Title

Synthesis of Modified Portland Cement Particles

Presenter Information

Gladwin Bryan Labrague

Department

Chemistry

Major

Chemistry

Research Advisor

Schuman, Thomas P.

Advisor's Department

Chemistry

Abstract

Portland cement is dehydrated limestone mixed with gypsum (calcium sulfate), which inhibits hydration from instantaneous reaction to approximately five hours. This becomes a problem when the cement 'sets' right in the truck and ruins the truck's mixing drum. At the same time, if cement were to be poured or applied, it takes another roughly another five hours for it to set. Hydration was controlled through surface modification of Portland cement using various combinations of certain compounds. Results show that one layer of compound B dissolved in solvent 2 and thirty-two layers of compound A dissolved in solvent 2 completely retarded the hydration of Portland cement for more than twenty-four hours. Furthermore, using eight and thirty-two layers of compound C dissolved in solvent 6, using four, eight, and thirty-two layers of compound C dissolved in solvent 2, and using thirty-layers of compound A dissolved in solvent 1 can delay hydration reaction for up to at least eight hours.

Biography

Gladwin Bryan Labrague is a current junior majoring in Chemistry with emphasis in Polymers and Coatings Science. He currently works as a tutor at the Student Success Center and as a PRO (Preview, Registration, and Orientation) Leader at the New Student Programs of Missouri S&T. Aside from chemistry, Gladwin also likes creative arts. He is currently the president and editor of Southwinds Creative Arts Magazine of the Department of English and Technical Communication at Missouri S&T. On his leisure time, he likes to play tennis and learn about fashion.

Presentation Type

OURE Fellows Final Oral Presentation

Document Type

Presentation

Presentation Date

29 Apr 2017, 1:15 pm - 1:30 pm

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Apr 29th, 1:15 PM Apr 29th, 1:30 PM

Synthesis of Modified Portland Cement Particles

Portland cement is dehydrated limestone mixed with gypsum (calcium sulfate), which inhibits hydration from instantaneous reaction to approximately five hours. This becomes a problem when the cement 'sets' right in the truck and ruins the truck's mixing drum. At the same time, if cement were to be poured or applied, it takes another roughly another five hours for it to set. Hydration was controlled through surface modification of Portland cement using various combinations of certain compounds. Results show that one layer of compound B dissolved in solvent 2 and thirty-two layers of compound A dissolved in solvent 2 completely retarded the hydration of Portland cement for more than twenty-four hours. Furthermore, using eight and thirty-two layers of compound C dissolved in solvent 6, using four, eight, and thirty-two layers of compound C dissolved in solvent 2, and using thirty-layers of compound A dissolved in solvent 1 can delay hydration reaction for up to at least eight hours.