Thesis Open Access

OPTIMIZATION OF SUPERPLASTICIZER DOSAGE AND EFFECTS WITH LOCALLY PRODUCED CEMENTS ON READY-MIX CONCRETE PROPERTIES

DANIEL MAMO


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{
  "@context": "https://schema.org/", 
  "@id": "https://doi.org/10.20372/nadre/4499", 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "ADDIS ABABA SCIENCE AND TECHNOLOGY UNIVERSITY", 
      "name": "DANIEL MAMO"
    }
  ], 
  "datePublished": "2020-01-14", 
  "description": "<p>Concrete is the most common building material that is used prominently in construction industry. It<br>\ncan be cast in any desired shape and fashion and should be workable whether on- site or in ready mix<br>\nconcrete production. To achieve better performance and desired proprieties of concrete, the use of<br>\nchemical admixtures is priceless choice in concrete production. While, there are common problems<br>\nfacing to optimize superplasticzer dosage with various types of cement to produce desirable<br>\nproperties of fresh and hardened concrete due to lack of practices in construction industry in our<br>\ncountry.<br>\nThe purpose of this research was determining optimum Superplasticizer dosage for desired<br>\nworkability using Marsh Cone Test at pre-determined water cement ratio. It was also analysis the<br>\neffect and influences of Superplasticizer dosage on concrete properties. Slump Cone test and testing<br>\nmachine were used to determine such properties of concrete. The first conclusion that was drawn<br>\nfrom the research was deciding optimum dosage on cement slurry which was prepared using different<br>\ntypes of Super plasticizer and Cements for variable water cement ratio. Secondly, the test were<br>\ncarried out to see effects of Superplasticizer dosage on improvement of workability and flowablity of<br>\nfresh concrete in specified doses. Also, it was also noticed changes of hardened concrete properties<br>\nusing mechanical tests.<br>\nUsing 0.45 and 0.40 water-cement ratio, optimum dosage of Superplasticizer (ODS) has found out,<br>\nwith respect to different Superplasticzers on different brand of cement paste mix.<br>\nSecondly, it also observed the effect of superplasticzer dosage for pre- determined quantity (0.5%,<br>\n1.0%, 1.5% and 2.0%) on hardened concrete strength in addition to fresh concrete characteristics.<br>\nThirdly, the demand of water reduced by 20%, 23%, 27% and 30% from total mix water using<br>\n0.5%,1.0%,1.5% and 2.0% of Superplasticizer respectively in concrete mix.<br>\nGenerally, Superplasticzer is playing vitally role to achieve better physical properties and quality of<br>\nconcrete, and resolving challenges in undesirable conditions during concrete work operations. Despite<br>\nthese facts, over dosage of SP were found to deteriorate the properties of concrete with indication of<br>\nlower compressive strength and higher porosity due to bleeding and segregation occurrences.</p>", 
  "headline": "OPTIMIZATION OF SUPERPLASTICIZER DOSAGE AND EFFECTS WITH LOCALLY PRODUCED CEMENTS ON READY-MIX CONCRETE PROPERTIES", 
  "identifier": "https://doi.org/10.20372/nadre/4499", 
  "image": "https://zenodo.org/static/img/logos/zenodo-gradient-round.svg", 
  "inLanguage": {
    "@type": "Language", 
    "alternateName": "eng", 
    "name": "English"
  }, 
  "keywords": [
    "Superplasticizer, dosage, cement, concrete strength, a ready-mixed concrete."
  ], 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "OPTIMIZATION OF SUPERPLASTICIZER DOSAGE AND EFFECTS WITH LOCALLY PRODUCED CEMENTS ON READY-MIX CONCRETE PROPERTIES", 
  "url": "https://nadre.ethernet.edu.et/record/4499"
}
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