The Influence of CaO Content on Mechanical Properties of Geopolymer concrete

【Author】

Qing Wang;Zhaoyang Ding;Kun Ran;Taojun Wu;

【Abstract】

<正>Geopolymer with different CaO content was produced,of which metakaolin,slag and fly ash were used as raw material,low modulus water glass(sodium silicate) was used as alkali-activator and the influence of CaO content on mechanical properties of geopolymer concrete was studied.The results show that:3d and 7d compressive strength of geopolymer concrete increase,and 28d compressive strength of geopolymer concrete decreases at first and increases as the CaO content increases,the 28d compressive strength of geopolymer concrete reaches 41.10 Mpa with the CaO content of 20%.

【Keywords】

Metakaolin;;Slag;;Fly ash;;Geopolymer concrete;;CaO content

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