Sustainable Implementation of Recycled Tire-Derived Aggregate as a Lightweight Backfill for Retaining Walls

2021 ◽  
Author(s):  
Ali Arefnia ◽  
Ali Dehghanbanadaki ◽  
Khairul Anuar Kassim
Keyword(s):  
Retaining Walls ◽  
Sustainable Implementation ◽  
Tire Derived Aggregate

Effect of Tire Derived Aggregate on Maximum Dry Density of Kaolin

2013 ◽  
Vol 66 (1) ◽  
Author(s):  
Ali Arefnia ◽  
Ehsan Momeni ◽  
Danial Jahed Armaghni ◽  
Khairul Anuar Kassim ◽  
Kamarudin Ahmad
Keyword(s):  
Retaining Walls ◽  
Optimum Moisture Content ◽  
Dry Density ◽  
Light Weight ◽  
Maximum Dry Density ◽  
British Standard ◽  
Wide Range ◽  
Tire Derived Aggregate ◽  
Geotechnical Problem ◽  
Insight Into

The use of Tire-Derived Aggregates (TDA) as highly permeable light weight material has been highlighted in different aspects of geotechnical engineering such as retaining walls, embankments and roads. In addition, in terms of human health and environmental matters, TDA usage is gaining attention. This paper gives an insight into the effect of TDA on the Maximum Dry Density (MDD) of Kaolin. A number of 273 compaction tests, were conducted on both Kaolin and Kaolin-TDA mixtures. Granular (5-8 mm), Granular (1-4 mm), Shredded (6-19 mesh) and Powdery (80 mesh) as various types of TDA, in different percentages from 0% to 60% by weight were mixed with Kaolin. Samples were compacted, using standard proctor procedures in accordance with British Standard. Findings show, that the MDD of Kaolin decreases within the range of 9% to 45%. Apart from that, based on the general results, it is observed that there is a significant change in the MDD of Kaolin-TDA mixture while the changes occurred in Optimum Moisture Content (OMC) is not remarkable. Depending on geotechnical problem, the wide range of the results could be used as a proper source for selecting the optimum percentage of Kaolin-TDA mixture. 

The Sustainable Implementation of a Master’s Programme in IT for Education in a Developing Context

2018 ◽  
Vol 39 (2) ◽  
Author(s):  
Johannes C Cronje ◽  
Emmanuel Arthur-Nyarko ◽  
Palmas Anyagre
Keyword(s):  
Information And Communication Technology ◽  
Communication Technology ◽  
Research Output ◽  
Institutional Support ◽  
Joint Implementation ◽  
Host Institution ◽  
University Administrators ◽  
Partner Institution ◽  
Sustainable Implementation ◽  
Information And Communication

This article gives an account of the joint implementation by the sponsor, the host institution and the partner institution of a master’s programme in Information and Communication Technology for Education at a leading African university in 2005. The success of the programme was such that it became a flagship programme at the institution. In the context of many failed joint implementations of such programmes, the question that arose and that prompted the writing of this article was, “Why did this programme succeed?” The literature indicates two elements that contribute to successful implementations: the individuals responsible for the course, and the support the institution gives. Interviews with the course coordinator, university administrators, alumni and current students, and an analysis of course documents and students’ research output revealed the nature of the activities of certain individuals and also of the institutional support factors that led to the success of the programme. Based on the study conducted, this article provides some suggestions that other implementers of similar projects may find useful.

Perencanaan dinding penahan tanah untuk menanggulangi kelongsoran pada kompleks peternakan ayam di Kecamatan Kandangan, Kediri, Jawa Timur

2018 ◽  
Vol 2 (2) ◽  
pp. 86
Author(s):  
Mila K. Wardani ◽  
Felicia T. Nuciferani ◽  
Mohamad F.N. Aulady
Keyword(s):  
Natural Disasters ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Total Height ◽  
Safe Limit ◽  
Soil Retaining Walls

Landslide one of the natural disasters that caused many victims. Therefore, the landslide need a construction that can withstand landslide force. This study aims to plan retaining walls to prevent landslides in the farm area in Kandangan Subdistrict, Kediri Regency. The method used is to use slide analysis which is used to plan the retaining wall. In addition the planning of soil containment walls u ses several methods as a comparison. The results of this study indicate that the planning of ordinary soil retaining walls is still not enough to overcome slides. The minimum SF value that meets the safe limit of landslide prevention is 1.541 in the combination of 1/3 H terracing and the number of gabions as many as 7 with a total height of 2- 3 m .

scholarly journals Black Hole Algorithm for Sustainable Design of Counterfort Retaining Walls

2020 ◽  
Vol 12 (7) ◽  
pp. 2767 ◽  
Author(s):  
Víctor Yepes ◽  
José V. Martí ◽  
José García
Keyword(s):  
Black Hole ◽  
Sustainable Design ◽  
Retaining Walls ◽  
The Other ◽  
Trade Off ◽  
Construction Company ◽  
Geometric Variables ◽  
The Stability ◽  
The Cost ◽  
Black Hole Algorithm

The optimization of the cost and CO 2 emissions in earth-retaining walls is of relevance, since these structures are often used in civil engineering. The optimization of costs is essential for the competitiveness of the construction company, and the optimization of emissions is relevant in the environmental impact of construction. To address the optimization, black hole metaheuristics were used, along with a discretization mechanism based on min–max normalization. The stability of the algorithm was evaluated with respect to the solutions obtained; the steel and concrete values obtained in both optimizations were analyzed. Additionally, the geometric variables of the structure were compared. Finally, the results obtained were compared with another algorithm that solved the problem. The results show that there is a trade-off between the use of steel and concrete. The solutions that minimize CO 2 emissions prefer the use of concrete instead of those that optimize the cost. On the other hand, when comparing the geometric variables, it is seen that most remain similar in both optimizations except for the distance between buttresses. When comparing with another algorithm, the results show a good performance in optimization using the black hole algorithm.

scholarly journals Analysis of Earth Retaining Walls Reinforced by Metallic Strip or Geogrid

2021 ◽  
Vol 794 (1) ◽  
pp. 012039
Author(s):  
A Suhendra ◽  
Sutikno ◽  
J L Lie ◽  
I G Mahardika
Keyword(s):  
Retaining Walls ◽  
Metallic Strip
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