scholarly journals The influence of untreated sugarcane bagasse ash on the microstructural and mechanical properties of mortars

2018 ◽  
Vol 68 (329) ◽  
pp. 148 ◽  
Author(s):  
M. A. Maldonado-García ◽  
U. I. Hernández-Toledo ◽  
P. Montes-García ◽  
P. L. Valdez-Tamez
Keyword(s):  
Mechanical Properties ◽  
Sugarcane Bagasse ◽  
Composition Analysis ◽  
X Ray Diffraction ◽  
Microstructural Characteristics ◽  
X Ray ◽  
Physical Absorption ◽  
Sugarcane Bagasse Ash ◽  
Xrd Techniques

This study investigated the effects of the addition of untreated sugarcane bagasse ash (UtSCBA) on the microstructural and mechanical properties of mortars. The SCBA was sieved for only five minutes through a No. 200 ASTM mesh, and fully characterized by chemical composition analysis, laser ray diffraction, the physical absorption of gas, scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Mortar mixtures with 0, 10 and 20% UtSCBA as cement replacement and a constant 0.63 water/cementitious material ratio were prepared. Fresh properties of the mortars were obtained. The microstructural characteristics of the mortars at 1, 7, 28, 90 and 600 days were evaluated by SEM and XRD. The compressive strengths of the mortars at the same ages were then obtained. The results show that the addition of 10 and 20% UtSCBA caused a slight decrease in workability of the mortars but improved their microstructure, increasing the long-term compressive strength.

scholarly journals On the influence of sugarcane bagasse ashes as a partial replacement of cement in compressive strength of mortars

2018 ◽  
Vol 8 (1) ◽  
pp. 30-37
Author(s):  
Romildo Alves Berenguer ◽  
Paulo Helene ◽  
Fernando Artur Nogueira Silva ◽  
Sandro Marden Torres ◽  
Eliana Cristina Barreto Monteiro ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Sugarcane Bagasse ◽  
Amorphous Material ◽  
Partial Replacement ◽  
Experimental Program ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sugarcane Bagasse Ash ◽  
Short And Long Term

This paper presents an experimental program objectifying at investigating the potential of the use of sugarcane bagasse ash as a partial replacement of cement in the production of mortars. Sugarcane bagasse ashes from two origins were studied - one from sugarcane industry directly and other from pizzerias that uses this material replacing the wood in their ovens. The methodology followed the characterization of the material, where it was carried out through laboratory tests using X-ray diffraction (XRD) and X-ray fluorescence (WDXRF) and initial tests for the ideal quantification of cement substitution by residues. Results obtained indicated that both residues exhibited pozolanic features presenting about 60% of amorphous material in their composition and compressive strength tests at different ages showed satisfactory results. Concluding that residues played an important role in increasing short and long term compressive strengths.

Assessing the pozzolanic activity of sugarcane bagasse ash using X-ray diffraction

2020 ◽  
Vol 264 ◽  
pp. 120684 ◽  
Author(s):  
Sara Martins Torres ◽  
Victor Estolano de Lima ◽  
Priscilla de Azevedo Basto ◽  
Nilvan T. de Araújo Júnior ◽  
Antonio A. de Melo Neto
Keyword(s):  
Sugarcane Bagasse ◽  
Pozzolanic Activity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sugarcane Bagasse Ash

Behavior of UO2 in the RBMK-1000 Spent Fuel under Oxidizing Conditions

2004 ◽  
Vol 824 ◽  
Author(s):  
A. B. Kolyadin ◽  
V. Ya. Mishin ◽  
K. Ya. Mishin ◽  
A. S. Aloy ◽  
T. I. Koltsova
Keyword(s):  
Thermal Oxidation ◽  
Spent Nuclear Fuel ◽  
Oxidation Process ◽  
Spent Fuel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dry Storage ◽  
Different Temperatures ◽  
Xrd Techniques

AbstractThe oxidation of UO2–type spent nuclear fuel (SNF) in gaseousmedia was studied at different temperatures and oxygen contents using gravimetric and powder X-ray diffraction (XRD) techniques. The aim of the study was to determine the mechanism(s) of thermal-oxidation alteration of SNF during long-term dry storage. The samples used in the experiments were chips of RBMK-1000 fuel rods.Oxidation of UO2with a mean burn-up of 10.7 and 19.73 MW d/kg in humid air was observed at a temperature as low as 150°C. At 200°C nearly all of the UO2was transformed into U3O8 between 3500-4000 hours. In a humid nitrogen environment containing of 0.05-1.3 vol. % oxygen at 300°C, the UO2 completely transformed to U3O8 between 2500-3000 hours. Oxidation of UO2in samples with small amounts of jacket damage (e.g., <0.04 MM2)ll progresses more slowly and after â3000 hours the oxygen-to-uranium ratio was 2.56.Stabilization of the oxidation process was not observed in the fuel samples upto an O/U ratio of 2.4, which may be attributed to the smallburn-up of the fuel under investigation.

Utilization of CFB Fly Ash in Eco-Cement: Mechanical Properties and Microstructural Analysis

2010 ◽  
Vol 150-151 ◽  
pp. 885-889 ◽  
Author(s):  
Xiao Ming Liu ◽  
Yu Li ◽  
Ling Ling Zhang ◽  
Da Qing Cang
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Circulating Fluidized Bed ◽  
Microstructural Analysis ◽  
Hydration Products ◽  
X Ray Diffraction ◽  
Cement Pastes ◽  
X Ray ◽  
Xrd Techniques ◽  
Furnace Slag

The disposal of circulating fluidized bed (CFB) fly ash has been a serious environmental problem in the development of our society. In this work, the feasibility of recycling CFB fly ash as a blended material incorporating blast furnace slag (BFS), clinker and gypsum for the preparation of Eco-cement has been investigated. The mechanical properties of CFB fly ash based Eco-cements, including CFB fly ash–clinker system, CFB fly ash–ground BFS system, and CFB fly ash–ground BFS–clinker system, were evaluated in this paper. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used to analyze the microstructural changes and the hydration products of the CFB fly ash based Eco-cement pastes. The results indicated that it is feasible to use CFB fly ash along with BFS and clinker to produce Eco-cement. The hydration products of CFB fly ash based Eco-cement are mostly ettringite and amorphous C-S-H gel, which are principally responsible for the strength and structure development of CFB fly ash based Eco-cement in the hydration process.

Preparation and Characterization of Silica Gel from Bagasse Ash

2018 ◽  
Vol 1145 ◽  
pp. 44-48 ◽  
Author(s):  
Chanchira Channoy ◽  
Somchai Maneewan ◽  
Chantana Punlek ◽  
Surapong Chirarattananon
Keyword(s):  
Sodium Hydroxide ◽  
Sugarcane Bagasse ◽  
Extraction Method ◽  
Agricultural Waste ◽  
Silica Content ◽  
Alkaline Extraction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sugarcane Bagasse Ash

Sugarcane bagasse is an agricultural waste that is potentially used as natural silica resources. Natural silica claimed to be safe in handing, cheap and can be generate from cheap resource. In the objectives of this study were to prepared silica from Sugarcane bagasse. The preparation of Sugarcane bagasse ash by burning at 700 °C for 4 and 6 h, respectively in atmosphere. The result of X-ray florescent: XRF, silica content which was obtained after heat treatment at 700 °C for 6 h was 80.814 wt%. Bagasse ash was purified by alkaline extraction method with 1.5, 2 and 2.5 N sodium hydroxide (NaOH), respectively. And refluxed by using concentrated 2 N sulfuric acid. From X-ray diffraction pattern showed that the obtained products were amorphous silica, 2.5 N sodium hydroxide. The morphology was observed by SEM, sphere and average particles dimension of synthesis silica with 1.5, 2 and 2.5 N NaOH are 120, 100 and 80 nm respectively. The SEM micrographs showed that the Concentration of NaOH was increased, the particles dimension decreased

scholarly journals Sugarcane Bagasse Ash Micronized Using Air Jet Mills for Green Pozzolan in Brazil

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Rafael G. D. Molin Filho ◽  
Jaciele M. Rosso ◽  
Eduardo A. Volnistem ◽  
Romel D. Vanderlei ◽  
Leda M. S. Colpini ◽  
...  
Keyword(s):  
Sugarcane Bagasse ◽  
Large Scale ◽  
Cement Composite ◽  
X Ray Diffraction ◽  
Specific Mass ◽  
X Ray ◽  
Air Jet ◽  
Axial Compressive Strength ◽  
Sugarcane Bagasse Ash ◽  
Jet Milling

This study provided a basis for new possibilities concerning the use of the sugarcane bagasse ash as a green pozzolanic addition to the Portland cement composite. To that effect, a simple micronization method using air jet milling without any other additional thermal procedure was used to control the characteristics of ash particles. This procedure not only maintains the required characteristics of the residues but can also improve some of them. Sugarcane bagasse ash is a residue produced on large scale in Brazil by ethanol and sugar plants as a result of the burning of sugarcane bagasse in energy cogeneration. The residue used in this study was initially characterized by scanning electron microscopy, granulometric and specific mass analyses, N2 adsorption measurements, X-ray diffraction, X-ray fluorescence spectroscopy, and thermogravimetric analysis with differential thermal analysis. Pozzolanic ash activity was evaluated according to the axial compressive strength at 28 days and the modified Chapelle methods. The results showed that the milling fly sugarcane bagasse ash samples presented satisfactory pozzolanic activity.

Characterization of Sugarcane Bagasse Ash for Use in Ceramic Bodies

2010 ◽  
Vol 660-661 ◽  
pp. 1049-1052 ◽  
Author(s):  
Katia C.P. Faria ◽  
R.F. Gurgel ◽  
J.N.F. Holanda
Keyword(s):  
Sugarcane Bagasse ◽  
Ceramic Industry ◽  
Plastic Material ◽  
Sugar Cane Bagasse ◽  
X Ray Diffraction ◽  
Ceramic Tiles ◽  
X Ray ◽  
Sugarcane Bagasse Ash ◽  
Sugar Cane Bagasse Ash

The objective of this work is to characterization of sugarcane bagasse ash waste aiming the use it in red ceramic industry. The characterization was done in terms of chemical composition, X-ray diffraction, particle size distribution, morphology, and plasticity. The results show that the cane bagasse ash waste is a non plastic material, which contains high content of silica and minor amounts of Al, Fe, Ca, Mg, and K oxides. Thus, the sugar cane bagasse ash waste presents high potential for application in the manufacture of ceramic products such as bricks, roofing tiles, and ceramic tiles.

Experiment Analysis on the Mechanical Properties of the Horizontally Stratified Mudstone

2014 ◽  
Vol 1065-1069 ◽  
pp. 31-34
Author(s):  
Fu Rong Ma ◽  
Pi Liang Li
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
X Ray Diffraction ◽  
Soft Layer ◽  
X Ray ◽  
Hard Layer ◽  
Expansion Behavior ◽  
Strength Tests ◽  
Experiment Analysis

In order to analyze the physical and mechanical properties of the stratified mudstone, the specimens are collected from southwest Nanning , Guangxi, China. X-ray diffraction is used to analyze the mineral composition, the high montmorillonite content affects softening and expansion behavior of the mudstone. The strength tests show that the strength of stratified mudstone is low. When weakness layer exists in the mudstone, the strength is controlled by the soft layer. By long-term immersion in water, the strength will be approximately 76% to 85% reduction. The uniaxial compressive strength tests show that the ratio between soft layer and hard layer under natural is 0.17. The ratio between soft layer and hard layer under saturation is 0.10, under air seasoning is 0.42.

scholarly journals Effect of silver nanoparticless in the structure and mechanical properties of mullite/Ag cermets

2019 ◽  
Vol 51 (2) ◽  
pp. 175-187
Author(s):  
Gabriela Téllez-Arias ◽  
José Miranda-Hernández ◽  
Oscar Olea-Mejía ◽  
J. Lemus-Ruiz ◽  
Eduardo Terrés
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
X Ray Diffraction ◽  
Microstructural Characteristics ◽  
X Ray ◽  
Different Temperatures ◽  
Confocal Scanning ◽  
Confocal Scanning Microscopy ◽  
Scanning Electron

The objective of this work was to study the influence of the addition of silver nanoparticles in the microstructure of mullite at two different temperatures of sintering (1500 and 1600?C), in order to decrease the porosity and increase the density as well better the hardness and fracture toughness. The microstructural characteristics were studied by scanning electron microscopy, confocal scanning microscopy and X-ray diffraction. Mullite/Ag cermets with homogenous microstructure were and a fracture toughness of 2.42 MP??m1/2.

Boron Nitride Doped Transparent Polycrystalline Silicon Nitride Ceramics

2010 ◽  
Vol 658 ◽  
pp. 428-431
Author(s):  
Bhupendra Joshi ◽  
Hyun Hwi Lee ◽  
Seung Ho Kim ◽  
Zheng Yi Fu ◽  
Koichi Niihara ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Polycrystalline Silicon ◽  
Sintering Aids ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nitride Ceramics ◽  
Xrd Techniques ◽  
Scanning Electron

The addition of h- BN to a polycrystalline Si3N4 was to increase the fracture toughness and other mechanical properties such as flexural strength and hardness of the material. The hot pressed samples were prepared from the mixture of α-Si3N4, AlN, MgO and h-BN. The composite contained from 0 to 2 wt.% BN powder with sintering aids (9% AlN + 3% MgO). The transparency, mechanical properties and microstructure of hot pressed polycrystalline Si3N4-BN composite materials were investigated by UV/VIS spectrophotometer, scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The transparency decreased with increasing the content of h-BN into Si3N4.

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