Investigation into lowering cement clinker content using available materials

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Investigation into lowering cement clinker content using available materials

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/14832

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dc.contributor.advisor Kevern, John T. en
dc.contributor.author Cao, Qiwei
dc.date.accessioned 2012-08-17T19:56:37Z
dc.date.available 2012-08-17T19:56:37Z
dc.date.issued 2012-08-17
dc.date.submitted 2012 Summer en
dc.identifier.uri http://hdl.handle.net/10355/14832
dc.description Title from PDF of title page, viewed on August 17, 2012 en
dc.description Thesis advisor: John T. Kevern en
dc.description Vita en
dc.description Includes bibliographic references (p. 64-66) en
dc.description Thesis (M.S.)--School of Computing and Engineering. University of Missouri--Kansas City, 2012 en
dc.description.abstract Reducing cement clinker with mineral addition has been considered an efficient way of saving energy, lowering CO2 footprint of cement and concrete industries. The trend of using limestone as mineral addition in cement production started in 1992s. Cement containing limestone additions up 35% have been used in European countries adopting the European Standard EN 197. Similar standards have been developed, such as Canadian Standard, CSA A3000, which has approved the limestone addition from 5% up to 15% by mass. In U.S., ASTM standard C595 for Portland blended cement needs to be changed to have a significant impact on sustainability. This research tested concrete fresh properties, strength development and durability properties made using different types of blended cement, a series of limestone addition rates, which changed from 5% to 18% by mass, and a series of ternary mixtures with limestone and fly ash combination at 20% replacement rate. Concrete mixtures using a type I/II cement was used as a baseline for comparison. Results showed that limestone addition decreased concrete workability while fly ash addition in ternary mixtures improved workability. Concrete made using cement with limestone addition showed improved early age strength. Fly ash addition in ternary mixtures showed lower early age strengths. Mortars with limestone addition to 18% and ternary mixtures showed no statistically significant difference on volume stability comparing to the control group which were prepared using ordinary Portland cement. Blended cement with limestone addition has less length changes when exposed to sulfates. Limestone additions up to 18% by mass showed improvement for sulfate resistance. The ternary mixtures also showed sulfate resistance improvement. Concrete permeability increased with increasing limestone addition. Fly ash showed significant decrease in permeability. Concrete freezethaw resistance is strongly related with air content. Limestone addition rates up to 18% had freeze-thaw resistance decreased. Results showed that the properties of blended cement such as particle size distribution, the quality and quantity of mineral addition can affect concrete fresh properties, harden properties and durability. Blend cement with limestone addition rate up to 18% have no significant negative effect on concrete performance. en_US
dc.description.tableofcontents Introduction -- Literature review -- Materials and mixture designs -- Test methods -- Results and discussion -- Conclusion en
dc.format.extent xii, 67 pages en
dc.language.iso en_US en_US
dc.publisher University of Missouri--Kansas City en
dc.subject.lcsh Cement clinkers en
dc.subject.lcsh Cement -- Additives en
dc.subject.other Thesis -- University of Missouri--Kansas City -- Engineering en
dc.title Investigation into lowering cement clinker content using available materials en_US
dc.type Thesis en_US
thesis.degree.discipline Civil Engineering en
thesis.degree.grantor University of Missouri--Kansas City en
thesis.degree.name M.S. en
thesis.degree.level Masters en


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