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Modeling and statistical assessments to evaluate the effects of fly ash and silica fume on the mechanical properties of concrete at different strength ranges

Modeling and statistical assessments to evaluate the effects of fly ash and silica fume on the... Abstract The main objective of this research is to quantify the effect of fly ash content (FA) and silica fume content (SF), water/cement ratio (w/c), and curing time (t) on the compressive strength (CS), flexural strength (FS) and tensile strength (TS) of normal strength concrete (NSC) high strength concrete (HSC) up to 90 days of curing. More than 1000 experimental data were collected from different research studies. Statistical analysis and modeling were performed on the collected data. The w/c ratio for concrete modified with fly ash (up to 90%) and the concrete modified with silica fume (up to 45%) was ranged between 0.19–0.87, 0.25–0.55, and 0.2–0.80, respectively. The compressive, flexural, and tensile strengths ranges for concrete were 10.5–81.9 MPa, 2.6–9.9 MPa, and 0.41–6.1 MPa, for concrete modified with FA were 13.8–79.9 MPa, 2.53–10.4 MPa, and 0.30–6.5 MPa and for concrete modified with SF were 2.9—99.3 MPa, 3.8–11.9 MPa, and 1–6.6 MPa respectively. The compressive strength was correlated very well to the flexural and tensile strength. Based on the coefficient of determination (R2) and root mean square error (RMSE) the compressive strength, flexural strength, and tensile strength of concrete as a function of w/c ratio, FA content, SF content and curing time quantified very well using nonlinear (NLM) relationship. Based on the NLM parameters, the effect of FA and SF were less than w/c ratio and curing time on the mechanical strength of modified concrete in different strength ranges. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Modeling and statistical assessments to evaluate the effects of fly ash and silica fume on the mechanical properties of concrete at different strength ranges

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References (98)

Publisher
Springer Journals
Copyright
2020 Springer Nature Switzerland AG
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-020-00091-1
Publisher site
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Abstract

Abstract The main objective of this research is to quantify the effect of fly ash content (FA) and silica fume content (SF), water/cement ratio (w/c), and curing time (t) on the compressive strength (CS), flexural strength (FS) and tensile strength (TS) of normal strength concrete (NSC) high strength concrete (HSC) up to 90 days of curing. More than 1000 experimental data were collected from different research studies. Statistical analysis and modeling were performed on the collected data. The w/c ratio for concrete modified with fly ash (up to 90%) and the concrete modified with silica fume (up to 45%) was ranged between 0.19–0.87, 0.25–0.55, and 0.2–0.80, respectively. The compressive, flexural, and tensile strengths ranges for concrete were 10.5–81.9 MPa, 2.6–9.9 MPa, and 0.41–6.1 MPa, for concrete modified with FA were 13.8–79.9 MPa, 2.53–10.4 MPa, and 0.30–6.5 MPa and for concrete modified with SF were 2.9—99.3 MPa, 3.8–11.9 MPa, and 1–6.6 MPa respectively. The compressive strength was correlated very well to the flexural and tensile strength. Based on the coefficient of determination (R2) and root mean square error (RMSE) the compressive strength, flexural strength, and tensile strength of concrete as a function of w/c ratio, FA content, SF content and curing time quantified very well using nonlinear (NLM) relationship. Based on the NLM parameters, the effect of FA and SF were less than w/c ratio and curing time on the mechanical strength of modified concrete in different strength ranges.

Journal

Journal of Building Pathology and Rehabilitation – Springer Journals

Published: Dec 1, 2020

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