METHOD FOR PREDICTING THE COMPRESSIVE STRENGTH OF CONCRETE AND MORTAR CONTAINING FLY ASH

摘要

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction.The invention includes a method for predicting the compressive strength of such a hardenable mixture, which is very important for planninga project. The invention also relates to hardenable mixtures comprising cement and fly ash which can achieve greater compressive strengththan hardenable mixtures containing only concrete over the time period relevant for construction. In a specific embodiment, a formula isprovided that accurately predicts compressive strength of concrete containing fly ash out to 180 days. In other specific examples, concreteand mortar containing about 15 % to 25 % fly ash as a replacement for cement, which are capable of meeting design specifications requiredfor building and highway construction, are provided. Such materials can thus significantly reduce construction costs.