Mineral admixtures such as silica fume (SF), class F fly ash (FA), rice husk ash (RHA), and ground granulated blast furnace slag (GGBFS) were used as partial replacement of cement.
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Three kinds of nano admixtures (silica fume, nano-SiO 2, nano-CaCO 3) were selected as modified materials, and the effect of nano admixtures on the fluidity, strength, internal temperature, micro-morphology, mineral composition and pore structure of sulphoaluminate cement mortar were studied under the condition of mixing and curing of cooled ...
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The impermeability of concrete is very important to its durability and service life, which could be affected by nanomaterial and mineral admixture additions. This paper tends to …
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As sustainability emerged as an indispensable factor in concrete industry, many researchers targeted micro sized mineral admixtures such as silica fume, fly ash, rice husk ash, slag and so on in order to replace Portland cement which is known to be responsible for almost 7% of carbon dioxide emission into atmosphere.Recently, technology has ...
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This paper critically reviews earlier research carried out on the influence of using nano silica, nano colloidal silica, nano alumina, nano-Fe 2 O 3, nano-Fe 3 O 4, nano MgO, …
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Recently, the trend of replacing cement with mineral admixtures in concrete has witnessed increasing interest in the construction industry due to the reduction in embodied energy and CO 2 emissions. However, the addition of these admixtures in Portland Cement (PC) affected the formation as well as the structure of the hydration product Calcium-Silicate-Hydrate (C-S …
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Recent studies have evaluated nano-sized mineral admixtures that can provide unique properties to concrete, replacing a portion of cement (Qing et al. Citation 2007; Kim et al. Citation 2004). These studies examined the effects of various nano-sized materials (e.g., nano-SiO 2, TiO 2, Al 2 O 3, and Fe 2 O 3 ) on the physical and mechanical ...
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Effects of micro-nano bubble water and binary mineral admixtures on the mechanical and durability properties of concrete Moein Khoshrooa, Ali Akbar Shirzadi Javidb,⇑, Ali Katebic a M.Sc. Student in Construction Management and Engineering, Civil Engineering Department, Faculty of Engineering, Kharazmi University, Tehran, Iran bSchool of Civil Engineering, Iran …
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The effects of different mineral admixtures on the evolution of static yield stress of common composite cementitious material paste and ultra-high-performance concrete (UHPC)-based paste were investigated. The …
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The term nanomaterials coined in the initial years of 1980 decade, wherein subdivision size lies in the range 1 nm to100 nm, with a great specific surface area, importance being given to metallic nanoparticle, non-metallic nanoparticle, carbon-based nano-particle, mineral nano-particle, etc [37]. Nano sized materials eluding research interests ...
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nano-sized mineral admixtures that can provide unique properties to concrete, replacing a portion of cement (Qing et al. 2007; Kim et al. 2004). These studies exam-ined the effects of various nano-sized materials (e.g., nano-SiO 2,TiO 2,Al 2O 3, and Fe 2O 3) on the physical and mechanical characteristics of concrete. They have
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The nano-engineered cementitious composites (NCC) were prepared using g-C 3 N 4 /CoAl-LDH nanoflower (nano-CN/L), in combination with mineral admixtures including fly ash (FA), metakaolin (MK), and ground granulated blast furnace slag (GGBFS). The synergistic effects and mechanisms of nano-CN/L and mineral admixtures on the mechanical, chloride …
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As the use of mineral admixtures is increasing every day, its impact on the durability of concrete under an aggressive chloride environment deserves a detailed investigation. ... Ammar, S., Ramesh, K., Vengadaesvaran, B., Ramesh, S., & Arof, A. K. (2016). A novel coating material that uses nano-sized SiO 2 particles to intensify hydrophobicity ...
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Literature showed that nano sized TiO 2 coating elements can help to destroy pollutant molecules that are released during fossil fuels combustion that create smog when combined with volatile organic compounds ... expansive agents and mineral admixtures that promote cementitious re-crystallization after hydration, ...
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Stark, J., Moser, B. and Bellmann, F. (2007) Nucleation and Growth of C-S-H Phases on Mineral Admixtures. Advances in Construction Materials, 531-538. has been cited by the following article: TITLE ... ABSTRACT: Nano-sized particles have got a focus of great interest for the past decade. These ultrafine particles can have an effect in multiple ...
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Nano-sized materials, in the form of Fly-Ash (FA), Silica Fume (SF), Phosphogypsum (PG), and Alccofine (AC), have garnered considerable attention due to their unique properties and potential to revolutionize the properties of traditional concrete. ... the nano mineral admixtures improve results in all areas, such as mechanical characteristics ...
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The research aims to improve the mechanical properties of cement mortar by using Nano concrete materials and mineral admixtures. Their mechanical properties have been investigated through the compression test, their particle composition and its arrangements are analyzed through the Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD).
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In the cement concrete industry, everybody is concerned about high-strength and high-performance behavior of concrete. These properties were improved using micro- and nano-sized pozzolanic mineral admixtures as stated by various authors. In this paper, author has emphasized mostly on using micro- and nanosilica materials with cement. Literature survey revealed that …
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The present research examines the compressive and tension strength of nano cement mortar by using micro cement, micro sand, nano silica and nano clay in developing a …
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Nano binders or nano sized mineral admixtures and nano sized cementitious materials were proposed by researches as a solution for reducing the carbon emissions and as an aid to achieve high strength [1]. The addition of nano fillers makes the cementitious materials stronger and more durable. Nano sized particles have high surface area to volume ...
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Several nano-sized particles are used as a nano-additive in the cement-based materials to enhance their properties at the macroscopic level and ... to yield CSH, nS has gained particular attention in comparison with conventional minerals admixtures [30], [31]. Such behaviours of nS resulted in improved mechanical properties in the concrete ...
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Common thixotropic admixtures used in 3D are comprised of nano clays, in particular of nano-sized bentonite and attapulgite. The advantage of attapulgite over bentonite is that it can provide higher thixotropy in the ion-loaded cementitious pore solution, however it requires intensive shearing to sufficiently activate the needle-like ...
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ABSTRACT Superplasticizers are the most important admixtures enhancing concrete performance. The development of new superplasticizers during the last decades has determined the most important progress in the field of concrete structures in terms of higher strength, longer durability, lower shrinkage and safer placement particularly in elements with very congested …
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These properties were improved using micro- and nano-sized pozzolanic mineral admixtures as stated by various authors. In this paper, author has emphasized mostly on using micro- and nanosilica materials with cement. Literature survey revealed that the most suited mineral admixtures for getting highest behaviors are micro- and nanosilica.
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Improving the 3D Printability of High-Volume Fly Ash Mixtures Through Addition of Mineral Admixtures. Conference paper; First Online: 07 November ... It was observed that a small addition of nano clay to HVFA mixes could effectively ... G.R., Wang, K.: Influence of nano-sized highly purified magnesium alumino silicate clay on thixotropic ...
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There are many mineral admixtures utilized in concretes, such as the most common silica fume, but recently with the advancement of nanotechnology, sub-micron and nano-sized materials have been ...
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The enhancement in the compressive strength at early ages of 3 and 7 days can be attributed to the its particles in nano-sized with high surface area that accelerate the cement hydration at early ...
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50% of nano sized cement, fly ash and silica fume. Materials were converted to nano size by grinding in ball milling machine and its particle size was determined by scanning electron ... the mineral and the chemical admixtures used in concrete. The transport of moisture in to concrete by capillary action is also considered
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Quanji et al. [13] found that nano-sized highly purified magnesium alumino silicate clay can significantly increase the structural build-up rate of pastes. Ahari et al. [22] examined the effect of supplementary cementitious materials ... mineral admixtures makes the electrical double layer more com-plicated. Thus, it is also interesting to ...
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Mineral and chemical admixtures for concrete have been widely used to satisfy the design requirements of building constructions [1], [2], [3].In recent years, it has been found that a partial replacement of cement with nano-sized mineral admixtures significantly improves the performance of concrete [4], [5], [6], [7].In the literature, there are a number of studies …
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