A COMPARATIVE STUDY ON THE DEFLECTION CHARACTERISTICS OF PRESTRESSED GEOPOLYMER CONCRETE AND PORTLAND CONCRETE
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Abstract
This project is conducted to carry out a comparative study of the deflection characteristics of Prestressed geopolymer concrete and Prestressed Portland cement concrete. The objectives are to conduct tests on the materials utilized, to carry out flexural tests and other supporting tests and to analyze the results obtained from all the tests performed.
The aim of the research is to compare the deflection characteristics of Portland Cement beams and Metakaolin based Geopolymer concrete beams. The tests performed on the materials utilized were the sieve analysis test on aggregates,
specific gravity test on the kaolin, metakaolin, cement and aggregates, and the tensile test on cables, tendons and wires. The other supporting tests done were the compressive strength test of Portland Cement concrete and geopolymer concrete, and workability test on concrete. The preliminary test proved that the calcined metakaolin samples were reactive when exposed to alkaline activators and metakaolin based geopolymer concrete exceeded the strength of ordinary Portland cement concrete in short time.
The compressive strength of the 8 molarity metakaolin based geopolymer concrete was gotten as 38.267 N/mm2 after 1 day; after 5 days, it was gotten as 51.510 N/mm2; after 7 days, it was gotten as 52.651 N/mm2, and after 28 days, it was gotten as 57.950 N/mm2. The compressive strength of the 10 molarity metakaolin based geopolymer concrete was gotten as 29.262 N/mm2 after 1 day, and after 7 days, it was gotten as 38.730 N/mm2. The average moment capacity of the geopolymer concrete beams prepared from 8 molarity of NaOH was gotten 482.36 Nm. The moment capacity range of the geopolymer concrete beams prepared from 10 molarity of NaOH was gotten as 338.0 – 349.5 N/mm2.
The aim of the research is to compare the deflection characteristics of Portland Cement beams and Metakaolin based Geopolymer concrete beams. The tests performed on the materials utilized were the sieve analysis test on aggregates,
specific gravity test on the kaolin, metakaolin, cement and aggregates, and the tensile test on cables, tendons and wires. The other supporting tests done were the compressive strength test of Portland Cement concrete and geopolymer concrete, and workability test on concrete. The preliminary test proved that the calcined metakaolin samples were reactive when exposed to alkaline activators and metakaolin based geopolymer concrete exceeded the strength of ordinary Portland cement concrete in short time.
The compressive strength of the 8 molarity metakaolin based geopolymer concrete was gotten as 38.267 N/mm2 after 1 day; after 5 days, it was gotten as 51.510 N/mm2; after 7 days, it was gotten as 52.651 N/mm2, and after 28 days, it was gotten as 57.950 N/mm2. The compressive strength of the 10 molarity metakaolin based geopolymer concrete was gotten as 29.262 N/mm2 after 1 day, and after 7 days, it was gotten as 38.730 N/mm2. The average moment capacity of the geopolymer concrete beams prepared from 8 molarity of NaOH was gotten 482.36 Nm. The moment capacity range of the geopolymer concrete beams prepared from 10 molarity of NaOH was gotten as 338.0 – 349.5 N/mm2.
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