Optimization of lightweight foamed concrete using fly ash based on mechanical properties

Hashemmoniri, Seyednavid; Fatemi, Amirabbas

doi:10.1007/s41062-022-01016-2

Cited by 9 publications

(6 citation statements)

References 18 publications

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“…To mitigate the environmental impact of the construction sector, researchers have proposed a series of eco-friendly solutions. Some have suggested using additives with active volcanic ash to replace cement during concrete production to reduce cement consumption [ 7 , 8 , 9 , 10 ], whereas others suggest modifying concrete using nanomaterials to increase its durability [ 11 , 12 , 13 , 14 ]. To reduce the demand for natural aggregates and to mitigate the environmental burden, people have started to study the use of recycled aggregates, industrial waste, and mineral tailings as alternatives to natural aggregates in concrete [ 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Multi-Scale Analysis of the Damage Evolution of Coal Gangue Coarse Aggregate Concrete after Freeze–Thaw Cycle Based on CT Technology

Xin,

Yang,

Yang

et al. 2024

Materials

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This study utilized X-ray computed tomography (CT) technology to analyze the meso-structure of concrete at different replacement rates, using a coal gangue coarse aggregate, after experiencing various freeze–thaw cycles (F-Ts). A predictive model for the degradation of the elastic modulus of Coal Gangue coarse aggregate Concrete (CGC), based on mesoscopic damage, was established to provide an interpretation of the macroscopic mechanical behavior of CGC after F-Ts damage at a mesoscopic scale. It was found that after F-Ts, the compressive strength of concrete, with coal gangue replacement rates of 30%, 60%, and 100%, respectively, decreased by 33.76%, 34.89%, and 42.05% compared with unfrozen specimens. The results indicate that an increase in the coal gangue replacement rate exacerbates the degradation of concrete performance during the F-Ts process. Furthermore, the established predictive formula for elastic modulus degradation closely matches the experimental data, offering a reliable theoretical basis for the durability design of CGC in F-Ts environments.

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Section: Introductionmentioning

confidence: 99%

Multi-Scale Analysis of the Damage Evolution of Coal Gangue Coarse Aggregate Concrete after Freeze–Thaw Cycle Based on CT Technology

Xin,

Yang,

Yang

et al. 2024

Materials

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“…Unfortunately, this highly useful construction material is still burdened with negative consequences resulting from the use of cement binders for its production [8][9][10]. The basic binder in concrete is ordinary Portland cement (OPC), the production of which is unfortunately the main contributor to greenhouse gas emissions, mainly CO2, associated with global warming and climate change on Earth [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Addition of Coal Fly Ash (CFA) on the Control of Water Movement within the Structure of the Concrete

Golewski

2023

Materials

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Studies were carried out to find a relation between the important physical property, i.e., water absorption and the main mechanical parameter, i.e., compressive strength (fcm), of concretes containing coal fly ash (CFA) in the amounts of 0% (CFA-00), 20% (CFA-20%), and 30% (CFA-30). The methodology of the water absorption tests reflected the conditions prevailing in the case of reinforced concrete structures operating below the water table. The microstructure of all materials was also assessed. Based on the conducted studies, it was found that both the fcm of concretes with the addition of CFA and its water absorption depended on the percentage of waste used, whereas both analyzed parameters were closely related to the structure of the cement matrix and interfacial transition zone area between the coarse aggregates and the paste. It should be stated that at the content of 20% CFA in the binder composition, an increase in the fcm of the material is observed, with a simultaneous increase in its water absorption. On the other hand, the addition of 30% CFA results in a significant decrease in both the strength of the composite and its water absorption. Thus, it was found that in the case of concretes with the addition of CFA, the strength of the material is directly proportional to the level of its water absorption. Moreover, the concrete including 30% CFA may increase the durability of reinforced concrete structures subjected to immersion conditions. From an application point of view, the obtained research results may be helpful in understanding the impact of the CFA additive on the level of water absorption in cement concretes with this waste.

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“…Nevertheless, this highly useful construction material is still burdened with negative consequences resulting from the use of cement binder for its production [16,17]. The basic binder in concrete is ordinary Portland cement (OPC), the production of which is unfortunately the main contributor to greenhouse gas (GHG) emissions, mainly CO 2 , associated with global warming and climate change on Earth [18][19][20][21][22][23]. It is estimated that the amount of CO 2 produced during the burning of the Portland clinker, from which OPC is obtained after grinding, is from 8% to even 10% of the global annual emission of this harmful oxide [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Examination of water absorption of low volume fly ash concrete (LVFAC) under water immersion conditions

Golewski

2023

Mater. Res. Express

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The studies were carried out to find a relation between important physical property and the main mechanical parameter of concretes containing fly ash (FA) in order to develop indications for the production of durable composites with the addition of this waste. The tests included low volume fly ash concrete (LVFAC). The cements used in the studies were following: ordinary Portland cement (OPC), (FA-00) and two blended Portland cements containing FA in the amount of: 20%, (FA-20) and 30% (FA-30). Measurements of water adsorption (wa) by immersion and compressive strength (fcm) of analysed composites have been performed. The methodology of the wa tests was to reflect the conditions prevailing in the case of concrete- and reinforced concrete structures operating below the water table. The microstructure of all three materials was also assessed. Test results indicated that LVFAC mixes developed 28-day fcm between 45.10 for FA-30 to 48.96 MPa for FA-20 with a value of 47.51 MPa for the reference concrete. Neverless wa of LVFAC mixes decreased with the increase in FA content. The average values of wa was 4.6% for FA-30 and 5.3% for FA-20, respectively, while for concrete without FA it was 5.0%. Thus, it was found that wa by immersion was inversely proportional to the fcm. Based on the microstructural studies it was found that this behavior is attributed to reduced pore diameters and densification of cement matrix microstructure in FA-30 concrete. On the other hand concrete of series FA-20 showed a loose and porous microstructure, and wa in this composite increased accordingly. It can be stated that, the LVFAC containing 30% FA may increase durability of reinforced concrete structures subjected to immersion conditions.

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Optimization of lightweight foamed concrete using fly ash based on mechanical properties

Cited by 9 publications

References 18 publications

Multi-Scale Analysis of the Damage Evolution of Coal Gangue Coarse Aggregate Concrete after Freeze–Thaw Cycle Based on CT Technology

Multi-Scale Analysis of the Damage Evolution of Coal Gangue Coarse Aggregate Concrete after Freeze–Thaw Cycle Based on CT Technology

The Effect of the Addition of Coal Fly Ash (CFA) on the Control of Water Movement within the Structure of the Concrete

Examination of water absorption of low volume fly ash concrete (LVFAC) under water immersion conditions

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