Study On The Approach To Admixture Increasing Eraly Strength Of Lime And Fly-Ash Stabilized Aggregate

The thesis theoretically analyzes the intensity structure of lime and fly ash mixture on the basis of information from survey and research, concluding that using admixture could greatly improve the early intensity of lime and fly ash granule. Select the admixture on basis of theoretical analysis, and then firstly mix single admixture and experiment on the anti-pressure after 7 days, 28 days'standard maintenance. Secondly choose three kinds of admixture as early intensity admixture, which are dissolvable into water and cheaper, for further experiment. The results of further experiments prove that compound with two kinds of admixture do not have better effect. The contrast proves that sodium hydroxide and sodium carbonate are better early intensity admixture of lime and fly ash. On basis of lime and fly ash experiment, carry out experiment on the eagerly intensity of lime and fly ash granule improved by eagerly intensity admixture. The experiment proves that the early intensity admixture are effective in improving early intensity of lime and fly ash granule under normal temperature (20℃) and low temperature (0℃). Simultaneously carry out experiment on water content of dried small lime and fly ash granule girder, in which early intensity admixture have been added. The results of experiment comply with theoretical analysis. On basis of the above experiments, contraction experiment of lime and fly ash granule with admixture is carried out. The experiment proves that quality of anti-crack of lime and fly ash granule has not been deteriorated because of the admixture.From different aspects the thesis proves that the effect of lime and fly ash granule with early intensity admixture is evident and the early intensity measures are practical in construction.