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Sumit Chakraborty - One of the best experts on this subject based on the ideXlab platform.
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effectiveness of the surface modified Jute Fibre as Fibre reinforcement in controlling the physical and mechanical properties of concrete paver blocks
Construction and Building Materials, 2018Co-Authors: Sarada Prasad Kundu, Sumit Chakraborty, Subrata ChakrabortyAbstract:Abstract Concrete reinforced with natural Fibres is considered to be an effective scheme nowadays to fulfill the global demand for sustainable infrastructures development. The present article investigates the salient features of concrete paver blocks fabricated using mild alkali, dilute polymer emulsion, and tannin modified natural Jute Fibre as Fibre reinforcement. Initially, the chopped Jute Fibres (3–5 mm) were modified using sodium hydroxide, dilute carboxylated styrene butadiene, and tannin, followed by fabricating and characterizing the concrete paver blocks. Analyzing the physico-mechanical properties, it is demonstrated that the paver blocks containing 1 wt% modified Jute Fibre (with respect to weight of cement) show 30%, 49% and 166% higher compressive strength, flexural strength, and flexural toughness, respectively, as compared to that of the reference blocks. Finally, based on the Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, and microstructure analysis, the compatibility of reinforcing Fibre with matrix phases was established. The use of modified chopped Jute Fibre as Fibre reinforcement is found to be very effective to improve the mechanical properties and the long-lasting-life of paver blocks that may lead to minimizing the maintenance cost as well.
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effectiveness of the mild alkali and dilute polymer modification in controlling the durability of Jute Fibre in alkaline cement medium
Construction and Building Materials, 2018Co-Authors: Sarada Prasad Kundu, Sumit Chakraborty, S B Majumder, Basudam AdhikariAbstract:Abstract With the aim to improve the durability of natural Fibres used as Fibre reinforcement in the cement matrix, the combined alkali and polymer modification would be a unique approach. The present investigation deals with the durability performances of the unmodified and combined mild alkali and polymer emulsion modified Jute Fibres exposed to alkaline medium and cement medium as well. Initially, the Jute Fibres were modified using mild alkali (0.5% NaOH, 24 h) and dilute polymer emulsion (0.125% carboxylated styrene butadiene rubber (SBR)) sequentially. Afterward, the unmodified and modified Jute Fibres were then exposed to the saturated lime solution, 0.1 N NaOH solution, and cement paste for 360 days. After periodic exposure in different media, the Fibres were removed and tested. Based on the results, it is demonstrated that the combined alkali and polymer modified Jute Fibre retains 17, 19 and 20% more tensile strength as compared to that of the raw Jute Fibre after 360 days exposure in saturated lime solution, NaOH solution, and cement paste, respectively. The improved durability of the combined alkali and polymer modified Jute appears to be due to the reduction of Fibre mineralization by forming a protective coating of polymer on the Fibre surface as demonstrated by elemental analysis, FTIR, XRD, NMR, SEM in conjugation with EDS.
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efficacy of alkali treated Jute as Fibre reinforcement in enhancing the mechanical properties of cement mortar
Materials and Structures, 2016Co-Authors: Byungwan Jo, Sumit ChakrabortyAbstract:Present investigation deals with the effectiveness of alkali-treated Jute Fibre reinforcement on the physical characteristics and mechanical properties of cementitious composites. The use of alkali-treated Jute Fibre as Fibre reinforcement in cement composites leads to the enhancement of the compressive strength as well as flexural properties compared to that of the raw Jute reinforced mortar as well as the control mortar counterpart. In this investigation, the compressive and flexural strengths of the control cement mortar (cured for 90 days) are measured to be 34.5 and 7.4 MPa, respectively. Whilst, the compressive and flexural strengths of the alkali-treated Jute Fibre reinforced cement mortar (cured for 90 days) are measured to be 36.2 and 10.4 MPa, respectively. Additionally, based on the analyses of the bending properties, it is assessed that the fracture toughness, toughness indices and post-cracking resistance energy of alkali-treated Jute Fibre reinforced mortar are improved by 1.5, 0.6 and 22.5 times, respectively, as compared to that of the control mortar. Whereas, the above properties of raw Jute Fibre reinforced mortar samples are improved by 1.4, 0.5 and 20.4 times, respectively, as compared to that of the control mortar counterpart. Finally, a model has been proposed to explain the overall performance of the alkali-treated Jute Fibre reinforced cement composites.
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hydration study of the polymer modified Jute Fibre reinforced cement paste using analytical techniques
Construction and Building Materials, 2015Co-Authors: Byungwan Jo, Sumit ChakrabortyAbstract:Abstract The paper deals with the hydration behaviour of the polymer modified Jute Fibre reinforced cement paste. In this investigation, different polymer contents in the emulsion (i.e., 0.0257%, 0.0513%, 0.1025% and 0.2050%) were used to prepare the polymer modified Jute Fibre reinforced cement paste. The hydration characteristic of the cement samples was assessed by monitoring the extent of hydrated cement product. Based on the X-ray diffraction, Fourier transform infrared spectroscopy, differential scanning calorimetry and thermogravimetry analysis of the hydrated cement samples, it is revealed that the polymer modified (0.0513%) Jute Fibre reinforced cement sample produces a greater extent of hydrated cement product as compared to that of the unmodified Fibre reinforced cement sample. Therefore, it is demonstrated that the unmodified Jute Fibre delays the cement hydration reaction, whilst, the use of an optimum polymer content in the emulsion (0.0513%) recovers the hydration delaying action of Jute Fibre. Finally, a model has been proposed to explain the overall performances of the polymer modified Jute Fibre reinforced cement paste.
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A mild alkali treated Jute Fibre controlling the hydration behaviour of greener cement paste
Scientific Reports, 2015Co-Authors: Byungwan Jo, Sumit ChakrabortyAbstract:To reduce the antagonistic effect of Jute Fibre on the setting and hydration of Jute reinforced cement, modified Jute Fibre reinforcement would be a unique approach. The present investigation deals with the effectiveness of mild alkali treated (0.5%) Jute Fibre on the setting and hydration behaviour of cement. Setting time measurement, hydration test and analytical characterizations of the hardened samples (viz., FTIR, XRD, DSC, TGA and free lime estimation) were used to evaluate the effect of alkali treated Jute Fibre. From the hydration test, the time (t) required to reach maximum temperature for the hydration of control cement sample is estimated to be 860 min, whilst the time (t) is measured to be 1040 min for the hydration of a raw Jute reinforced cement sample. However, the time (t) is estimated to be 1020 min for the hydration of an alkali treated Jute reinforced cement sample. Additionally, from the analytical characterizations, it is determined that Fibre-cement compatibility is increased and hydration delaying effect is minimized by using alkali treated Jute Fibre as Fibre reinforcement. Based on the analyses, a model has been proposed to explain the setting and hydration behaviour of alkali treated Jute Fibre reinforced cement composite.
Sarada Prasad Kundu - One of the best experts on this subject based on the ideXlab platform.
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effectiveness of the surface modified Jute Fibre as Fibre reinforcement in controlling the physical and mechanical properties of concrete paver blocks
Construction and Building Materials, 2018Co-Authors: Sarada Prasad Kundu, Sumit Chakraborty, Subrata ChakrabortyAbstract:Abstract Concrete reinforced with natural Fibres is considered to be an effective scheme nowadays to fulfill the global demand for sustainable infrastructures development. The present article investigates the salient features of concrete paver blocks fabricated using mild alkali, dilute polymer emulsion, and tannin modified natural Jute Fibre as Fibre reinforcement. Initially, the chopped Jute Fibres (3–5 mm) were modified using sodium hydroxide, dilute carboxylated styrene butadiene, and tannin, followed by fabricating and characterizing the concrete paver blocks. Analyzing the physico-mechanical properties, it is demonstrated that the paver blocks containing 1 wt% modified Jute Fibre (with respect to weight of cement) show 30%, 49% and 166% higher compressive strength, flexural strength, and flexural toughness, respectively, as compared to that of the reference blocks. Finally, based on the Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, and microstructure analysis, the compatibility of reinforcing Fibre with matrix phases was established. The use of modified chopped Jute Fibre as Fibre reinforcement is found to be very effective to improve the mechanical properties and the long-lasting-life of paver blocks that may lead to minimizing the maintenance cost as well.
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effectiveness of the mild alkali and dilute polymer modification in controlling the durability of Jute Fibre in alkaline cement medium
Construction and Building Materials, 2018Co-Authors: Sarada Prasad Kundu, Sumit Chakraborty, S B Majumder, Basudam AdhikariAbstract:Abstract With the aim to improve the durability of natural Fibres used as Fibre reinforcement in the cement matrix, the combined alkali and polymer modification would be a unique approach. The present investigation deals with the durability performances of the unmodified and combined mild alkali and polymer emulsion modified Jute Fibres exposed to alkaline medium and cement medium as well. Initially, the Jute Fibres were modified using mild alkali (0.5% NaOH, 24 h) and dilute polymer emulsion (0.125% carboxylated styrene butadiene rubber (SBR)) sequentially. Afterward, the unmodified and modified Jute Fibres were then exposed to the saturated lime solution, 0.1 N NaOH solution, and cement paste for 360 days. After periodic exposure in different media, the Fibres were removed and tested. Based on the results, it is demonstrated that the combined alkali and polymer modified Jute Fibre retains 17, 19 and 20% more tensile strength as compared to that of the raw Jute Fibre after 360 days exposure in saturated lime solution, NaOH solution, and cement paste, respectively. The improved durability of the combined alkali and polymer modified Jute appears to be due to the reduction of Fibre mineralization by forming a protective coating of polymer on the Fibre surface as demonstrated by elemental analysis, FTIR, XRD, NMR, SEM in conjugation with EDS.
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polymer modified Jute Fibre as reinforcing agent controlling the physical and mechanical characteristics of cement mortar
Construction and Building Materials, 2013Co-Authors: Sumit Chakraborty, Sarada Prasad Kundu, Basudam Adhikari, S B MajumderAbstract:Abstract Polymer modified alkali treated Jute Fibre as a reinforcing agent, substantially improves the physical and mechanical properties of cement mortar with a mix design cement:sand:Fibre:water::1:3:0.01:0.6. The workability of the mortar is found to increase systematically from 155 ± 5 mm (control mortar) to 167 ± 8 mm (0.2050% polymer modified mortar). The density of the mortar is increased from 2092 kg/m 3 to 2136 kg/m 3 with a concomitant reduction of both water absorption and apparent porosity. Optimal polymer content in emulsion (0.0513%) is found to increase the compressive strength, modulus of rupture and flexural toughness 25%, 28%, 387% respectively as compared to control mortar. Based on the X-ray diffraction and infra-red spectroscopy analyses of the mortar samples a plausible mechanism of the effect of modified Jute Fibre controlling the physical and mechanical properties of cement mortar has been proposed.
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improvement of the mechanical properties of Jute Fibre reinforced cement mortar a statistical approach
Construction and Building Materials, 2013Co-Authors: Sumit Chakraborty, Sarada Prasad Kundu, Ratan Kumar Basak, Basudam Adhikari, S B MajumderAbstract:Abstract We have demonstrated that the physical characteristics and mechanical properties of cement mortar are significantly improved by the Jute Fibre reinforcement. Three different processes methodologies were adopted to mix the Jute Fibre homogeneously in the mortar matrix. By optimising the processing conditions and Fibre loading; the cold crushing strength and flexural strength, flexural toughness and the toughness index of the mortar has significantly been increased. Based on the Fourier transformed infrared spectroscopy and thermo-gravimetric analyses a plausible mechanism of the effect of Jute reinforcement controlling the physical and mechanical properties of cement mortar have been proposed.
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chemically modified Jute Fibre reinforced non pressure np concrete pipes with improved mechanical properties
Construction and Building Materials, 2012Co-Authors: Sarada Prasad Kundu, Sumit Chakraborty, Basudam Adhikari, S B MajumderAbstract:Abstract To improve the load bearing capacity of underground sewage pipe, we have formulated a concrete mix using chemically-modified Jute Fibre (reinforcing agent), polymer latex (surface modifier both for Fibre and matrix) and tannin (water reducing admixture). As compared to commercial non-pressure grade pipes (NP3 type), significant strength improvement, under three-edge-bearing test (∼129.4%), is achieved in the pipes made using the modified concrete mix. NP3 pipes made using this modified concrete exhibit similar mechanical properties to that of NP4 pipes resulting an effective reduction of 31.6 wt% of steel used for reinforcement in NP4 pipes.
Jianyong Yu - One of the best experts on this subject based on the ideXlab platform.
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mechanical modification of degummed Jute Fibre for high value textile end uses
Industrial Crops and Products, 2010Co-Authors: Qianli Wang, Jianyong Yu, Longdi ChengAbstract:Abstract The effects of pretreatment and mechanical modification on characteristics of Jute Fibre were evaluated in this paper. The experimental results show that pretreatments and mechanical modifications both have obvious effects on the characteristics of Jute Fibre. The blended agent used for pretreatment can form a thin film on the surface of Jute Fibre to make it smoother, so the Fibre can be refined by further mechanical modification. Regarding the four process routes used for mechanical modification discussed in this study, the process of draft-cutting and speedily carding can produce Jute Fibre with finer diameter, lower average length, higher percentage of short Fibre, and lower tenacity. The Jute Fibre pretreated with blended agent and mechanically modified by Process I has linear density of 16.1 dtex, average length of 35.2 mm, and tenacity of 3.4 cN/dtex, indicating that it is available for high value textile end uses.
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mechanical properties of poly butylene succinate pbs biocomposites reinforced with surface modified Jute Fibre
Composites Part A-applied Science and Manufacturing, 2009Co-Authors: Jianyong Yu, Longdi Cheng, Weiwei QuAbstract:Abstract A biocomposite was originally fabricated with biodegradable polymer PBS and Jute Fibre, and the effects of Fibre surface modification on characteristics of Jute Fibre and mechanical properties of the biocomposite were evaluated in this paper. The experimental results show that surface modification can remove surface impurities and reduce diameter of Jute Fibres. Regarding the mechanical properties of biocomposites, it is observed that the biocomposites with Jute Fibres treated by 2% NaOH, 2 + 5% NaOH or coupling agent, respectively, an optimum in mechanical properties can obtain at Fibre content of 20 wt.%, which exhibit an obvious enhancement in mechanical strength and modulus compared to the ones with untreated Jute Fibre. Furthermore, surface modification also exhibits less effects on flexural properties compared to tensile properties and more on flexural or tensile modulus than on the strength.
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biodegradability of poly butylene succinate pbs composite reinforced with Jute Fibre
Polymer Degradation and Stability, 2009Co-Authors: Jianyong Yu, Longdi Cheng, Xiaojie YangAbstract:Abstract Poly(butylene succinate) (PBS)/Jute composites were prepared, and the effects of Fibre content, diameter, surface modification and arrangement forms on the biodegradability were evaluated by compost-soil burial test. The weight losses of PBS/Jute composites are higher than that of pure PBS film and bulk Jute Fibre, and decreased with increasing Fibre content. The weight loss of PBS/10% Jute composite after 180 days is 62.5%. In the case of the effect of Fibre diameter, the weight loss is found to decrease with decreasing Fibre diameter. For the effect of Fibre surface modification, the order of higher weight loss is PBS/untreated Jute > PBS/alkali treated Jute > PBS/coupling agent treated Jute. Furthermore, the composite of PBS/woven fabric has the highest weigh loss, followed by that of PBS/nonwoven fabric and PBS/bulk Jute Fibre, respectively.
Ashis Kumar Samanta - One of the best experts on this subject based on the ideXlab platform.
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effect of bio friendly conditioning agents on Jute Fibre spinning
Industrial Crops and Products, 2009Co-Authors: Gautam Basu, S S De, Ashis Kumar SamantaAbstract:Abstract From early times, Jute Fibre has been generally conditioned for easy spinning by adding oil and water in the form of an emulsion. The commonly used oil consists of C 12 –C 31 fractions of mineral oil that sometimes impart different intensities of oily (kerosene) or fishy smell to the end product. In the present work, efforts have been made to find a suitable sustainable substitute of mineral oil based conditioning agent for spinning of Jute yarn and for this, three types of vegetable oil (rice bran oil, palmolein oil and castor oil), a silicone emulsion, a mixed enzyme system and glycerine have been used separately or in combinations as conditioning agents for Jute Fibre before its mechanical processing for making yarn in Jute spinning machines. Considering comparable mechanical process performance for spinning of Jute Fibre ( viz. , Fibre loss as droppings during processing, moisture retention prior to spinning stage and spinning end breakage rate), tensile properties of yarn, and lower yarn hairiness, it may be suggested to use 2.5% castor oil alone, or 2% castor oil in combination with 0.1–0.5% glycerine in the form of oil-in-water emulsion as the most suitable alternatives to conventional mineral oil-based Jute conditioning agent to spin ordinary Jute yarn.
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effects of glycol and acrylamide treatments on textile related properties of Jute Fibre
Journal of Natural Fibers, 2008Co-Authors: Ashis Kumar Samanta, Gautam Basu, Premamoy GhoshAbstract:ABSTRACT Changes in textile related properties of Jute Fibre subjected to (a) limited oxidation using K2S2O8 or NaIO4 and subsequently to (b) treatment with monomeric/oligomeric glycols or acrylamide under specified condition were studied. Comparison of observed effects indicated that presoaking of Jute Fibre at room temperature with 0.5% aqueous K2S2O8 followed by an exposure to U-V light for 15 min and subsequent treatment with (i) 8% ethylene glycol, (ii) 8% acrylamide and (iii) a mixture of 4% polyethylene glycol of molecular weight 1500(i.e. PEG 1500) and 4% acrylamide produced mentionworthy improvement in textile related properties in respect of weight gain, moisture absorption, linear density, tenacity retention, coefficient of friction, flexural rigidity, surface reflectance, whiteness index, yellowness index and brightness index. Treatment of oxy-Jute (K2S2O8 –treated) Fibre by 1:1 mixture of acrylamide and PEG under the prescribed optimal condition appears to produce the most encouraging results...
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effect of glycol and acrylamide treatments of Jute Fibre on its processibility
Journal of Natural Fibers, 2008Co-Authors: Gautam Basu, Ashis Kumar Samanta, Premamoy GhoshAbstract:ABSTRACT Changes in textile-related properties of Jute Fibre subjected to (a) controlled/limited oxidation using K2S2O8 and/or NaIO4 and subsequently to (b) treatment with monomeric/oligomeric glycols and with acrylamide under specified condition were studied and reported in our earlier communication. In the present part of the work, the process performances of the chemically modified Jute Fibres obtained from the above mentioned treatments were further studied to assess their process performance during yarn making, including spinnability and property performance of the resultant yarns. Studies on process performance for yarn making, including spinnability, indicate that the specified treatment with a mixture of 4% PEG 1500 and 4% acrylamide and also with 8% ethylene glycol on Jute Fibre presoaked with 0.5% K2S2O8 produced a better process performance, showing net advantages in respect of (1) improved energy efficiency and lower Fibre droppage during carding, (2) trouble free spinning (zero to low-end bre...
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Enzyme and silicone treatments on Jute Fibre. Part I: Effect on textile-related properties
Journal of The Textile Institute, 2008Co-Authors: Ashis Kumar Samanta, Gautam Basu, Premamoy GhoshAbstract:Abstract The present study relates to broad-based assessment of softening of raw Jute and selectively pretreated Jute Fibres under the action of mixed enzymes (cellulase, xylanase and pectinase) and a textile grade aminosilicone softener and to further assess how such selective treatments finally contribute in enhancing some textile-related properties. Application of 4% mixed enzyme on Jute Fibre at 55°C for 2 h at pH 4.8 offers much finer, softer, cleaner and brighter Jute Fibre with some lowering of bundle tenacity. However, pretreatment of Jute Fibre under combined oxidative action of 3% H2O2 and 0.75% K2S2O8 for 2 h at 30°C (pH 11) followed by subsequent treatment with 1% mixed enzyme offers a better balance of textile-related properties covering moisture regain, fineness, bundle tenacity, flexural rigidity, surface reflectance, whiteness index, yellowness index and brightness index. Treatments of Jute Fibre with 0.5–1% aminosilicone softener under a specified condition also make Jute Fibre much softe...
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Effect of glycol and acrylamide treatments of Jute Fibre on its processibility
Journal of Natural Fibers, 2008Co-Authors: Gautam Basu, Ashis Kumar Samanta, Premamoy GhoshAbstract:Changes in textile related properties of Jute Fibre subjected to (a) limited oxidation using K 2 S 2 O 8 or NaIO 4 and subsequently to (b) treatment with monomeric/ oligomeric glycols or acrylamide under specified condition were studied. Comparison of observed effects indicated that presoaking of Jute Fibre at room temperature with 0.5% aqueous K 2 S 2 O 8 followed by an exposure to U-V light for 15 min and subsequent treatment with (i) 8% ethylene glycol, (ii) 8% acrylamide and (iii) a mixture of 4% polyethylene glycol of molecular weight 1500(i.e. PEG 1500) and 4% acrylamide produced mentionworthy improvement in textile related properties in respect of weight gain, moisture absorption, linear density, tenacity retention, coefficient of friction, flexural rigidity, surface reflectance, whiteness index, yellowness index and brightness index. Treatment of oxy-Jute (K 2 S 2 O 8 -treated) Fibre by 1:1 mixture of acrylamide and PEG under the prescribed optimal condition appears to produce the most encouraging results as far as tenacity retention, surface appeance and colour parameters including brightness and surface reflectance of Jute Fibre are concerned. © 2007 by The Haworth Press, Inc. All rights reserved.
S B Majumder - One of the best experts on this subject based on the ideXlab platform.
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effectiveness of the mild alkali and dilute polymer modification in controlling the durability of Jute Fibre in alkaline cement medium
Construction and Building Materials, 2018Co-Authors: Sarada Prasad Kundu, Sumit Chakraborty, S B Majumder, Basudam AdhikariAbstract:Abstract With the aim to improve the durability of natural Fibres used as Fibre reinforcement in the cement matrix, the combined alkali and polymer modification would be a unique approach. The present investigation deals with the durability performances of the unmodified and combined mild alkali and polymer emulsion modified Jute Fibres exposed to alkaline medium and cement medium as well. Initially, the Jute Fibres were modified using mild alkali (0.5% NaOH, 24 h) and dilute polymer emulsion (0.125% carboxylated styrene butadiene rubber (SBR)) sequentially. Afterward, the unmodified and modified Jute Fibres were then exposed to the saturated lime solution, 0.1 N NaOH solution, and cement paste for 360 days. After periodic exposure in different media, the Fibres were removed and tested. Based on the results, it is demonstrated that the combined alkali and polymer modified Jute Fibre retains 17, 19 and 20% more tensile strength as compared to that of the raw Jute Fibre after 360 days exposure in saturated lime solution, NaOH solution, and cement paste, respectively. The improved durability of the combined alkali and polymer modified Jute appears to be due to the reduction of Fibre mineralization by forming a protective coating of polymer on the Fibre surface as demonstrated by elemental analysis, FTIR, XRD, NMR, SEM in conjugation with EDS.
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polymer modified Jute Fibre as reinforcing agent controlling the physical and mechanical characteristics of cement mortar
Construction and Building Materials, 2013Co-Authors: Sumit Chakraborty, Sarada Prasad Kundu, Basudam Adhikari, S B MajumderAbstract:Abstract Polymer modified alkali treated Jute Fibre as a reinforcing agent, substantially improves the physical and mechanical properties of cement mortar with a mix design cement:sand:Fibre:water::1:3:0.01:0.6. The workability of the mortar is found to increase systematically from 155 ± 5 mm (control mortar) to 167 ± 8 mm (0.2050% polymer modified mortar). The density of the mortar is increased from 2092 kg/m 3 to 2136 kg/m 3 with a concomitant reduction of both water absorption and apparent porosity. Optimal polymer content in emulsion (0.0513%) is found to increase the compressive strength, modulus of rupture and flexural toughness 25%, 28%, 387% respectively as compared to control mortar. Based on the X-ray diffraction and infra-red spectroscopy analyses of the mortar samples a plausible mechanism of the effect of modified Jute Fibre controlling the physical and mechanical properties of cement mortar has been proposed.
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improvement of the mechanical properties of Jute Fibre reinforced cement mortar a statistical approach
Construction and Building Materials, 2013Co-Authors: Sumit Chakraborty, Sarada Prasad Kundu, Ratan Kumar Basak, Basudam Adhikari, S B MajumderAbstract:Abstract We have demonstrated that the physical characteristics and mechanical properties of cement mortar are significantly improved by the Jute Fibre reinforcement. Three different processes methodologies were adopted to mix the Jute Fibre homogeneously in the mortar matrix. By optimising the processing conditions and Fibre loading; the cold crushing strength and flexural strength, flexural toughness and the toughness index of the mortar has significantly been increased. Based on the Fourier transformed infrared spectroscopy and thermo-gravimetric analyses a plausible mechanism of the effect of Jute reinforcement controlling the physical and mechanical properties of cement mortar have been proposed.
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chemically modified Jute Fibre reinforced non pressure np concrete pipes with improved mechanical properties
Construction and Building Materials, 2012Co-Authors: Sarada Prasad Kundu, Sumit Chakraborty, Basudam Adhikari, S B MajumderAbstract:Abstract To improve the load bearing capacity of underground sewage pipe, we have formulated a concrete mix using chemically-modified Jute Fibre (reinforcing agent), polymer latex (surface modifier both for Fibre and matrix) and tannin (water reducing admixture). As compared to commercial non-pressure grade pipes (NP3 type), significant strength improvement, under three-edge-bearing test (∼129.4%), is achieved in the pipes made using the modified concrete mix. NP3 pipes made using this modified concrete exhibit similar mechanical properties to that of NP4 pipes resulting an effective reduction of 31.6 wt% of steel used for reinforcement in NP4 pipes.
