scholarly journals Alternative fillers for use in slurry seal

2013 ◽  
Vol 9 (2) ◽  
pp. 182-186 ◽  
Keyword(s):  
Raw Materials ◽  
Low Cost ◽  
Mixing Time ◽  
Time Consistency ◽  
Cement Kiln ◽  
Asphalt Emulsion ◽  
Marble Dust ◽  
Slurry Seal ◽  
Kiln Dust ◽  
By Products

Slurry seal is applied for low-cost paving and surface maintenance. The principal materials used to create slurry seal are aggregates, asphalt emulsion, water and fillers like Portland cement (mainly), lime and other materials. This paper presents the use of alternative fillers instead of expensive and high consumed energy cement. These fillers are by-products and their increased deposits create a serious environmental problem. Fly ash, ladle furnace slag, cement kiln dust, marble dust were tested as fillers in slurry seal and results showed that they can be used producing slurry seal according to specifications. Mixing time, consistency, set time, cohesion, wet stripping, wet track abrasion and loaded wheel were the tests for checking of the characteristics of designed slurry seals. The use of these by-products will minimize their deposits and in a parallel manner will decrease the use of corresponding amount of cement saving raw materials and energy consumed for its production.

Incorporating of CKD in binder course cold asphalt emulsion mixtures

2021 ◽  
Author(s):  
Abbas Al-Hdabi ◽  
Mohammed Al-Jumaili ◽  
Huda Abdulzahra
Keyword(s):  
Mechanical Properties ◽  
Environmental Impact ◽  
Portland Cement ◽  
Manufacturing Industry ◽  
Energy Savings ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Asphalt Emulsion ◽  
Cement Manufacturing ◽  
Kiln Dust

AbstractCold asphalt emulsion mixtures are produced at ambient temperature and it have several advantages i.e., energy savings, safety and reducing CO2 emission during manufacturing and construction, reduction of adverse environmental impact. Cement kiln dust is a fine powdery substance with appearance similar to Portland cement that is generated as a by-product material of cement manufacturing industry. The aim of this research is addition of cement kiln dust instead of Portland cement as filler in asphalt emulsion mixtures. Cement kiln dust was added with 2, 4, 6, and 8% from total weight of aggregate to improve the mechanical properties and durability of this mixture. The results were very positive and encouraging, due to the improvement of the mechanical properties and durability of the mixtures.

Influence of Industrial By-Products on Shrinkage of Alkali-Activated Slag

2014 ◽  
Vol 1000 ◽  
pp. 137-140
Author(s):  
Vlastimil Bílek Jr. ◽  
Lukáš Kalina ◽  
Eva Bartoníčková ◽  
Tomáš Opravil
Keyword(s):  
Fly Ash ◽  
Partial Replacement ◽  
Cement Kiln ◽  
Hydration Products ◽  
Fluidized Bed Combustion ◽  
Alkali Activated Slag ◽  
Activated Slag ◽  
Kiln Dust ◽  
By Products ◽  
Alkali Activated

One of the highest shortages of alkali-activated slag (AAS) is high shrinkage, both autogenous and drying. One of the possibilities of lowering the shrinkage is partial replacement of slag by suitable admixtures, which can act for example through the forming of expansive hydration products. In this study, 0–50 % of slag was replaced by by-pass cement kiln dust and fluidized bed combustion fly ash. Promising results were obtained especially in the case of fly ash. By using admixtures at higher dosages compressive strengths were reduced.

scholarly journals Possible application of brewer’s spent grain in biotechnology

2013 ◽  
Vol 67 (2) ◽  
pp. 277-291 ◽  
Author(s):  
Jelena Pejin ◽  
Milos Radosavljevic ◽  
Olgica Grujic ◽  
Ljiljana Mojovic ◽  
Suncica Kocic-Tanackov ◽  
...  
Keyword(s):  
Animal Feed ◽  
Raw Materials ◽  
Low Cost ◽  
Cellulose Hydrolysis ◽  
Raw Material ◽  
Charcoal Production ◽  
Spent Grain ◽  
Pre Treatment ◽  
Beer Production ◽  
By Products

Brewer?s spent grain is the major by-product in beer production. It is produced in large quantities (20 kg per 100 liters of produced beer) throughout the year at a low cost or no cost, and due to its high protein and carbohydrates content it can be used as a raw material in biotechnology. Biotechnological processes based on renewable agro-industrial by-products have ecological (zero CO2 emission, eco-friendly by-products) and economical (cheap raw materials and reduction of storage costs) advantages. The use of brewer?s spent grain is still limited, being basically used as animal feed. Researchers are trying to improve the application of brewer?s spent grain by finding alternative uses apart from the current general use as an animal feed. Its possible applications are in human nutrition, as a raw material in biotechnology, energy production, charcoal production, paper manufacture, as a brick component, and adsorbent. In biotechnology brewer?s spent grain could be used as a substrate for cultivation of microorganisms and enzyme production, additive of yeast carrier in beer fermentation, raw material in production of lactic acid, bioethanol, biogas, phenolic acids, xylitol, and pullulan. Some possible applications for brewer?s spent grain are described in this article including pre-treatment conditions (different procedures for polysaccharides, hemicelluloses, and cellulose hydrolysis), working microorganisms, fermentation parameters and obtained yields. The chemical composition of brewer?s spent grain varies according to barley variety, harvesting time, malting and mashing conditions, and a quality and type of unmalted raw material used in beer production. Brewer?s spent grain is lignocellulosic material rich in protein and fibre, which account for approximately 20 and 70% of its composition, respectively.

Oilseed Cakes in the Food Industry: A Review on Applications, Challenges, and Future Perspectives

2021 ◽  
Vol 17 ◽  
Author(s):  
Amirhossein Abedini ◽  
Adel Mirza Alizadeh ◽  
Aida Mahdavi ◽  
S. Amirhossein Golzan ◽  
Mahla Salimi ◽  
...  
Keyword(s):  
Food Industry ◽  
Raw Materials ◽  
Low Cost ◽  
Palm Kernel ◽  
Poultry Feed ◽  
Food Sector ◽  
Novel Foods ◽  
Current Review ◽  
Wide Range ◽  
By Products

: By-products from the food sector now have a wide range of applications. Low-cost raw materials, followed by low-cost goods, are regarded as one of the sectors’ top goals. Because of its economic relevance, reduced price, and nutrients such as protein, fiber, carbs, and antioxidants, oilseed cakes (OCs) have found a desirable place in livestock and poultry feed. Furthermore, because the cake has the same desirable nutrients, its usage in the food business is unavoidable. However, its use in this sector is not simply for nutritious purposes and has it has different impacts on flavor, texture, color, and antioxidant qualities. Therefore, as a result of its desirable qualities, the cake can be more useful in extensive applications in the food business, as well as in the manufacture of supplements and novel foods. The current review looks at the reapplications of byproducts obtained from oilseeds (soybean, sunflower, sesame, canola, palm kernel, peanut, mustard, and almond) in the food sector in the future. Furthermore, allergenicity, toxicity, antinutritional compounds, and techniques of extracting cakes from oilseeds have been discussed.

scholarly journals Characterization of a new laboratory ceramic product from industrial by-products as raw materials and caustic magnesia as additive

2013 ◽  
Vol 47 (4) ◽  
pp. 2050
Author(s):  
V. Skliros ◽  
P. G. Lampropoulou ◽  
B. Tsikouras ◽  
K. Hatzipanagiotou ◽  
A. Christogerou ◽  
...  
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Low Cost ◽  
Amorphous Material ◽  
Bottom Ash ◽  
Ceramic Product ◽  
Ceramic Building ◽  
Experimental Firing ◽  
By Products ◽  
Caustic Magnesia

A new ceramic product is introduced by mixing caustic magnesia, produced in the laboratory from pure, high quality magnesite, and natural silt. Bottom ash and red mud, two well known environmentally hazardous industrial by-products, were also added in the mixture. After testing various recipes we concluded that addition of 5% caustic magnesia in the ceramic product greatly enhances its performance. Increase bonding of the ceramic microstructure is attributed to the formation of periclase necks, the concurrent formation of small quantities of amorphous material and the homogeneously distributed pores during the experimental firing of the mixture. Combined X-ray Diffractometry and Scanning Electron Microscopy of the ceramic product revealed the occurrence of unreactive phases, inherited by the raw materials, as well as newly-formed albite and magnesioferrite. Our results show that utilization of by-products may be important and environmental friendly materials in producing low cost ceramic building materials.

Fresh and hardened properties of self-compacting concrete containing of cement kiln dust

2019 ◽  
Vol 10 (1) ◽  
pp. 13 ◽  
Author(s):  
Ibrahim Saad Agwa ◽  
Omar Mohamed Omar Ibrahim
Keyword(s):  
Rotary Kiln ◽  
Raw Materials ◽  
Economic Problem ◽  
Cement Industry ◽  
Experimental Program ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Self Compacting Concrete ◽  
Cement Replacement ◽  
Kiln Dust

There are many wastes form the cement industry among them cement kiln dust (CKD). This residue is obtained after the process of burning the raw materials of cement in the rotary kiln where it is suctioned by fans during the clinker exit of the rotary kiln. Cement dust is a major environmental and economic problem in terms of high quality air pollution ranging from (20-100) microns and the proportions of chlorides, sulphates, alkali and lime living in a way that threatens the general health of human, as well as water pollution if the waste is discharged by rivers and waterways. This investigation’s main objective is to present the potential of using CKD as a cement replacement in self-compacting concrete (SCC). Eight mixes incorporating CKD with partial cement replacement of 0%, 5%, 10%, 20%, 30%, 40%, 50% and 75% in addition to control mix were investigated. The properties of all mixture were determined. Based on the experimental program results, it was found that SCC mixture incorporating 5% to 10% of CKD was almost similar to that of control mixture. The workability of SCC concrete decreased as CKD replacement increased. This established benefits of substituting cement by CKD to make SCC.

scholarly journals Use of industrial wastes for the synthesis of belite clinker

2020 ◽  
Vol 70 (339) ◽  
pp. 226 ◽  
Author(s):  
M. K. Enríquez ◽  
J. I. Tobón ◽  
J. H. Ramírez
Keyword(s):  
Ethylene Glycol ◽  
Rice Husk ◽  
Ordinary Portland Cement ◽  
Raw Materials ◽  
Industrial Wastes ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Paper Sludge ◽  
Phase Content ◽  
Kiln Dust

The synthesis of belite clinker was studied using industrial wastes: paper sludge, cement kiln dust and rice husk ashes, as substitutes for natural raw materials. Wastes were characterized by XRF, XRD and TG analysis. Different formulations were prepared to produce clinker at 1300, 1350 and 1400 °C. The clinker obtained was characterized using optical microscopy, XRD and f-CaO content determined by ethylene glycol method. Finally, the hydration of prepared cements with the clinkers was evaluated by isothermal microcalo­rimetry. It was found that by mixing paper sludge, cement kiln dust and rice husk ashes, it is possible to obtain belite clinker with f-CaO content below 0.5%, in clinkering temperatures between 1350 °C and 1400 °C without the use of natural raw materials. It was found that these cements have a high hydration kinetic, far above the rate of Ordinary Portland Cement, due mainly by the amorphous phase content in clinkers obtained.

Properties of Self-Compacting Cementitious Composite Materials Containing Cement Kiln Dust Powder

2020 ◽  
Vol 38 (6A) ◽  
pp. 879-886
Author(s):  
Ahmed S. Kadhim ◽  
Alaa A. Atiyah ◽  
Shakir A. Salih
Keyword(s):  
Composite Materials ◽  
Total Porosity ◽  
Cement Kiln Dust ◽  
Cement Kiln ◽  
Cementitious Composite ◽  
Cement Dust ◽  
Micro Cracks ◽  
Load Carrying ◽  
Sustainable Materials ◽  
Kiln Dust

This paper aims to investigate the influence of utilization micro cement kiln dust as a sustainable materials additive in order to reduce the voids and micro cracks in the cementitious mortar materials which cause a drastic reduction in the load carrying capacity of the element. Its therefore very important to decrease the pores and enhance the mechanical strength of the cementitious composite materials. In this article, the properties of self-compacting mortar containing micro cement dust additive was experimentally assessed. Micro cement dust powder was added to the self-compacting mortar in (1, 2, 3, 4 and 5 %) percentage by weight of cement to be used as cementitious sustainable materials. The experimental results indicated that the modification and enhancement of the workability of fresh mixture and the mechanical strengths of self-compacting mortar were increased as micro cement dust additives increases. Also; the water absorption and total porosity were decreased with increases of micro cement dust powder.

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