Study of a Discrete Randomly Distributed Fiber on the Tensile Strength Improvement of Microbial-Induced Soil Stabilization

2017 ◽  
Author(s):  
Lin Li ◽  
Mingdong Li ◽  
Ubani Ogbonnaya ◽  
Kejun Wen ◽  
Yingzi Xu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Soil Stabilization ◽  
Strength Improvement

APPLICATION OF OIL PALM EMPTY FRUIT BUNCH FIBERS IN STRENGTH IMPROVEMENT AS A FIBER REINFORCED CONCRETE

2017 ◽  
Vol 25 (3) ◽  
pp. 161-170
Author(s):  
Henny Lydiasari ◽  
Ari Yusman Manalu ◽  
Rahmi Karolina
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Crack Length ◽  
Oil Palm ◽  
Fiber Reinforced Concrete ◽  
Structural Concrete ◽  
Empty Fruit Bunches ◽  
Construction Products ◽  
By Products ◽  
Strength Improvement

The potency of oil palm empty fruit bunches (OPEFB) fibers as one of the by-products of processing oil palm is increasing significantly so that proper management is needed in reducing environmental impact. One of the utilization of OPEFB fibers is as a substitution material in construction which usually the material is derived from non-renewable mining materials so that the number is increasingly limited. Therefore, it is necessary to study to know the performance of OPEFB fiber in making construction products especially concrete. In this case, the experiment was conducted using experimental method with variation of fiber addition by 0%, 10%, 15%, 20%, 25%, and 30%. Each specimen was tested by weight, slump value, compressive strength, tensile strength, elasticity and crack length. As the results, the variation of fibers addition by 10%, decrease of slump value is 7%, concrete weight is 3% and crack length is 8% while increase of the compressive strength is 2.7% and the modulus of elasticity is 33.3% but its tensile strength decreased insignificantly by 0.05% . Furthermore, the addition of fibers above 10% to 30% decreased compressive strength is still below 10% and tensile strength below 2% while the weight of concrete, slump value and crack length decreased. Therefore, the addition of 10% can replace the performance of concrete without fiber but the addition of above 10% can still be used on non-structural concrete.

Effect of Li on Mechanical Properties and Electrical Conductivity of the Al–Zn–Cu–Mg Based Alloys

2021 ◽  
Vol 21 (9) ◽  
pp. 4897-4901
Author(s):  
Hyo-Sang Yoo ◽  
Yong-Ho Kim ◽  
Hyeon-Taek Son
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Grain Size ◽  
Tensile Strength ◽  
Spherical Particles ◽  
Al Alloy ◽  
High Angle ◽  
Average Grain Size ◽  
Strength Improvement ◽  
Li Content

In this study, changes in the microstructure, mechanical properties, and electrical conductivity of cast and extruded Al–Zn–Cu–Mg based alloys with the addition of Li (0, 0.5 and 1.0 wt.%) were investigated. The Al–Zn–Cu–Mg–xLi alloys were cast and homogenized at 570 °C for 4 hours. The billets were hot extruded into rod that were 12 mm in diameter with a reduction ratio of 38:1 at 550 °C. As the amount of Li added increased from 0 to 1.0 wt.%, the average grain size of the extruded Al alloy increased from 259.2 to 383.0 µm, and the high-angle grain boundaries (HGBs) fraction decreased from 64.0 to 52.1%. As the Li content increased from 0 to 1.0 wt.%, the elongation was not significantly different from 27.8 to 27.4% and the ultimate tensile strength (UTS) was improved from 146.7 to 160.6 MPa. As Li was added, spherical particles bonded to each other, forming an irregular particles. It is thought that these irregular particles contribute to the strength improvement.

scholarly journals Soil Stabilization using Waste Cotton Clothes Coated with Bitumen

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Prathamesh Wagare ◽  
Shubham Sutar ◽  
Shruthi Virapannanavar
Keyword(s):  
Tensile Strength ◽  
Soil Stabilization ◽  
Natural Fibers ◽  
Cost Effective ◽  
Strength Characteristics ◽  
Cotton Cloth ◽  
High Tensile Strength ◽  
Reinforcement Material ◽  
Effective Reinforcement ◽  
Properties Of Soil

Properties of soil can be enhanced by using different stabilization techniques. Cotton clothes have a high tensile Strength as compare to natural fibers. In this study waste cotton clothes coated with bitumen were used for stabilization of soil. As waste cotton clothes are cost effective and eco-friendly, they can be modified and used as effective reinforcement material/stabilizer. Experiment was carried out by adding 1% and 2% of waste cotton cloth coated with bitumen to improve its strength characteristics.

scholarly journals Mechanical Properties of Concrete and Hollow Concrete Blocks Containing Steel and Nylon Fibres

2019 ◽  
Vol 8 (6) ◽  
pp. 3162-3168
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Steel Fibre ◽  
Concrete Block ◽  
Concrete Mix ◽  
Different Types ◽  
Concrete Blocks ◽  
Nylon Fibre ◽  
Strength Improvement

An attempt has been made in this paper to study the effect on the mechanical properties of the concrete and hollow concrete block when different types of fibres were added to the mix. The two different types of fibres added include Steel fibres with hooked end and of length 60mm at five different fibre ratios of 2.5%, 2.75%, 3.0%, 3.25% and 3.5% and Nylon fibres having a length of 18mm at the content of 0.5%, 0.75%, 1.0%, 1.25% and 1.50%. The concept of fibre hybridization was also analyzed and the effect was studied by preparing concrete mix with various percentage combinations of steel and nylon fibres at a total fibre ratio of 3% by weight of cement. The investigation focused on finding the optimum values of fibres to be added and also carried out the compressive strength and tensile strength of concrete with and without fibres. The compressive strength of hollow concrete blocks made with and without fibres was also analyzed. The samples of concrete and hollow concrete blocks were cast and immersed in water for a curing period of 28 days. The results on strength of fibre added concrete and hollow concrete block obtained was compared with the control mix result and the study concludes that the steel fibre and nylon fibre added concrete and hollow concrete block showed an improvement in the mechanical properties for each fibre ratio considered. Out of the various combinations of steel and nylon fibre tried, the best compressive strength improvement was exhibited by the concrete mix with 3% of the steel fibre without any addition of nylon fibres while the best tensile strength improvement was shown by the concrete mix with 2.25% of steel fibre and 0.75% of nylon fibre.

scholarly journals The Relation Tensile Strength And Flexibility Of Bamboo For Soil Stabilization

2021 ◽  
Vol 4 (1) ◽  
pp. 11
Author(s):  
Khoiriya Latifah ◽  
Joko Siswanto ◽  
Bambang Supriyadi ◽  
Carsoni C
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Soil Stabilization ◽  
Strength Properties ◽  
High Compressive Strength ◽  
Maximum Tensile Strength ◽  
The World ◽  
Bamboo Fibers ◽  
The Relationship

Bamboo is an abundant material and easily available in Indonesia. In addition to having high compressive strength and tensile strength as well as ease of obtaining and low prices, bamboo is a consideration and focus in developing in the world of construction today. In this study, bamboo is used for soil stabilization, where bamboo is used in the form of fibre. This research focuses on the strength properties of various types of bamboo. The focus is to investigate the relationship between the maximum tensile strength of bamboo and the flexibility of bamboo in soil stabilization. This is very important, because bamboo fibers used for soil stabilization rely on their tensile strength rather than their compressive strength. Thus, the optimum tensile strength and flexibility of bamboo must be of particular concern. From the results of the study of the tensile strength of two types of bamboo, namely Apus Bamboo and Java Bamboo, the Apus Bamboo results were found to have a higher tensile strength of 225.57 mpa with maximum flexibility of 19.99 mm and 43.76 mpa for tensile strength of Javanese Bamboo with a level of flexibility of 10.26 mm.

Research on the Strength Improvement of 7A04 Aluminum Alloy

2012 ◽  
Vol 488-489 ◽  
pp. 19-21
Author(s):  
Chao Jue Yi ◽  
Peng Cheng Zhai ◽  
Li Zhou Dong ◽  
Qi Hao Fu
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Grain Refinement ◽  
Cryogenic Treatment ◽  
The Impact ◽  
Strength Improvement

By using cryogenic treatment on 7A04 aluminum alloy tested with micrographic analysis and mechanical properties test, we studied the impact on mechanical properties of 7A04 aluminum alloy The results showed that the strength of 7A04 aluminum alloy could be highly increased and the grain size would be reduced in the process through being treated in 480°C/80min + aging in 120°C/4h + cryogenic treatment + aging at 120°C/16h.7A04 aluminum alloy are more fully recrystallized to grain refinement and the tensile strength of it can be increased to 720Mpa after the treatment.

Tensile Strength Improvement of Concrete Slabs Using Polyurea Spray

2021 ◽  
Vol 26 (1) ◽  
pp. 04020048
Author(s):  
Muhammad Rizwan ◽  
Shaheer Khaleequzzaman ◽  
Uzair Khaleeq uz Zaman ◽  
Syed Aqib Fida ◽  
Amjed Shahzad ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Concrete Slabs ◽  
Strength Improvement
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