Open AccessAnalysis of flexural capacity in hybrid high strength reinforced concrete beams with additive, fine aggregate, and coarse aggregate substitutions
Author(s) -
Dewi Septiningtyas Hastuti,
Teuku Budi Aulia,
Maraghi Muttaqin
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/933/1/012020
Subject(s) - flexural strength , materials science , aggregate (composite) , fly ash , composite material , superplasticizer , silica fume , cement , compressive strength
High-strength concrete is formed with a low water-cement ratio value, so it requires large amounts of cement, aggregate, and additives (silica fume) and admixture superplasticizer. Therefore it is necessary to do further research on the use of additional substitute materials. This study aims to analyze the flexural capacity of high-strength hybrid concrete beams using materials from Charcoal combustion fly ash, palm, pozzolanic sand, and hematite nanomaterials as additives and aggregate substitutions. In this study, 7 beams measuring 15 x 30 x 220 cm were tested for each additive variation and aggregate substitution of one specimen and one normal beam specimen. The test object is designed to experience flexural failure. The results showed that all beams failed flexibly as planned. The highest flexural capacity in reinforced concrete beams with additive variation of Charcoal fly ash and substitution of palm shell fine aggregate (BBMTHBB - KCS) is 257.707 KN or 14.217% higher than reinforced concrete beams without additive and substitution variations ( BBMTH Normal) with a value of flexural capacity of 225.628 KN. It can be concluded that additive variation and aggregate substitution can increase the value of flexural and deflection capacity but are unable to add ductility values to high-strength hybrid concrete.