Effects of Carbonation on Mechanical Properties and Durability of Concrete Using Accelerated Testing Method

Jack, Miranda; Huang, Ran; Yang, Chengxu

doi:10.51400/2709-6998.2296

Cited by 91 publications

(20 citation statements)

References 14 publications

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“…Carbonation is the common phenomenon observed in cementitious materials, and it can induce both beneficial and detrimental effects on the mechanical properties depending on specific situations. For example, carbonation can enhance the compressive strength of concretes since the resultant calcium carbonate may decrease the surface porosity . On the other hand, another report showed that the presence of sharp carbonation front is detrimental to the mechanical properties …”

Section: Resultsmentioning

confidence: 99%

“…For example, carbonation can enhance the compressive strength of concretes since the resultant calcium carbonate may decrease the surface porosity. 86 On the other hand, another report showed that the presence of sharp carbonation front is detrimental to the mechanical properties. 87 The particle size within the range of 100−500 nm is further confirmed by the monomodal, intensity-based size distribution acquired from dynamic light scattering (Figure 2a).…”

Section: Synthesis and Characterization Of Cs Submicronmentioning

confidence: 99%

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Size- and Shape-Controlled Synthesis of Calcium Silicate Particles Enables Self-Assembly and Enhanced Mechanical and Durability Properties

Shahsavari

Hwang

2018

Langmuir

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Calcium silicate (CS)-based materials are ubiquitous in diverse industries ranging from cementitious materials to bone tissue engineering and drug delivery. As a symbolic example, concrete is the most widely used synthetic material on the planet. This large consumption entails significant negative environmental footprint, which calls for innovative strategies to develop greener concrete with improved properties (to do more with less). Herein, we focus on the physicochemical properties of novel spherical calcium silicate particles with an extremely narrow size distribution and report their promising potential as fundamental building blocks. We demonstrate a scalable size- and shape-controlled synthesis protocol to yield highly spherical CS submicron particles, leading to favorable aggregation mechanisms and thus self-assembly of the bulk ensemble. This optimized kinetics-controlled synthesis is governed by suitable stoichiometric ratio of calcium over silicon, type and concentration of the surfactant, and molar ratio of the alkaline solution. Our extensive nano/micro/macro-characterization results show that the bulk ensemble exhibits many superior properties, such as improved strength, toughness, ductility, and durability, paving the path for bottom-up science-based engineering of concrete.

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis and Characterization Of Cs Submicronmentioning

confidence: 99%

Size- and Shape-Controlled Synthesis of Calcium Silicate Particles Enables Self-Assembly and Enhanced Mechanical and Durability Properties

Shahsavari

Hwang

2018

Langmuir

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“…The improvement in mechanical properties by the formation of CaCO 3 has also been observed in strengthening concrete structures. It has been reported that the carbonation of Ca(OH) 2 can slightly enhance the compressive strength and splitting strength of concrete (the maximum load that the concrete beam can bear before cracking occurs), although the formed CaCO 3 can easily cause corrosion due to the contact between CO 3 2– and water in air. , …”

Section: Discussionmentioning

confidence: 99%

“…It has been reported that the carbonation of Ca(OH) 2 can slightly enhance the compressive strength and splitting strength of concrete (the maximum load that the concrete beam can bear before cracking occurs), although the formed CaCO 3 can easily cause corrosion due to the contact between CO 3 2− and water in air. 37,38 4.2. Implications to the Practical Calcium Looping Process.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Influence of Hydration by Steam/Superheating on the CO₂ Capture Performance and Physical Properties of CaO-Based Particles

Yin

Qin

et al. 2013

Ind. Eng. Chem. Res.

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This paper studied the effect of the cyclic carbonation/calcination reactions and the hydration-based reactivation methods (i.e., hydration by steam and hydration by superheating) on the CO 2 capture performance and physical properties of pelletized CaO-based sorbent particles in a fixed bed reactor. Hydration by superheating consisted of first a steam hydration process in 15 vol % H 2 O at 300 °C and a subsequent superheating process in 100% CO 2 at 550 °C. It was found that during the successive carbonation/calcination cycles, the chemical activity of CaO sorbent particles fell rapidly while their physical properties (i.e., weight loss after rotations and compressive strength) were largely maintained. In addition, both hydration by steam and hydration by superheating were effective in reactivating the chemical activity of CaO-based pellets to nearly the same level. Hydration by steam, however, significantly weakened the physical strength of CaO-based pellets whereas hydration by superheating largely maintained their mechanical properties over 20 cycles. The positive effect of hydration by superheating was ascribed to the carbonation of Ca(OH) 2 during the superheating step at 550 °C.

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“…Carbonation is considered to be the cause most responsible for the reduction of the pH value of the pore solution of the concrete, which normally being around 12.6-13, decreases to less than 9. This fall in the value of the pH is responsible for the depassivation of the reinforcement in concrete, further exposing the rebar to potential threats of corrosion (Papadakis et al 1992;Chi et al 2002;ACI 201.2R-16;Hussain et al 2016).…”

Section: Deterioration Model -Crackingmentioning

confidence: 99%

Causes of Failures in Circular Concrete Silo Walls, Particularly Under Environmental Influences

Bilčík

Šoltész

Matiaskova³

et al. 2021

Slovak Journal of Civil Engineering

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The paper reports the results of a case study for achieving longer service life and increasing the environmental sustainability of concrete silos. Damage mechanisms in concrete silo walls, and respectively in cylindrical structures (e.g., chimneys, cooling towers, and tanks), are widely diverse. The common causes of failures include those due to poor design considerations, construction deficiencies, non-compliance with operational rules and regulations, lack of maintenance, and insufficient and/or corroded reinforcements, together with the environmental conditions affecting the walls. In addition to the ultimate limit state design, temperature-induced cracking may often be underestimated in the design of reinforced concrete silos, leading to premature deterioration and losses in serviceability. Cracks from environmental or service conditions facilitate the ingress of moisture and corrosive agents. Therefore, there is an increased interest in reducing the appearance of cracks and limiting their width. The aim of this paper is to highlight the synergistic effects in the design, construction, and operation of silo walls, particularly under varying environmental influences. The research undertaken indicates that systematic errors can be identified and corrected.

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Effects of Carbonation on Mechanical Properties and Durability of Concrete Using Accelerated Testing Method

Cited by 91 publications

References 14 publications

Size- and Shape-Controlled Synthesis of Calcium Silicate Particles Enables Self-Assembly and Enhanced Mechanical and Durability Properties

Size- and Shape-Controlled Synthesis of Calcium Silicate Particles Enables Self-Assembly and Enhanced Mechanical and Durability Properties

Influence of Hydration by Steam/Superheating on the CO₂ Capture Performance and Physical Properties of CaO-Based Particles

Causes of Failures in Circular Concrete Silo Walls, Particularly Under Environmental Influences

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Effects of Carbonation on Mechanical Properties and Durability of Concrete Using Accelerated Testing Method

Cited by 91 publications

References 14 publications

Size- and Shape-Controlled Synthesis of Calcium Silicate Particles Enables Self-Assembly and Enhanced Mechanical and Durability Properties

Size- and Shape-Controlled Synthesis of Calcium Silicate Particles Enables Self-Assembly and Enhanced Mechanical and Durability Properties

Influence of Hydration by Steam/Superheating on the CO2 Capture Performance and Physical Properties of CaO-Based Particles

Causes of Failures in Circular Concrete Silo Walls, Particularly Under Environmental Influences

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Influence of Hydration by Steam/Superheating on the CO₂ Capture Performance and Physical Properties of CaO-Based Particles