International Journal of Innovative Research in Science, Engineering and Technology, 2013
In the present study an attempt has been made to understand the influence of fly ash on the growt... more In the present study an attempt has been made to understand the influence of fly ash on the growth of different plant species. In this regard a medium has been prepared using 1:1 soil: fly ash for conducting the study. The result obtained is compiled with different correlation methods. The plant species used in this study includes both aquatic and aromatic plants. During the study an attempt has been made to monitor the effect of fly ash on the growth of plants species in addition, study has been made to estimate the capacity of these plant species to absorb heavy metal.
Iranian Journal of Materials Science and Engineering, Dec 10, 2020
The field of nanomaterials has greatly advanced in the last decade following a wide range of appl... more The field of nanomaterials has greatly advanced in the last decade following a wide range of applications in the fields of electronics, automobiles, construction, and healthcare. Synthesis of the nanomaterials plays a crucial role in redefining the current engineering and science field. At the same time, procuring an environment-friendly end product through eco-friendly solutions and sustainable processes is the key to many global problems. Green synthesis of nanomaterials like graphene and its derivatives involves mild reaction conditions and nontoxic precursors because it is simple, cost-effective, relatively reproducible, and often results in more stable materials. This paper primarily focuses on the green synthesis of graphene and its derivatives (graphene oxide & reduced graphene oxide) and geopolymers; a green technology for preparing graphene reinforced geopolymer composites. Various methods used globally for green synthesis of graphene and geopolymer are briefly discussed and this paper tries to integrate these two areas for a green end product. Preparation techniques and possible applications of these green composites are also discussed to provide insights on the current growth and developments.
Abstract Sustainable use of industrial wastes for the production of new age eco-friendly construc... more Abstract Sustainable use of industrial wastes for the production of new age eco-friendly construction materials can effectively solve the growing environmental concern over landfills and also provide an integrative industrial waste management strategy. Geopolymers are comparatively a new class of aluminosilicate inorganic polymer which has gained wide recognition due to its remarkable physicochemical and mechanical properties. Various industrial wastes such as fly ash, slag, rice husk ash, ferrochrome ash, etc. rich in alumina and silica can serve as suitable precursors for the production of geopolymer binders. This paper presents the experimental investigations on the utilization of ferrochrome ash (FCA), and waste from the ferrochrome industry as a primary precursor having considerable amounts of alumina, silica, magnesium oxide, potassium oxide for preparation of geopolymer concrete having partial replacements of ground granulated blast furnace slag and lime. The fresh and hardened geopolymer concrete properties: workability and compressive strength are thoroughly investigated. The particle size distribution, the chemical composition, mineralogy, microstructure of binder particles were analysed with advanced analytical techniques such as XRF, PSA, XRD, SEM/EDS. The results of this study not only suggest the effective utilization of ferrochrome ash for the synthesis of a new class of geopolymer binders but also provide a sustainable route for the management of ferrochrome waste currently generated in various countries worldwide.
In this paper, two types of lightweight fly ash (FA) aggregates: cold bonded fly ash (CFA) and si... more In this paper, two types of lightweight fly ash (FA) aggregates: cold bonded fly ash (CFA) and sintered fly ash (SFA) aggregates were prepared through the cold bonding and sintering method. During the pelletization process, different ratios of binders to fly ash were used, i.e., 10:90, 15:85, 17:83, and 20:80 with a set amount of water. Cement, metakaolin, sodium silicate, urea-formaldehyde resin, bentonite powder, and phenol-formaldehyde resin were employed as binders. A comparative study on physicochemical, mechanical, phase identification, microstructure, and optical analysis of CFA and SFA was performed. The results showed that CFA (an alkali binder) had a higher water absorption (WA) value of 9,50 % with a crushing strength (CS) value of 6,30 MPa than SFA (sodium silicate binder) with a CS value of 5,80 MPa and a WA value of 10,28 %. Experimental observations also demonstrated that the leaching ability of SFA was considerably lower than that of CFA. Most notably, SFA can be use...
International Journal of Innovative Research in Science, Engineering and Technology, 2013
Class F flyash sample is subjected to roasting both by conventional process as well as microwave ... more Class F flyash sample is subjected to roasting both by conventional process as well as microwave technique. The phase change during roasting with microwave heating has been investigated by XRD method and the chemical composition has been monitored continually by quantitative as well as AAS method. The results show that the flyash samples couple well with microwave and the temperature can reach approximately 10000 C in 7 minutes. The phase change in iron has been observed along with SiO2 and Al2O3. By proper control of the roasting temperature flyash can be sintered into a reasonably strong and relatively porous glassy ceramic material in a short period of time using microwave technique.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Greener Journal of Science, Engineering and Technological Research, 2014
The purpose of this research work was to develop innovative environmental friendly building brick... more The purpose of this research work was to develop innovative environmental friendly building brick and study their performance, particularly on wetting and drying cycle. To understand the relative significance of these results geopolymer building brick with which different Na2O/(Al2O3+SiO2) has been manufactured. Geopolymer building brick has been manufactured by using highly alkaline solution and an aluminosilicate source. During this research work, (230 × 110 × 75 mm) size building bricks were manufactured. After 25 days of atmospheric curing, the bricks attained a crushing strength of 10 to 12 Mpa. Then the bricks were submerged in water to observe the effect of wetting and drying cycle on strength of brick. Results comprised that even after 10 th cycle, there is no specific deterioration in the crushing strength of brick.
International Journal of Materials and Product Technology
In the present study, fly ash-based pervious concrete (FPC) is fabricated using sintered fly ash ... more In the present study, fly ash-based pervious concrete (FPC) is fabricated using sintered fly ash aggregates. Materials used include OPC Type I cement, the coarse aggregate of size 4.75, 9.5, 12.5 mm, water, and superplasticiser. Using these materials, various concrete mixtures were developed with a water to cement ratio of 0.30, 0.35, and 0.40, respectively. The effect of these parameters on the mechanical properties of the pervious concrete such as compressive strength, flexural strength, tensile strength, permeability, porosity, abrasion resistance, and leachability is studied. The test results showed that pervious concrete materials made with sintered fly ash aggregates had a better mechanical as compared to natural available aggregate. In addition, the concrete with SFA aggregates could achieve compressive strength ranges from 7.15 to 17.40 MPa with porosity range from 26.79 to 34.05% and these can be adopted as an environment-friendly concrete.
Journal of Civil and Environmental Engineering, 2016
This research paper mainly focuses on the utilization of Class F-fly ash (by-product of power pla... more This research paper mainly focuses on the utilization of Class F-fly ash (by-product of power plant) for production of aggregates by different method. In the present study three different types of methods are adopted for preparation of aggregates. Cold bonding, autoclaving and sintering techniques are the very general technique used for preparation of the aggregates. Sodium hydroxide, Bentonite and Sodium silicate are used as a binder material during the pelletization process. The binder and fly ash proportions of 15: 85, 10: 90 and 17: 83 with water to cement ratio 0.3 are mixed to get the fly ash aggregates. Various mechanical properties of the aggregates such as crushing strength, impact test, abrasion test, specific gravity, water absorption, porosity were determined. The test results shows that the 7 days crushing strength and water absorption value of cold bonded aggregates 6.30 Mpa and 12.25% followed by autoclaving is 5.46 Mpa and 13.10% and sintering are 5.80 Mpa and 5.20% ...
The present study includes the microwave sintering of a class F fly ash available in the nearby p... more The present study includes the microwave sintering of a class F fly ash available in the nearby power plant. The ash sample was subjected to sintering with addition of an admixture which is a cheap industrial waste along with water. The sintering temperature was varied in the range of 7000C to 10500C. The sintered mass has diametrical tensile strength up to 30 MPa (corresponding diametrical compressive strength will increase 90 MPa) and the densities also increases up to 2.5 r/cm2 g/cm2 when sintered for 25-35 mins. It has been observed that the samples obtained through microwave sintering is denser as compared to the general sintering processes like draft sintering or pan sintering etc. the sintered pellet obtained after microwave treatment are found to be stronger with high tensile strength. The entire study revealed that microwave sintering of Class F flyash could produce a glossier ceramic phase where mullite (Al2Si2O13) and Anorphite are found to be the prominent crystalline ph...
International Journal of Innovative Research in Science, Engineering and Technology, 2013
In the present study an attempt has been made to understand the influence of fly ash on the growt... more In the present study an attempt has been made to understand the influence of fly ash on the growth of different plant species. In this regard a medium has been prepared using 1:1 soil: fly ash for conducting the study. The result obtained is compiled with different correlation methods. The plant species used in this study includes both aquatic and aromatic plants. During the study an attempt has been made to monitor the effect of fly ash on the growth of plants species in addition, study has been made to estimate the capacity of these plant species to absorb heavy metal.
Iranian Journal of Materials Science and Engineering, Dec 10, 2020
The field of nanomaterials has greatly advanced in the last decade following a wide range of appl... more The field of nanomaterials has greatly advanced in the last decade following a wide range of applications in the fields of electronics, automobiles, construction, and healthcare. Synthesis of the nanomaterials plays a crucial role in redefining the current engineering and science field. At the same time, procuring an environment-friendly end product through eco-friendly solutions and sustainable processes is the key to many global problems. Green synthesis of nanomaterials like graphene and its derivatives involves mild reaction conditions and nontoxic precursors because it is simple, cost-effective, relatively reproducible, and often results in more stable materials. This paper primarily focuses on the green synthesis of graphene and its derivatives (graphene oxide & reduced graphene oxide) and geopolymers; a green technology for preparing graphene reinforced geopolymer composites. Various methods used globally for green synthesis of graphene and geopolymer are briefly discussed and this paper tries to integrate these two areas for a green end product. Preparation techniques and possible applications of these green composites are also discussed to provide insights on the current growth and developments.
Abstract Sustainable use of industrial wastes for the production of new age eco-friendly construc... more Abstract Sustainable use of industrial wastes for the production of new age eco-friendly construction materials can effectively solve the growing environmental concern over landfills and also provide an integrative industrial waste management strategy. Geopolymers are comparatively a new class of aluminosilicate inorganic polymer which has gained wide recognition due to its remarkable physicochemical and mechanical properties. Various industrial wastes such as fly ash, slag, rice husk ash, ferrochrome ash, etc. rich in alumina and silica can serve as suitable precursors for the production of geopolymer binders. This paper presents the experimental investigations on the utilization of ferrochrome ash (FCA), and waste from the ferrochrome industry as a primary precursor having considerable amounts of alumina, silica, magnesium oxide, potassium oxide for preparation of geopolymer concrete having partial replacements of ground granulated blast furnace slag and lime. The fresh and hardened geopolymer concrete properties: workability and compressive strength are thoroughly investigated. The particle size distribution, the chemical composition, mineralogy, microstructure of binder particles were analysed with advanced analytical techniques such as XRF, PSA, XRD, SEM/EDS. The results of this study not only suggest the effective utilization of ferrochrome ash for the synthesis of a new class of geopolymer binders but also provide a sustainable route for the management of ferrochrome waste currently generated in various countries worldwide.
In this paper, two types of lightweight fly ash (FA) aggregates: cold bonded fly ash (CFA) and si... more In this paper, two types of lightweight fly ash (FA) aggregates: cold bonded fly ash (CFA) and sintered fly ash (SFA) aggregates were prepared through the cold bonding and sintering method. During the pelletization process, different ratios of binders to fly ash were used, i.e., 10:90, 15:85, 17:83, and 20:80 with a set amount of water. Cement, metakaolin, sodium silicate, urea-formaldehyde resin, bentonite powder, and phenol-formaldehyde resin were employed as binders. A comparative study on physicochemical, mechanical, phase identification, microstructure, and optical analysis of CFA and SFA was performed. The results showed that CFA (an alkali binder) had a higher water absorption (WA) value of 9,50 % with a crushing strength (CS) value of 6,30 MPa than SFA (sodium silicate binder) with a CS value of 5,80 MPa and a WA value of 10,28 %. Experimental observations also demonstrated that the leaching ability of SFA was considerably lower than that of CFA. Most notably, SFA can be use...
International Journal of Innovative Research in Science, Engineering and Technology, 2013
Class F flyash sample is subjected to roasting both by conventional process as well as microwave ... more Class F flyash sample is subjected to roasting both by conventional process as well as microwave technique. The phase change during roasting with microwave heating has been investigated by XRD method and the chemical composition has been monitored continually by quantitative as well as AAS method. The results show that the flyash samples couple well with microwave and the temperature can reach approximately 10000 C in 7 minutes. The phase change in iron has been observed along with SiO2 and Al2O3. By proper control of the roasting temperature flyash can be sintered into a reasonably strong and relatively porous glassy ceramic material in a short period of time using microwave technique.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Greener Journal of Science, Engineering and Technological Research, 2014
The purpose of this research work was to develop innovative environmental friendly building brick... more The purpose of this research work was to develop innovative environmental friendly building brick and study their performance, particularly on wetting and drying cycle. To understand the relative significance of these results geopolymer building brick with which different Na2O/(Al2O3+SiO2) has been manufactured. Geopolymer building brick has been manufactured by using highly alkaline solution and an aluminosilicate source. During this research work, (230 × 110 × 75 mm) size building bricks were manufactured. After 25 days of atmospheric curing, the bricks attained a crushing strength of 10 to 12 Mpa. Then the bricks were submerged in water to observe the effect of wetting and drying cycle on strength of brick. Results comprised that even after 10 th cycle, there is no specific deterioration in the crushing strength of brick.
International Journal of Materials and Product Technology
In the present study, fly ash-based pervious concrete (FPC) is fabricated using sintered fly ash ... more In the present study, fly ash-based pervious concrete (FPC) is fabricated using sintered fly ash aggregates. Materials used include OPC Type I cement, the coarse aggregate of size 4.75, 9.5, 12.5 mm, water, and superplasticiser. Using these materials, various concrete mixtures were developed with a water to cement ratio of 0.30, 0.35, and 0.40, respectively. The effect of these parameters on the mechanical properties of the pervious concrete such as compressive strength, flexural strength, tensile strength, permeability, porosity, abrasion resistance, and leachability is studied. The test results showed that pervious concrete materials made with sintered fly ash aggregates had a better mechanical as compared to natural available aggregate. In addition, the concrete with SFA aggregates could achieve compressive strength ranges from 7.15 to 17.40 MPa with porosity range from 26.79 to 34.05% and these can be adopted as an environment-friendly concrete.
Journal of Civil and Environmental Engineering, 2016
This research paper mainly focuses on the utilization of Class F-fly ash (by-product of power pla... more This research paper mainly focuses on the utilization of Class F-fly ash (by-product of power plant) for production of aggregates by different method. In the present study three different types of methods are adopted for preparation of aggregates. Cold bonding, autoclaving and sintering techniques are the very general technique used for preparation of the aggregates. Sodium hydroxide, Bentonite and Sodium silicate are used as a binder material during the pelletization process. The binder and fly ash proportions of 15: 85, 10: 90 and 17: 83 with water to cement ratio 0.3 are mixed to get the fly ash aggregates. Various mechanical properties of the aggregates such as crushing strength, impact test, abrasion test, specific gravity, water absorption, porosity were determined. The test results shows that the 7 days crushing strength and water absorption value of cold bonded aggregates 6.30 Mpa and 12.25% followed by autoclaving is 5.46 Mpa and 13.10% and sintering are 5.80 Mpa and 5.20% ...
The present study includes the microwave sintering of a class F fly ash available in the nearby p... more The present study includes the microwave sintering of a class F fly ash available in the nearby power plant. The ash sample was subjected to sintering with addition of an admixture which is a cheap industrial waste along with water. The sintering temperature was varied in the range of 7000C to 10500C. The sintered mass has diametrical tensile strength up to 30 MPa (corresponding diametrical compressive strength will increase 90 MPa) and the densities also increases up to 2.5 r/cm2 g/cm2 when sintered for 25-35 mins. It has been observed that the samples obtained through microwave sintering is denser as compared to the general sintering processes like draft sintering or pan sintering etc. the sintered pellet obtained after microwave treatment are found to be stronger with high tensile strength. The entire study revealed that microwave sintering of Class F flyash could produce a glossier ceramic phase where mullite (Al2Si2O13) and Anorphite are found to be the prominent crystalline ph...
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