國立虎尾科技大學 |

Electrical Imaging and Numerical Simulation of Unsaturated Moisture Flow in Cement-Based Materials.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Electrical Imaging and Numerical Simulation of Unsaturated Moisture Flow in Cement-Based Materials./
Author:	Smyl, Danny James.
Description:	1 online resource (145 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 79-04(E), Section: B.
Contained By:	Dissertation Abstracts International79-04B(E).
Subject:	Civil engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9780355458893

Electrical Imaging and Numerical Simulation of Unsaturated Moisture Flow in Cement-Based Materials.
Smyl, Danny James.

Electrical Imaging and Numerical Simulation of Unsaturated Moisture Flow in Cement-Based Materials. - 1 online resource (145 pages)

Source: Dissertation Abstracts International, Volume: 79-04(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

Deterioration of concrete structures generally occurs in the presence of moisture. Moisture is essential for the majority if the deterioration processes and also facilitates transport of aggressive agents that contribute to corrosion of reinforcing steel or degradation and transformation of hydration products. Due to environmental exposure, temperature and the degree of moisture saturation fluctuate throughout the service life of a structure.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355458893Subjects--Topical Terms:

561339
Civil engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Electrical Imaging and Numerical Simulation of Unsaturated Moisture Flow in Cement-Based Materials.
LDR:03533ntm a2200385Ki 4500 001 911324
005 20180529081903.5
006 m o u
007 cr mn||||a|a||
008 190606s2017 xx obm 000 0 eng d
020 $a 9780355458893
035 $a (MiAaPQ)AAI10708404
035 $a AAI10708404
040 $a MiAaPQ $b eng $c MiAaPQ
099 $a TUL $f hyy $c available through World Wide Web
100 1 $a Smyl, Danny James. $3 1183049
245 1 0 $a Electrical Imaging and Numerical Simulation of Unsaturated Moisture Flow in Cement-Based Materials.
264 0 $c 2017
300 $a 1 online resource (145 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: Dissertation Abstracts International, Volume: 79-04(E), Section: B.
500 $a Advisers: Mohammad Pour-Ghaz; Gregory Lucier.
502 $a Thesis (Ph.D.) $c North Carolina State University $d 2017.
504 $a Includes bibliographical references
520 $a Deterioration of concrete structures generally occurs in the presence of moisture. Moisture is essential for the majority if the deterioration processes and also facilitates transport of aggressive agents that contribute to corrosion of reinforcing steel or degradation and transformation of hydration products. Due to environmental exposure, temperature and the degree of moisture saturation fluctuate throughout the service life of a structure.
520 $a The kinetics of moisture ow considering the coupling of variable saturation and distributed damage (cracking) are complex. This complexity has led to significant challenges in understanding moisture transport in unsaturated cement-based materials. It is therefore no surprise that material models, simulation methods, and visualization techniques are underdeveloped for damaged, unsaturated cement-based materials. Yet, such knowledge and modeling techniques are essential in service-life predictions and assessment of built structures.
520 $a This thesis aims to deepen fundamental understanding of unsaturated moisture flow in cement-based materials. In the first contribution, electrically-based methods are developed to visualize highly-transient moisture ow in damaged and undamaged material. The electrically-based methods are shown to substantially improve upon the small-size limitations of standard visualization techniques (X-ray, gamma-ray, and neutron imaging). Moreover, the visualizations are shown to have adequate resolution to accurately depict variable saturation.
520 $a The second contribution of the thesis is the development of material models and numerical simulation techniques for moisture ow in cement-based materials with distributed damage. In this effort, two simulation methods are used: one that considers moisture ow by homogenizing transport properties of the unsaturated/damaged material under hysteresis and another that considers transient unsaturated ow between fracture and undamaged material phases (dual-permeability). The results show that both methods model unsaturated ow in damaged cement-based material well, however dual-permeability model better simulated ow at late stages of ingress.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Civil engineering. $3 561339
650 4 $a Applied mathematics. $3 1069907
650 4 $a Physics. $3 564049
655 7 $a Electronic books. $2 local $3 554714
690 $a 0543
690 $a 0364
690 $a 0605
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a North Carolina State University. $b Civil Engineering. $3 1180817
773 0 $t Dissertation Abstracts International $g 79-04B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10708404 $z click for full text (PQDT)