Effect of nano calcium carbonate on hydration characteristics and microstructure of cement-based materials: A review

Fu, Qiang; Zhang, Zhaorui; Zhao, Xu; Xu, Wenrui; Niu, Ditao

doi:10.1016/j.jobe.2022.104220

Cited by 45 publications

(23 citation statements)

References 107 publications

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“…This decreases the induction period of hydration and as a result accelerate the heat of hydration. These, in turn, shift the cement hydration peak towards lower hydration time indicating acceleration of hydration (Fig17) [52].…”

Section: Effect Of Nano-caco3 (Nc)mentioning

confidence: 99%

“…Due to nucleation effect, NC particles disturb the siliconrich layer on the surface of cement particles and weaken the silicon-rich layer and NC particles interaction. NC can also act as a nucleation site outside the silicon-rich layer, resulting in acceleration of cement hydration by shortening the induction period of cement hydration [52]. High surface energy of NC promote adsorption of Ca 2+ dissolved in the solution and accelerate ion migration.…”

Section: Effect Of Nano-caco3 (Nc)mentioning

confidence: 99%

“…Figure 17. Hydration of cement in presence of NC [52] It gradually reduces setting times and the workability. It increases the flexural, splitting, compressive, and bond strength and at the same time reduces chloride penetration, water sorptivity and acid attack [51].…”

Section: Effect Of Nano-caco3 (Nc)mentioning

confidence: 99%

See 2 more Smart Citations

Effect of Nanomaterials on the Properties of Binding Materials in the Construction Industry

Singh

2023

Emerging Nanomaterials and Their Impact on Society in the 21st Century

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The construction industry uses a lot of binding materials. One of the most important binders is cement and concrete. Most used cement in concrete is Portland cement (OPC). Its manufacture consumes lot of raw materials and energy and emits huge amounts of hazardous gases particularly CO2 into the atmosphere. Attempts are being made to overcome the above problems by using blended cements, geopolymer and LC3 cements. However, there are a number of limitations in using alternatives to OPC. In recent years researches are being carried out to use nanomaterials such as nano silica, nano titanium oxide, nano alumina, nano CaCO3, nano clay, nano carbons, etc. in cement and concrete to improve the properties. The basic objectives of using nanomaterials in binding materials are to increase mechanical properties and durability. Nanomaterials, if added in appropriate amounts, accelerate the hydration, increase mechanical properties and decrease the porosity. In addition to improving physical properties, nanomaterials particularly nano TiO2 acts as a cleaning agent. Nano embedded phase change materials perform better. Since it is a new field, little work has been done so far. In the present chapter the effect of different nanomaterials on the properties of OPC, concrete, geopolymer cement and LC3 cement have been discussed at length.

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Section: Effect Of Nano-caco3 (Nc)mentioning

confidence: 99%

Section: Effect Of Nano-caco3 (Nc)mentioning

confidence: 99%

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Effect of Nanomaterials on the Properties of Binding Materials in the Construction Industry

Singh

2023

Emerging Nanomaterials and Their Impact on Society in the 21st Century

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“…The emergence of nanomaterials provides infinite possibilities for optimizing the structure of cement-based materials at the microscopic scale to improve their performance . At present, nanomaterials commonly used to optimize the properties of cement-based materials mainly include nano-silica, nano-calcium carbonate, nano-titanium dioxide, nano-iron oxide, carbon nanotubes, and graphene oxide. − However, different nanomaterials have obvious shortcomings. For example, nano-silica, nano-calcium carbonate, nano-titanium dioxide, nano-iron oxide, and other similar zero-dimensional materials, they have high activity and they can react with Ca(OH) 2 to form a stable C–S–H gel, but they lack the ability to inhibit crack propagation, and cannot provide sufficient nucleation sites for the growth of cement hydration products owing to their smaller surface area; , as one-dimensional materials, carbon nanotubes have an obvious crack-bridging effect, which can inhibit the crack propagation inside the cement-based composite materials.…”

Section: Introductionmentioning

confidence: 99%

Catalysis and Regulation of Graphene Oxide on Hydration Properties and Microstructure of Cement-Based Materials

Chen

Xue

et al. 2023

ACS Sustainable Chem. Eng.

Self Cite

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Graphene oxide (GO) is a two-dimensional material that adds functionalized oxygen-containing groups on the surface of graphene through strong acid oxidation. The oxygen-containing functional groups on the surface make GO have good dispersion and surface activity. When GO is incorporated into cement-based materials, while providing nucleation sites for cement hydration, it can also react with ions released by cement hydration. Therefore, GO has a catalytic effect on the hydration process of cement and plays a role in regulating the morphology of the hydration products, which in turn affects the formation of the microstructure of cementbased materials. In this study, the catalytic and regulatory effects of GO on the hydration characteristics, pore structure, and internal interface of cement-based materials are reviewed. The analysis shows that the oxygen-containing functional groups on the surface of GO can absorb a large number of water molecules, promote the dissolution of cement particles in water, and adsorb the Ca 2+ released by cement particles, thereby reducing the concentration of Ca 2+ around the cement particles and shortening the induction period of cement hydration. In addition, GO can provide more nucleation sites for cement hydration and shorten the hydration acceleration period. GO promotes the formation of hydration products through the nucleation effect and gradually transforms needle-like and rod-like hydration products into flower-like or polyhedral-like crystals. In addition, GO optimizes the pore structure of cement-based materials when it affects cement hydration and the morphology of hydration products through the above-mentioned effects. In addition, it makes the connection between hydration products closer through the bridging effect, so that the total porosity of cement-based materials decreases, gel-pore content increases, capillary-pore content decreases, and pore structure is significantly optimized. Finally, while optimizing the pore structure of cement-based materials, GO has an obvious optimization effect on the interface transition zone (ITZ) of cement-based materials, which significantly reduces the ITZ width and increases the ITZ density.

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“…Ash, similar to slag, is also an effective additive in concrete, used as a replacement for a part of cement, or in the form of a nanomodifying additive, improving the compressive and flexural strength, plasticity, and deformation characteristics [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ] of cement compositions, which, in microstructural studies, present a denser gel matrix and a stronger bond in the interfacial transition zone [ 13 ]. It should be noted that the maximum effects from the use of fly ash in various types of concrete are possible, including its use together with other additives, such as microsilica [ 15 , 19 ], nanosilica [ 12 , 13 , 18 , 19 ], calcium nano-carbonate [ 12 , 14 , 20 , 21 ], crumb rubber [ 15 , 18 ], and C-S-H nanoparticles [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Cement Gel Formation Process during the Creation of Nanomodified High-Performance Concrete Based on Nanosilica

Beskopylny

Stel’makh

Shcherban’

et al. 2022

Gels

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One of the most science-intensive and developing areas is nano-modified concrete. Its characteristics of high-strength, high density, and improved structure, which is not only important at the stage of monitoring their performance, but also at the manufacturing stage, characterize high-performance concrete. The aim of this study is to obtain new theoretical knowledge and experimental-applied dependencies arising from the “composition–microstructure–properties” ratio of high-strength concretes with a nano-modifying additive of the most effective type. The methods of laser granulometry and electron microscopy are applied. The existing concepts from the point of view of theory and practice about the processes of cement gel formation during the creation of nano-modified high-strength concretes with nano-modifying additives are developed. The most rational mode of the nano-modification of high-strength concretes is substantiated as follows: microsilica ground to nanosilica within 12 h. A complex nano-modifier containing nanosilica, superplasticizer, hyperplasticizer, and sodium sulfate was developed. The most effective combination of the four considered factors are: the content of nanosilica is 4% by weight of cement; the content of the superplasticizer additive is 1.4% by weight of cement; the content of the hyperplasticizer additive is 3% by weight of cement; and the water–cement ratio—0.33. The maximum difference of the strength characteristics in comparison with other combinations ranged from 45% to 57%.

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Effect of nano calcium carbonate on hydration characteristics and microstructure of cement-based materials: A review

Cited by 45 publications

References 107 publications

Effect of Nanomaterials on the Properties of Binding Materials in the Construction Industry

Effect of Nanomaterials on the Properties of Binding Materials in the Construction Industry

Catalysis and Regulation of Graphene Oxide on Hydration Properties and Microstructure of Cement-Based Materials

A Study on the Cement Gel Formation Process during the Creation of Nanomodified High-Performance Concrete Based on Nanosilica

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