Ecofriendly Concrete with High Volume of Lagoon Ash

Abstract

A high volume of lagoon (pond) ash produced as a waste from the thermal power station in India is used as a replacement of cement (55–65%) in concrete. The test specimens were prepared with and without superplasticizer. No air-entraining agent was used. At constant slump, the required amount of water reduced with the addition of lagoon ash. The slump retention property of the concrete with superplasticizer and lagoon ash was studied. A substantial increase in the setting time (initial and final) was observed. The development of early strength (1,3 days) was low. The 28-day strength for concrete with lagoon ash, without the addition of superlasticizer, was in the range of 16.4–24.3 MPa for 65 and 55% cement replacement, respectively. The change in strength of concrete was observed over a period of 365 days in the present study. The investigation shows a scope to utilize lagoon ash in concrete. An attempt was made to use lagoon ash in the concrete mix, referred as dry lean concrete, used as base course for ...