EFEITO DA ENERGIA DE COMPACTAÇÃO NA RESISTÊNCIA MECÂNICA DE CONCRETOS SECOS COM ADIÇÃO DE CINZA PESADA E USO DE ADITIVO PLASTIFICANTE
DOI:
https://doi.org/10.46421/entac.v18i.1043Keywords:
No-slump concrete, Bottom ash, Plasticizer admixture, Compaction, Compressive strengthAbstract
The use of no-slump concrete in the manufacture of precast pieces has gained relevance in the civil construction market. The lack of specific standardization for no-slump concrete ends up hampering its technological control. In this sense, this article aims to analyze the effect of compaction energy on the compressive strength of no-slump concretes, using as parameters the compaction energy variation applied in the molding (10, 20 or 30 blows), a 30% replacement of natural sand by bottom ash and the use or not of a plasticizer admixture. The specimens were molded through compaction using a Proctor metallic compaction hammer. The results obtained indicate that compaction has a significant effect on the compressive strength of the pieces produced, highlighting the need to use equipment that guarantees efficient molding in order to guarantee the quality and durability of the pieces produced. The presence of bottom ash proved to be efficient, leading to greater resistance results for the same applied energy. The plasticizer admixture also proved to be efficient, facilitating compaction and leading to satisfactory resistance results even for the lowest applied energy. The joint action of ash and the admixture led to the best results obtained.
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