Influence of Morphology on Angle of Internal Friction in Slags | Chapter 9 | Recent Progress in Science and Technology Vol. 9

 The depiction of any granular material is contingent upon its semantic parameters, as well as allure physical and chemical characteristics. Slags from the iron and steel commerces are used for this study, and their morphology is distinguished to their angle of internal friction. These limits are determined using ImageJ operating system on slag samples. The semantic parameters are roundness, fullness, and surface roughness. According to the literature, atoms with lengthened, angular, and rough surfaces proper to be more resistant to shearing than round, round, and smooth particles. This paper decides that roundness values in slags, alternatively sphericity, are in trend accompanying friction angle. It is also noticed that regardless of fullness or roundness, the angle of internal resistance remains within a narrow range. Certain pieces, which are dependent on something crushing under load, will not behave as anticipated based on their shape parameters. As a result, the shape limits alone can be insufficient to adequately show the frictional characteristics. ImageJ is a 2D particle reasoning programme. Even if 3D analysis is performed, skilled is no guarantee that the particle will properly as expected because piece orientation also plays a meaningful role in allure mechanical behaviour.

Author(s) Details:

J. Logeshwari,
Department of Civil Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai- 600062, India.

P. V. Sivapullaiah,
Department of Civil Engineering, Indian Institute of Science, Bangalore-560012, India.

Please see the link here: https://stm.bookpi.org/RPST-V9/article/view/10270

Interrelationship between Safe Bearing Capacity and Angle of Internal Friction of Pilani Soil | Chapter 12 | New Ideas Concerning Science and Technology Vol. 1

 In order to obtain a simpler connection between the secure bearing potential of cohesion-less soil and the angle of internal friction, the current analysis was carried out using the theory of least squares. Secure soil bearing potential is used in the construction of foundations. Shallow foundations are used extensively in the form of continuous strips. Standard calculations are required to estimate the secure bearing ability of the shallow foundations of the soil supporting strip. For cohesion-less soil, it appears from these equations that there is a clear dependency of bearing capability on the angle of internal friction. This relationship was developed on the basis of the correlation observed between the safe bearing ability and the inner friction angle of soil samples collected from Birla Institute of Technology & Science; Pilani campus within 100 km. By analysing 20 separate cohesion-less soil samples, correlation was established and checked for 19 other cohesion-less soil samples. Analytical equations have been developed in the form of both linear and quadratic polynomials. The correlation coefficient was found to be 0.869319 & 0.942516 between the real and estimated value of safe bearing potential for linear and quadratic polynomials. It can be argued that the approach presented in this study is of significant importance. The calculated safe bearing capacity value using equations built in the current study is for 2 metres of wide strip footing with 2 metres of embedment depth. The loading state is vertical with no impact of eccentricity.

Author(s) Details

Prof. Kamalesh Kumar

Department of Civil Engineering, Birla Institute of Technology & Science, Pilani, – 333031, Rajasthan, India.

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Water Content Effect on Shear Strength Parameters in Coir Fiber Reinforced Pilani Soil: Recent Observations | Chapter 1 | Recent Developments in Engineering Research Vol.1

Recently, much work has been done on strength deformation behaviour of fiber reinforced soil and it has been established beyond doubt that addition of fiber in soil improves the overall engineering performance of soil. Fiber reinforced soil is effective in all types of soils (i.e. sand, silt and clay). Use of natural fibers in civil engineering construction practice is often advantageous as they are cheap, locally available, biodegradable, and ecofriendly. Among the available natural fibers (jute, coir, bamboo, etc.), coir is produced in large quantities in South Asian countries, such as India, Ceylon, Indonesia, Philippines, etc. and has better mechanical properties, such as tensile strength. In this paper, results on the cohesion and angle of internal friction behavior (obtained from direct shear testing) of local soil reinforced with coir fibers are presented at varied water contents. Soil sample reinforced with randomly distributed coir fibers of 2.5 cm length and 2.85 mm to 0.64 mm average diameter range (measured using screw gauge) were made for direct shear testing at 0.5% fiber content. Testing was done at four different water contents. The results show that cohesion increased and angle of internal friction decreased with increase in water content. Unreinforced in-situ local soil has negligible cohesion and angle of internal friction around 280 under similar direct shear testing conditions. Practical significance of the study has also been discussed. 

Author (s) Details

Kamalesh Kumar
Department of Civil Engineering, Birla Institute of Technology and Science, Pilani - 333031, Rajasthan, India.

Gada Vivek
Department of Civil Engineering, Birla Institute of Technology and Science, Pilani - 333031, Rajasthan, India.

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