The long-term creep and shrinkage behaviors of green concrete designed for bridge girder using a densified mixture design algorithm

Huynh, Trong‐Phuoc; Hwang, Chao‐Lung; Limongan, Andrian H.

doi:10.1016/j.cemconcomp.2017.12.004

Cited by 27 publications

(19 citation statements)

References 41 publications

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“…Figure a–d shows the effect of CFA on shrinkage. The 15% CFA no‐cement mortar samples showed the lowest shrinkage strain value in the earlier ages, which is likely explained by the pozzolanic and filler effects . However, at later ages, drying shrinkage was significantly and negatively associated with the level of CFA.…”

Section: Resultsmentioning

confidence: 87%

Physical–microstructural evaluation and sulfate resistance of no‐cement mortar developed from a ternary binder of industrial by‐products

Hwang

Huynh

2020

Env Prog and Sustain Energy

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The present research evaluates the physical properties and microstructure of no‐cement mrtar specimens, which were developed using three waste materials, rice husk ash (RHA), ground granulated blast furnace slag (GGBFS), and circulating fluidized bed combustion fly ash (CFA), as binders. Various weight ratios of GGBFS/RHA were used (100/0, 15/85, 30/70, and 45/55), and CFA was added at ratios of 10, 15, and 20% of total binder weight. Slump flow and unit weight were used to evaluate the fresh properties of the no‐cement mortar samples, while hardened properties of the mortar samples were evaluated through compressive strength (CS) and drying shrinkage tests. In addition, scanning electron microscopy/energy dispersive spectrometer and X‐ray diffraction patterns were used to analyze the microstructure of the samples, while visual examination and loss CS tests were used to estimate sulfate resistance. As a result, the inclusion of RHA required a higher amount of superplasticizer in order to achieve a similar flowability with RHA‐free mortar and remarkably reduced the fresh unit weight of the mortar mixture. In addition, the partial replacement of GGBFS with RHA up to 30% improved the 120‐day CS of mortar specimens with 10, 15, and 20% CFA content by 8.8, 10.4, and 10.1%, respectively. Moreover, the developed no‐cement mortars exhibited excellent performance against sulfate attack. Higher CFA content in the mixtures also generated higher volumes of hydration products and ettringite gel, which further increased mortar strength.

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Section: Resultsmentioning

confidence: 87%

Physical–microstructural evaluation and sulfate resistance of no‐cement mortar developed from a ternary binder of industrial by‐products

Hwang

Huynh

2020

Env Prog and Sustain Energy

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“…For example, Kim et al (1998), Rols et al (1999), Chan et al (2003), Klug and Holschemacher (2003), Chopin et al (2003), Turcry and Loukili (2003), Heirman and Vandewalle (2003), Turcry et al (2006), Loser and Leemann (2009), Valcuende et al (2012) and Bhirud and Sangle (2017) pointed out that SCC can exhibit higher shrinkage compared with NC. However, other investigators such as Persson (2001), Bouzoubaa and Lachemi (2001), Pons et al (2003), Vieira and Bettencourt (2003), Poppe and De Schutter (2005), Seng and Shima (2005), Collepardi et al (2005), Pierard et al (2005) and Assié et al (2007) concluded that the shrinkage strains of SCC are equivalent to those of NC with similar compressive resistance, and in some cases it was even found that the shrinkage of SCC was lower than NC (Proust and Pons, 2001, Heirman et al, 2007, Huynh et al, 2018.…”

Section: Introductionmentioning

confidence: 99%

Long-term drying shrinkage of self-compacting concrete: Experimental and analytical investigations

Abdalhmid

Ashour

Sheehan

2019

Construction and Building Materials

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“…Long-term deflections of reinforced concrete (RC) beams due to creep may cause cracking and damage, significantly compromising the durability and sustainability of concrete structures [6][7][8]. Concrete creep and the associated long-term deflections are both influenced by environmental conditions (e.g., the temperature and ambient humidity) [9][10][11][12][13], mixing proportions [14,15], material properties [16], and applied stresses [17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Variable Humidity on the Creep Behavior of Concrete and the Long‐Term Deflection of RC Beams

2018

Advances in Civil Engineering

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The influences of variable humidity on the creep behaviors of concrete and the long-term deflections of RC beams are analyzed in this paper. A total of 6 prismatic specimens and 5 RC beams were subjected to sustained loads and 3 types of variable humidity conditions for 331 days. The creep strains of the prismatic specimens and the deflections of the RC beams were recorded to investigate the long-term deformation characteristics. The test results reveal that both the creep strain and the deflection of specimens under cyclic humidity conditions exhibit approximately linear tendencies that are obviously less than those of specimens exposed only to natural air. During certain wetting cycles, the deformation rate became slower and the creep strain even recovered with an increase in the humidity, especially for shorter wetting-drying cycles. Long-term deflections predicted using the CEB-FIP 90 and ACI 209R models were compared with the test results to evaluate the versatility of these current specifications. The findings included rather large errors between the predicted results and experimental data when the average relative humidity was adopted in the analytical models.

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The long-term creep and shrinkage behaviors of green concrete designed for bridge girder using a densified mixture design algorithm

Cited by 27 publications

References 41 publications

Physical–microstructural evaluation and sulfate resistance of no‐cement mortar developed from a ternary binder of industrial by‐products

Physical–microstructural evaluation and sulfate resistance of no‐cement mortar developed from a ternary binder of industrial by‐products

Long-term drying shrinkage of self-compacting concrete: Experimental and analytical investigations

Effects of Variable Humidity on the Creep Behavior of Concrete and the Long‐Term Deflection of RC Beams

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