Investigating some effects of using Metakaolin as pozolan in concrete

Subject Areas : Analysis of Structure and Earthquake

Gholamreza saghir shams abadi ¹ , Abdolkarim Abbasi dezfoli ²

1 -
2 - استادیار واحد اهواز

Received: 2016-02-16 Accepted : 2016-05-28 Published : 2017-02-04

Keywords: permeability, Mechanical Properties, pozolan, Metakaolin, relative density,

Abstract :

Development of concrete technology is undergoing for achieving high strength concrete. Metakaolin (MK) for obtaining high strength and durable concrete recently is used in industry. The relatively high micro particles and pozolan activity and reaction with calcium hydroxide of cement, causes lower voids, permeability and increasing durability. In the present research the history of pozolans and their materials specially MK and their effects on mechanical properties to achieve an optimize percentage of MK instead of cement were investigated. The tests are included as workability, absorbing water, relative density, electric resistance (that shows permeability and corrosion resistance) and compressive strength. The tests were carried out on 0%, 10%, 15% and 20% of MK in replacement of cement on 150x150 mm samples on 7 and 28 days after casting. The results show that 10% of MK has better workability. 15%  of MK higher compressive strength and 20% higher electric resistance and lower absorbing water and 15% have a reduced relative density