Author
Qi Jiang
Bio: Qi Jiang is an academic researcher from Wuhan University of Technology. The author has contributed to research in topics: Silica fume & Superhydrophobic coating. The author has an hindex of 5, co-authored 16 publications receiving 71 citations.
Papers
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TL;DR: In this article, the effect of adding silica fume in different stages on properties of foamed concrete was explored by viscosity, density, water desorption, compressive strength, strength/weight ratio, scanning electron microscope (SEM) and pore size distribution analysis.
48 citations
TL;DR: In this article, a Raspberry-like SiO2@polystyrene microspheres (PSS) template was used for the deposition of TiO2 nanoparticles on the raspberry-like PSS template with preferred deposition among interstitials of the drupelet-like structure.
29 citations
TL;DR: In this article, the authors compared the gliding effect of different sizes, shapes and surface properties on poor-flow gypsum powder, and found an optimum glidant which could improve the flowability of the modified powders, resulting in good quality during 3D powder printing.
22 citations
TL;DR: In this paper, the effect of sonication treatment on silica fume particle dispersion was studied and compared in cement paste, showing that the spreading of the paste containing sonication treated silica Fume was decreased.
19 citations
TL;DR: In this article, the effect of different mixing sequences of cationic calcium ions (Ca2+) and anionic polycarboxylate superplasticizer (PCE) on dispersing a low grade silica fume (SF) was compared in both aqueous suspension and cement paste.
16 citations
Cited by
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TL;DR: In this paper , the authors present a new material that can be used as a partial substitute for cement in the production of ultra high performance concrete (UHPC), which is an industrial waste product of ferrosilicon (FS) alloy, available as furnace slag.
98 citations
TL;DR: This paper is the first comprehensive review of the use of man-made and natural fibres to produce fibre-reinforced foamed concrete (FRFC), and it was found that the rheological properties of the FRFC mix are influenced by the properties of both fibres and foam.
Abstract: Foamed concrete (FC) is a high-quality building material with densities from 300 to 1850 kg/m3, which can have potential use in civil engineering, both as insulation from heat and sound, and for load-bearing structures. However, due to the nature of the cement material and its high porosity, FC is very weak in withstanding tensile loads; therefore, it often cracks in a plastic state, during shrinkage while drying, and also in a solid state. This paper is the first comprehensive review of the use of man-made and natural fibres to produce fibre-reinforced foamed concrete (FRFC). For this purpose, various foaming agents, fibres and other components that can serve as a basis for FRFC are reviewed and discussed in detail. Several factors have been found to affect the mechanical properties of FRFC, namely: fresh and hardened densities, particle size distribution, percentage of pozzolanic material used and volume of chemical foam agent. It was found that the rheological properties of the FRFC mix are influenced by the properties of both fibres and foam; therefore, it is necessary to apply an additional dosage of a foam agent to enhance the adhesion and cohesion between the foam agent and the cementitious filler in comparison with materials without fibres. Various types of fibres allow the reduction of by autogenous shrinkage a factor of 1.2-1.8 and drying shrinkage by a factor of 1.3-1.8. Incorporation of fibres leads to only a slight increase in the compressive strength of foamed concrete; however, it can significantly improve the flexural strength (up to 4 times), tensile strength (up to 3 times) and impact strength (up to 6 times). At the same time, the addition of fibres leads to practically no change in the heat and sound insulation characteristics of foamed concrete and this is basically depended on the type of fibres used such as Nylon and aramid fibres. Thus, FRFC having the presented set of properties has applications in various areas of construction, both in the construction of load-bearing and enclosing structures.
75 citations
TL;DR: In this paper, a reduction of water demand of cement pastes results in the decrease of the cement matrix porosity and, accordingly, in the increase of its strength and durability.
Abstract: Reduction of water demand of cement pastes results in the decrease of the cement matrix porosity and, accordingly, in the increase of its strength and durability. The fluidity increase of t...
42 citations
TL;DR: The Na-SiO2@TiO2 heterogeneous base catalyst was designed and successfully applied to the transesterification reaction of waste cooking oil for sustainable biodiesel production.
35 citations
TL;DR: Experimental results showed that the chemical admixtures adsorbed by coal fly ash were increased by the introduction of NH3HSO4 or (NH3)2SO4 and the pore structure was coarsened and porosity was increased for the hardened cement specimens due to the release of ammonia and lower hydration degree.
34 citations