scholarly journals STRENGTH, DURABILITY AND MICROSTRUCTURE INVESTIGATIONS OF CONCRETE CONTAINING EMPTY PALM OIL FRUIT BRUNCH ASH (EPO-FBA)

2021 ◽  
Vol 30 (2) ◽  
Author(s):  
Christopher
Keyword(s):  
Palm Oil ◽  
Strength Properties ◽  
Microscopic Level ◽  
Replacement Level ◽  
Structural Concrete ◽  
Strength Behavior ◽  
Strengths Development ◽  
Internal Arrangement ◽  
Cementing Material ◽  
Insight Into

Understanding of the internal arrangement of the constituents of structural concrete, at the microscopic level, and its strength behavior, as well as its ability to result in durable concrete, are necessary in order to enhance its innovative and sustainable application. This paper presents the results of investigation conducted to ascertain the strength characteristics, microstructure configuration and durability traits of concrete with its ordinary Portland cement (OPC) fraction replaced partially with empty palm oil fruit brunch ash (EPO-FBA). The compressive strength properties were assessed with 150 x 150 x 150 cube specimens while 100 x 100 x 100 cube specimens were used to assess the durability properties. An insight into the morphology and the microstructure of samples with EPO-FBA was obtained through Scanning Electron Microscopy (SEM). The results showed that EPO-FBA is a good supplementary cementing material up to 10% replacement level, however, the samples with EPO-FBA showed a significantly improved compressive strengths development and good durability characteristics at latter ages, at the replacement level beyond 10%.

Insight into Co-pyrolysis of Palm Kernel Shell (PKS) with Palm Oil Sludge (POS): Effect on Bio-oil Yield and Properties

2019 ◽  
Vol 11 (11) ◽  
pp. 5877-5889 ◽  
Author(s):  
Harvindran Vasu ◽  
Choon Fai Wong ◽  
Navin Raj Vijiaretnam ◽  
Yen Yee Chong ◽  
Suchithra Thangalazhy-Gopakumar ◽  
...  
Keyword(s):  
Palm Oil ◽  
Palm Kernel ◽  
Oil Sludge ◽  
Oil Yield ◽  
Palm Kernel Shell ◽  
Bio Oil ◽  
Insight Into

scholarly journals THE EFFECT OF CERAMIC WASTE AS COARSE AGGREGATE ON STRENGTH PROPERTIES OF CONCRETE

2017 ◽  
Vol 36 (3) ◽  
pp. 691-696
Author(s):  
EE Ikponmwosa ◽  
SO Ehikhuenmen
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Coarse Aggregate ◽  
Control Sample ◽  
Strength Properties ◽  
Waste Material ◽  
Partial Replacement ◽  
Replacement Level ◽  
Ceramic Waste ◽  
Curing Age

This paper reports the findings on an experimental investigation of the effect of partial replacement of coarse aggregate with ceramic waste on strength properties of concrete. Compressive strength tests were conducted using 150x150x150mm cube specimens, while tensile strength was investigated using 150x300mm cylinder specimens. Results of tests show that workability, density, compressive and flexural strength of concrete decreased with increase in ceramic waste content. The compressive strength at 90 days curing age for the control sample was 24.67 N/mm2. Compressive strength values at 90 days curing age for  25%, 50% and 75% replacement levels were 21.78 N/mm2, 19.85 N/mm2and 17.85 N/mm2 respectively. The decrease in density and strength was due to ceramic waste being lighter and more porous than normal coarse aggregate. Tensile strength of concrete with ceramic waste decline gradually from 8.39 N/mm2 to 6.13 N/mm2 for the control and 75% replacement samples respectively. This could be attributed to the water absorption capacity and external porcelain nature of the waste material. A production cost savings of 10.7% for 1:2:4 concrete mix was noted at 75% replacement level. This study concludes that ceramic waste could be used for both structural and non-structural works and recommends that beyond 75% replacement level, ceramic waste material should not be used in concrete structures where strength is the major consideration. http://dx.doi.org/10.4314/njt.v36i3.5

Electron microscopy of changes in lower extremity muscles in Duchenne muscular dystrophy

1991 ◽  
Vol 81 (6) ◽  
pp. 294-299
Author(s):  
J Atkin ◽  
VW Thompson ◽  
RB Boyd
Keyword(s):  
Electron Microscopy ◽  
Duchenne Muscular Dystrophy ◽  
Muscular Dystrophy ◽  
Genetic Disease ◽  
Extensor Digitorum Longus ◽  
Microscopic Level ◽  
Electron Microscopic Level ◽  
Electron Microscopic ◽  
Dystrophic Mice ◽  
Insight Into

Duchenne muscular dystrophy is a genetic disease with a sex-linked pattern of inheritance. This disease is present at birth, becomes symptomatic during early childhood, leads to inability to walk near the end of the first decade, and usually results in death by the end of the second decade. In this study, the extensor digitorum longus and soleus muscles from genetically dystrophic mice were examined at the electron microscopic level. The authors describe their results and discuss how these findings might provide some insight into one of the mechanisms of fiber necrosis in Duchenne muscular dystrophy.

Compression Test and Energy Absorption of Polyurethane/Multi Walled Carbon Nanotubes Foam Composites

2015 ◽  
Vol 819 ◽  
pp. 246-250 ◽  
Author(s):  
A.A. Sinar ◽  
Zainuddin Firuz ◽  
M.A. Nur Azni ◽  
A.Z. Nur Hidayah ◽  
Md Akil Hazizan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Compressive Strength ◽  
Energy Absorption ◽  
Palm Oil ◽  
Strength Properties ◽  
Pu Foam ◽  
Methylene Diphenyl Diisocyanate ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Pu Foams

This paper describes the effect of multi walled carbon nanotubes (MWCNTs) on the properties, especially the strength properties of rigid polyurethane (PU) foams produced from palm oil based polyol (POP) and methylene diphenyl diisocyanate (MDI). The foam composites in the ratio of 1:1.1 (wt. %) mixed at speed 2000 rpm. The addition of MWCNTs into PU foam are varies from 0 wt. % to 3 wt. %. The properties evaluated were compressive strength, density and energy absorption. Compressive strength of PU foam composites with 0.5% of MWCNTs showed the highest value 1.162 MPa of compressive strength compared to other foam composites. It was proved by modeling displacement nodal magnitude using NX Software (version 8.5). The density was increased 15.69 % with addition of 0.5 % MWCNTs into the PU foam. Increasing the amount of MWCNTs in PU foam was found to improve the energy absorption from 22.89 J for pure PU to 24.53 J for foam composites with 3 % MWCNTs.

Insight into the green doping of clinoptilolite with Na+ ions (Na+/Clino) as nanocatalyst in the conversion of palm oil into biodiesel; optimization and mechanism

2020 ◽  
Author(s):  
Mostafa Abukhadra ◽  
Mohamed Gameel Basyouny ◽  
Ahmed El-Sherbeeny ◽  
Mohammed El-Meligy ◽  
Monis Luqman
Keyword(s):  
Palm Oil ◽  
Na Ions ◽  
Insight Into

Low Temperature Joining of Copper by Ag Nanopaste: Studies on the Strength Behavior

2014 ◽  
Vol 925 ◽  
pp. 420-427 ◽  
Author(s):  
Susann Hausner ◽  
Sebastian Weis ◽  
Michael Elßner ◽  
Bernhard Wielage
Keyword(s):  
Thermal Properties ◽  
Low Temperatures ◽  
Base Material ◽  
Strength Properties ◽  
Scanning Calorimetry ◽  
Shape Distribution ◽  
Transmission Electron ◽  
Bulk Silver ◽  
Strength Behavior ◽  
Joining Strength

Nanoparticles exhibit a decrease in sintering and melting temperature with decreasing particle size. The utilization of this effect is of great interest for joining at low temperatures. First, the paper identifies possible applications for joining and their significance. Furthermore, a commercially available Ag nanopaste is characterized with respect to its thermal properties and strength behavior. Subsequently, it is qualified for joining at low temperatures. The shape, distribution and size of the nanoparticles are determined using transmission electron microscopy (TEM). The thermal behavior is characterized by differential scanning calorimetry (DSC) and thermogravimetry (TG). Furthermore, first examinations of strength properties were executed for the base material copper in order to characterize the influence of different process parameters on joining strength. The analyses show that the nanopaste has a great potential for joining at low temperatures. It is verified that the organic shell of the nanoparticles oxidatively decomposes at temperatures of about 410 °C followed by a sintering process. The sintered microstructure exhibits the thermal properties of bulk silver. It is also shown, that it is possible to produce joints at even lower temperatures of about 300 °C, whose thermal resistance and joint strength is significantly superior to conventional soldered joints.

Insight into the catalytic transformation of the waste products of some edible oils (corn oil and palm oil) into biodiesel using MgO/clinoptilolite green nanocomposite

2021 ◽  
Vol 500 ◽  
pp. 111340
Author(s):  
Mohamed Gameel Basyouny ◽  
Mostafa R. Abukhadra ◽  
Khaled Alkhaledi ◽  
Ahmed M. El-Sherbeeny ◽  
Mohammed A. El-Meligy ◽  
...  
Keyword(s):  
Palm Oil ◽  
Corn Oil ◽  
Edible Oils ◽  
Catalytic Transformation ◽  
Waste Products ◽  
Insight Into

scholarly journals Influence of Mortar Incorporating Silica Based Waste Material on the Formation of C-S-H and Mechanical Strength Properties

2014 ◽  
Vol 695 ◽  
pp. 647-650 ◽  
Author(s):  
Nafisa Tamanna ◽  
Norsuzailina Mohamed Sutan ◽  
Ibrahim Yakub ◽  
Delsye Teo Ching Lee ◽  
Ezzaq Farhan Ahmad
Keyword(s):  
Compressive Strength ◽  
Calcium Silicate ◽  
Calcium Silicate Hydrate ◽  
Glass Powder ◽  
Strength Properties ◽  
Particle Sizes ◽  
Replacement Level ◽  
Cement Ratio ◽  
Water To Cement Ratio ◽  
Partial Cement Replacement

Recent studies have been carried out to utilize waste glass in construction as partial cement replacement. This paper investigates the formation of Calcium Silicate Hydrate (C-S-H) and strength characteristics of mortar in which cement is partially replaced with glass powder by replacement level of 10%, 20% and 30%. Mortar cubes containing varying particle sizes in the ranges of 150-75μm, 63-38 μm and lower than 38 μm and in a water to cement ratio of 0.45 and 0.40 have been prepared. Replacement by 10% cement with glass powder reveals high compressive strength and produces more C-S-H at 28 days than other levels of replacement.

Sign in / Sign up

Export Citation Format

Share Document