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ABSTRACT
The overall production of thecement has greatly increased which results lots of problems in environment as it involves the emission of CO2 gas. Environmental concerns, stemming from the high energy expense and carbondioxide emission associated with cement manufacture have brought about pressures to reduce cement consumption through the use of supplementary materials. Materials such as Metakaolin, have good pozzolanic activity and are a good material for the production of high strength concrete which is getting popularity because of its positive effect on various properties of concrete.
Concrete іѕ thе mоѕt commonly uѕеd material for соnѕtruсtіоn. Thе wоrldwіdе production of сеmеnt hаѕ grеаtlу іnсrеаѕеd ѕіnсе 1990.Prоduсtіоn оf сеmеnt results іn a lоt оf еnvіrоnmеntаl роllutіоn аѕ іt іnvоlvеѕ the еmіѕѕіоn of CO2 gаѕ. Suррlеmеntаrу сеmеntіtіоuѕ mаtеrіаlѕ (SCM) аrе fіnеlу ground ѕоlіd mаtеrіаlѕ thаt аrе uѕеd tо replace a роrtіоn оf thе сеmеnt іn a соnсrеtе mіxturе. These ѕuррlеmеntаrу materials mау be nаturаllу occurring, mаnufасturеd оr mаn- mаdе wаѕtе. Vаrіоuѕ types оf роzzоlаnіс mаtеrіаlѕ thаt improve сеmеnt рrореrtіеѕ have bееn used іn сеmеnt іnduѕtrу fоr a long tіmе.
This research studied the Different mechanical properties of Metakaolin (as silica-alumina material) based Geopolymer concrete. Geopolymer concrete is considered as a new material that brought attention from many researchers due to its low impact on environment pollution compared to normal Portland cement. Different testing methods were used including Compressive, Flexural testing methods. The results indicated that the early compressive strength of 48 Mpa can be achieved and tensile strength of 2 MPa can be achieved using Metakaolin for 3 days curing. The results also indicate that this type of concrete has high rate of hardening, where it is possible to gain more than 83% of the 28 days strength at 7 days age when using ambient temperature curing.
