scholarly journals High strength composites from low-value animal coproducts and industrial waste sulfur

RSC Advances ◽  
2022 ◽  
Vol 12 (3) ◽  
pp. 1535-1542
Author(s):  
Claudia V. Lopez ◽  
Ashlyn D. Smith ◽  
Rhett C. Smith
Keyword(s):  
Sunflower Oil ◽  
Canola Oil ◽  
Industrial Waste ◽  
High Strength ◽  
Plant Oils ◽  
Brown Grease

Herein we report high strength composites prepared by reaction of sulfur, plant oils (either canola oil or sunflower oil) and brown grease.

scholarly journals Application of the C-S-H Phase Nucleating Agents to Improve the Performance of Sustainable Concrete Composites Containing Fly Ash for Use in the Precast Concrete Industry

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6514
Author(s):  
Grzegorz Ludwik Golewski ◽  
Bartosz Szostak
Keyword(s):  
Fly Ash ◽  
Industrial Waste ◽  
Precast Concrete ◽  
High Strength ◽  
Nucleating Agents ◽  
Negative Effects ◽  
Sustainable Concrete ◽  
Wide Range ◽  
Time Periods ◽  
Positive Effect

Siliceous fly ash (FA) is the main additive to currently produced concretes. The utilization of this industrial waste carries an evident pro-ecological factor. In addition, such actions have a positive effect on the structure and mechanical parameters of mature concrete. Unfortunately, the problem of using FA as a Portland cement replacement is that it significantly reduces the performance of concretes in the early stages of their curing. This limits the possibility of using this type of concrete, e.g., in prefabrication, where it is required to obtain high-strength composites after short periods of curing. In order to minimize these negative effects, this research was undertaken to increase the early strength of concretes with FA through the application of a specifically formulated chemical nano-admixture (NA) in the form of seeds of the C-S-H phase. The NA was used to accelerate the strength growth in concretes. Therefore, this paper presents results of tests of modified concretes both with the addition of FA and with innovative NA. The analyses were carried out based on the results of the macroscopic and microstructural tests in five time periods, i.e., after 4, 8, 12, 24 and 72 h. The results of tests carried out with the use of NA clearly indicate the possibility of using FA in a wide range of management areas in sustainable concrete prefabrication.

scholarly journals EFFECT OF DEEP-FAT FRYING ON CANOLA OIL, PALMOLEIN AND SUNFLOWER OIL BLENDS: B) BIOLOGICALAND NUTRITIONAL STUDIES

2016 ◽  
Vol 7 (2) ◽  
pp. 81-96
Author(s):  
W. EL-Reffaei ◽  
A. EL-Sebeay ◽  
Hanan EL-Ghandour ◽  
Eman Ragheb ◽  
S. Badr
Keyword(s):  
Sunflower Oil ◽  
Canola Oil ◽  
Deep Fat Frying ◽  
Oil Blends ◽  
Nutritional Studies

scholarly journals Ability of phenolic acids to protect naturally present alfa-tocopherol during the heating of plant oils  

2012 ◽  
Vol 30 (No. 4) ◽  
pp. 351-357 ◽  
Author(s):  
Z. Réblová ◽  
J. Fišnar ◽  
D. Tichovská ◽  
M. Doležal ◽  
K. Joudalová
Keyword(s):  
Fatty Acids ◽  
Antioxidant Activity ◽  
Phenolic Acids ◽  
Sunflower Oil ◽  
Phenolic Acid ◽  
Half Life ◽  
Tocopherol Content ◽  
Plant Oils ◽  
Hot Plate ◽  
Experimental Conditions

The ability of phenolic acids (ferulic, gallic, protocatechuic, and sinapic; 600 mg/kg) to protect naturally present a-tocopherol was tested during the heating of sunflower oil on a hot plate set at 120, 150, 180, 210, or 240°C, and during the heating of rapeseed, olive and soybean oils on a hot plate set at 180°C. In all the studied conditions, a-tocopherol was significantly protected only by gallic acid. This phenolic acid prolonged the half-life of a-tocopherol (calculated as the time needed for the a-tocopherol content to decrease to 50% of the original value) typically two- to four-fold. Hence the ability of phenolic acids to protect a-tocopherol in bulk oils does not markedly depend on the experimental conditions as is seen in antioxidant activity, i.e. in the ability of antioxidants to protect fatty acids.  

scholarly journals Heating of Plant Oils-Fatty Acid Reactions versus Tocopherols Degradation

2009 ◽  
Vol 27 (Special Issue 1) ◽  
pp. S185-S187 ◽  
Author(s):  
Z. Réblová ◽  
D. Tichovská ◽  
M. Doležal
Keyword(s):  
Fatty Acid ◽  
Soybean Oil ◽  
Olive Oil ◽  
Vegetable Oils ◽  
Sunflower Oil ◽  
Rapeseed Oil ◽  
Degradation Rate ◽  
Plant Oils ◽  
Oil Sunflower ◽  
High Degradation Rate

Relationship between polymerised triacylglycerols formation and tocopherols degradation was studied during heating of four commercially accessible vegetable oils (rapeseed oil, classical sunflower oil, soybean oil and olive oil) on the heating plate with temperature 180°C. The content of polymerised triacylglycerols 6% (i.e. half of maximum acceptable content) was achieved after 5.3, 4.2, 4.1, and 2.6 hours of heating for olive oil, soybean oil, rapeseed oil and sunflower oil, respectively, while decrease in content of total tocopherols to 50% of the original content was achieved after 3.4, 1.6, 1.3, and 0.5 hours of heating for soybean oil, rapeseed oil, sunflower oil and olive oil, respectively. Because of the high degradation rate of tocopherols, decrease in content of total tocopherols to 50% of the original content was achieved at content of polymerised triacylglycerols 0.6%, 1.9%, 2.8% and 4.9% for olive oil, rapeseed oil, sunflower oil and soybean oil, respectively, i.e. markedly previous to the frying oil should be replaced.

Evaluation of antioxidant properties of the different tissues of vine tea ( Ampelopsis grossedentata ) in stripped canola oil and sunflower oil

2020 ◽  
Vol 85 (4) ◽  
pp. 1082-1089 ◽  
Author(s):  
Caihua Jia ◽  
Mingxing Zhang ◽  
Weibo Ma ◽  
Jinghuan Li ◽  
Siming Zhao ◽  
...  
Keyword(s):  
Sunflower Oil ◽  
Canola Oil ◽  
Antioxidant Properties ◽  
Ampelopsis Grossedentata ◽  
Different Tissues

scholarly journals Performance of SIFCON with Steel Slag

10.29007/jxp9 ◽  
2018 ◽  
Author(s):  
Shashi Kant Sharma ◽  
Aniruddha Chopadekar ◽  
Samarth Bhatia
Keyword(s):  
Industrial Waste ◽  
High Performance ◽  
High Performance Concrete ◽  
Steel Slag ◽  
High Strength ◽  
Partial Replacement ◽  
Experimental Program ◽  
Fine Aggregate ◽  
Unique Type ◽  
The Matrix

Slurry infiltrated fibrous concrete (SIFCON) is a new and unique type of high performance concrete invented by Lankard in 1979, containing high percentage of fiber about 6% to 20% by volume. SIFCON possesses high strength as well as large ductility and has excellent potential for structural application. The matrix in SIFCON has no coarse aggregate but high cementitious content. The aim of study is to evaluate the performance of SIFCON mortar with lower fiber percentage and to minimize the fine aggregate usage by replacing it with industrial waste i.e. steel slag. Thereby, it also helps in effective disposal of industrial waste and helps in mitigating environmental pollution. The main objective of this study is to determine the effect of partial replacement of sand with steel slag on the mechanical properties of SIFCON mortar. The experimental program was carried out with 2%, 3% and 4% of fiber content by volume combined with replacement of sand by steel slag in proportion of 10% and 20% by weight. For this purpose, compressive strength, flexural strength, split tension and impact strength of SIFCON specimens were tested after 7 and 28 days of curing, yielding positive results.

scholarly journals Effects of waste glass and waste marble on mechanical and durability performance of concrete

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jawad Ahmad ◽  
Fahid Aslam ◽  
Rebeca Martinez-Garcia ◽  
Jesús de-Prado-Gil ◽  
Shaker M. A. Qaidi ◽  
...  
Keyword(s):  
Industrial Waste ◽  
Mechanical Performance ◽  
High Strength ◽  
Waste Glass ◽  
Waste Materials ◽  
Fine Aggregate ◽  
Concrete Technology ◽  
Split Tensile Strength ◽  
Concrete Production ◽  
Marble Waste

AbstractIndustrial waste has been rapidly increased day by day because of the fast-growing population which results environmental pollutions. It has been recommended that the disposal of industrial waste would be greatly reduced if it could be incorporated in concrete production. In cement concrete technology, there are many possibilities to use waste materials either as cement replacement or aggregate in concrete production. Two major industrials waste are glass and marble waste. The basic objective of this investigation is to examine the characteristics of concrete waste glass (WG) as binding material in proportions 10%, 20% and 30% by weight of cement. Furthermore, to obtain high strength concrete, waste marble in proportion of 40%, 50% and 60% by weight cement as fine aggregate were used as a filler material to fill the voids between concrete ingredients. Fresh properties were evaluated through slump cone test while mechanical performance was evaluated through compressive strength and split tensile strength which were performed after 7 days, 28 days and 56 days curing. Results show that, workability of concrete decreased with incorporation of waste glass and marble waste. Furthermore, mechanical performance improved considerably up 20% and 50% substitution of waste glass and waste marble respectively. Statistical approach of Response Surface Methodology (RSM) was used optimize both waste materials in concrete. Results indicate better agreement between statistical and experimental results.

scholarly journals Effect of Catalyst Preparation on the Selective Hydrogenation of Vegetable Oil Over Low Percentage Pd/Diatomite Catalysts

2014 ◽  
Vol 17 (1) ◽  
pp. 33 ◽  
Author(s):  
K. Toshtay ◽  
A.B. Auyezov ◽  
Zh.A. Bizhanov ◽  
A.T. Yeraliyeva ◽  
S.K. Toktasinov ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Fatty Acids ◽  
Surface Area ◽  
Sunflower Oil ◽  
Canola Oil ◽  
Substantial Reduction ◽  
Solid Fat Content ◽  
Health Concern ◽  
Acid Activation ◽  
Adsorption Method

Hydrogenated vegetable oils contain high contents of <em>trans</em>-fatty acids. Because of the increased health concern about <em>trans</em>-fatty acids, new hydrogenations have been studied to seek ways for substantial reduction of the <em>trans</em>-fatty acids in the hydrogenated products. In this research, activated diatomite has distinctive properties as a support for hydrogenation catalysts. Investigation of textural properties of raw and purified diatomite samples reveals that during acid activation surface area increases significantly. Although, acid activation of diatomite is a commonly chemical modification to enhance its adsorption capacity. We are preparing adsorption method to synthesize low percentage 0.2% of Pd/Diatomite catalyst. The activated diatomite and the obtained catalyst was characterized by using thermogravimetric analysis (TGA), Brunauer-Emmett-Teller surface area analysis (BET), scanning electron microscopy (SEMEDAX), transmission electron microscopy (TEM). It was utilized for hydrogenation of sunflower oil using the Parr reactor in laboratory testing a variety of temperature (70, 90, 110 ºC) and canola oil in industrial testing, at temperature 90 ºC and 0.5 MPa pressure and compared to commercial nickel catalyst (Pricat-9910) at 150 ºC, 0.5 MPa pressure agitation of 800 rpm for 160 min. The changes in iodine value, fatty acid composition, <em>trans</em>-fatty acids, melting point and solid fat content were investigated on partial hydrogenated sunflower oil and canola oil. The experimentally obtained results show that the palladium catalyst is the most active compared to the commercial catalyst. Lower hydrogenation temperature used 0.2% Pd/Diatomite catalyst, significant reducing the formation of <em>trans</em>-content by 13% in fat.

Geopolymer Sourced with Fly Ash and Industrial Aluminum Waste for Sustainable Materials

2020 ◽  
pp. 676-696
Author(s):  
Sujitra Onutai ◽  
Sirithan Jiemsirilers ◽  
Takaomi Kobayashi
Keyword(s):  
Fly Ash ◽  
Industrial Waste ◽  
Raw Materials ◽  
Acid Resistance ◽  
High Strength ◽  
Microwave Oven ◽  
Silicate Material ◽  
High Acid ◽  
Alumino Silicate ◽  
Geopolymer Cement

Geopolymer is alumino-silicate material which can apply for many applications due to that geopolymers have several attractive properties of high strength, low permeability, high acid resistance, hazardous materials, and immobilization of toxic materials. This chapter presents synthesis of the dense and the porous structures of geopolymer by using fly ash and industrial waste as the raw materials. Aluminum hydroxide waste (Al-waste) and fly ash (FA) were used to synthesis the dense geopolymers for cement materials. The Al-waste based geopolymer influenced the geopolymer strength, when sodium hydroxide (NaOH) concentration was changed at different curing temperatures. As preliminary microwave oven was exposed in the lower NaOH paste of geopolymer, the successful synthesis of geopolymer cement was obtained. In addition, porous fly ash geopolymers was achieved using a household microwave oven. The geopolymer paste was cured within 1 min by using a microwave oven at different output power. Porous geopolymers were formed immediately as ued at 850 W power of the microwave oven.

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