A genetic programming predictive model for parametric study of factors affecting strength of geopolymers

Leong, Hsiao Yun; Ong, Dominic Ek Leong; Sanjayan, Jay

doi:10.1039/c5ra16286f

Cited by 30 publications

(20 citation statements)

References 21 publications

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“…The more curing temperature increased, the more compression strength did also, with agreeing results regarding those from other works [1] [7] [8] [47]- [53], which re-ported that using curing temperatures between 40˚C and 80˚C between 4 and 48 hours is one of the important conditions for the synthesis of GP [46]. Some researchers found that the curing temperature was a reaction accelerator in fly ash-based GP.…”

Section: Curing Temperature: Factor Bsupporting

confidence: 81%

“…The influence of the activator concentration on the compressive strength performance GP obtained by MK or other precursors as fly ash and slags [1] [18] [30]. Additionally, these confirm that there should be an optimum ratio to have the highest strength [8] [31] [32]. In this case, where KOH has been found, the K + by binding to…”

Section: Activator Concentration [Koh]: Factor Amentioning

confidence: 85%

“…This study of factors only shows the effects of factors on compressive strength. To analyze this effect, minimum and maximum values of a specific factor are used [8]. The influence of factors is described of statistical significance.…”

Section: Effect Of Factors On Compressive Strength Of Gpmentioning

confidence: 99%

“…While some of researches showed the increased strength with high alkaline concentration, others presented the negative impact of this on the strength. Curing at temperatures above room temperature is reported to favor the development of high compressive strength [3]- [8];…”

Section: Introductionmentioning

confidence: 99%

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Compressive Strength of Metakaolin-Based Geopolymers: Influence of KOH Concentration, Temperature, Time and Relative Humidity

García-Mejía¹,

Chávez-García²

2016

MSA

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The influence of KOH concentration (8 and 12 M) and curing conditions as temperature (40˚C and 60˚C), time (7 and 28 days) and relative humidity (85% and 95% RH), on compressive strength of metakaolin-based geopolymers (MK-based GP) was evaluated. Derived from the experimental design technique, and using a factorial design 2 K with two replications in the center point, eighteen experiments were conducted. The results reveal that the best performance conditions of geopolymerization to develop a higher compressive strength of 20 MPa are 12 M KOH to 60˚C and 85% RH at 28 curing days. With these conditions, the value of relative humidity of 85%, promotes high strength compact samples, and a maximum of 42 MPa at 90 days. The results of significant, compressive design of GP showed that KOH concentration and curing relative humidity were the most important factors, followed by curing time and temperature. The GP were characterized by XRD, and their evolution on compression strength was followed by SEM.

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Section: Curing Temperature: Factor Bsupporting

confidence: 81%

Section: Activator Concentration [Koh]: Factor Amentioning

confidence: 85%

Section: Effect Of Factors On Compressive Strength Of Gpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compressive Strength of Metakaolin-Based Geopolymers: Influence of KOH Concentration, Temperature, Time and Relative Humidity

García-Mejía¹,

Chávez-García²

2016

MSA

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“…Sarawak fly ash has been successfully used in a handful of studies (Leong et al 2015;Leong et al 2016a;Leong et al 2016b). Table 1 shows the chemical compositions of the fly ash using WD-X-ray Fluorescence Spectrometer (WD-XRF).…”

Section: Fly Ashmentioning

confidence: 99%

Strength Development of Soil–Fly Ash Geopolymer: Assessment of Soil, Fly Ash, Alkali Activators, and Water

Leong

Ong

Sanjayan

et al. 2018

J. Mater. Civ. Eng.

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In this study, fly ash was added to residual soil to produce soil-fly ash geopolymer bricks. This study investigated the effects of fly ash/soil, alkali activator/ash, Na2SiO3/KOH (or NaOH), additional water content, curing condition and curing temperature on the compressive strength of soil-fly ash geopolymer. The results showed that the optimum compressive strength was obtained when the ratios of alkali activator/ash, Na2SiO3/KOH (or NaOH) and additional water were 0.6, 0.5 and 10 % respectively. Higher amount of alkali activators was required for strength development in soil-fly ash geopolymer than conventional fly ash-based geopolymers. The formation of the rigid structure at low ratios of alkali activator/ash and Na 2SiO3/KOH (or NaOH) was unlikely. Compressive strength decreased when additional water was increased. High curing temperature and long curing duration showed negative effect on strength development. The compressive strength of soil-fly ash geopolymer varied as different mixing sequences of raw materials were used, indicating the importance of the formation of geopolymer gel in the structure. Compressive strength results obtained in this study demonstrate that soil-fly ash geopolymer can be a potential alternative to traditional clay fired brick.

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Runway Grooving Techniques and Exploratory Study of the Deterioration Model

Miah

Chai³

et al. 2022

Lecture Notes in Civil Engineering

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The friction of runway pavement is critical for the safety of aircraft landing and movement on the runway. Tire hydroplaning may lead the aircraft to move off the runway and hinder the safe landing during wet weather conditions. Grooving on the runway is one way to develop frictional braking resistance and diminish hydroplaning's potential risk by improving runway surface drainage capacity during damp weather. According to the Federal Aviation Administration (FAA), groove construction must follow specific dimensions to maintain skid-resistant airport pavement surfaces. However, the groove area can be reduced for several reasons, and regrooving is essential if 40% of the runway groove of a substantial length decreased to 50% of its original dimension. Grooves initiate different potential distress mechanisms that are not found in an ungrooved pavement surface. Groove closure in different airports with hot weather is a frequent and prominent form of distress that substantially declines the grooves' effectiveness. Moreover, the degree of the declination of groove dimensions has not been quantified in a theoretical method. This paper discussed the current technique and importance of runway grooving. In addition to this, this paper reviews different potential distress mechanisms and issues related to groove deterioration. Finally, a brief of a predictive modeling requirement is illustrated, which is significant for the authority concern for maintenance and reinstate the grooving in the runway for friction development.

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A genetic programming predictive model for parametric study of factors affecting strength of geopolymers

Abstract: Genetic programming to present a predictive model for parametric analysis of the factors affecting compressive strength of geopolymers.

Cited by 30 publications

References 21 publications

Compressive Strength of Metakaolin-Based Geopolymers: Influence of KOH Concentration, Temperature, Time and Relative Humidity

Compressive Strength of Metakaolin-Based Geopolymers: Influence of KOH Concentration, Temperature, Time and Relative Humidity

Strength Development of Soil–Fly Ash Geopolymer: Assessment of Soil, Fly Ash, Alkali Activators, and Water

Runway Grooving Techniques and Exploratory Study of the Deterioration Model

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