ABSTRACT The construction of high buildings has required the execution pile caps that reach thousands m3 concrete. In general, these structures are built using self-compacting and/or compressive strength concretes, resulting in binder contents. cases, use fly ash replacing Portland cement is a well-known alternative, both for reduction hydration heat and mitigation delayed ettringite formation. However, contents generally used such concretes results temperatures, creating an uncertainty about efficacy this mineral admixture heat. Thus, current work aims to evaluate effect replacement by adiabatic elevation temperature concretes. regard, were produced with three classes (35, 45 55 MPa) four ratios (0, 15, 30 45%). was monitored calorimeter 72 hours. At 28 days, specimens cured condition at room determined. Finally, pozzolanic activity evaluated thermogravimetric analysis (TGA). It found that, regardless resistance class or content ash, coefficients (corresponding variation divided consumption / concrete) quite similar. promoted on order 10% compared curing temperature. Also, confirmed TGA. Considering results, it can be concluded large masses concrete becomes inefficient alternative release. its indicated because benefits prevention

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