Concrete is the second most consumed material in the world, second only to water, so the
study carried out made it possible to evaluate the partial replacement of cement by
biomass ash in conventional concrete, in which it sought to mitigate the costs involved in
the disposal of ash, the reuse through its reinsertion in the production chain and the
reduction of the emission of greenhouse gases, due to the clinker factor. This work took
place through an experimental planning performed by the methodology of the design of
the rotational central compound (DCCR) that took into account the content of
replacement of cement by ash and the curing time of the concrete, where the influences
of these parameters were mapped to the values of substitution contents between 2% and
18% and the curing time of the concrete between 0 and 35 days, covering from initial
ages to final ages. The objective of this study was to optimize the choice of the best
combinations in order to achieve the best results, which was obtained through the
response surface graph found for each of the responses of compressive strength, tensile
strength by diametrical compression and water absorption. After carrying out the tests
and all the analysis performed, it was concluded that despite the ash having some
parameters outside the specifications of the regulations, it presented satisfactory results,
allowing to reach the trait with the best performance, which occurred for the substitution
content of 2, 05% and curing time of 26.20 days, which resulted in 36.82 ± 2.58 MPa.
The results also showed that this partial replacement is an alternative that, in addition to
being sustainable, due to the clinker factor, also has great technical feasibility as it can be
used for both conventional and structural use, and also helps to reduce pollution, reduce
consumption of non-renewable materials and reinserts materials into the production
chain.
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