Thesis Open Access

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

DANIEL MAMO


MARC21 XML Export

<?xml version='1.0' encoding='UTF-8'?>
<record xmlns="http://www.loc.gov/MARC21/slim">
  <leader>00000nam##2200000uu#4500</leader>
  <controlfield tag="001">4499</controlfield>
  <datafield tag="502" ind1=" " ind2=" ">
    <subfield code="c">ADDIS ABABA SCIENCE AND TECHNOLOGY</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">publication</subfield>
    <subfield code="b">thesis</subfield>
  </datafield>
  <controlfield tag="005">20200213093454.0</controlfield>
  <datafield tag="542" ind1=" " ind2=" ">
    <subfield code="l">open</subfield>
  </datafield>
  <datafield tag="100" ind1=" " ind2=" ">
    <subfield code="a">DANIEL MAMO</subfield>
    <subfield code="u">ADDIS ABABA SCIENCE AND TECHNOLOGY UNIVERSITY</subfield>
  </datafield>
  <datafield tag="540" ind1=" " ind2=" ">
    <subfield code="u">http://www.opendefinition.org/licenses/cc-by</subfield>
    <subfield code="a">Creative Commons Attribution</subfield>
  </datafield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="s">3922407</subfield>
    <subfield code="u">https://nadre.ethernet.edu.et/record/4499/files/OPTIMIZATION OF SUPERPLASTICIZER DOSAGE AND  EFFECTS WITH LOCALLY PRODUCED CEMENTS.pdf</subfield>
    <subfield code="z">md5:1f0a833159e7f609c8f4c763f89f2332</subfield>
  </datafield>
  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">OPTIMIZATION OF SUPERPLASTICIZER DOSAGE AND EFFECTS WITH LOCALLY PRODUCED CEMENTS ON READY-MIX CONCRETE PROPERTIES</subfield>
  </datafield>
  <datafield tag="260" ind1=" " ind2=" ">
    <subfield code="c">2020-01-14</subfield>
  </datafield>
  <datafield tag="041" ind1=" " ind2=" ">
    <subfield code="a">eng</subfield>
  </datafield>
  <datafield tag="650" ind1="1" ind2="7">
    <subfield code="a">cc-by</subfield>
    <subfield code="2">opendefinition.org</subfield>
  </datafield>
  <datafield tag="773" ind1=" " ind2=" ">
    <subfield code="a">10.20372/nadre/4498</subfield>
    <subfield code="i">isVersionOf</subfield>
    <subfield code="n">doi</subfield>
  </datafield>
  <datafield tag="024" ind1=" " ind2=" ">
    <subfield code="a">10.20372/nadre/4499</subfield>
    <subfield code="2">doi</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">user-aastu</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">user-nadre</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Superplasticizer, dosage, cement, concrete strength, a ready-mixed concrete.</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">BELACHEW ASTERAY (PH.D.)</subfield>
    <subfield code="u">ADDIS ABABA SCIENCE AND TECHNOLOGY UNIVERSITY</subfield>
    <subfield code="4">ths</subfield>
  </datafield>
  <datafield tag="520" ind1=" " ind2=" ">
    <subfield code="a">&lt;p&gt;Concrete is the most common building material that is used prominently in construction industry. It&lt;br&gt;
can be cast in any desired shape and fashion and should be workable whether on- site or in ready mix&lt;br&gt;
concrete production. To achieve better performance and desired proprieties of concrete, the use of&lt;br&gt;
chemical admixtures is priceless choice in concrete production. While, there are common problems&lt;br&gt;
facing to optimize superplasticzer dosage with various types of cement to produce desirable&lt;br&gt;
properties of fresh and hardened concrete due to lack of practices in construction industry in our&lt;br&gt;
country.&lt;br&gt;
The purpose of this research was determining optimum Superplasticizer dosage for desired&lt;br&gt;
workability using Marsh Cone Test at pre-determined water cement ratio. It was also analysis the&lt;br&gt;
effect and influences of Superplasticizer dosage on concrete properties. Slump Cone test and testing&lt;br&gt;
machine were used to determine such properties of concrete. The first conclusion that was drawn&lt;br&gt;
from the research was deciding optimum dosage on cement slurry which was prepared using different&lt;br&gt;
types of Super plasticizer and Cements for variable water cement ratio. Secondly, the test were&lt;br&gt;
carried out to see effects of Superplasticizer dosage on improvement of workability and flowablity of&lt;br&gt;
fresh concrete in specified doses. Also, it was also noticed changes of hardened concrete properties&lt;br&gt;
using mechanical tests.&lt;br&gt;
Using 0.45 and 0.40 water-cement ratio, optimum dosage of Superplasticizer (ODS) has found out,&lt;br&gt;
with respect to different Superplasticzers on different brand of cement paste mix.&lt;br&gt;
Secondly, it also observed the effect of superplasticzer dosage for pre- determined quantity (0.5%,&lt;br&gt;
1.0%, 1.5% and 2.0%) on hardened concrete strength in addition to fresh concrete characteristics.&lt;br&gt;
Thirdly, the demand of water reduced by 20%, 23%, 27% and 30% from total mix water using&lt;br&gt;
0.5%,1.0%,1.5% and 2.0% of Superplasticizer respectively in concrete mix.&lt;br&gt;
Generally, Superplasticzer is playing vitally role to achieve better physical properties and quality of&lt;br&gt;
concrete, and resolving challenges in undesirable conditions during concrete work operations. Despite&lt;br&gt;
these facts, over dosage of SP were found to deteriorate the properties of concrete with indication of&lt;br&gt;
lower compressive strength and higher porosity due to bleeding and segregation occurrences.&lt;/p&gt;</subfield>
  </datafield>
</record>
26
8
views
downloads
All versions This version
Views 2626
Downloads 88
Data volume 31.4 MB31.4 MB
Unique views 1414
Unique downloads 77

Share

Cite as