東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

FindBook

Google Book

Amazon

博客來

Synthesis and Characterization of Carbon Sequestering Calcium Carbonate Cement.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Synthesis and Characterization of Carbon Sequestering Calcium Carbonate Cement./
作者:	Uddin, Mohammad Jobaer.
面頁冊數:	1 online resource (85 pages)
附註:	Source: Masters Abstracts International, Volume: 84-05.
Contained By:	Masters Abstracts International84-05.
標題:	Mechanical properties. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29756005click for full text (PQDT)
ISBN:	9798352978856

Synthesis and Characterization of Carbon Sequestering Calcium Carbonate Cement.
Uddin, Mohammad Jobaer.

Synthesis and Characterization of Carbon Sequestering Calcium Carbonate Cement. - 1 online resource (85 pages)

Source: Masters Abstracts International, Volume: 84-05.

Thesis (M.Sc.)--University of North Florida, 2020.

Includes bibliographical references

The cement industry is the second-largest manufacturing emitter of CO2, and the manufacture and placement of concrete accounts for 7-8% of anthropogenic CO2 emissions. There is increasing pressure on the cement industry to develop a sustainable cement to support rapid global urban development without the associated emissions of cement production. The calcination reaction required to manufacture Portland cement is the prime source of emissions, so eliminating the release of CO2 liberated during calcination of limestone provides an excellent opportunity to produce a more sustainable cement. Calcium carbonate (CaCO3) cement is a novel alternative, which can eliminate the calcination process or close the loop on CO2 emissions during cement production. In this study, a vateritic CaCO3 is synthesized from the double decomposition reaction of equimolar CaCl2.2H2O and Na2CO3 at room temperature using a continuous stirred-tank reactor (CSTR). The morphology of precipitated vaterite displays nano-aggregated micron-sized spherical particles. The dissolution of vaterite and recrystallization to a stable polymorph (calcite and/or aragonite) provides the necessary cementing reaction. Mg2+ and/or Sr2+ ions control the transformation kinetics and the abundance of the stable phase. However, the low concentration of Mg2+ (0.05 M) was insufficient to inhibit calcite formation and promote aragonite formation. Aragonite containing hardened cement exhibits 10 times higher compressive strength than a calcite containing one. The hardened cement exhibits a pH neutral microporous structure with relatively low compressive strength; the highest compressive strength was measured at approximately 1.11 MPa. By capitalizing on the unique properties of CaCO3 cement, it can be developed as an ideal cement to support environmental restoration projects, such as oyster reef restoration along the Intracoastal Waterway in Florida, where the neutral pH of CaCO3 cement and its chemical composition provide it with enhanced properties for oyster recruitment compared to Portland cement.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798352978856Subjects--Topical Terms:

3549505
Mechanical properties.
Index Terms--Genre/Form:

542853
Electronic books.

Synthesis and Characterization of Carbon Sequestering Calcium Carbonate Cement.
LDR:03511nmm a2200469K 4500 001 2359948
005 20230925131717.5
006 m o d
007 cr mn ---uuuuu
008 241011s2020 xx obm 000 0 eng d
020 $a 9798352978856
035 $a (MiAaPQ)AAI29756005
035 $a (MiAaPQ)NFL2048
035 $a AAI29756005
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Uddin, Mohammad Jobaer. $3 3700566
245 1 0 $a Synthesis and Characterization of Carbon Sequestering Calcium Carbonate Cement.
264 0 $c 2020
300 $a 1 online resource (85 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 84-05.
500 $a Advisor: Eason, Paul D.
502 $a Thesis (M.Sc.)--University of North Florida, 2020.
504 $a Includes bibliographical references
520 $a The cement industry is the second-largest manufacturing emitter of CO2, and the manufacture and placement of concrete accounts for 7-8% of anthropogenic CO2 emissions. There is increasing pressure on the cement industry to develop a sustainable cement to support rapid global urban development without the associated emissions of cement production. The calcination reaction required to manufacture Portland cement is the prime source of emissions, so eliminating the release of CO2 liberated during calcination of limestone provides an excellent opportunity to produce a more sustainable cement. Calcium carbonate (CaCO3) cement is a novel alternative, which can eliminate the calcination process or close the loop on CO2 emissions during cement production. In this study, a vateritic CaCO3 is synthesized from the double decomposition reaction of equimolar CaCl2.2H2O and Na2CO3 at room temperature using a continuous stirred-tank reactor (CSTR). The morphology of precipitated vaterite displays nano-aggregated micron-sized spherical particles. The dissolution of vaterite and recrystallization to a stable polymorph (calcite and/or aragonite) provides the necessary cementing reaction. Mg2+ and/or Sr2+ ions control the transformation kinetics and the abundance of the stable phase. However, the low concentration of Mg2+ (0.05 M) was insufficient to inhibit calcite formation and promote aragonite formation. Aragonite containing hardened cement exhibits 10 times higher compressive strength than a calcite containing one. The hardened cement exhibits a pH neutral microporous structure with relatively low compressive strength; the highest compressive strength was measured at approximately 1.11 MPa. By capitalizing on the unique properties of CaCO3 cement, it can be developed as an ideal cement to support environmental restoration projects, such as oyster reef restoration along the Intracoastal Waterway in Florida, where the neutral pH of CaCO3 cement and its chemical composition provide it with enhanced properties for oyster recruitment compared to Portland cement.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Mechanical properties. $3 3549505
650 4 $a Nanoparticles. $3 605747
650 4 $a Oysters. $3 3424269
650 4 $a Decomposition. $3 3561186
650 4 $a Chemistry. $3 516420
650 4 $a Scanning electron microscopy. $3 551366
650 4 $a Geology. $3 516570
650 4 $a Crystal structure. $3 3561040
650 4 $a Concrete mixing. $3 3681395
650 4 $a Carbon sequestration. $3 601998
650 4 $a Fourier transforms. $3 3545926
650 4 $a Civil engineering. $3 860360
650 4 $a Carbon dioxide. $3 587886
650 4 $a Quantitative analysis. $3 3452583
650 4 $a Particle size. $3 3564817
650 4 $a Curing. $3 3681399
650 4 $a Morphology. $3 591167
650 4 $a Analytical chemistry. $3 3168300
650 4 $a Animal sciences. $3 3174829
650 4 $a Biology. $3 522710
650 4 $a Environmental engineering. $3 548583
650 4 $a Industrial engineering. $3 526216
650 4 $a Mathematics. $3 515831
650 4 $a Mechanics. $3 525881
650 4 $a Nanotechnology. $3 526235
650 4 $a Physics. $3 516296
655 7 $a Electronic books. $2 lcsh $3 542853
690 $a 0372
690 $a 0543
690 $a 0287
690 $a 0485
690 $a 0486
690 $a 0475
690 $a 0306
690 $a 0775
690 $a 0546
690 $a 0405
690 $a 0346
690 $a 0652
690 $a 0605
710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a University of North Florida. $3 1022591
773 0 $t Masters Abstracts International $g 84-05.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29756005 $z click for full text (PQDT)