Abstract
The experimental investigation on alternate concrete from aged volcanic ash or hydrated aluminium silicate was done by partially replacing bentonite with OPC. For industrial purpose bentonite is available in two forms sodium bentonite and calcium bentonite. The total resources of bentonite in the country as per UNFC system are about 531 million tonnes. The partial replacement of bentonite with cement leads to reduction of cement content in concrete mix. Concrete specimens were casted and examined for the 7th, 14th and 28th days respectively. A mix ratio of 1:2:4 was adopted for 0%, 10%, 20%, 30%, 40% and 50% replacement of bentonite with cement. Test were conducted on fresh concrete and hardened concrete. Estimated results was computed for all concrete samples replaced with bentonite based on the test result done.
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