Influences of nano-TiO2 on the properties of cement-based materials: Hydration and drying shrinkage

Zhang, Rui; Cheng, Xin; Hou, Pengkun; Ye, Zhengmao

doi:10.1016/j.conbuildmat.2015.02.003

Cited by 298 publications

(123 citation statements)

References 43 publications

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“…From the results (Tab. 2) it is shown that the addition of TiO 2 does not imply substantial differences in compressive strength results probably due to pore-refining and accelerating effect on hydration, as indicated in [17], despite other findings in literature, where it is shown that TiO 2 could decrease [18] mechanical behavior if the amount of binder decreases. Zeolite (A1) based mortars show values slightly higher (about 5%) than the reference mortar.…”

Section: Mechanical Propertiesmentioning

confidence: 79%

Innovative hydraulic lime-based finishes with unconventional aggregates and TiO₂ for the improvement of indoor air quality

et al. 2020

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This paper reports a study on 8 unconventional hydraulic lime-based mortars able to improve indoor air quality by acting as passive systems. Mortars have been prepared with commercial sand or highly adsorbent materials as aggregates with/without TiO2 as photocatalytic agent, to test also the decomposition of airborne pollutants. Mechanical properties, hygrometric behavior, inhibition of growth of molds and depollution properties have been tested. Despite using porous materials (zeolite and activated carbon), in mortars with unconventional aggregates, compressive strength is higher than in sand-based ones, with a more than double higher water vapor permeability. Zeolite-based mortars have the highest moisture buffering capacity followed by silica gel- and activated carbon-based mortars (1.5–2 times higher than reference, respectively, because of the high porosity of unconventional aggregates). Sand-based mortars show optimum inhibitory capacity against fungal growth. Concerning unconventional aggregates, silica gel mortars have good inhibitory capacity, whereas zeolite and activated carbon give to mortars an optimum substrate for molds. Mortars with unconventional aggregates as silica gel remove more than 80% of tracer pollutant after 2 h of test, whereas zeolite-based mortars remove the 65% of it after 120 min. TiO2 enhances depollution properties as photocatalytic oxidation agent when the mortar is close to saturation.

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Section: Mechanical Propertiesmentioning

confidence: 79%

Innovative hydraulic lime-based finishes with unconventional aggregates and TiO₂ for the improvement of indoor air quality

et al. 2020

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“…Fluctuation in test results by various researchers demanded more work in this direction to verify impact of non-TiO2 on cement based mixes before its real application. Zhang et al [6] used commercially available colloidal nano-TiO2 of length 25nm and 30nm with varying percentage of 0, 1, 3 and 5% to study characteristics like compressive strength development, overall hydration process and drying shrinkage of concrete. Fig.…”

Section: Titanium Dioxide Nano Particlesmentioning

confidence: 99%

Application of nanomaterials to enhance microstructure and mechanical properties of concrete

Kwalramani

Syed

2018

IJIE

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The advances of sustainable construction and the green building movement of the past decade have encouraged comprehensive assessment of building materials and construction practices worldwide. With superior fire resistance, strength, and a long service life, concrete is the most widely used construction material in the world. Considering the amount of concrete required for various construction works, enhancing sustainability to concrete, both in terms of concrete production and mix design would be a highly desirable prospect. Lately, nanotechnology is a promising field in terms of environmental improvements including energy savings and reduced reliance on non-renewable resources, as well as reduced waste, toxicity and carbon emissions. Nanotechnology allows enhancement of available concrete products by using nano-materials; these nano-materials could be in the form of nano-particles, nano-chemical additives, and nano-fibers in cement-based materials matrix. The usage of nanomaterials results in production of concrete with lower volume of cement. The influence of addition of various nano particles such as nano silica, nano Al2O3, nano TiO2, nano Fe2O3, nano clays, and highly dispersed carbon nano tubes in concrete is thoroughly investigated in present work with an initiative towards 'Green Concrete' incorporating these waste materials as one of its ingredients.

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“…Nanomaterials have attracted increasing attention for their application in cement composites due to their excellent physical and chemical properties [2]. The most commonly used nanomaterials for cement composites are nano-silicas [3], carbon nano tubes [4] and nano-TiO2 [5]. As a carbon-based nanomaterial, graphene oxide (GO) consists of several layers of wrinkled two-dimensional carbon sheet with various oxygen-containing functional groups, which is highly dispersible in water and possesses excellent mechanical properties [6,7].…”

Section: Introductionmentioning

confidence: 99%

The Role of Graphene Oxide on the Hydration Process and Chemical Shrinkage of Cement Composites

Xu¹

2020

Ceramics - Silikaty

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Graphene oxide (GO) has attracted increasing attention for its application in cementitious materials as it can be used to regulate the hydration products of cement and improve the properties of cement composites. This paper investigated the role of GO on the hydration process and chemical shrinkage of a cement paste through an experimental study and molecular dynamics simulation. The hydration heat flow of a cement composite with GO (CCG) was characterised by using an isothermal calorimeter. The chemical shrinkage of the CCG was also measured by applying a modified method based on ASTM C1608. The test results have shown that incorporating GO can mainly accelerate the hydration rate of cement composites at the early stage, but would not change the four-stage process of the cement hydration. The addition of GO by 0.3 wt% of cement is able to reduce the chemical shrinkage of the cement composites. This regulation effect is mainly attributed to the hydrogen bonding, which has been verified by the molecular dynamics simulation.

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Influences of nano-TiO2 on the properties of cement-based materials: Hydration and drying shrinkage

Cited by 298 publications

References 43 publications

Innovative hydraulic lime-based finishes with unconventional aggregates and TiO₂ for the improvement of indoor air quality

Innovative hydraulic lime-based finishes with unconventional aggregates and TiO₂ for the improvement of indoor air quality

Application of nanomaterials to enhance microstructure and mechanical properties of concrete

The Role of Graphene Oxide on the Hydration Process and Chemical Shrinkage of Cement Composites

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Influences of nano-TiO2 on the properties of cement-based materials: Hydration and drying shrinkage

Cited by 298 publications

References 43 publications

Innovative hydraulic lime-based finishes with unconventional aggregates and TiO2 for the improvement of indoor air quality

Innovative hydraulic lime-based finishes with unconventional aggregates and TiO2 for the improvement of indoor air quality

Application of nanomaterials to enhance microstructure and mechanical properties of concrete

The Role of Graphene Oxide on the Hydration Process and Chemical Shrinkage of Cement Composites

Contact Info

Product

Resources

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Innovative hydraulic lime-based finishes with unconventional aggregates and TiO₂ for the improvement of indoor air quality

Innovative hydraulic lime-based finishes with unconventional aggregates and TiO₂ for the improvement of indoor air quality