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Study on Properties of Concrete with UltraFine Particles

Study on Properties of Concrete with UltraFine Particles

Ultrafine particles in concrete

In this work, the influence of ultrafine particles on concrete properties was investigated. In the context of this work, ultrafine particles (reactive and inert materials) are particles finer than cement. Due to the development of effective superplasticizers, the incorporation of ultrafine particles in concrete is nowadays possible.

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Ultrafine particles in concrete: Influence of ultrafine particles on concrete properties and application to concrete mix design. ... (finer and coarser than cement) were used in this study, as ...

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The results from this study confirm that mechanical methods can produce ultrafine particles (UFP) from concrete, and that the particles are volatile. The ultrafine mode was only observed during concrete fracture, producing particle size distributions with average count median diameters of 27, 39 and 49 nm for the three tested concrete samples.

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May 01, 1998  A rheometer and the slump test were both used to measure the rheological properties at different ages, and the induced bleeding of the various concrete mixtures was investigated. An effort was made to explain why the production of HSC is made rheologically easier when ultrafine particles are added to the concrete mix.

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(PDF) Ultrafine particles in concrete: Influence of ...

Ultrafine particles in concrete: Influence of ultrafine particles on concrete properties and application to concrete mix design. ... (finer and coarser than cement) were used in this study, as ...

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Comparative study on chemical and morphology properties of ...

Jan 01, 2021  Abstract. Nano concrete is the new technology used in the material to produce highly dense and high performance concrete to withstand maximum load using nano sized materials in the concrete. Making of ultra fine fly ash and nano fly ash has been done with the help of ball milling process. The size of the nano particles are confirmed through ...

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The Influence of Ultrafine Filler Materials on Mechanical ...

ultrafine particles on the mechanical and durability characteristics of cement composites. In this study, the limestone powder was investigated as a common inert supplementary cementitious material. The influence of this material on the properties of cement composites has been the subject of several studies. Celik et al. (2014) reported

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Frontiers An Experimental Study on Strength ...

Aug 06, 2021  Figure 2 shows that the ultra-fine tailings are mainly composed of cohesive particles and powder particles, containing a small number of sand particles, and the shape of the particles is mostly irregular (Wolff et al., 2011).The surface of the particles is smooth with large surface energy. There is an agglomeration phenomenon found in the ultra-fine tailings (Wolff et al., 2011).

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EFFECT OF ULTRA-FINE FLY ASH ON THE MECHANICAL AND ...

For the ordinary concrete or high performance concrete, the enhancement was mainly attributed to the filler effect of ultra fine particles, as well as the secondary hydration reaction with portlandite to produce additional C-S-H gel. Fig. 4 shows the ESEM images of the

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STUDY THE EFFECTS OF NANO-SILICA ON CRACK

particles. The increased toughness is explained by bridging higher cracked surfaces in the presence of ultrafine particles. A number of empirical studies have also been conducted to understand the relationship between the cracking behavior of concrete and ultrafine particles. The results generally show a clear influence of the ultrafine mineral ...

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Use of ultrafine rice husk ash with high-carbon content as ...

Oct 12, 2008  Properties of concrete containing ultrafine RHA. The consistency (slump) of the reference concrete is reduced from 130 to 100 mm, 60 mm, and 20 mm, respectively, when 10%, 15% and 20% of ultrafine RHA is used as cement replacement. This decreasing in slump value occurs due to the high specific surface area and high-carbon content of the RHA.

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Study on Properties of Modified Reactive Powder Concrete ...

Oct 28, 2014  Abstract:- Reactive Powder Concrete (RPC) is an ultra-high strength and high ductility composite material with advanced mechanical properties. It is developed in 1990s by the French Company Bouygues. It is a special concrete wherein the microstructure is optimized by precise gradation of all particles in the mix to yield maximum density.

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(PDF) IRJET- EXPERIMENTAL STUDY ON COMPRESSIVE

irjet- experimental study on compressive strength of nano silica concrete. download. irjet- experimental study on compressive strength of nano silica concrete

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Materials Free Full-Text Influence of Ultrafine 2CaO ...

In this research, we assessed the influence of an ultrafine 2CaOSiO2 powder on the hydration properties of a reactive powder concrete system. The ultrafine powder was manufactured through chemical combustion method. The morphology of ultrafine powder and the development of hydration products in the cement paste prepared with ultrafine powder were investigated by scanning electron

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Experimental Study On The Enhancement In Concrete Due To ...

Dec 28, 2016  Introducing Micro-Fine particles, an advanced material in concrete that assist cement to overcome its feeble parts and have non-hazardous effect to people. In this paper we are going to discuss ...

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A Pilot Study of Nanoparticle Levels and Field Evaluation ...

ultrafine particles of 11.5 – 365.2 nm sizes ranging from 103 to 105 particles/cm3 (number concentration) and 1.41 to 99.96 µg/m3 (mass concentrations). • The field experiments in this study showed that concrete blasting and grinding activities can release morenanoparticles than wood building framework construction and soil

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Influence of Steatite and Fly Ash on the Fresh-Hardened ...

Oct 12, 2020  This experimental study investigates the effect of steatite and fly ash on the fresh and hardened properties of self-compacting concrete (SCC). Accordingly, ordinary Portland cement (53 grade) was replaced with various fractions of fly ash (10% and 20%) and with various percentages (5%, 10%, 15%, 20%, and 25#x0025;) of steatite by weight of cement as a filling material.

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A mechanism for the production of ultrafine particles from ...

The results from this study confirm that mechanical methods can produce ultrafine particles (UFP) from concrete, and that the particles are volatile. The ultrafine mode was only observed during concrete fracture, producing particle size distributions with average count median diameters of 27, 39 and 49 nm for the three tested concrete samples.

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Ultrafine particles to save cement and improve concrete ...

Fine particles play an important role in both fresh and hardened concrete and are often added as filler to give concrete specific properties. For example the development of more efficient ...

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Properties of Concrete Incorporating Ultrafine Fly Ash and ...

A laboratory study on the influence of the combination of ultrafine fly ash (UFFA) and silica fume (SF) on the properties of fresh and hardened concrete is described. Also compared are the performance of concrete incorporating UFFA and SF (ternary blend of cement), concrete incorporating UFFA or SF (binary blend of cement), and control portland ...

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Effect of Grinding on Physico-Mechanical Properties of ...

Specimen details: The Concrete mix design was made using IS method for M25 grade concrete to obtain a characteristic compressive strength of 25 N mm-2 (Target mean strength of 33.75 N mm-2) and based on the design, the mix proportion arrived was 1: 1.2: 2.4 [Cement: Fine Aggregate: Coarse Aggregate] with 0.43 as its water cement ratio.Specimens were prepared separately to study the

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Effects of Silica Fume, Ultrafine and Mixing Sequences on ...

The aim of this study is to investigate the effects of changing silica fume content, amount of crushed quartz powder as ultra fine aggregate and the sequence of mixing procedure on the main properties of Ultra High Performance Concrete (UHPC), with particular emphasis on 28 days compressive strength, density and slump.Several concrete mixes involving different contents of Silica fume and ...

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(PDF) Statistical modelling of the microfiller effect on ...

The ultra-fine LP reduced the ... plates were also used to study the rheological properties of cement paste ... easier when ultrafine particles are added to the concrete mix. ...

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(PDF) Effect of ultrafine natural steatite powder, super ...

Mar 23, 2021  The fresh concrete properties were studied using the slump flow test, T500 test, L-box test, and V-funnel test, whereas the hardened properties of SCC were studied by

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(PDF) Ultra High Performance Fiber Reinforced concrete-A ...

Aug 07, 2021  The study provides a comparison of the above mentioned UHPFRC properties with high performance concrete, fiber reinforced concrete and conventional structural concrete

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(PDF) Study on the post-fire properties of concrete with ...

Study on the post-fire properties of concrete with recycled tyre polymer fibres. ... contained more than 65% rubber particles. Therefore, a cleaning procedure based on a previous study ...

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Influence of Aggregate Type and Size on Ductility and ...

University, Toronto, ON, Canada. He is a member of ACI Committee 231, Properties of Concrete at Early Ages, and 237, Self-Consolidating Concrete. His research interests include the use of high-performance materials in the built infrastructure including the development and use of self-consolidating concrete in construction.

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Materials Free Full-Text Influence of Ultrafine 2CaO ...

In this research, we assessed the influence of an ultrafine 2CaOSiO2 powder on the hydration properties of a reactive powder concrete system. The ultrafine powder was manufactured through chemical combustion method. The morphology of ultrafine powder and the development of hydration products in the cement paste prepared with ultrafine powder were investigated by scanning electron

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Applications of using nano material in concrete: A review ...

For the purpose of concrete study, the application of nano materials must be at least 500 nm in size. The addition of ultrafine nano material will help to reduce the cement content by partially ...

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Abrasion resistance of ultra-high performance concrete ...

Jul 12, 2021  Ultra-high performance concrete (UHPC), also called ultra-high performance fiber-reinforced concrete (UHPFEC), exhibits superior properties of advanced strength, ductility, and durability, which is one of the latest trends in the concrete industry [1, 2].It also has the potential to be used in heavily trafficked pavement, industrial floors, and bridge deck overlays that are prone to

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Release of ultrafine particles from three simulated ...

Mar 09, 2012  Building activities are recognised to produce coarse particulate matter but less is known about the release of airborne ultrafine particles (UFPs; those below 100 nm in diameter). For the first time, this study has investigated the release of particles in the 5–560 nm range from three simulated building activities: the crushing of concrete cubes, the demolition of old concrete slabs, and the ...

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