The influence of nano-silica and barite aggregate on properties of ultra high performance concrete

Janković, Ksenija; Stanković, S.; Bojović, Dragan; Stojanović, Marko; Antić, Lana

doi:10.1016/j.conbuildmat.2016.09.026

Cited by 113 publications

(46 citation statements)

References 31 publications

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“…The round shape of the particles in the sand reduces the friction and improves the mix flow. On the contrary, crushed aggregates such as magnetite and barite show sharp edges that stop the flow of the mix [12,13].…”

Section: Selection Of Proper Materialsmentioning

confidence: 99%

Use of DMDA method for production of heavyweight concrete

Techman

Skibicki

2018

MATEC Web Conf.

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Waste materials are defined as all unwanted substances from manufacturing processes, including mining, industry, agriculture and others. One of the most commonly used waste product in concrete manufacturing is Fly Ash (FA). Studies have shown that the content of Fly Ash increases the workability of concrete, being useful in production of Self-Consolidating Concretes (SCC). One of the designing methods involving high amounts of fly ash is based on the Densified Mixture Design Algorithm (DMDA). This article attempts to work out HWSCC manufacturing method using the DMDA method with the use of barite and magnetite aggregates. The study integrates six concrete mixes. Concrete strength was tested on 10x10x10 cm samples after 3,7 and 28 days. The rheological properties were tested with Slump Test to find out if the mixes exhibit self-consolidating properties. Concretes with magnetite aggregate exhibit higher strength than concretes with barite aggregate. The study has shown that the DMDA method, designed to produce durable, low-cement concrete may not be applicable in the case of crushed aggregates. The study has shown that the method allows to decrease the cement amount and re-place it with pozzolan waste product to acquire concretes with similar properties to the ones acquired using different methods.

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Section: Selection Of Proper Materialsmentioning

confidence: 99%

Use of DMDA method for production of heavyweight concrete

Techman

Skibicki

2018

MATEC Web Conf.

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“…To design an effective shielding, a precise knowledge of the properties of shielding materials such as radiation attenuation coefficient is needed . Some studies showed that using material with high atomic number and high density (such as iron, barite, and lead) affect significantly the shielding effect against X‐rays . These materials work very well in combination with concrete, which intrinsically possesses the ability to attenuate radiation.…”

Section: Introductionmentioning

confidence: 99%

“…2 Some studies showed that using material with high atomic number and high density (such as iron, barite, and lead) affect significantly the shielding effect against X-rays. [3][4][5][6][7][8][9][10][11][12][13] These materials work very well in combination with concrete, which intrinsically possesses the ability to attenuate radiation. However, heavy aggregates can lead segregation and bleeding effects, with a great expenditure of energy during the vibration and compaction.…”

Section: Introductionmentioning

confidence: 99%

Design of bismuth oxide nanoparticles as lightweight aggregate in cement composites against X‐rays

Restuccia

Favero

Jagdale

et al. 2019

Mat Design Process Comm

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Nowadays, heavy concrete is becoming one of the most commonly used materials against X‐ray radiation (medical or nuclear). This type of concrete is enriched by heavy aggregates with high density and/or high atomic number such as magnetite or barite, which allow to obtain an appreciable shielding effect but may present problems related to high manufacturing costs. Moreover, very heavy concretes can be achieved with iron or lead shot as aggregate, but in this case, the big problem is related to the toxicity and harmful for human health. In this research work, bismuth—a cheap, nontoxic, and biocompatible element, characterized by having a high atomic number Z (Z = 83)—has been used as additive in cement mixture, with the purpose to indagate its effectiveness as shielding agent and to analyze the mechanical strength response.

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“…Thereat, it is shown non-destructive method for determining the gamma radiation absorption characteristics of concrete [7]. In references [8,9], one of the goals is to implement appropriate numerical calculations for obtaining the value of the total mass attenuation coefficient in the energy range 10 keV -150 MeV of gamma and X radiation, and their dependence in the content of barite and nano-silica in UHPC concrete with specially defined mechanical properties. Nanosilica has a dominant influence on the improvement of the mechanical properties, and barite has a dominant influence on the characteristics that increase the absorption of ionizing radiation, i.e., improves the characteristics for protection against ionizing radiation.…”

Section: Introductionmentioning

confidence: 99%

Numerički Proračun Karakteristika Betona Za Atenuaciju Jonizujućeg Zračenja

Stanković¹,

Janković²,

Despotović³

2019

Zbornik GFS

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This paper presents a method of numerical calculations of the total mass attenuation coefficient as one of the basic radiation characteristics of materials used for produced of concrete for a special purpose. Using the XCOM software, numerical calculations were made, and then the results between the mass attenuation coefficient values for the selected type of concrete with barite, for concrete which are a combination of steel with magnetite and steel with limonite, and for UHPC concrete with barite and nanosilica, are compared.

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The influence of nano-silica and barite aggregate on properties of ultra high performance concrete

Cited by 113 publications

References 31 publications

Use of DMDA method for production of heavyweight concrete

Use of DMDA method for production of heavyweight concrete

Design of bismuth oxide nanoparticles as lightweight aggregate in cement composites against X‐rays

Numerički Proračun Karakteristika Betona Za Atenuaciju Jonizujućeg Zračenja

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