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Tytuł:
Thermal Insulation and Mechanical Properties in the Presence of Glas Bubble in Fly Ash Geopolymer Paste
Autorzy:
Shahedan, Noor Fifinatasha
Abdullah, Mohd Mustafa Al Bakri
Mahmed, Norsuria
Liew, Yun Ming
Shayfull, Zamree Abd Rahim
Aziz, Ikmal Hakem A.
Kadir, Aeslina Abdul
Sandu, Andrei Victor
Ghazali, Mohd Fathullah
Powiązania:
https://bibliotekanauki.pl/articles/2048833.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
glass bubble
thermal insulation
geopolymers
fly ash
Opis:
The density, compressive strength, and thermal insulation properties of fly ash geopolymer paste are reported. Novel insulation material of glass bubble was used as a replacement of fly ash binder to significantly enhance the mechanical and thermal properties compared to the geopolymer paste. The results showed that the density and compressive strength of 50% glass bubble was 1.45 g/cm3 and 42.5 MPa, respectively, meeting the standard requirement for structural concrete. Meanwhile, the compatibility of 50% glass bubbles tested showed that the thermal conductivity (0.898 W/mK), specific heat (2.141 MJ/m3 K), and thermal diffusivity (0.572 mm2 /s) in meeting the same requirement. The improvement of thermal insulation properties revealed the potential use of glass bubbles as an insulation material in construction material.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 1; 221-226
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Zeolite Phase Made from Rice Husk Ash and Sidrap Clay
Autorzy:
Armayani, M.
Mansur, Musdalifa
Asra, Reza
Irwan, Muh
Ramadhanty, Dhian
Subaer, Subaer
Abdullah, Mohd Mustafa Al Bakri
Aziz, Ikmal Hakem A.
Jeż, Bartłomiej
Nabiałek, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2203746.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
autoclave
clay
rice husk ash
zeolite
Opis:
Zeolite has been successfully synthesized from clay and rice husk ash in the form of powder by using the hydrothermal method with variations in chemical compositions of alkaline solution and the amount of rice husk ash. The clay raw material was obtained from the Sidrap area of South Sulawesi and rice husk ash is obtained from the burning pile of rice husks. Sidrap clay and rice husk ash were activated using an alkaline solution of NaOH and varied rice husk ash and the addition of AlCl3. The addition of AlCl3, an alkaline solution of NaOH and H2O was used in the amount of 25.5 grams and variations of rice husk ash were 2.5 grams and 6.5 grams. Meanwhile, without the addition of AlCl3, an alkaline solution of NaOH and H2O was used for 20.5 grams and variations of rice husk ash from 2.5 grams and 6.5 grams. Then the mixture was then put into an autoclave with a temperature of 100°C for 3 hours. The basic material used in the manufacture of zeolite is carried out by X-ray Fluorescence (XRF) characterization to determine the constituent elements of basic material, which showed the content of SiO2 was 45.80 wt% in the clay and 93.40% in the rice husk ash. The crystalline structure of the zeolite formed was characterized by X-Ray Diffraction (XRD). It was found the resulting zeolite were identified as Zeolite-Y, Hydrosodalite, and ZSM-5. The microstructure properties of the resulting zeolite were determined by using Scanning Electron Microscopy (SEM).
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 269--274
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silica Bonding Reaction on Fly Ash Based Geopolymer Repair Material System with Incorporation of Various Concrete Substrates
Autorzy:
Al Bakri Abdullah, Mohd Mustafa
Aziz, Ikmal Hakem A.
Zailani, Warid Wazien Ahmad
Rahim, Shayfull Zamree Abd
Yong, Heah Cheng
Sandu, Andrei Victor
Peng, Loke Siu
Powiązania:
https://bibliotekanauki.pl/articles/2174557.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fly ash geopolymer
repair material
concrete substrate
interfacial zone transition
Opis:
This paper presents an experimental investigation on the mechanical properties and microstructure of geopolymer repair materials mixed using fly ash (FA) and concrete substrates. An optimal combination of FA and concrete substrate was determined using the compressive test of geopolymer mortar mixed with various concrete substrate classes. It was found that the contribution of (C35/45) concrete substrates with the FA geopolymer mortar increases the 28-day bonding strength by 25.74 MPa. The microstructure analysis of the samples using scanning electron microscopy showed the denser structure owing to the availability of high calcium and iron elements distribution. These metal cations (Ca2+ and Fe3+) are available at OPC concrete substrate as a result from the hydration process reacted with alumina-silica sources of FA and formed calcium aluminate silicate hydrate (C-A-S-H) gels and Fe-bonding linkages.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1277--1281
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduction of random telegraph signal (RTS) noise in CMOS image sensors using histogram analysis
Autorzy:
bin Mustafa, M. A.
Itoh, S.
Kawahito, S.
Powiązania:
https://bibliotekanauki.pl/articles/385238.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
histogram analyses
random telegraph signal (RTS) noise
CMOS image sensor
low-noise
estimated amplitude
Opis:
The paper presents column parallel signal processing techniques for reducing Random Telegraph Signal (RTS) noise of in-pixel source follower by using histogram analysis for the development of a very low-noise CMOS image sensor. In this method, a histogram with multiple samples for reset level is used to estimate the amplitude of the RTS noise. With the median of the histogram and the estimated amplitude, the RTS noise components are removed and the average is calculated with the histogram due to thermal noise only, to further reduce the noise level. Result of the application of the histogram-based noise suppres-sion to an implemented CMOS image sensor prototype for a large sampling numbers is demonstrated.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 202-203
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Raised plasma insulin level and homeostasis model assessment (HOMA) score in cerebral malaria: evidence for insulin resistance and marker of virulence
Autorzy:
Eltahir, Elrashid
ElGhazali, Gehad
A-Elgadir, Thoraya
A-Elbasit, Ishraga
Elbashir, Mustafa
Giha, Hayder
Powiązania:
https://bibliotekanauki.pl/articles/1040314.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
insulin resistance
virulence
hyperglycaemia
HOMA
cerebral malaria
Opis:
Objective: To study the glycaemic profile of patients with severe malaria (SM). Methods: For this purpose, 110 SM patients were recruited. Pre-treatment random blood glucose and plasma insulin were measured in a subset of donors. An ex-vivo experiment was developed for estimation of glucose consumption by parasitized erythrocytes. Results: Hyperglycaemia was frequent in SM but more commonly associated with cerebral malaria (CM), while hyperinsulinaemia was recognized in severe-malarial-hypotension (median, 25 %-75 %, 188.2, 93.8-336.8 pmol/L). The plasma insulin level was positively correlated with age (CC = 0.457, p < 0.001) and negatively with parasitaemia (CC = -0.368, p = 0.045). Importantly, fatal-CM was associated with hyperglycaemia (12.22, 6.5-14.6 mmol/L), hyperinsulinaemia (141.0, 54.0-186.8 pmol/L) and elevated homeostasis model assessment (HOMA) values. However, there was a trend of higher glucose consumption by parasites in CM compared with that in uncomplicated malaria (UM). Conclusion: Hyperglycaemia, hyperinsulinaemia and elevated HOMA are evidence for insulin resistance and possibly pancreatic B-cell dysfunction in fatal-CM.
Źródło:
Acta Biochimica Polonica; 2010, 57, 4; 513-520
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integration of energy saving with lean production in a food processing company
Autorzy:
Salah, Sameh A.
Mustafa, Ahmad
Powiązania:
https://bibliotekanauki.pl/articles/2052198.pdf
Data publikacji:
2021
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
lean production
seven wastes
specific energy consumption
Opis:
Increasing the energy efficiency has become a key concern in manufacturing companies due to the increased energy costs and the environmental impacts. More efficient energy saving can make the most economic contribution towards solving these problems in the short run. Companies’ governments are striving to identify the most effective measures to improve energy efficiency in manufacturing processes. The specific energy consumption (SEC) is a key performance indicator used to measure the energy consumed per product. Therefore, an improvement of this value contributes to decouple of economic growth from related increase of energy consumption. This paper highlights the needs of manufacturing companies for integrating energy performance in production management. This work focuses on studying the impact of implementing lean production concepts on decreasing the SEC in a food processing organization. The reduction of SEC can be achieved by increasing the total efficiency of the production line. Implementing the lean production methodology by using energy management model achieve an increase in the production output. The lean production used to eliminate all kinds of waste in production, while using the same input resources such as raw material and energy. The main source of waste found on the production line is the defective product and time waste during changeover and manual process. The achieved results showed that the SEC improved by 15.1% by reducing the lean wastes in the production line. Implementation of lean methodology has a great impact on improving the energy saving by reducing the specific energy consumption in the organization. The SEC is a key performance indicator used to measure the efficiency of a production line or a machine in relation to its production. Energy management model is useful in identifying the area of improvement and the energy saving measure.
Źródło:
Journal of Machine Engineering; 2021, 21, 4; 118-133
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite Element Analysis on Structural Behaviour of Geopolymer Reinforced Concrete Beam using Johnson-Cook Damage in ABAQUS
Autorzy:
Mortar, Nurul Aida Mohd
Al Bakri Abdullah, Mohd Mustafa
Hussin, Kamarudin
Razak, Rafiza Abdul
Hamat, Sanusi
Hilmi, Ahmad Humaizi
Shahedan, Noorfifi Natasha
Li, Long Yuan
Aziz, Ikmal Hakem A.
Powiązania:
https://bibliotekanauki.pl/articles/2174588.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fly ash geopolymer
geopolymer concrete
finite element analysis
Johnson Cook Damage
ABAQUS software
Opis:
This paper details a finite element analysis of the behaviour of Si-Al geopolymer concrete beam reinforced steel bar under an impulsive load and hyper velocity speed up to 1 km/s created by an air blast explosion. The initial torsion stiffness and ultimate torsion strength of the beam increased with increasing compressive strength and decreasing stirrup ratio. The study involves building a finite element model to detail the stress distribution and compute the level of damage, displacement, and cracks development on the geopolymer concrete reinforcement beam. This was done in ABAQUS, where a computational model of the finite element was used to determine the elasticity, plasticity, concrete tension damages, concrete damage plasticity, and the viability of the Johnson-Cook Damage method on the Si-Al geopolymer concrete. The results from the numerical simulation show that an increase in the load magnitude at the midspan of the beam leads to a percentage increase in the ultimate damage of the reinforced geopolymer beams failing in shear plastic deformation. The correlation between the numerical and experimental blasting results confirmed that the damage pattern accurately predicts the response of the steel reinforcement Si-Al geopolymer concrete beams, concluded that decreasing the scaled distance from 0.298 kg/m3 to 0.149 kg/m3 increased the deformation percentage.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1349--1354
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors affecting the susceptibility of sea lice infection in Atlantic salmon
Autorzy:
Mustafa, A.
Piasecki, W.
Powiązania:
https://bibliotekanauki.pl/articles/838117.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Lepeophtheirus salmonis
fish parasite
Salmo salar
Atlantic salmon
fish
Caligus elongatus
sea lice
infection
sea louse
susceptibility
Źródło:
Annals of Parasitology; 2005, 51, 4
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors affecting the susceptibility of sea lice infection in Atlantic salmon
Autorzy:
Mustafa, A.
Piasecki, W.
Powiązania:
https://bibliotekanauki.pl/articles/2146418.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
Lepeophtheirus salmonis
fish parasite
Salmo salar
Atlantic salmon
fish
Caligus elongatus
sea lice
infection
sea louse
susceptibility
Opis:
Parasitic copepods of the family Caligidae, otherwise known as sea lice (Lepeophtheirus salmonis and Caligus elongatus), are responsible for serious disease problems in salmon aquaculture. This mini-review examines the host factors that are affecting the susceptibility of sea lice infection in salmon; in particular, host species, environment, host stress levels, and host immunocompetency. In order to develop more effective methods to control sea lice infection, these factors should be taken into account, along with other factors such as sea lice life cycle and fecundity as well as salmon husbandry methods.
Źródło:
Wiadomości Parazytologiczne; 2005, 51, 4; 281-285
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and Characterization of Polyphenylsulfone/Titanium Oxide Nanocomposite Membranes for Oily Wastewater Treatment
Autorzy:
Al-Jadir, Thaer
Alardhi, Saja Mohsen
Alheety, Mustafa A.
Najim, Aya A.
Salih, Issam K.
Al-Furaiji, Mustafa
Alsalhy, Qusay F.
Powiązania:
https://bibliotekanauki.pl/articles/2202289.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
PPSU
polyphenylsulfone
TiO2
nanoparticles
ultrafiltration membrane
oily wastewater treatment
antifouling
Opis:
Polyphenylsulfone (PPSU) membranes are critical for numerous applications, including water treatment, oil separation, energy production, electronic manufacturing, and biomedicine because of their low cost; regulated crystallinity; and chemical, thermal, and mechanical stability. Numerous studies have shown that altering the surface characteristics of PPSU membranes affects their stability and functionality. Nanocomposite membranes of PPSU (P0), PPSU-1%TiO2 (P1), and PPSU-2% TiO2 (P2) were prepared using the phase inversion method. Scanning electron microscopy and thermal analysis were performed to determine the contact angle and mechanical integrity of the proposed membranes. The results showed that the membranes contained channels of different diameters extending between 1.8 μm and 10.3 μm, which made them useful in removing oil. Thermal measurements showed that all of the PPSU membranes were stable at a temperature of not less than 240 °C, and had good mechanical properties, including tensile strength of 7.92 MPa and elongation of 0.217%. These properties enabled them to function in a harsh thermal environment. The experimental results of oil and water separation and BSA solution fouling on membrane P2 showed a 92.95% rejection rate and a flux recovery ratio of 82.56%, respectively, compared to P0 and P1.
Źródło:
Journal of Ecological Engineering; 2022, 23, 12; 1--13
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental investigation of chopped steel wool fiber at various ratio reinforced cementitious composite panels
Autorzy:
Rmdan Amer, Akrm A.
Al Bakri Abdullah, Mohd Mustafa
Ming, Liew Yun
Aziz, Ikmal Hakem A.
Mohd Tahir, Muhammad Faheem
Abd Rahim, Shayfull Zamree
Amer, Hetham A. R.
Powiązania:
https://bibliotekanauki.pl/articles/1852332.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
włókno stalowe
włókno posiekane
wełna stalowa
kompozyt cementowy
płyta kompozytowa
nośność
steel fiber
chopped fiber
steel wool
cementitious composite
composite panel
load carrying capacity
Opis:
The flexural toughness of chopped steel wool fiber reinforced cementitious composite panels was investigated. Reinforced cementitious composite panels were produced by mixing of chopped steel wool fiber with a ratio range between 0.5% to 6.0% and 0.5% as a step increment of the total mixture weight, where the cement to sand ratio was 1:1.5 with water to cement ratio of 0.45. The generated reinforced cementitious panels were tested at 28 days in terms of load-carrying capacity, deflection capacities, post-yielding effects, and flexural toughness. The inclusion of chopped steel wool fiber until 4.5% resulted in gradually increasing load-carrying capacity and deflection capacities while, provides various ductility, which would simultaneously the varying of deflection capability in the post-yielding stage. Meanwhile, additional fiber beyond 4.5% resulted in decreased maximum load-carrying capacity and increase stiffness at the expense of ductility. Lastly, the inclusion of curves gradually.
Źródło:
Archives of Civil Engineering; 2021, 67, 3; 661-671
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and numerical studies of fatigue properties of carbon/glass fiber/epoxy hybrid composites enhanced with nano TiO2 powder
Autorzy:
Hunain, Mustafa Baqir
Abass, Basim A.
Akhudair, Jaafar Musa
Powiązania:
https://bibliotekanauki.pl/articles/1840903.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
hybrid nano-composite materials
fatigue
mechanical properties
hybrydowy materiał kompozytowy
nanokompozyt
zmęczenie
właściwości mechaniczne
Opis:
The present work deals with the fatigue behavior of hybrid nanocomposites consisting epoxy strengthen by unidirectional carbon fibres, and/or woven roving glass fiber and TiO2 nanofillers. For this purpose, nanocomposite material was manufactured by mixing TiO2 nanoparticles with the epoxy using an ultrasonic mixer to insure complete dispersion of such particles in the base material. Different particle concentrations (1, 3, and 5) % wt. of TiO2 nanoparticles have been added to the epoxy. Different types of hybrid nano composite materials were manufactured by adding three layers of carbon fibers and/or woven roving glass fiber to the prepared epoxy nanocomposite materials with a constant weight fraction of 30%. The laminated hybrid nanocomposite materials were then prepared using hand lay-up technique using a vacuum device. For experimental purposes tensile and fatigue test specimens have been manufactured according to ASTM-D3039 and ASTM D 3479/D 3479M-96, respectively, while ANSYS19 program was used to analyze the fatigue behavior of such materials numerically. Tensile tests were carried out at room temperature while fatigue tests has been carried out at constant stress ratio (R=-1). Scanning electron microscope (SEM) was used to identify the underlying mechanisms for fatigue failure and the progressive of damage growth. For each test, three specimens were tested and the average magnitude for each property was taken. The results obtained indicated that the hybrid nanocomposite (EP+C/C/C+3% TiO2) has the highest fatigue limit and tensile strength in comparison with the other tested material, while the SEM results showed that the composite failed by a brittle way. It has been also generally observed that the addition of (TiO2) nanoparticles has a positive effect on the fatigue behaviour of the such materials.
Źródło:
Diagnostyka; 2021, 22, 2; 75-84
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Rainfall-Runoff Erosivity Factor for Cameron Highlands, Pahang, Malaysia
Autorzy:
Abdulkadir, T. S.
Mustafa, M. R.
Yusof, K. W.
Hashim, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/123050.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
rainfall
erosivity factor
soil erosion
USLE/RUSLE
runoff
Opis:
Rainfall-runoff is the active agent of soil erosion which often resulted in land degradation and water quality deterioration. Its aggressiveness to induce erosion is usually termed as rainfall erosivity index or factor (R). R-factor is one of the factors to be parameterized in the evaluation of soil loss using the Universal Soil Loss Equation and its reversed versions (USLE/RUSLE). The computation of accurate R-factor for a particular watershed requires high temporal resolution rainfall (pluviograph) data with less than 30-minutes intensities for at least 20 yrs, which is available only in a few regions of the world. As a result, various simplified models have been proposed by researchers to evaluate R-factor using readily available daily, monthly or annual precipitation data. This study is thus aimed at estimating R-factor and to establish an approximate relationship between R-factor and rainfall for subsequent usage in the estimation of soil loss in Cameron highlands watershed. The results of the analysis showed that the least and peak (critical) R-factors occurred in the months of January and April with 660.82 and 2399.18 MJ mm ha-1 h-1year-1 respectively. Also, it was observed that erosivity power starts to increase from the month of January through April before started falling in the month of July. The monthly and annual peaks (critical periods) may be attributed to increased rainfall amount due to climate change which in turn resulted to increased aggressiveness of rains to cause erosion in the study area. The correlation coefficient of 0.985 showed that there was a strong relationship rainfall and R-factor.
Źródło:
Journal of Ecological Engineering; 2016, 17, 3; 1-8
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engineering-geological and geotechnical investigations for risk assessment of the University Olympic Village in Izmir (Turkey)
Autorzy:
Kıncal, Cem
Koca, Mehmet Yalçın
Yılmaz, H. Recep
Akgün, Mustafa
Özyalın, Şenol
Eskişar, Tuğba
Akçığ, Zafer
Loon, A. J. (Tom)
Powiązania:
https://bibliotekanauki.pl/articles/94556.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
engineering geology
hazard maps
bearing capacity
Izmir
Turkey
geologia inżynierska
mapy zagrożenia
nośność statyczna
Turcja
Opis:
The Metropolitan Municipality of Izmir (Turkey) designated a steeply inclined area for the construction of buildings to house the participants of the Izmir University Olympic Games. Before the construction activities could start, engineering geological and geotechnical investigations had to be carried out in order to establish which zones in the area were suitable for safe constructions. Seismic studies, borings and laboratory tests yielded the data, which were used for preparing five hazard maps in a GIS environment. The construction activities based on the results of this complex investigation appeared successful. The engineering geological investigations included geotechnical measurements on core samples obtained from the boreholes (core drilling) and laboratory testing. The rock-quality designation (RQD%) values of the rock units were determined and used in the rock-mass classification (rock-mass rating method) as an in-put parameter and in the calculation of the bearing capacity of the various rock units. Geophysical surveys were carried out to determine the seismic velocity of the rocks at the site. A short overview is provided of the main problems that had to be dealt with, and of the successive steps taken to solve the engineering-geological problems. Determination of these problems is necessary for adequate land-use planning and construction activities.
Źródło:
Geologos; 2010, 16, 1; 43-57
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Naoh Molar Concentration on Microstructure and Compressive Strength of Dolomite/Fly Ash-Based Geopolymers
Autorzy:
Azimi, Emy Aizat
Salleh, Mohd M. A. A.
Abdullah, Mohd Mustafa Al Bakri
Aziz, Ikmal Hakem A.
Hussin, Kamarudin
Chaiprapa, Jitrin
Vizureanu, Petrica
Yoriya, Sorachon
Nabiałek, Marcin
Wyslocki, Jerzy J.
Powiązania:
https://bibliotekanauki.pl/articles/2125545.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dolomite/fly ash
geopolymer
NaOH concentration
synchrotron
micro-XRF
Opis:
Dolomite can be used as a source of aluminosilicate to produce geopolymers; however, this approach is limited by its low reactivity. This study analyzes the viability of producing geopolymers using dolomite/fly-ash with sodium silicate and NaOH solutions (at multiple concentrations) by determining the resultant geopolymers’ compressive strengths. The dolomite/fly-ash-based geopolymers at a NaOH concentration of ~22 M resulted in an optimum compressive strength of 46.38 MPa after being cured for 28 days, and the SEM and FTIR analyses confirmed the denser surface of the geopolymer matrix. The synchrotron micro-XRF analyses confirmed that the Ca concentration exceeded that of Si and Mg, leading to the formation of calcium silicate hydrate, which strengthens the resulting geopolymers.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 993--998
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
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