PERFORMANCE OF CONCRETE CONTAINING FLY ASH AT EARLY AGES

The adiabatic temperature increase of concrete containing various percentage of fly ash was measured to understand heat emission during hydration. A temperature-matching curing (TMC) schedule in accordance with adiabatic temperature increase is adopted to simulate the situation in real massive concrete. The performance of concrete cured both in TMC and standard conditions were investigated. The possibility of prediction of strength in real structures using an equivalent age approach is discussed. The hydration of high volume fly ash concrete is delayed slightly. Its final degree of hydration is high enough under the condition of low water-binder (W/B) ratio to make the adiabatic temperature increase higher than the concrete containing a lower percentage percent of fly ash. Elevated temperatures enhance the hydration of binder to benefit the gain of compressive and flexural strength of the concrete containing complex binder.

• INTRODUCTION

• EXPERIMENTAL

• RESULTS AND DISCUSSION

• CONCLUSIONS

• REFERENCES