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Setting time and compressive strength of geopolymer concrete with variations in the addition of cement

AIP Conference Proceedings 2024年第1期3098卷

作者： Yayan Adi Saputro Jati Widagdo Syamsul Arifin Sa’dullah Assa’idi Nimas Aulia Pambajeng Miftahunnajah Abdul Talib Bon Civil Engineering Program Study Faculty of Science and Technology Islamic University of Nahdlatul Ulama Jepara Jepara Indonesia Product Design Program Study Faculty of Science and Technology Islamic University of Nahdlatul Ulama Jepara Jepara Indonesia Management Program Study Faculty of Economics and Business Islamic University of Nahdlatul Ulama Jepara Jepara Indonesia Islamic Education Management Study Program Islamic University of Nahdlatul Ulama Jepara Jepara Indonesia Balekambang Polytechnic Jepara Jepara Indonesia Professor of Technology Management Faculty of Technology Management and Business Universiti Tun Hussein Onn Malaysia Parit Raja Johor Malaysia

The increasing demand for cement in the world of construction can have an extraordinary effect, especially in the production of cement which produces CO2. So we need an alternative material as a substitute and even replace the role of cement. Utilization of coal waste in the form of fly ash is in the spotlight to be maximized. Therefore this research was conducted as an alternative contribution to the solution using geopolymer concrete in terms of setting time and compressive strength with variations in the addition of cement. The method used is experimental in the laboratory which produces qualitative data for further numerical calculations. Tests focused on the setting time and compressive strength of concrete using 5 mix designs with cement variations ranging from 10%, 20%, 30%, 40% of the use of fly ash. The results of the setting time with the highest duration, namely 100% FA=1.5, 95 minutes initial setting time and 225 minutes final setting time, then decreased to the lowest duration, namely 60% FA: Pc 40%=1.5. The initial setting time is 15 minutes and the final setting time is 37 minutes. The highest concrete compressive strength results in the MD 4 mix design with 70% FA mixture: Pc 30%=1.5, which is 43.3 MPa. While the lowest compressive strength is the design mix MD 1 with a mixture of 100% FA=1.5 of 21.8 MPa.

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Modeling crystallographic anisotropy in interfacial sliding phenomenon in nanoindentation of nanoscale Cu/Nb accumulated rolling bonding (ARB) multilayered materials

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AIP Conference Proceedings 2023年第1期2594卷

作者： A. S. Budiman R. Sahay F. E. Gunawan C. Harito H. Gunawan I. Radchenko E. Navarro S. Escoubas T. Cornelius O. Thomas N. Raghavan Industrial Engineering Department BINUS Graduate Program – Master of Industrial Engineering Bina Nusantara University Jakarta Indonesia Xtreme Materials Lab Engineering Product Development Singapore University of Technology and Design (SUTD) Singapore Industrial Engineering Department Faculty of Engineering Bina Nusantara University Jakarta Indonesia 11480 Center for Advancing Materials Performance from the Nanoscale (CAMP-nano) State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University (XJTU) Xi'an China Aix-Marseille Université CNRS IM2NP UMR 7334 Marseille France

Nanoindentation is widely used to investigate mechanical properties of materials at small scales. In this work, owing to the presence of contrasting interfaces along rolling (RD) and transverse direction (TD), a 16 nm accumulative roll bonding (ARB) Cu/Nb nanolaminate as a test material due to its crystallographic anisotropy was used. Nanoindentation was performed and then Scanning Probe Microscopy (SPM) data was conducted to measure the pile-up height along RD and TD in the nanoscale Cu/Nb multilayered materials. It was found that the 16 nm Cu/Nb ARB nanolayered material along RD showed higher surface pile-up than TD attributed the observation to the variation in the Cu/Nb interface plasticity along RD and TD. Further, a comparation and validation of experimental indentation data by performing 2D axisymmetric Finite Element Analysis (FEA) indicated that the simulation compares well with the experimentally generated load-displacement curves, while qualitative agreement was obtained with the pileup data. It is believed that the characterization of surface pile-up is very important for enabling the nanoscale Cu/Nb ARB nanolaminates as the novel stretchable/flexible metallic conductor materials (with emerging applications such as e-skins, human-computer interaction, and soft robotics) that may prove crucial for the global green and sustainability efforts (soft robots for collecting plastic trashes in ocean).

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Experimental Study on the Scavenging Effect of Chestnut Flower Extract on Nitrite

Experimental Study on the Scavenging Effect of Chestnut Flow...

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2019 International Conference on Civil engineering, Environment Resources and Energy Materials, CCESEM 2019

作者： Cai, Z.Y. Zhang, X.Y. Han, M.M. Gao, X. Pang, M.X. Qi, J.H. Wang, F. Beijing Key Laboratory of Agricultural Product Detection and Control of Spoilage Organisms and Pesticide Residue Beijing University of Agriculture Beijing102206 China Teaching Group of Food Chemistry Faculty of Food Science and Engineering Beijing University of Agriculture Beijing102206 China Beijing Innovation Consortium of Swine Research System Beijing102202 China Graduation Design of the Practical Training Program Cross-Cultivation of High-Level Talents in Beijing Colleges and Universities 2018 China

This paper aims to reveal the scavenging effects of chestnut flower extract on nitrite. The effects of extraction temperature, extraction time, ethanol concentration on the removal effect of nitrite were studied by single factor test and orthogonal test. The best conditions for removing nitrite in the result were shown as below: extraction temperature: 40 ?C, ethanol concentration: 40%, extraction time: 1.5 h, and the maximum scavenging rate could reach 94% are the optimal conditions for its reaction with nitrite. © Published under licence by IOP Publishing Ltd.

关键词： Fruits

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products Analysis and Molecular identification of Flavonoids-Produce Endophytic fungi in Ginkgo Biloba

Products Analysis and Molecular identification of Flavonoids...

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2019 International Conference on Civil engineering, Environment Resources and Energy Materials, CCESEM 2019

作者： Zhang, X.Y. Li, X. Han, M.M. Cai, Z.Y. Gao, X. Pang, M.X. Qi, J.H. Wang, F. Beijing Key Laboratory of Agricultural Product Detection and Control of Spoilage Organisms and Pesticide Residue Beijing University of Agriculture Beijing102206 China Teaching Group of Food Chemistry Faculty of Food Science and Engineering Beijing University of Agriculture Beijing102206 China Beijing Innovation Consortium of Swine Research System Beijing102202 China Graduation Design of the Practical Training Program Cross-Cultivation of High-Level Talents in Beijing Colleges and Universities 2018 China

Endophytic fungi (Y6, Y8, Y10, G8) of ginkgo were studied in this paper to clarify what species of them, what kind of flavonoids of their metabolite, and the bacteriostatic activity of fermentation liquid from endophytic fungi. Disc diffusion method was used to determine antibacterial properties that the target strains to dominant spoilage bacteria X15 (bacillus), T10 (proteus), X5 (aureus), N4 (Serratia marcescens) from low temperature meat products, the results showed that Y6, Y8 and Y10 had best strains antibacterial properties for X15, T10, N4, respectively, and G8 is the best strain in antibacterial performance. The metabolites of four endophytic fungi of ginkgo biloba were analysed by high performance liquid chromatography (HPLC), the results showed that quercetin and isorhamnetin were contained in the fermented liquid of Y6 strain, isorhamnetin and quercetin were contained in the fermented liquid of Y8 and Y10 respectively. Four strains were identified by molecular biology by extracting DNA, the result shows that Y6, Y8, Y10, G8 strains were Penicillium sp., Dothiorella gregaria., Phoma sp., Fusarium nematophilum. © Published under licence by IOP Publishing Ltd.

关键词： Strain

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Separating and Purifying of Endophytic Fungi from Ginkgo Biloba and Screening of Flavonoid-Producing Strains

Separating and Purifying of Endophytic Fungi from Ginkgo Bil...

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2019 International Conference on Civil engineering, Environment Resources and Energy Materials, CCESEM 2019

In order to screen the endophytic fungi of ginkgo biloba with high flavonoid yield, the surface of the sample was disinfected by immersing with 75% ethanol, 3% sodium hypochlorite and sterile water alternating. The endophytic fungi of ginkgo biloba were separated by tissue culture method. 47 strains of endophytic fungi were obtained, and 16, 17 and 14 strains were found in the branches, leaves and roots respectively. The flavonoid-producing strains and its content of total flavonoids in the fermentation broth were determined by chromogenic reaction and colorimetric method of aluminum chloride respectively. Finally, four strains with the highest flavonoid-producing (Y6, Y8, Y10 and G8) were screened, and theirs total flavonoids content in the fermentation broth were 25.33?1.29 mg/L, 32.04?1.38 mg/L, 20.48?0.83 mg/L and 20.19?1.59 mg/L respectively. © Published under licence by IOP Publishing Ltd.

关键词： Flavonoids

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Study on chemical properties of chestnut shell pigment

Study on chemical properties of chestnut shell pigment

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2019 International Conference on Civil engineering, Environment Resources and Energy Materials, CCESEM 2019

作者： Gao, Xiang Han, M.M. Zhang, X.Y. Cai, Z.Y. Wang, Fang Pang, M.X. Qi, J.H. Beijing Key Lab. of Agric. Product Detection and Control of Spoilage Organisms and Pesticide Residue BeijingUniversity of Agriculture Beijing102206 China Francethe Teaching Group of Food Chemistry Faculty of Food Science and Engineering Beijing University of Agriculture Beijing102206 China Beijing Innovation Consortium of Swine Researeh System Beijing102202 China Graduation Design of the Practical Training Program Cross-Cultivation of High-Level Talents in Beijing Colleges and Universities 2018 China

In this thesis, the chemical properties of chestnut shell pigments were mainly studied. Through a series of pigment stability experiments, it could be learned that the pigment of chestnut shell was sensitive to different pH and heat, stable to light, and had certain tolerance to oxidant H2O2 and reducing agent ascorbic acid. Mn2+ and Zn2+ had certain enhancement effects on color of the pigments. Cu2+, Fe2+, Fe3+ and Al3+ could destroy the stability of pigment, and caused precipitate. The pigment was also stable to the commonly used as food additives. © Published under licence by IOP Publishing Ltd.

关键词： Fruits

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Study on corruption bacteria in Beijing sausages

Study on corruption bacteria in Beijing sausages

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2019 International Conference on Civil engineering, Environment Resources and Energy Materials, CCESEM 2019

Low-temperature meat products are very popular, but due to the characteristics of processing technology, there are still some heat-resistant microorganism residues after sterilization, which lead to its extremely vulnerable to corruption and short shelf-life. The spoilage discipline and mechanisms of Beijing sausages were summarized on the basis of spoilage bacteria isolation, identification and analysis. The main results were as follows: by using method of 16S rDNA sequence analysis, the main spoilage bacteria which isolated and identified from Beijing sausages were Pseudomonas sp, Staphylococcus sp, and Brochothrix sp. By denaturing gradient gelelectrophoresis(PCR-DGGE) analysis, there were 13 kinds of the spoilage bacteria of Beijing sausages, and Pseudomonas sp was the main spoilage bacteria. © Published under licence by IOP Publishing Ltd.

关键词： Bacteria

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Synthesis of mercaptoethyl ester of palm fatty acid distillate: Effects of dehydration methods

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IOP Conference Series: Materials Science and engineering 2020年第1期823卷

作者： I Dewa Gede Arsa Putrawan Dicka Ar Rahim Andri Patuan Anggi Sitompul Salma Rifasari Wakana Research Group on Chemical Engineering Product Design & Development Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia. Research Group on Chemical Engineering Energy & Process System Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia. Study Program of Chemical Engineering Faculty of Industrial Technology Institut Teknologi Bandung Bandung Indonesia.

This research was aimed to evaluate the synthesis of mercaptoethyl ester of palm fatty acid distillate (PFAD) where water as a byproduct was removed by using vacuum distillation and azeotropic distillation. The reactions were done in a batch reactor using para-toluene sulfonic acid (pTSA) as a catalyst. The performances of the synthesis were evaluated by measuring the sulfhydryl content and yield of the product. Compared to dehydration by vacuum distillation, dehydration by azeotropic distillation gave lower sulfhydryl content and yield but faster reaction completion. Azeotropic distillation gave sulfhydryl content and yield in the range of 6–7% and 57–74%, respectively. Vacuum distillation gave sulfhydryl content and yield in the range of 7–9% and 75–85%, respectively.

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Amplification of Lipid Peroxidation by Regulating Cell Membrane Unsaturation To Enhance Chemodynamic Therapy

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Angewandte Chemie 2023年第12期135卷

作者： Yang Zhu Peng Gong Jun Wang Junjie Cheng Wenyu Wang Huilan Cai Rujiang Ao Hongwei Huang Meili Yu Prof. Lisen Lin Prof. Xiaoyuan Chen MOE Key Laboratory for Analytical Science of Food Safety and Biology Engineering Technology Research Center on Reagent and Instrument for Rapid Detection of Product Quality and Food Safety in Fujian Province College of Chemistry Fuzhou University Fuzhou 350108 China Departments of Diagnostic Radiology Surgery Chemical and Biomolecular Engineering and Biomedical Engineering Yong Loo Lin School of Medicine and College of Design and Engineering National University of Singapore Singapore 119074 Singapore Clinical Imaging Research Centre Centre for Translational Medicine Yong Loo Lin School of Medicine National University of Singapore Singapore 117599 Singapore Nanomedicine Translational Research Program Yong Loo Lin School of Medicine National University of Singapore Singapore 117597 Singapore Institute of Molecular and Cell Biology Agency for Science Technology and Research (A*STAR) 61 Biopolis Drive Proteos Singapore 138673 Singapore Contribution: Conceptualization (lead) Investigation (lead) Writing - original draft (lead) Contribution: Investigation (supporting) CAS Key Laboratory of Soft Matter Chemistry University of Science and Technology of China Hefei 230026 China Contribution: Conceptualization (supporting) Funding acquisition (lead) Supervision (equal) Contribution: Funding acquisition (supporting) Supervision (equal) Writing - review & editing (lead)

Lipid peroxidation (LPO) is one of the most damaging processes in chemodynamic therapy (CDT). Although it is well known that polyunsaturated fatty acids (PUFAs) are much more susceptible than saturated or monounsaturated ones to LPO, there is no study exploring the effect of cell membrane unsaturation degree on CDT. Here, we report a self-reinforcing CDT agent (denoted as OA@Fe-SAC@EM NPs), consisting of oleanolic acid (OA)-loaded iron single-atom catalyst (Fe-SAC)-embedded hollow carbon nanospheres encapsulated by an erythrocyte membrane (EM), which promotes LPO to improve chemodynamic efficacy via modulating the degree of membrane unsaturation. Upon uptake of OA@Fe-SAC@EM NPs by cancer cells, Fe-SAC-catalyzed conversion of endogenous hydrogen peroxide into hydroxyl radicals, in addition to initiating the chemodynamic therapeutic process, causes the dissociation of the EM shell and the ensuing release of OA that can enrich cellular membranes with PUFAs, enabling LPO amplification-enhanced CDT.

关键词： Antitumor Agents Chemodynamic Therapy Lipid Peroxidation Polyunsaturated Fatty Acids Single-Atom Catalysts

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BHEL Smart Wall Blowing System: New product Development in Manufacturing Industry

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Vikalpa 2021年第4期45卷 240 - 249页

作者： Abhishek Kumar R. Dhanuskodi R. Kaliappan K. Nandakumar Abhishek Kumar teaches design philosophies at Anant National University Ahmedabad. He earned his Ph.D in Management from Pondicherry University. He is an Economics graduate from Calcutta University and MBA from BIM Trichy. He has published more than 20 articles in reputed international journals has authored two books written articles and columns for newspapers and is quoted on issues related to leadership and marketing by various media platforms. His research work comprises construction of brand personality scale for media aesthetics and phenomenological design. His recent publications are on philosophy of a photograph hermeneutic reality of product and on philosophy of intimate spaces. R. Dhanuskodi has nearly 40 years of R&D experience at BHEL India in technical areas applicable for thermal power plants. He is a life member of The Institution of Engineers (India) and The Combustion Institute. He has won two BHEL’s Excel awards under the best author category for technical papers. He has visited France Netherlands and Germany under Indo-Europe Clean Coal Development Program. He has guided 42 UG PG and PhD project works. He holds 11 patents 40 copyrights and 2 design registrations. He has presented papers in 20 conferences and published in 10 national and international journals. R. Kaliappan completed his bachelors in electrical and electronics engineering and Masters in Computer Science. He has 36 years of research experience in different fields of power generation and power plant subsystems such as heat transfer studies on boiler circulation efficiency improvements of boiler subsystems product improvements/ enhancements and setting up test facilities for research studies. He has published a number of technical papers on MHD power generation and heat transfer studies in various national and international journals. He has more than 25 patents and copyrights on products development related to power boilers. He has won BHEL’S gold medal for product development for Smart Wall Blowing system. K. Nandakumar

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