Carbonation curing of cement mortars incorporating carbonated fly ash for performance improvement and CO2 sequestration

Chen, Tiefeng; Bai, Mengjie; Gao, Xiaojian

doi:10.1016/j.jcou.2021.101633

Cited by 102 publications

(19 citation statements)

References 51 publications

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“…From the experimental results, it was found that the carbonation increases with the addition of FAs and SLA up to 6 months of exposure in coastal conditions (Table 6); the increase in carbonation depth in these mixes may be due to their high porosity compared to OPC mortar; this is attributed to the higher water contents in composites (Hsu et al, 2019) to maintain their workability (Table 4), while the partial substitution of cement by fine-grained additives simultaneously reduces the cement content in the mortars resulting the delay of the hydration process. According to the published materials, there exist few literatures that report the effect of fly ash addition on carbonation process (Qin et al, 2019), (Chen et al, 2021), (Czarnecki et al, 2018); these articles conclude that due to replacement of cement with fly ash, the rate of carbonation increases significantly. At the same time, the incorporation of fly ash leads to increased permeability of the hardened cement mortars at early ages; the latter affects effects on the resistance of mortar against carbonation and the diffusivity of CO2.…”

Section: Resultsmentioning

confidence: 99%

Influence of Different Waste Materials on Resistance of Cement Mortars against Carbonation and Chloride Ingress

Chousidis

Batis

2021

sace

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This work is an extensive experimental study on the corrosion behavior of reinforced cementitious mortars containing industrial byproducts and waste materials. In particular, calcareous (C-class) fly ashes, iron mill scale and Electrolytic Manganese Dioxide (E.M.D.) waste were used as additives in mortars production. The abovementioned materials were used without any prior treatment or management and replaced the cement in concrete mixing by 10% wt. of cement weight. For the experimental set-up, reinforced mortars were prepared and exposed to coastal area for 12 months, while some of them were remained in a salt spray cabin for 60 days. The corrosion monitoring was performed by electrochemical and mass loss measurements, while chloride content, porosity, carbonation and mineralogy of mortars were also estimated. The results indicate, that there is a development in durability and chloride penetration resistance of composites comparing with the conventional mortars at late ages. At the same time, it was also observed that their chemical composition and fineness, control the diffusion of CO2 into the pore system and lead to increased carbonation of composite mortars. The challenge of this work is the production of eco-friendly composites with high chloride and carbon dioxide penetration resistance.

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Section: Resultsmentioning

confidence: 99%

Influence of Different Waste Materials on Resistance of Cement Mortars against Carbonation and Chloride Ingress

Chousidis

Batis

2021

sace

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“…Figure 9 shows the XRD patterns of the C3 cement slurry system after curing for 7 days at different temperatures (50, 300, 400, 500, and 600 °C) in a CO 2 atmosphere. Figure 9 shows that the main phases of C3 cement cured at 50 °C are CH, SiO 2 , C-S-H and CaCO 3 (Chen et al, 2021;Chen et al, 2022). A large amount of SiO 2 is contained in the cement owning to the addition of quartz sand to C3.…”

Section: Phase Compositionmentioning

confidence: 99%

Effect of CO2 on the Hydration of Aluminate Cement Under Conditions of Burning Reservoir in Heavy Oil Thermal Recovery

Wu¹,

Wu²,

Xing³

et al. 2022

Front. Mater.

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Under conditions of heavy oil thermal recovery, cement sheaths often suffer high-temperature performance degradation and CO2 corrosion. The performance of Class G oil well cement commonly used for cementing, deteriorates significantly at high temperatures and in CO2 environments, which can easily cause accidents. By contrast aluminate cement (CAC), at the same time, has good high-temperature resistance and corrosion resistance. Therefore, this study explored the mechanical properties and permeability of CAC with a high-temperature stabiliser cement slurry system (C1), pure CAC slurry system (C2) and Portland cement with sand cement slurry system (C3) before and after corrosion at 50, 300, 400, 500, and 600°C. The micromorphology, hydration products and pore structure of the cement paste before and after corrosion were analyzed using scanning electron microscopy, X-ray diffraction, thermogravimetry and nitrogen adsorption specific surface area and pore diameter analysis; additionally, the hydration mechanism of CAC under high temperatures and in CO2 environments was explored. The results show that the degree of degradation of the mechanical properties of C1 cement slurry system at high temperatures and under CO2 corrosive environments is significantly lower than that of the C3 cement slurry system. At a curing high temperature of 400°C, the maximum strength of the C1 cement paste reached 36.39 ± 0.37 MPa. The addition of a high-temperature stabiliser improved the mechanical properties of CAC at low temperatures, reduced the formation of C3ASH4 in the cement paste at high temperatures, and improved the strength of the cement paste after high-temperature curing. Compared with the C3 cement slurry system, the C1 cement slurry system had better high-temperature resistance and corrosion resistance and was more suitable for application under conditions of a burning reservoir in heavy oil thermal recovery.

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“…Most alkaline cementitious materials, such as Portland cement, blast furnace slag, and y ash, can absorb CO 2 , and carbonation reaction processes generally result in progressive alkali decrease or neutralization. [3][4][5][6] Carbon xation may enhance the cementitious ability when alkaline oxides, such as calcium oxide (CaO) and magnesium oxide (MgO), in building materials react with CO 2 to generate insoluble and stable carbonates. Current knowledge indicates that CO 2 treatment of cementbased materials (CBMs) at early age can not only absorb a large amount of CO 2 but also rene the microstructure and improve mechanical properties and durability performances.…”

Section: Introductionmentioning

confidence: 99%

Morphological characteristics of calcium carbonate crystallization in CO₂ pre-cured aerated concrete

Ruan

Liu

et al. 2022

RSC Adv.

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Carbonation curing of cement mortars incorporating carbonated fly ash for performance improvement and CO2 sequestration

Cited by 102 publications

References 51 publications

Influence of Different Waste Materials on Resistance of Cement Mortars against Carbonation and Chloride Ingress

Influence of Different Waste Materials on Resistance of Cement Mortars against Carbonation and Chloride Ingress

Effect of CO2 on the Hydration of Aluminate Cement Under Conditions of Burning Reservoir in Heavy Oil Thermal Recovery

Morphological characteristics of calcium carbonate crystallization in CO₂ pre-cured aerated concrete

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Carbonation curing of cement mortars incorporating carbonated fly ash for performance improvement and CO2 sequestration

Cited by 102 publications

References 51 publications

Influence of Different Waste Materials on Resistance of Cement Mortars against Carbonation and Chloride Ingress

Influence of Different Waste Materials on Resistance of Cement Mortars against Carbonation and Chloride Ingress

Effect of CO2 on the Hydration of Aluminate Cement Under Conditions of Burning Reservoir in Heavy Oil Thermal Recovery

Morphological characteristics of calcium carbonate crystallization in CO2 pre-cured aerated concrete

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Morphological characteristics of calcium carbonate crystallization in CO₂ pre-cured aerated concrete