scholarly journals Gamma Radiation as a Recycling Tool for Waste Materials Used in Concrete

Author(s):  
Gonzalo Martínez-Barrera ◽  
Liliana Ivette Ávila-Córdoba ◽  
Miguel Martínez-López ◽  
Eduardo Sadot Herrera-Sosa ◽  
Enrique Vigueras-Santiago ◽  
...  

Soil strength plays a vital role in the construction field. The main purpose of this project is to stabilize red soil with the help of various waste materials. The waste materials used are rice husk ash, lime, ground granulated blast furnace slag and coconut coir fiber. These waste materials have been mixed with the soil in the ratio 10%, 20% and 30% and subjected to various tests Specific Gravity Test, Sieve Analysis Test, Plasticity Index Test, Standard Proctor Test, Unconfined Compression test and California Bearing ratio test. A comparative increase in soil strength was found with all the waste materials. Thus, ultimately the soil is stabilized with the help of these waste materials.



2021 ◽  
Vol 926 (1) ◽  
pp. 012102
Author(s):  
M Carlina ◽  
Y Apriyanti ◽  
F Fahriani

Abstract In the construction of road construction, soil bearing capacity, such as the CBR value, needs to be considered. In clay soil, the CBR value of the soil is low, so that stabilization material can be added to its repair. In this study, the stabilization materials used were waste materials in the form of bagasse ash and eggshell powder. Variations in the mixture of bagasse ash mixture used in this study were 7%, 10%, and 13% plus 3% eggshell powder. Testing in this study includes testing moisture content, sieve analysis, specific gravity, consistency limits, compaction testing, and CBR. The soil classification system used is the Unified classification (USCS), a test guideline based on SNI. From the CBR soaked test, it was found that the CBR value of clay soil increased along with the increase in the percentage of bagasse ash plus 3% eggshell powder and the increase in collisions on the soil. The percentage increase in the CBR value of clay soil with a mixture of stabilization to clay soil is 92.303%. at 65 blow. So that bagasse ash and eggshell powder greatly affect the increase in the CBR value of clay soil.



2021 ◽  
Vol 41 (1) ◽  
Author(s):  
Samheri A. Almuradi

This study examines air, recycled plastic grains, fibers from rubber shreds and sawdust fibers as sound insulation materials to attenuate sound produced from continuous working lab fatigue test machine. These waste materials are filled in between a double glazed-aluminum framed box. The sound attenuation is tested at three studied 0.5, 1.0 and 1.5 m distances. Since the sound wave is propagated in three dimensions, the experimental work is employed in four upper, fronts, motor and sample fixture side directions. Moreover, the study is extended to examine temperature increase due to enclosing. Tests of sound level are carried out with closed and opened inlet and outlet designed slotting according to a box size. Gradual sound attenuation reaches 18, 20, 22 and 25% for air, plastic grains, rubber and sawdust fibers, respectively. The present work proves that waste materials are efficient in noise removal from sound sources. Also, they help the environment cleanliness from synthetic disposable bottles and tires as well as bio-wood wastes and assist the sustainability of earth.



Author(s):  
W T Talib Khalid ◽  
Obaidullah Qazi ◽  
A M Abdirizak ◽  
Raizal S. M. Rashid


Author(s):  
Afshin Turk ◽  
Bahram Mombeni ◽  
Sohrab Afrasiabi ◽  
Shabnam Ghanavatizadeh

Invention of Turk Salty Concrete is recommended for the GOTVAND Reservoir Dam, SW of Iran. This new type of concrete can be mixed with pure salty water to stabilize the salty domes. For the development of the mix, a ratio was defined as the proportion of the salty water mass to the mass of the materials used (clay, bentonite, cement type II). These proportions varied from 0.8 to 1.80 in the mix. The proposed mix presented a significant compressive strength when mechanically tested. The maximum bearing capacity was measured to be more than 10,500kpa. This is a significant capacity for salty cementation mixtures. In this paper, new mixture designs are reported developed by adding waste materials such as plastic bottles and cotton fibers. As the waste materials are detrimental to the environment and coastlines health, the inclusion of waste would have the added benefits of helping in the environmental issues. The results were found to be encouraging since it is shown that they improve durability, breaking stress and the modulus of toughness. Other research studies are currently underway examining the behavior of Turk Salt Mortar (TSM) by adding waste materials such as date palm tree fibers. TSM can be used in deep injection grouting for protection of shorelines that come in contact with sea water.



Author(s):  
T. Balasubramaniam ◽  
P.M. Sharan Karthik ◽  
S. Sureshkumar ◽  
M. Bharath ◽  
M. Arun


Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 218
Author(s):  
Marina Valentukeviciene ◽  
Ramune Zurauskiene

This research investigates how sorbents made from recycled waste materials affect the properties of water used to remove residues flushed from oil tanks transported by rail. The mineral sorbent was added to water following the flushing process. Water temperatures were maintained at 21 °C and 70 °C for a contact period of 30 min. The experiments demonstrated that: when the sorbent is active, turbidity removal efficiency was about 64%; color removal efficiency of 56% was obtained; and total iron concentration removal was approximately 68%. The effect of the characteristics of the materials on the adsorption capacity was evaluated using the removed amount of oil per one gram of every sorbent. It was found that straw sorbent oil adsorption capacity was up to 33 mg/g, peat sorbent 37 mg/g, and mineral sorbent 1.83 mg/g. The following were also measured during the experiment: temperature, pH, chemical oxygen usage, total iron concentrations, suspended matter, and oil concentrations. The findings show that recycled sorbents obtained from waste materials are environmentally sustainable and can be reused to treat water that has been used to flush oil transported in rail tanks.



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