Efficiency Comparison of Conventional and Unconventional Curing Methods in Concrete

Khaliq, Wasim; Javaid, Waqas

doi:10.14359/51689564

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…The reduction in the ratio reflected more consumption of the CH and more formulation of the C-S-H in the presence of carbon dust. Furthermore, the lower ratio of CaO/SiO 2 indicated the suitable quantities of C3S and C2S in the microstructure, thus improved strength development [22]. This result explains the enhancement in the compressive strength of the mortar with 5% and 10% replacement ratio compared to the control specimen.…”

Section: Chemical Composition Of Cement Mortarmentioning

confidence: 81%

“…In addition, the ettringite needles are revealed to be in abundance. The well-formed ettringite crystals signal toward the healthy mix of cement mortar [ 22 ].…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the ettringite needles are revealed to be in abundance. The well-formed ettringite crystals signal toward the healthy mix of cement mortar [22]. Figure 6c shows the microstructure of cement mortar specimen with high replacement ratio of carbon dust (40%).…”

Section: Microstructure Of Cement Mortarmentioning

confidence: 99%

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Industrial Waste Utilization of Carbon Dust in Sustainable Cementitious Composites Production

Irshidat

Al‐Nuaimi

2020

Materials

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This paper experimentally investigates the effect of utilization of carbon dust generated as an industrial waste from aluminum factories in cementitious composites production. Carbon dust is collected, characterized, and then used to partially replace cement particles in cement mortar production. The effect of adding different dosages of carbon dust in the range of 5% to 40% by weight of cement on compressive strength, microstructure, and chemical composition of cement mortar is investigated. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray fluorescence (XRF) analysis are used to justify the results. Experimental results show that incorporation of carbon dust in cement mortar production not only reduces its environmental side effects but also enhances the strength of cementitious composites. Up to 10% carbon dust by weight of cement can be added to the mixture without adversely affecting the strength of the mortar. Any further addition of carbon dust would decrease the strength. Best enhancement in compressive strength (27%) is achieved in the case of using 5% replacement ratio. SEM images show that incorporation of small amount of carbon dust (less than 10%) lead to produce denser and more compact-structure cement mortar.

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Section: Chemical Composition Of Cement Mortarmentioning

confidence: 81%

“…In addition, the ettringite needles are revealed to be in abundance. The well-formed ettringite crystals signal toward the healthy mix of cement mortar [ 22 ].…”

Section: Resultsmentioning

confidence: 99%

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Industrial Waste Utilization of Carbon Dust in Sustainable Cementitious Composites Production

Irshidat

Al‐Nuaimi

2020

Materials

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“…Simultaneously, sulfate calcium silicate gel begins to form, which whittles down the main strength phase and gradually form cracks in the specimen. In each curing methods’ group of specimens, the change range and rate of the strength of PC are the most obvious, indicating that PC is internally looser, possesses wider gaps and can be easily corroded or damaged [ 30 , 31 , 32 , 33 , 34 ]. Comparatively to PC, the strength of M10 increased and decreased to a lesser extent, which can be ascribed to the denser structure, more complete hydration, and higher sulfate resistance.…”

Section: Resultsmentioning

confidence: 99%

Investigating the Mechanical Properties and Durability of Metakaolin-Incorporated Mortar by Different Curing Methods

Dong

Pei

et al. 2022

Materials

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In this paper, the traditional, silicate-based Portland cement (PC) was employed as the control to explore the impact of adding varying amounts of metakaolin (MK) on the mechanical properties of cement mortar. In fact, as a mineral admixture, metakaolin (MK) has the ability to significantly improve the early strength and sulfate resistance of cement mortar in traditional, silicate-based Portland cement (PC). In addition to this, the performance of Portland cement mortar is greatly affected by the curing mode. The previous research mainly stays in the intermittent curing and alkaline excitation mode, and there are few studies on the influence of relatively humidity on it. Moreover, the paper investigated the impact of four different curing methods about humidity on the mechanical properties and sulfate resistance. The results show that the best content of metakaolin in Portland cement is 10% (M10), and the best curing method is 95% humidity in the first three days followed by 60% humidity in the later period (3#). Based on previous literature that suggests that adding MK thickens water film layer on the surface of mortar, the mechanism of MK increasing the early strength of cement was analyzed. The compressive strength of the Portland cement containing 10% MK (M10) after 1 day curing is 3.18 times that of pristine PC mortar, and is comparable if PC is cured for three days under the same curing conditions. The traditional PC mortar is highly dependent on the wet curing time, and normally requires a curing time of at least seven days. However, the incorporation of MK can greatly reduce the sensitivity of Portland cement to water; MK cement mortar with only three days wet curing (3#M10) can reach 49.12 MPa after 28 days, which can greatly shorten the otherwise lengthy wet curing time. Lastly, the cement specimens with MK also demonstrated excellent resistance against sulfate corrosion. The work will provide a strong theoretical basis for the early demolding of cement products in construction projects. At the same time, this study can also provide a theoretical reference for the construction of climate drought and saline land areas, which has great reference value.

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“…Moist cured blast furnace slag cement concrete exhibited a greater increase in the pulse velocity than similarly cured OPC concrete. Wang and Black [6] reported that the curing efficiency index (CEI) correlated well with the capability of the curing membranes in retaining moisture within concrete. Experiments conducted by Grafe and Grube [7] on the influence of curing on the gas permeability of concrete prepared with different types of cement indicated that GGBFS and PFA cement concrete had greater permeability than OPC concrete, when specimens were cured only for 1 day.…”

Section: IImentioning

confidence: 99%

Effect of Curing Methods on Strength and Elastic Properties of Concrete

Kulkarni¹

2018

IJRASET

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This paper reports the results of a research study conducted to evaluate the effect of curing methods on the mechanical properties of ordinary Portland cement (OPC) With Fly ash as cementitious material with 30% replacement to cement. Concrete Cube specimens were prepared and cured by different curing methods. These methods included without curing, Ponding, Gunny bags, Curing Compounds. The curing membrane was applied immediately after demoulding or after an initial period of drying. The effect of the selected curing regime on the properties of OPC was evaluated by measuring compressive strength, and also checking the quality of concrete with the pulse velocity instrument. The strength and durability characteristics of both OPC concrete specimens cured by applying the selected curing compounds were similar or better than that of concrete specimens cured by other methods. There was no significant change in strength noted due to the curing methodology. Shrinkage of Concrete cylinders was also measured along with quality of concrete by Ultrasonic Pulse Velocity Test.

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Efficiency Comparison of Conventional and Unconventional Curing Methods in Concrete

Cited by 6 publications

References 9 publications

Industrial Waste Utilization of Carbon Dust in Sustainable Cementitious Composites Production

Industrial Waste Utilization of Carbon Dust in Sustainable Cementitious Composites Production

Investigating the Mechanical Properties and Durability of Metakaolin-Incorporated Mortar by Different Curing Methods

Effect of Curing Methods on Strength and Elastic Properties of Concrete

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