Compressive Strength Evaluation of Ordinary Portland Cement Mortar Blended with Hydrogen Nano-Bubble Water and Graphene

Kim, Young‐Ho; Park, Yoonsuk; Bae, Sa-Rang; Kim, Soo Young; Han, Jung-Geun

doi:10.1166/jnn.2020.17287

Cited by 10 publications

(9 citation statements)

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“…In other research, Kim et al declared that using water containing hydrogen micro‐nano bubbles results in increasing the compressive strength of cement mortar, which this increasing rate is reduced by rising the curing age 11 . Although in their experiments Petro cock ash was used instead of cement, it can be found from the results that utilizing micro‐nano bubble of air in contact with Portland cement type II has similar behavior in increasing the compressive strength with when the micro‐nano bubble of hydrogen and Petro cock ash are used.…”

Section: Resultsmentioning

confidence: 98%

“…Furthermore, Asadollahfardi et al reported that replacing 100% of drinking water by combination of micro‐nano bubbles water and superplasticizer rises the compressive strength, tensile strength, concrete resistivity, and water absorption of concrete specimens at the age of 28 days amounting around 13, 20, 165, and 67%, respectively 14 . According to the previous studies, 7–14 the micro‐nano bubble has the potential to use as a nano‐additive with or without other admixtures. However, studies on the micro‐nano bubbles were limited to the conventional concrete and its effect on the high strength concrete has not been reported in the articles until now.…”

Section: Introductionmentioning

confidence: 98%

“…They also declared that using the micro‐nano bubble in concrete reduces the slump while rising the compressive strength significantly amounting approximately 19% at the age of 28 days 10 . Moreover, Kim et al 11 also found that utilizing water containing hydrogen nanobubble and petroleum coke ash in producing mortar samples leads to increase of compressive strength. Khoshroo et al studied the properties of concrete made with zeolite and chekneh pozzolans and micro‐nano bubble water, which they considered poly‐carboxylic superplasticizer (with a density of 1.08 g/cm 3 and weight percentage of 0.5–1.6% of cement materials) additive in all the mix designs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of water to cement ratio and age on the mechanical properties of cement mortar and concrete made of micro‐nano bubbles without adding any admixtures

Hassani

Torki

Asadollahfardi

et al. 2019

Structural Concrete

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The effect of using water containing micro‐nano bubbles (WMNB) without adding any admixtures and normal water (NW) on the mechanical properties of cement mortar and concrete samples were investigated. Four various water to cement ratios equal to 0.6, 0.5, 0.4, and 0.35 (ranging from conventional concrete to high strength concrete), and three different curing ages of 7, 28, and 90 days were considered. The experimental results showed that the initial and final setting time of cement paste, the flow of hydraulic cement mortar and the slump of concrete samples made with WMNB were lower than that of made with NW. However, the compressive strength of cement mortar in using WMNB indicated an increase up to 16 and 7% in at 7 and 28 days, respectively. We also concluded that the optimum percentage of water to cement ratio was 0.35, which in that ratio the compressive strength enhancement of concrete made of WMNB reached the peak of 6, 18.3, and 16.3% at 7, 28, and 90 days age, respectively. Whereas increasing water to cement ratio, resulted in reducing the compressive strength of concrete. Besides, the high‐resolution scanning electron microscopy images with Energy Dispersive X‐Ray analysis were briefly conducted to explore the morphological change.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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The effect of water to cement ratio and age on the mechanical properties of cement mortar and concrete made of micro‐nano bubbles without adding any admixtures

Hassani

Torki

Asadollahfardi

et al. 2019

Structural Concrete

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show abstract

“…It is known that the concrete prepared using micro-nano air bubbles (MNAB) water is characterized by greater workability [17], increased heat of hydration [25] and accelerated binding time [26]. Kim et al [27] observed 31% increase in the compressive strength of mortars prepared using Portland cement and hydrogen micro-nano bubble water as mixing water. The studies performed by Asadollahfardi et al [28] indicated that the compressive strength of concrete increased by 13.2%, and the tensile strength improved by 16.4, in relation with the control sample, following substitution of ordinary mixing water with MNAB water.…”

Section: Introductionmentioning

confidence: 99%

Physical Properties and Durability of Lime-Cement Mortars Prepared with Water Containing Micro-Nano Bubbles of Various Gases

et al. 2021

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The paper presents the experimental studies on the effect of the water containing micro-nano bubbles of various gases on the physico-mechanical properties of lime-cement mortars. In total, 7 types of mortars were prepared: with water containing the micro-nano bubbles of O2, O3 or CO2 as 50% or 100% substitute of ordinary mixing water (tap water) and the reference mortar prepared using tap water. In order to determine the influence of water with micro-nano bubbles of gases, the consistency of fresh mortar and the physical properties of hardened mortar, i.e., specific and apparent density, total porosity, water absorption by weight and capillary absorption, were established. The mechanical strength of the considered mortars was studied as well by conducting the tests for flexural and compressive strengths following 14, 28 and 56 days. Reduced workability and capillary absorption were observed in the modified mortars within the range of 0.9–8.5%. The mortars indicated an increase in the flexural strength after 28 days ranging from 3.4% to 23.5% and improved compressive strength in 1.2–31%, in comparison to the reference mortar. The conducted studies indicated increased flexural and compressive strengths along with the share of micro-nano bubbles of gases in the mixing water.

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“…Recently, numerous studies have focused on improving the properties of concrete by applying nanotechnology to architectural structures [ 7 , 8 ]. Kim et al improved the compressive strength of cement mortar specimens using functionalized graphene oxide and hydrogen nanobubble water (HNBW) [ 9 ]. Zadeh et al studied the mechanical strength and durability of concrete applied with zeolite (aggregate), meta-kaolin (pozzolan), and micro-nano bubble water (mixed water) [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Strength and Hydration Characteristics of Cement Mixture with Highly Concentrated Hydrogen Nanobubble Water

et al. 2021

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In this study, highly concentrated hydrogen nanobubble water was utilized as the blending water for cement mortar to improve its compressive and flexural strengths. Highly concentrated nanobubbles can be obtained through osmosis. This concentration was maintained by sustaining the osmotic time. The mortar specimens were cured for 28 days, in which the nanobubble concentration was increased. This improved their flexural strength by 2.25–13.48% and compressive strength by 6.41–11.22%, as compared to those afforded by plain water. The nanobubbles were densified at high concentrations, which caused a decrease in their diameter. This increased the probability of collisions with the cement particles and accelerated the hydration and pozzolanic reactions, which facilitated an increase in the strength of cement. Thermogravimetric analysis and scanning electron microscopy were used to confirm the development of calcium silicate hydrate (C-S-H) and hydration products with an increase in the nanobubble concentration. Quantitative analysis of the hydration products and the degree of hydration were calculated by mineralogical analysis.

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Compressive Strength Evaluation of Ordinary Portland Cement Mortar Blended with Hydrogen Nano-Bubble Water and Graphene

Cited by 10 publications

References 0 publications

The effect of water to cement ratio and age on the mechanical properties of cement mortar and concrete made of micro‐nano bubbles without adding any admixtures

The effect of water to cement ratio and age on the mechanical properties of cement mortar and concrete made of micro‐nano bubbles without adding any admixtures

Physical Properties and Durability of Lime-Cement Mortars Prepared with Water Containing Micro-Nano Bubbles of Various Gases

Mechanical Strength and Hydration Characteristics of Cement Mixture with Highly Concentrated Hydrogen Nanobubble Water

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