A Review: Influence of Potential Nanomaterials for Civil Engineering Projects

Firoozi, Ali Akbar; Naji, M. A.; Dithinde, M; Firoozi, Ali Asghar

doi:10.1007/s40996-020-00474-x

Cited by 12 publications

(4 citation statements)

References 38 publications

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“…Finally, a recommendation is made regarding the use of nano materials because they are susceptible to particle agglomeration, which can have adverse effects on the mechanical properties of the soil [39] - [41]. However, there are studies in which the use of nanoclays has worked to improve the geotechnical properties of soft soils with a slight presence of sand, since the addition of 2% to 4% of these nanoparticles increased the compressive strength by up to 22%, the angle of internal friction by up to 17% and a decrease in the plasticity index of up to 25% [42]; and it is even seen as a nano material with potential for use in civil engineering with the addition of polymers for the use of a lower percentage of filler in mixtures, showing benefits over fiber composites [43].…”

Section: Use Of Nanotechnology To Stabilize Soilsmentioning

confidence: 99%

Review of the use of nanomaterials in soils for construction of roads

2020

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Nano materials are becoming more and more relevant in the construction of civil works, since they can be used as additions or additives to improve and stabilize asphalt concretes, hydraulic concretes, fine soils at the level of subgrade, sub-bases, bases and even for filters in water treatment. The present article intends to collect the different experiences in the use of nano materials, in order to stabilize or improve the mechanical and geotechnical properties of soils used in road construction, especially what has to do with the manufacture of nano fibers for use in soils; finding that its use in the field of roads is to be investigated and developed with different types of solutions, as the most studied are the carbon nano fibers

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Section: Use Of Nanotechnology To Stabilize Soilsmentioning

confidence: 99%

Review of the use of nanomaterials in soils for construction of roads

2020

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“…Regarding the requirement for environmentally friendly building construction, the following are the key novelties of the agent for additives: reducing the consumption of natural resources, reducing the amount of energy used, reducing greenhouse gas emissions, and restraining pollution of the earth, air, and water [11]. New substances known as nanomaterials have at least one spatial dimension that is less than 100 nanometers.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Clay Compressibility and Strength Using Nano Magnesium Oxide

Sadiq,

Fattah,

Aswad

2023

E3S Web Conf.

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In order to satisfy the requirements of environmentally friendly construction projects and minimize greenhouse gas emissions, it was necessary to focus on utilizing nanomaterials instead of conventional materials to enhance clay soils; nano Magnesium Oxide was suggested for this study. The compression and unconfined compressive strength tests were achieved to assess the compressibility behavior and strength of silty clay treated using nano magnesium oxide. Additionally, an investigation into the alteration of the clay microstructure was conducted using field emission scanning electron microscopy (FE-SEM) tests. The silty clay utilized in this research is characterized by a compression index 0.23 and an undrained shear strength of 53 kPa. The soil was treated by adding different percentages of nano-MgO (0.4%, 0.5%, 0.6%, and 0.8%), and the curing period was seven days. The treated soil samples were prepared based on the optimal water content and maximal dry density of the natural soil. The results indicate that utilization of nano Magnesium Oxide leads to a reduction in both values of the index of compression (Cc) and recompression index (Cr), in addition to a decrease in the value of the coefficient of compressibility (av). Also, the test finding for unconfined compressive strength demonstrates a noticeable increase in strength as the percentage of nano-MgO increases, accompanied by a reduction in failure strain. Adding 0.6% (the optimum percentage) of nano Magnesium oxide enhances the strength by about 114% and decreases the value of the compression index by about 36% compared with natural soil.

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“…To overcome this problem, the concept of photocatalytic cementitious materials was introduced and it was found to be very effective to adsorb and convert harmful NO x into dilute nitric acid by the action of sunlight and rain without much effort. Usage of nanoparticles like SiO 2 , TiO 2 , Al 2 O 3 , Fe 2 O 3 , CNT, carbon nanofibers, graphene, and graphite oxide can also reduce the environmental impact associated with concrete production and also leads to extreme improvement in essential characteristics including the mechanical strength, fatigue resistance, high strength to weight ratio and the durability by stimulating the hydration reaction and filling the micro-pores in the cement paste (3)(4)(5)(6).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Cementitious Materials to Reduce Air Pollution: Review

Kumar¹,

Meda²,

Sachin³

et al. 2022

ECS Trans.

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Oxides of nitrogen (NOx) are highly reactive and major air pollutants generated from the vehicular emission and burning of fossil fuels in industries. These pollutants will create tropospheric ozone, formation of urban smog and occurrence of acid rain, etc. A potential solution for this would be heterogeneous photocatalysis. Using photocatalysts such as titanium dioxide (TiO2) inorganic and organic matter present in the air, such as NOx and VOCs can be adsorbed and oxidized by the action of ultraviolet (UV) light (sunlight). This technology is promising for cities with highly congested areas having high ground-level pollutant concentrations. Self-cleaning and air-purification coating with a super-hydrophilic photocatalyst (TiO2) coated on buildings can bring down the NOx concentration in the air. In addition, the incorporation of TiO2 in the form of nano-particles into cementitious materials will enhance their mechanical properties. This study evaluates and highlights the applications of nano titanium dioxide and its effects on the fresh and hardened characteristics of the cementitious composites.

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A Review: Influence of Potential Nanomaterials for Civil Engineering Projects

Cited by 12 publications

References 38 publications

Review of the use of nanomaterials in soils for construction of roads

Review of the use of nanomaterials in soils for construction of roads

Enhancement of Clay Compressibility and Strength Using Nano Magnesium Oxide

Photocatalytic Cementitious Materials to Reduce Air Pollution: Review

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