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Compressive strength and stability of sustainable self-consolidating concrete containing fly ash, silicafume, and GGBS

Osama Ahmed MOHAMED, Omar Fawwaz NAJM

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 4,   Pages 406-411 doi: 10.1007/s11709-016-0350-1

Abstract: self-consolidating concrete (SCC) mixes where up to 80% of Portland cement was replaced with fly ash, silicafume, or ground granulated blast furnace slag.Replacing cement with silica fume at 5%, 10%, 15%, and 20% was found to increase compressive strengthcompressive strength of 95.3 MPa occurred with SCC mixes in which 15% of the cement was replaced with silicafume.

Keywords： fly ash     silica fume     ground granulated blast-furnace slag     self-consolidating concrete     and sustainable    

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Performance assessment of Alccofine with silica fume, fly ash and slag for development of high strength

Shivang D. JAYSWAL; Mahesh MUNGULE

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 5,   Pages 576-588 doi: 10.1007/s11709-022-0826-0

Abstract: Previous studies on concrete have identified silica fume (SF) as the most effective supplementary material

Keywords： Alccofine     high strength mortar     efficiency factor     dilution effect    

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Deep learning model for estimating the mechanical properties of concrete containing silica fume exposed

Harun TANYILDIZI, Abdulkadir ŞENGÜR, Yaman AKBULUT, Murat ŞAHİN

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1316-1330 doi: 10.1007/s11709-020-0646-z

Abstract: this study, the deep learning models for estimating the mechanical properties of concrete containing silicafume subjected to high temperatures were devised.Silica fume was used at concentrations of 0%, 5%, 10%, and 20%.used for forecasting the compressive strength and ultrasonic pulse velocity of concrete containing silicafume subjected to high temperatures.

Keywords： concrete     high temperature     strength properties     deep learning     stacked auto-encoders     LSTM network    

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Predicting the strength properties of slurry infiltrated fibrous concrete using artificial neural network

T. Chandra Sekhara REDDY

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 490-503 doi: 10.1007/s11709-017-0445-3

Abstract: This paper is aimed at adapting Artificial Neural Networks (ANN) to predict the strength properties of SIFCON containing different minerals admixture. The investigations were done on 84 SIFCON mixes, and specimens were cast and tested after 28 days curing. The obtained experimental data are trained using ANN which consists of 4 input parameters like Percentage of fiber (PF), Aspect Ratio (AR), Type of admixture (TA) and Percentage of admixture (PA). The corresponding output parameters are compressive strength, tensile strength and flexural strength. The predicted values obtained using ANN show a good correlation between the experimental data. The performance of the 4-14-3 architecture was better than other architectures. It is concluded that ANN is a highly powerful tool suitable for assessing the strength characteristics of SIFCON.

Keywords： artificial neural networks     root mean square error     SIFCON     silica fume     metakaolin     steel fiber    

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Seismic retrofitting of severely damaged RC connections made with recycled concrete using CFRP sheets

Yasmin MURAD, Wassel AL BODOUR, Ahmed ASHTEYAT

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 554-568 doi: 10.1007/s11709-020-0613-8

Abstract: Cement is partially replaced by silica fume, iron filling and pulverised fuel ash using two differentIncreasing cement replacement percentage by silica fume, fuel ash or iron filling from 15% to 20% hasIt is recommended using 15% pulverised fuel ash or silica fume as cement partial replacement to enhancerecommended but the enhancement is relatively less than that found with pulverised fuel ash concrete and silicafume concrete.

Keywords： retrofitting     CFRP sheets     recycled concrete     pulverised fuel ash     silica fume     cyclic     beam-column connections    

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Optimizing the compressive strength of concrete containing micro-silica, nano-silica, and polypropylene

Fatemeh ZAHIRI, Hamid ESKANDARI-NADDAF

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 821-830 doi: 10.1007/s11709-019-0518-6

Abstract: Many studies have evaluated the effects of additives such as nano-silica (NS), micro-silica (MS) and

Keywords： mixture method     compressive strength     nano-silica     micro-silica     polypropylene fibers    

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Dispersion of “guava-like” silica/polyacrylate nanocomposite particles in polyacrylate matrix

QI Dongming, YANG Lei, WU Minghua, SHAO Jianzhong, BAO Yongzhong

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2,   Pages 127-134 doi: 10.1007/s11705-008-0033-0

Abstract: A series of “guava-like” silica/polyacrylate nanocomposite particles with close silica content and differentThe silica/polyacrylate composite particles were melt-mixed with unfilled polyacrylate (PA) resin toprepare corresponding silica/polyacrylate molded composites and the dispersion mechanism of these silicaIt was calculated that about 110 silica particles were accumulated in the bulk of every silica/polyacrylateindicated that the grafting degree of silica particles played a crucial role in the dispersion of silica

Keywords： silica/polyacrylate composite     cross-linked network     –70     guava-like     TEM    

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Enhanced activation of persulfate using mesoporous silica spheres augmented Cu–Al bimetallic oxide particles

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1581-1592 doi: 10.1007/s11705-023-2327-7

Abstract: Herein, Cu–Al bimetallic oxide was synthesized and mixed with mesoporous silica spheres via a simplespectroscopy, Cu–Al bimetallic oxide was determined as CuO-Al2O3, and mesoporous silicaFurthermore, mesoporous silica spheres augment not only enhanced bisphenol A adsorption but also alleviated

Keywords： Cu–Al bimetallic oxides     mesoporous silica spheres     peroxydisulfate     bisphenol A    

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The modification of titanium in mesoporous silica for Co-based Fischer–Tropsch catalysts

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1224-1236 doi: 10.1007/s11705-022-2139-1

Abstract: Ordered SBA-15 mesoporous silica with incorporated titanium was successfully synthesized via a one-potThe results showed that titanium was successfully incorporated into the mesoporous silica framework with

Keywords： Fischer–Tropsch synthesis     titanium incorporation     mesoporous silica     metal-support interactions     C   

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The construction of pseudo-Janus silica/surfactant assembly and their application to stabilize Pickering

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 7,   Pages 1101-1113 doi: 10.1007/s11705-021-2095-1

Abstract: The findings of this study could help to better understand the construction mechanism of pseudo-Janus silica

Keywords： Janus nanoparticles     surfactant     double phase inversion     self-assembly     enhanced oil recovery    

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Effects of polyethylenimine on the dispersibility of hollow silica nanoparticles

WEN Lixiong, WANG Qing, ZHENG Tianyuan, CHEN Jianfeng

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 277-282 doi: 10.1007/s11705-007-0050-4

Abstract: In this study, two different methods were applied to disperse hollow silica nanoparticles (HSNP); one

Keywords： dispersion improvement     different     prepared HSNP     relationship     agglomeration    

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copolymerization of -isopropylacrylamide with 3-(methacryloxy)propyl trimethoxysilane on ultrafine silica

ZHANG Liping, ZHU Yi, NI Caihua

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 3,   Pages 242-247 doi: 10.1007/s11705-008-0043-y

Abstract: isopropylacrylamide with [ 3-(methacryloxy) propyl]trimethoxysilane (MPT) coupled on the surface of ultrafine silicaThe structure of modified silica was confirmed by infrared spectra.In contrast, the packing material of silica-MPT has no such separation efficiency due to the lack ofattributed to a polarity change of poly(-isopropylacrylamide) which undergoes volume phase transition on the silica

Keywords： undergoes     water-methanol     surfactant concentration     copolymerization     chromatography    

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Sulfonic acid-functionalized mesoporous silica catalyst with different morphology for biodiesel production

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1198-1210 doi: 10.1007/s11705-021-2133-z

Abstract: Sulfonic acid functionalized mesoporous silica based solid acid catalysts with different morphology wereThe sulfonic acid functionalized mesoporous silica catalysts of spherical shape and the cube shape wereIt was sulfonated cubic shape mesoporous silica which exhibited better activity as compared to the sphericalshape silica catalysts.

Keywords： solid acid catalyst     mesoporous silica     sulfonic acid     biodiesel     esterification     oleic acid    

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Preparation and characterization of polyimide/silica/silver composite films

JIANG Lizhong, WU Dezhen, LUO Ning, WU Zhanpeng, MOU Nanxiang

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 3,   Pages 291-295 doi: 10.1007/s11705-008-0059-3

Abstract: Polyimide/silica/silver hybrid films were prepared by the sol-gel method combined with single-stageThe structure of polyimide films in the thermal curing process and the influence of silica content onThe results indicated that there was no degradation of the polyimide matrix after the formation of silicaSilica acted as the nucleus for the silver particles.With increasing silica content, more and more silver particles were kept in the hybrid films instead

Keywords： single-stage self-metallization     spectroscopy     transmission     Polyimide/silica/silver     ultraviolet visible    

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Synthesis of ordered cerium-doped cubic mesoporous silica using long-chain ionic liquid as template

YUE Hongxia, ZHAO Hongmei, LIU Longjiang, WANG Siping, Ruan Qiong, WANG Tongwen

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2,   Pages 135-139 doi: 10.1007/s11705-008-0031-2

Abstract: The long-chain ionic liquid 1-hexadecyl-3-methylimidazolium chloride (CmimCl) was used as a template to prepare cerium-doped MCM-48 materials in basic medium by a hydrothermal synthesis procedure. The effect of the amount of Ce salt and CmimCl/Si on the synthesis were discussed in detail. This mesoporous material exhibits a pore architecture which is cubic 3 gyroid and possesses a large surface area and a narrow pore distribution. Cerium in calcined porous framework exists in the form of well-dispersed tetrahedral coordination. The CmimCl shows a high tendency toward self-aggregation that allows the formation of the cerium-doped gyroid mesostructure by using the appropriate amount of Ce salt.

Keywords： mesoporous     CmimCl/Si     tendency     mesostructure     synthesis procedure    

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Title Author Date Type Operation

Compressive strength and stability of sustainable self-consolidating concrete containing fly ash, silicafume, and GGBS

Osama Ahmed MOHAMED, Omar Fawwaz NAJM

Journal Article

Performance assessment of Alccofine with silica fume, fly ash and slag for development of high strength

Shivang D. JAYSWAL; Mahesh MUNGULE

Journal Article

Deep learning model for estimating the mechanical properties of concrete containing silica fume exposed

Harun TANYILDIZI, Abdulkadir ŞENGÜR, Yaman AKBULUT, Murat ŞAHİN

Journal Article

Predicting the strength properties of slurry infiltrated fibrous concrete using artificial neural network

T. Chandra Sekhara REDDY

Journal Article

Seismic retrofitting of severely damaged RC connections made with recycled concrete using CFRP sheets

Yasmin MURAD, Wassel AL BODOUR, Ahmed ASHTEYAT

Journal Article

Optimizing the compressive strength of concrete containing micro-silica, nano-silica, and polypropylene

Fatemeh ZAHIRI, Hamid ESKANDARI-NADDAF

Journal Article

Dispersion of “guava-like” silica/polyacrylate nanocomposite particles in polyacrylate matrix

QI Dongming, YANG Lei, WU Minghua, SHAO Jianzhong, BAO Yongzhong

Journal Article

Enhanced activation of persulfate using mesoporous silica spheres augmented Cu–Al bimetallic oxide particles

Journal Article

The modification of titanium in mesoporous silica for Co-based Fischer–Tropsch catalysts

Journal Article

The construction of pseudo-Janus silica/surfactant assembly and their application to stabilize Pickering

Journal Article

Effects of polyethylenimine on the dispersibility of hollow silica nanoparticles

WEN Lixiong, WANG Qing, ZHENG Tianyuan, CHEN Jianfeng

Journal Article

copolymerization of -isopropylacrylamide with 3-(methacryloxy)propyl trimethoxysilane on ultrafine silica

ZHANG Liping, ZHU Yi, NI Caihua

Journal Article

Sulfonic acid-functionalized mesoporous silica catalyst with different morphology for biodiesel production

Journal Article

Preparation and characterization of polyimide/silica/silver composite films

JIANG Lizhong, WU Dezhen, LUO Ning, WU Zhanpeng, MOU Nanxiang

Journal Article

Synthesis of ordered cerium-doped cubic mesoporous silica using long-chain ionic liquid as template

YUE Hongxia, ZHAO Hongmei, LIU Longjiang, WANG Siping, Ruan Qiong, WANG Tongwen

Journal Article