Thesis Open Access

Utilization of plastic waste & Bone Ash to Improve the Engineering properties of Expansive soils

Engidayu Labena Lachore


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{
  "@context": "https://schema.org/", 
  "@id": "https://doi.org/10.20372/nadre/20226", 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "Addis Ababa Science & Technology University", 
      "name": "Engidayu Labena Lachore"
    }
  ], 
  "datePublished": "2020-08-24", 
  "description": "<p>deals with an alternative local waste materials of cattle bone ash and plastic<br>\nbottle chips to improve the engineering properties of soil and minimize the environmental<br>\nimpacts. Cattle bone was burnt in open air and cooled to get bone ash (BA) and plastic<br>\nwaste bottles washed and cut into pieces to average size of 15mmx15mm. The soil sample<br>\nwas collected from the southern part of Addis Ababa around &lsquo;Koye feche&rsquo; and its index<br>\nand engineering properties was carried at natural state and when stabilized with 5, 7 and<br>\n10% of bone ash (BA) in dry weight. The California bearing ratio (CBR) test and CBR<br>\nswell was performed with optimum BA percentage and when plastic chips (PC) added at<br>\n0.4, 0.6 and 0.8% to the soil sample. Results of the tests showed that, the soil sample is A-<br>\n7-5(28) and MH as per AASHTO and USCS respectively. Due to addition of bone ash, the<br>\nplasticity index (PI), free swell, Linear shrinkage and CBR swell decreased from 45 to 27%<br>\n,122.2 to 44.4%, 23.3 to 19.5% and 9.02 to 0.87% respectively. This shows that the<br>\nimprovement in swelling property of soil. The specific gravity of natural soil reduced from<br>\n2.63 to 2.46 at 10 % bone ash contents. This is due to the light weight of BA. The optimum<br>\nCBR value obtained at 7% of bone ash content, which increased 31% from the original<br>\nsoil. The result also showed, 9.8% increment in CBR value at 0.6 % PC with optimum<br>\nbone ash content and 11.2% reduction in CBR swell at 10%PC. The improvements in CBR<br>\nof expansive soil is adequate to use as subgrade material as per Ehiopian Road Authority.<br>\nBoth bone ash and plastic chips are a good stabilizer. Furthermore, utilizing wastes for<br>\ngeotechnical purpose creates one of alternative solid waste management.</p>", 
  "headline": "Utilization  of plastic waste & Bone Ash to Improve the  Engineering  properties of Expansive soils", 
  "identifier": "https://doi.org/10.20372/nadre/20226", 
  "image": "https://zenodo.org/static/img/logos/zenodo-gradient-round.svg", 
  "inLanguage": {
    "@type": "Language", 
    "alternateName": "eng", 
    "name": "English"
  }, 
  "keywords": [
    "Bone ash, CBR, USCS, Expansive soil, Stabilization, Plastic chips"
  ], 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Utilization  of plastic waste & Bone Ash to Improve the  Engineering  properties of Expansive soils", 
  "url": "https://nadre.ethernet.edu.et/record/20226"
}
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