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

Frontiers of Structural and Civil Engineering 2018年第4期12卷 490-503页

作者： t.chandra sekhara reddy Civil Engineering G.P.R.Engineering CollegeKurnool 518002Andhra PradeshIndia

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.

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

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Improvising the Self-Healing Capabilities of Concrete Using Different Pozzolanic Materials and Crystalline Admixtures

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Journal of Wuhan University of technology(Materials Science) 2022年第3期37卷 429-439页

作者： A Ravitheja t chandra sekhara reddy C Sashidhar SVR Engineering College AyyalurNandyalKurnoolAndhra PradeshIndia Civil Engineering G Pulla Reddy Engineering CollegeKurnoolAPIndia Jawaharlal Nehru technological University AnantapurIndia

to analyse the self-healing capacities in terms of mechanical performance of the pozzolanic materials,such as,fly ash,metakaolin and silica fume and crystalline ***-cracked concrete cubes with about 0.05 mm width were exposed to four different environmental conditions at different exposure times in order to determine the effect of temperature and water availability on the self-healing *** the exposure,the control and tested concrete cubes were evaluated for regained strength,void reduction,corrosion inhibition,damp proofing,relative impermeability and *** samples with SF10CA have better cementitious filling and low percentage of voids and water absorption.

关键词： crystalline admixtures pozzolanic materials self-healing

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Self-Healing Concrete with Crystalline Admixture——A Review

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Journal of Wuhan University of technology(Materials Science) 2019年第5期34卷 1143-1154页

作者： A Ravitheja Dr t chandra sekhara reddy Dr C Sashidhar JNtU College of Engineering AnantapurAPIndia Civil Engineering GPR Engineering CollegeKurnoolAPIndia Civil Engineering JNTU College of EngineeringAnantapurAPIndia

the scope of the present paper is to understand the effects of crystalline admixture on the selfhealing capacity of the cementitious composites. Previous studies were examined and a conclusion was drawn to the effect that different additives to crystalline admixture tend to improve self-healing of concrete for larger cracks. It is recommended that initial treatment with chemical admixture can stimulate and heal further cracks and it has the better repeatability trend in mixing with the concretes and mechanical recovery is possible even under repetitive preloading. Effective self-healing with chemical admixtures even under open-air exposure, leads to study the importance of a service ability design parameter including the maximum allowable crack width by repeatability analysis as a function of the exposure with the concept of sealable crack width.

关键词： crystalline admixture permeability reducer admixture cracking

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Poly(amaranth) film based sensor for resolution of dopamine in the presence of uric acid:A voltammetric study

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Chinese Chemical Letters 2010年第12期21卷 1490-1492页

作者： Umesh chandra B.E.Kumara Swamy Ongera Gilbert M.Pandurangachar Sathish reddy S.Sharath Shankar B.S.Sherigara Department of P.G.Studies and Research in Industrial Chemistry Kuvempu UniversityJnana SahyadriShankaraghattaShimoga 577 451KarnatakaIndia Department of Chemistry SSMRV Degree CollegeJayanagara 4T BlockBanglore 41KarnatakaIndia

the electropolymerized film of amaranth was prepared on the surface of graphite pencil electrode（GPE） using cyclic voltammetric *** poly（amaranth） film coated electrode exhibited an excellent electrocatalytic activity towards the detection of dopamine（DA） in the presence of uric acid（UA） in 0.2 mol/L phosphate buffer solution at pH *** effect of interference study was carried out using differential pulse voltammetric *** poly（amaranth） modified GPE was applied for the detection of DA in dopamine injection with satisfactory results.

关键词： Poly(amaranth) Graphite pencil electrode Dopamine Uric acid Sensor

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In-Field Management Practices for Mitigating Soil CO2and CH4Fluxes under Corn (Zea mays) Production System in Middle tennessee

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American Journal of Climate Change 2015年第4期4卷 367-378页

作者： Sam Dennis Qi Deng Dafeng Hui Junming Wang Stephen Iwuozo Chih-Li Yu chandra reddy College of Agriculture Human and Natural Sciences Tennessee State University Nashville TN USA Climate and Atmospheric Science Section Illinois State Water Survey Prairie Research Institute University of Illinois at Urbana-Champaign Champaign IL USA

the United States continues to be the largest corn producer in the world. How to maximize corn yield and at the same time reduce greenhouse gas emissions, is becoming a challenging effort for growers and researchers. As a result, our understanding of the responses of soil CO2 and CH4 fluxes to agricultural practices in cornfields is still limited. We conducted a 3-yr cornfield experiment to study the responses of soil CO2 and CH4 fluxes to various agricultural practices in middle tennessee. the agricultural practices included no-tillage + regular applications of urea ammonium nitrate (Nt-URAN);no-tillage + regular applications of URAN + denitrification inhibitor (Nt-inhi- bitor);no-tillage + regular applications of URAN + biochar (Nt-biochar);no-tillage + 20% applications of URAN + chicken litter (Nt-litter);no-tillage + split applications of URAN (Nt-split);and conventional tillage + regular applications of URAN as a control (Ct-URAN). A randomized complete block design was used with six replications. the same amount of fertilizer equivalent to 217 kg·N·ha-1 was applied to all of the experimental plots. the results showed that improved fertilizer and soil management, except the Nt-biochar treatment significantly increased soil CO2 flux as compared to the conventional tillage (Ct-URAN, 487.05 mg CO2 m-2·h-1). Soil CO2 flux increased exponentially with soil temperature (t 2 flux tended to be positively related to corn yield and/or soil moisture. Soil CH4 flux increased linearly with soil moisture in all treatments. Improved fertilizer and soil management did not alter soil CH4 flux, but significantly affected its moisture sensitivity. Our results indicated that agricultural practices enhancing corn yield may also result in a net increase in carbon emissions from soil, hence reducing the potential of carbon sequestration in croplands.

关键词： tillage Fertilizer Management Soil CO2 Flux Soil CH4 Flux Greenhouse Gases

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Determination of Dopamine in Presence of Uric Acid at Poly (Eriochrome Black t) Film Modified Graphite Pencil Electrode

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American Journal of Analytical Chemistry 2011年第2期2卷 262-269页

作者： Umesh chandra B. E. Kumara Swamy Ongera Gilbert Sathish reddy B. S. Sherigara 不详

A simple commercial graphite pencil electrode was used to investigate the electrochemical oxidation of dopamine. the electropolymerised film of eriochrome black t was prepared on the surface of graphite pencil electrode by using cyclic voltammetry technique. the prepared electrode exhibits an excellent electrocatalytical activity towards the determination of dopamine. the effects of concentration, pH and scan rate were investigated. Simultaneous detection of dopamine and uric acid was investigated by using both cyclic voltammetric and differential pulse voltammetry technique. the modified electrode was also used for the detection of dopamine in injection.

关键词： Poly (Eriochrome Black t) Graphite Pencil Electrode Dopamine Uric Acid Cyclic Voltammetry Differential Pulse Voltammetry

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