Compressive Strength Development of High-Volume Fly Ash Ultra-High-Performance Concrete under Heat Curing Condition with Time

Dong, Pham Sy; Tuấn, Nguyễn Văn; Thanh, Le Trung; Thang, Nguyen Cong; Cu, Viet Hung; Mun, Ju–Hyun

doi:10.3390/app10207107

Cited by 22 publications

(7 citation statements)

References 17 publications

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“…The second is the reduction in CO 2 emissions when making concrete to build civil infrastructure (bridges, houses, dams, hospitals, roads) by reducing the amount of Portland cement per cubic meter of concrete. The decrease is proportional to the amount in which the Pozzolanic material replaces Portland cement, so that the more volume of Portland cement is replaced, the greater the impact on the environment will be, in accordance with the findings of Dong et al: when 50% of the cement content was replaced by FA, the embodied CO 2 emissions for the UHPC mixture were reduced by approximately 50% as compared to the CO 2 emissions calculated from conventional normal-strength concrete [42]. The third is the impact on the culture of recycling waste materials.…”

Section: Introductionsupporting

confidence: 86%

Physical, Mechanical and Durability Properties of Ecofriendly Ternary Concrete Made with Sugar Cane Bagasse Ash and Silica Fume

et al. 2021

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In the present investigation, the physical, mechanical and durability properties of six concrete mixtures were evaluated, one of conventional concrete (CC) with 100% Portland cement (PC) and five mixtures of Ecofriendly Ternary Concrete (ETC) made with partial replacement of Portland Cement by combinations of sugar cane bagasse ash (SCBA) and silica fume (SF) at percentages of 10, 20, 30, 40 and 50%. The physical properties of slump, temperature, and unit weight were determined, as well as compressive strength, rebound number, and electrical resistivity as a durability parameter. All tests were carried out according to the ASTM and ONNCCE standards. The obtained results show that the physical properties of ETC concretes are very similar to those of conventional concrete, complying with the corresponding regulations. Compressive strength results of all ETC mixtures showed favorable performances, increasing with aging, presenting values similar to CC at 90 days and greater values at 180 days in the ETC-20 and ETC-30 mixtures. Electrical resistivity results indicated that the five ETC mixtures performed better than conventional concrete throughout the entire monitoring period, increasing in durability almost proportionally to the percentage of substitution of Portland cement by the SCBA–SF combination; the ETC mixture made with 40% replacement had the highest resistivity value, which represents the longest durability. The present electrical resistivity indicates that the durability of the five ETC concretes was greater than conventional concrete. The results show that it is feasible to use ETC, because it meets the standards of quality, mechanical resistance and durability, and offers a very significant and beneficial contribution to the environment due to the use of agro-industrial and industrial waste as partial substitutes up to 50% of CPC, which contributes to reduction in CO2 emissions due to the production of Portland cement, responsible for 8% of total emissions worldwide.

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Section: Introductionsupporting

confidence: 86%

Physical, Mechanical and Durability Properties of Ecofriendly Ternary Concrete Made with Sugar Cane Bagasse Ash and Silica Fume

et al. 2021

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“…The strength of the sample decreased after soaking in sulphate, salt water, and water, according to the results of the investigation [21,22]. This is owing to the solutions' ability to permeate the concrete and consequently alter its characteristics.…”

Section: Durability Of Gpcmentioning

confidence: 94%

“…This may be the result of misconduct during the casting process, particularly during oven heating. The heating time may be too long, causing some materials in the GP concrete samples to get charred or lose efficacy due to the high temperature [10,21,22]. Using a compressive strength testing machine, the experiment was continued by determining the concrete's strength.…”

Section: Durability Of Gpcmentioning

confidence: 99%

Durability Performance of Geopolymer Concrete of Various Strength

Meechang

Muthuramalingam

Tam

2023

Civil Sustain. Urban Eng.

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Geopolymers, primarily composed of fly ash, have proved an excellent substitute for ordinary portland cement (OPC) in terms of sustainability and productivity. In order to determine the geopolymer concrete's (GPC) resistance to chemical assaults and water permeability, it is necessary to obtain geopolymer concrete (GPC) of varying strengths after normal curing. The objectives of the research was to test the durability performances of the GPC of various strength under normal curing and investigating the optimum strength based on durability testing of the GPC. For this research, different type of cement-to-fly ash ratio was used for various strength data. The appropriate mixture was conducted by using the trial mix method in order to obtain better accuracy of the results data during the mixing design process. To satisfy the varied strength designs, a small proportion of OPC is added to the GPC mixture as part of the mix design. After 28 days of curing, this durability testing is undertaken after the concrete has reached its maximum strength. The compressive strength test and weights were performed and compared to the GPC mix design at 60 °C after heat curing. The 8% OPC replacement has greater resistance to sulfate attack, saltwater exposure, and water permeability compared to the 6% and 7% OPC alternatives. Consequently, the experiment reveals that the GPC's durability and strength increase as the percentage of OPC increases.

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“…FA is produced from the by‐products of coal burning in power plants 35 . Several studies have used FA as SMCs to produce UHPC as an effective pozzolanic material and filler at the same time 31,36 . FA is an effective industrial waste used to advance the properties of concrete at the lowest cost, and there are many studies that use ash for these purposes.…”

Section: Introductionmentioning

confidence: 99%

Effect of modified nano‐titanium and fly ash on ultra‐high‐performance concrete properties

Ghanim

Amin

Zeyad

et al. 2023

Structural Concrete

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This paper aims to study the effect of using modified nano‐TiO2 with fly ash (FA) on ultra‐high performance concrete's (UHPC) mechanical, transport, and microstructure properties (UHPC). A ball mill was used to disband the nano‐TiO2 and distribute it uniformly within the FA powder. In this research, 20% of the cement weight was replaced by FA, and nano‐TiO2 was added by 0.4%, 0.8%, 1.2%, 1.6%, and 2% of the FA weight. To investigate the effect of the ball mill period on the UHPC properties, periods of 10, 20, 30, and 40 min were applied to a binder of 20% FA and with 6% nano‐TiO2. In addition, a 30‐min ball mill period on a binder of 20% FA and 0.4%, 0.8%, 1.2%, 1.6%, and 2% nano‐TiO2 was also investigated. Tests of compressive strength after 1, 7, 28, and 91 days of curing in tap water, splitting tensile strength, flexural strength, and modulus of elasticity were performed after 28 days of curing in tap water. Tests of chloride permeability, sorptivity coefficient, water permeability, and microstructure were also performed after 28 days of curing in tap water. The results showed that the addition of higher percentages of nano‐TiO2 led to a decrease in workability. The addition of nano‐TiO2 improved the mechanical properties. The highest compressive strength of 208.9 MPa was achieved for the mixture of 20% FA with 1.2% nano‐TiO2 at the age of 28 days. The 30‐min period of application of the ball mill achieved the best performance compared with the other periods. The results of using a ball‐mill to re‐mix nano‐TiO2 between 1.2% and 2% by weight with FA showed impressive comparative results.

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Compressive Strength Development of High-Volume Fly Ash Ultra-High-Performance Concrete under Heat Curing Condition with Time

Cited by 22 publications

References 17 publications

Physical, Mechanical and Durability Properties of Ecofriendly Ternary Concrete Made with Sugar Cane Bagasse Ash and Silica Fume

Physical, Mechanical and Durability Properties of Ecofriendly Ternary Concrete Made with Sugar Cane Bagasse Ash and Silica Fume

Durability Performance of Geopolymer Concrete of Various Strength

Effect of modified nano‐titanium and fly ash on ultra‐high‐performance concrete properties

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