Development of Equivalent Stress Block Parameters for Fly-Ash-Based Geopolymer Concrete

Prachasaree, Woraphot; Limkatanyu, Suchart; Hawa, Abideng; Samakrattakit, Agarat

doi:10.1007/s13369-014-1447-2

Cited by 42 publications

(19 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calculated moment capacity M cal are verified against the experimental data ( M cal ) reported in those studies. proposed by Prachasaree et al [31] and Tempest et al [32] differ from the proposed rectangular stress-block parameters of this study, there is no significant difference in the findings of these beams. Therefore, it seems that the calculation of ultimate moment capacity is not sensitive to the variation in stress-block model.…”

Section: Flexural Capacity Of Beamscontrasting

confidence: 76%

“…There has been a limited number of studies evaluating and proposing the equivalent stress-block parameters for fly-ash based GPC until now [31,32]. In the first study, the Popovics's stress-strain curve for modelling stress-strain relationship of fly-ash based GPC was calibrated by Prachasaree et al [31] to derive a set of equivalent stress-block parameters.…”

Section: Research Significancementioning

confidence: 99%

“…In spite of a large amount of studies on the rectangular stress-block parameters for conventional Portland concrete with a wide range of compressive strength, only a few studies on stress-block parameters for fly-ash based GPC under heated curing condition has been reported in the literature [31,32] analytical stress-strain curves obtained from previous studies with GPC [10,24] or measured curves from the published experimental results [8,10,13,34].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…(43), (45) and (46). The results are compared with calculations based on ACI 318-11 standard [28] and the other stress-block parameters of aforementioned studies [31,32] (summarized in Table 2). The calculated moment capacity M cal are verified against the experimental data ( M cal ) reported in those studies.…”

Section: Flexural Capacity Of Beamsmentioning

confidence: 99%

See 3 more Smart Citations

Rectangular Stress-block Parameters for Fly-ash and Slag Based Geopolymer Concrete

Tran

Pham

2019

Structures

View full text Add to dashboard Cite

Although there has been a numerous quantity of studies investigating the mechanical properties of geopolymer concrete (GPC), parameters for designing GPC structures are still not systematically investigated and carefully justified. ACI rectangular stress-block parameters is able to predict well the strength of conventional concrete structures but their applicability for GPC is questionable. This study aims to establish new sets of rectangular stress-block parameters for GPC with a broad range of the compressive strength up to 66 MPa. The proposed rectangular stress-block parameters in this study are based on two analytical concrete stress-strain models and measured curves from previous studies of GPC materials. The results from this study show that the use of ACI recommendations for concrete structure in designing GPC beams is still acceptable with high accuracy. However, the axial load-carrying capacity of GPC columns computed by ACI parameters deviate significantly from the experimental results while the proposed parameters provide a good correlation with these experimental data. The significant difference is mainly due to the modification of k 3 , which is the ratio of concrete strength in real structures to standard cylinder samples. This study suggests that the assumption of k 3 =0.9 in previous studies for conventional Portland concrete is not suitable for use in deriving the stress-block parameters of GPC. In some cases, this ratio should be reduced to 0.7 depending on the curing condition.

show abstract

Section: Flexural Capacity Of Beamscontrasting

confidence: 76%

Section: Research Significancementioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Flexural Capacity Of Beamsmentioning

confidence: 99%

See 2 more Smart Citations

Rectangular Stress-block Parameters for Fly-ash and Slag Based Geopolymer Concrete

Tran

Pham

2019

Structures

View full text Add to dashboard Cite

show abstract

“…The study of GCB under flexure has been extensively investigated by many researchers [14][15][16][17][18][19][20]. On the other hand, only a few studies dealt with the behavior of the GCB under shear [18,21].…”

Section: Introductionmentioning

confidence: 99%

Shear Strength of Geopolymer Concrete Beams Using High Calcium Content Fly Ash in a Marine Environment

et al. 2019

View full text Add to dashboard Cite

This paper deals with the behavior of a geopolymer concrete beam (GCB) under shear load using high calcium content fly ash (FA). The effect of the marine environment on the shear strength of GCB was considered by curing the specimen in a sea splashing zone for 28 days. Destructive and non-destructive tests were carried out to determine the properties of geopolymer concrete in different curing environments. Geopolymer concretes cured at room temperature showed higher compressive strength, slightly lower porosity, and higher concrete resistivity than that of those cured in sea water. From the loading test of the GCB under shear load, there was no effect of a sea environment on the crack pattern and crack development of the beam. The shear strength of the GCB generally exceeded the predicted shear strength based on the American Concrete Institute (ACI) Code.

show abstract

Development of Sustainable Concrete Using Slag and Calcined Clay

Parashar

2022

Proceedings of International Conference on Innovative Technologies for Clean and Sustainable Development (ICITCSD – 2021)

View full text Add to dashboard Cite

Development of Equivalent Stress Block Parameters for Fly-Ash-Based Geopolymer Concrete

Cited by 42 publications

References 16 publications

Rectangular Stress-block Parameters for Fly-ash and Slag Based Geopolymer Concrete

Rectangular Stress-block Parameters for Fly-ash and Slag Based Geopolymer Concrete

Shear Strength of Geopolymer Concrete Beams Using High Calcium Content Fly Ash in a Marine Environment

Development of Sustainable Concrete Using Slag and Calcined Clay

Contact Info

Product

Resources

About