3	52.13	48.30	08.98

   Fig.1 Compressive strength of CC and GPC (8M &10M) cubes

   Fig.2 Tensile strength of CC and GPC (8M & 10M) cubes

   Fig.3 Loss of compressive strength CC Cubes after Temperature effect

   Fig.4 Loss of compressive strength GPC 8M Cubes after Temperature effect

   Fig.5 Loss of compressive strength GPC 10M Cubes after Temperature effect

3. CONCLUSION

Conventional concrete cubes casted and cured. Then it attains its strength after 28days of water curing. But the geo-polymer concrete attains its strength within 14 days under sunlight curing.

Compressive strength :-

By the comparative study of conventional concrete with and without PPF by the considering the test results. The compressive strength slightly increased in which PPF is added. And also by considering the test results of GPC of 8M & 10M the compressive strength of 10M cubes gains high strength.

Tensile strength :-

By considering the test results have been studied and compared, CC cubes having the fiber shown high tensile strength. As in the GPC also 10M cubes having fiber shown high tensile strength than CC cubes.

Temperature effect :-

Temperature effect is conducted on concrete cubes in laboratory by maintain temperature 100 0c constant.

Test results shows that there is consistence increase in 8-14 % loss of strength, by studying this effect. As temperature increases the lead formation of etringite reduce the strength absorbed more strength reduction in case of CC without PPF than GPC cubes.

REFERENCE

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13. IS Codes Used

14. IS: 10262-2009, recommended guideline for concrete mix design.

15. IS: 383-1970, Specification for coarse and fine aggregate from natural resources for concrete.

16. IS: 456-2000, Plain and Reinforced Concrete Code of Practice.

17. IS: 516-1959, Indian standard methods of test for strength of concrete.

18. IS: 5816-1999, Splitting tensile strength of concrete-Method of test.

19. IS: 1199-1959, Indian standards methods of sampling and analysis of concrete.

20. IS: 12269-1987, Specification for 53 grade ordinary Portland cement.

21. IS: 13311-1992, Methods of non-destructive testing of concrete: part 1 Ultrasonic pulse velocity.