A Comparative Study of Properties of Ambient-Cured Recycled GGBFS Geopolymer Concrete and Recycled Portland Cement Concrete

Fallah, Mohsen; Mousavinejad, Seyed Hosein Ghasemzadeh

doi:10.1061/(asce)mt.1943-5533.0004563

Cited by 6 publications

(4 citation statements)

References 47 publications

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“…As shown in Figure 12b, most of the data points fall within the 10% error interval (blue shaded area). In particular, the experimental results from Fallah et al [56] are effectively predicted by our prediction model. Like in the present study, in Fallah's study, more slag was used to achieve strengths of 50 MPa and above.…”

Section: Referencesmentioning

confidence: 72%

“…Some areas in strongly alkaline environments undergo a short hairline reaction period, resulting in a more viscous matrix with a reduced slump. Related studies have shown that slump decreases with increasing regeneration of aggregates [56].…”

Section: Fresh Propertiesmentioning

confidence: 88%

“…The data introduced are all experimental data of recycled aggregate geopolymer concrete with fly ash and slag as precursors, all exhibiting high elastic moduli and strengths. Fallah et al [56] and Xie et al [27] used recycled coarse aggregate prepared from ordinary construction concrete waste, while Zheng et al [55] used recycled brick aggregate. As shown in Figure 12b, most of the data points fall within the 10% error interval (blue shaded area).…”

Section: Referencesmentioning

confidence: 99%

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Compressive Behaviors of High-Strength Geopolymeric Concretes: The Role of Recycled Fine Aggregate

Zhong,

Fu,

Feng

et al. 2024

Buildings

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In this study, natural fine aggregates (NFAs) in high-strength fly ash (FA)/ground granulated blast furnace slag (GGBFS)-based geopolymer concretes were both partially and completely replaced by RFAs to prepare geopolymer recycled fine aggregate concrete (GRFC). Herein, the impacts of RFA content (0%, 25%, 50%, 75%, and 100%) on the fresh and hardened performance and microstructural characteristics of a GRFC were investigated. The results indicated that with increasing RFA substitution ratio, the setting time of the GRFC decreases. In addition, the compressive strength and elastic modulus decrease. However, owing to the enhanced adhesion of the geopolymer matrix and recycled aggregate, RFA has a relatively small impact on the compressive strength, with a maximum strength loss of 9.7% at a replacement level of 75%. When the RFA content is less than 75%, the internal structure of the concrete remains relatively compact. The incorporation of RFA in concrete has been found to adversely affect its compressive strength and elastic modulus, while simultaneously increasing its brittleness. The increase in dosage of RFA leads to a reduction in the compressive strength and elastic modulus of concrete, while partial failure occurs when the GRFC constitutes 100% of the RFA. The existing stress–strain model for conventional concrete is recalibrated for the GRFC. Observed by SEM, with increasing RFA, the damage is mainly concentrated at the interface associated with the attached cement. Although the recalibrated model predicts the stress–strain responses of the GRFC reasonably well, an acceptable range of deviation is present when predicting the residual stress due to the relatively high strength and brittle behavior of the GRFC during compression. Through this research, the applicability of RFA is expanded, making it feasible to apply large quantities of this material.

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Section: Referencesmentioning

confidence: 72%

Section: Fresh Propertiesmentioning

confidence: 88%

Section: Referencesmentioning

confidence: 99%

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Compressive Behaviors of High-Strength Geopolymeric Concretes: The Role of Recycled Fine Aggregate

Zhong,

Fu,

Feng

et al. 2024

Buildings

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“…Studentized residuals are the values obtained by dividing the residuals by the standard deviation, which are used to visually determine whether the residuals follow a normal distribution [17][18][19]. The studentized residuals can be derived from the ordinary residuals, which plays a very important role in the diagnosis of regression model [20,21].…”

Section: The Residual Of the Modelsmentioning

confidence: 99%

Mixture ratio optimization of basalt fiber recycled aggregate concrete based on RSM

Li,

Sun

2024

Mater. Res. Express

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In this paper, the effects of W/B ratio, recycled aggregate (RA) content and basalt fiber (BF) dosage on the compressive strength, splitting tensile strength and slump of concrete were investigated and a regression model was developed for analysis and prediction, and the regression model was validated using ANOVA and confidence analysis. Statistical analysis revealed that W/B ratio, RA content and BF dosage had significant effects on all properties of concrete. The established regression model fits the experimental data well and can accurately predict the properties of concrete. It was also found that there was a significant interaction between W/B ratio and BF dosage, as well as RA content and BF dosage, which suggests that the combination of these factors should be considered in the design of concrete mix to achieve optimum performance. The predicted values of compressive strength, split tensile strength and slump of concrete under optimum proportioning were in good agreement with the experimental values. Therefore, optimizing the concrete proportion by response surface methodology can improve the testing efficiency and obtain basalt fiber recycled aggregate concrete that meets the design requirements and has better overall performance.

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Development of metakaolin based high strength recycled aggregate geopolymer concrete

Gopalakrishna

Dinakar

2023

Construction and Building Materials

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A Comparative Study of Properties of Ambient-Cured Recycled GGBFS Geopolymer Concrete and Recycled Portland Cement Concrete

Cited by 6 publications

References 47 publications

Compressive Behaviors of High-Strength Geopolymeric Concretes: The Role of Recycled Fine Aggregate

Compressive Behaviors of High-Strength Geopolymeric Concretes: The Role of Recycled Fine Aggregate

Mixture ratio optimization of basalt fiber recycled aggregate concrete based on RSM

Development of metakaolin based high strength recycled aggregate geopolymer concrete

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