Rheological properties of concrete using dune sand

Park, Sangjun; Lee, Euibae; Ko, Jeong‐Hyeon; Yoo, Jerald; Kim, Yong-Jic

doi:10.1016/j.conbuildmat.2018.03.192

Cited by 23 publications

(8 citation statements)

References 18 publications

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“…The slope of the rheology curve obtained by linear regression analysis tended to decrease as the amount of SC increased. The slope of the rheology curve represents the plastic viscosity, and the y-intercept value represents the yield stress [ 23 , 24 ].…”

Section: Resultsmentioning

confidence: 99%

“…The rheology of the repair mortar was evaluated by referring to the results of previous studies because there is no related regulation [ 23 , 24 ]. The rheology measurement was carried out using a Brookfield DV-III Ultra mortar viscometer with a modified chamber size.…”

Section: Materials and Test Methodsmentioning

confidence: 99%

“…The Bingham model can be obtained by the correlation between shear rate and shear stress measured by the viscometer. The rheological properties of repair mortars were evaluated through the plastic viscosity and the yield stress which are the slope and the y-intercept of the Bingham model, respectively [ 23 , 24 ].…”

Section: Materials and Test Methodsmentioning

confidence: 99%

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Fundamental Properties and Self-Healing Performance of Repair Mortar with Solid Capsules Made Using Inorganic Reactive Powder

Oh¹,

Lee

Choi

et al. 2022

Materials

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Self-healing cement composites are generally produced by using materials such as inorganic powders, bacteria pellets, and microcapsules. Among them, inorganic powder-type healing materials tend to decrease in healing performance over time because they react relatively quickly. Accordingly, this study encapsulated self-healing inorganic reactive powders in solid capsules (SC) in order to delay their reaction. The capsule surface was coated with a membrane to prevent moisture from permeating it. SC were utilized to provide the self-healing effect to the repair mortar. SC were mixed at three rates (0%, 5%, and 10%) by the binder mass of the repair mortar. The fundamental properties, including rheology, table flow, strength, and length change, and the self-healing performance of the self-healing repair mortar mixes were investigated. It was found that the rheological and mechanical properties of the repair mortar decreased slightly as the amount of SC increased. On the other hand, for a crack width of 0.25 mm and crack inducing age of 28 days, the healing performance of repair mortar specimens containing SC was at least 20 pt% better than that of plain repair mortar after a healing period of 28 days.

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Section: Resultsmentioning

confidence: 99%

Section: Materials and Test Methodsmentioning

confidence: 99%

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Fundamental Properties and Self-Healing Performance of Repair Mortar with Solid Capsules Made Using Inorganic Reactive Powder

Oh¹,

Lee

Choi

et al. 2022

Materials

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“…Lee et al [25] investigated the drying shrinkage cracking of DSC and revealed the correlation between compressive strength and DS/FA. Park et al [26] evaluated the rheological properties of concrete made with DS and analyzed the plastic viscosity of concrete.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Shear Strength of Dune Sand Concrete Beams

2020

Advances in Civil Engineering

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An experimental study was performed to investigate the shear strength of concrete beams made with dune sand (DS) from the Gurbantunggut Desert in the Chinese province of Xinjiang. The test consisted of 3 series of beams which explored the shear properties of dune sand concrete (DSC) beams. The failure mode, crack pattern, load deflection, and stirrup strain were investigated. Meanwhile, the effect of shear span-to-depth ratio (a/d), stirrup ratio, and dune sand replacement ratio on the shear strength of DSC beams was discussed. The results showed that the dune sand replacement ratio had insignificant influence on the failure mode of beams, so it was feasible to use DS to fabricate beams in regions of Xinjiang in China. Furthermore, the measured shear strengths of the DSC beams were compared with the calculated values of current design codes, and the results indicated that the shear strength of DSC beams was not precisely predicted by current design codes. Therefore, a modified formula was proposed to calculate the shear strength of DSC beams.

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“…On the other hand, concrete produced with desert sand as fine aggregate in various parts of the world has various limitations in terms of strength and durability (Al-Harthy et al, 2007;Dong et al, 2016;Park et al, 2018). Due to its finer particle size distribution and impurities, many times concrete produced with desert sand as fine aggregate does not yield the desired results in a fresh and hardened state.…”

Section: Introductionmentioning

confidence: 99%

Lightweight aggregate concrete produced with crushed stone sand as fine aggregate

et al. 2020

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Lightweight aggregate concrete mixtures incorporating 0, 10, 20, and 30 weight percent replacement of normal-weight aggregate with lightweight aggregate and crushed stone as fine aggregate were tested at 7, 28, 56, and 90 days for various strength and durability characteristics of hardened concrete. Test results indicated that compressive, flexural, and split tensile strengths and static modulus of elasticity of concrete mixtures reduced with an increase in the percent replacement of normal-weight aggregate with lightweight aggregate. Furthermore, the volume of permeable voids and hence moisture sorption in lightweight aggregate concrete reduced as the lightweight aggregate content was increased pointing at the enhanced durability of the lightweight aggregate concrete mixtures. A significant reduction in dry density of hardened concrete was recorded due to the inclusion of lightweight aggregate in concrete mixtures. Considering the strength and reduction in dry mass, 20 wt.% replacement of normal-weight aggregate with lightweight aggregate is considered to be an optimum level. Reduced density of lightweight aggregate concrete mixtures is viewed as a major source of economical design of structural members as the lower concrete density will result into a reduction of self-weight of the structural members, which will allow the economical structural design of such members with smaller cross-sections. Test results of this work also showed the viability of 100% replacement of desert sand with Roz-Ud-Din Nassar

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Rheological properties of concrete using dune sand

Cited by 23 publications

References 18 publications

Fundamental Properties and Self-Healing Performance of Repair Mortar with Solid Capsules Made Using Inorganic Reactive Powder

Fundamental Properties and Self-Healing Performance of Repair Mortar with Solid Capsules Made Using Inorganic Reactive Powder

Experimental Study on the Shear Strength of Dune Sand Concrete Beams

Lightweight aggregate concrete produced with crushed stone sand as fine aggregate

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