Analysis of the effect of material dosages on the compressive strength of alkali activated fly ash concrete at different ages
In order to improve the practical application of alkali-activated fly ash concrete in engineering,the variation law of com-pressive strength of alkali activated fly ash concrete at different ages(7、28、56 d)was studied based on different dosages of alkali acti-vator(quicklime powder)(5%、8%、10%)and fly ash(10%、15%、25%).The results showed that under the condition of constant con-tent of quicklime powder,the 7-day compressive strength of alkali-activated fly ash concrete gradually decreased with the increase of fly ash content;at the ages of 28 and 56 days,the compressive strength of alkali-activated fly ash reached its maximum when the fly ash content was 15%.Under the condition of constant fly ash content,when the content of quicklime powder increased from 5%to 8%,the compressive strength of alkali-activated fly ash concrete at all ages increased;when the content of quicklime powder in-creased from 8%to 10%,the compressive strength of alkali activated fly ash concrete at all ages decreased.
material dosagesagealkali activationquicklime powderfly ashconcretecompressive strength
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