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Effect of Temperature on the Sustainability of Eco-Engineered Cementitious Composites: Curing, Extreme Conditions and Service Life- [electronic resource]
Effect of Temperature on the Sustainability of Eco-Engineered Cementitious Composites: Curing, Extreme Conditions and Service Life- [electronic resource]

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자료유형  
 학위논문
Control Number  
0016932834
International Standard Book Number  
9798379848248
Dewey Decimal Classification Number  
333.7909599
Main Entry-Personal Name  
Francioso, Vito.
Publication, Distribution, etc. (Imprint  
[S.l.] : Purdue University., 2022
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2022
Physical Description  
1 online resource(193 p.)
General Note  
Source: Dissertations Abstracts International, Volume: 85-01, Section: A.
General Note  
Advisor: Velay-Lizancos, Maria Mirian.
Dissertation Note  
Thesis (Ph.D.)--Purdue University, 2022.
Restrictions on Access Note  
This item must not be sold to any third party vendors.
Summary, Etc.  
요약With over 30 billion tons of global annual production, concrete is the most used construction material in the world. Its manufacturing is associated with a strong environmental impact due to the high natural resources' consumption, energy consumption, and a large generation of wastes and pollutants with significant global consequences. There are many different approaches to reduce the environmental impact of cementitious materials. Two examples are: (i) the use of recycled aggregate (RA) such as recycled concrete aggregate (RCA) and recycled plastics, or supplementary cementitious materials (SCMs) such as biomass ashes to reduce the use of natural aggregates and cement, respectively, and (ii) using nano-additives (for instance, nanoTiO2) to enhance material's performance and to provide the material new properties that may have a positive proactive effect during its service life (i.e., photocatalytic properties that may reduce different pollutants concentrations from the environment). These approaches have been widely studied in standard conditions. However, boundary conditions such as temperature or moisture can be critical factors that directly or indirectly affect the effect of these approaches on the sustainability of cementitious composites in all stages of their life, from curing to service conditions.It is known that curing temperature influences the effect of using recycled materials (such as RCA or SCMs) on the mechanical properties of cementitious materials. However, there were no studies concerning the influence of curing temperature on the nano-TiO2 addition effect on mechanical properties of cementitious composites. A potential change will affect composites' sustainability; if curing temperature influences the effect of nano-TiO2 on strength, the cement content needed to achieve a given performance will variate. This study concluded that curing temperature is a key factor that changes the effect of TiO2 nanoparticles on mechanical properties and pore structure of Portland cement mortars; the lower the curing temperature, the higher the positive effect of TiO2on compressive strength.Besides the use of nano-TiO2, the substitution of NA with RCA might significantly benefit the sustainability of cementitious composites. However, the use of RCA may lead to a reduction in strength. On the other hand, the addition of nano-TiO2 mixtures containing RCA might offset this reduction in strength. Nevertheless, studying their effects on the composites' performance under extreme conditions is critical to assess the actual environmental impact since durability is one of the main pillars of cementitious materials sustainability. This study concluded that even though RCA may be beneficial to increase sustainability aspects in terms of net waste generation and natural abiotic depletion, its potential negative effects on high-temperature resistance should be considered to not lead to structural problems during its lifetime, especially if used in combination with nano-TiO2. The addition of low percentages of nano-TiO2 has a negative effect on the high-temperature resistance of mortar containing 100% RCA. Differences in thermal properties between old aggregate, old cement paste, and new cement paste with nano-TiO2 may induce internal stresses at high temperatures that can produce a failure at lower strength due to the weaker interfacial transition zone (ITZ) between the stronger new cement paste (with nano-TiO2) and the old cement paste.
Subject Added Entry-Topical Term  
Energy consumption.
Subject Added Entry-Topical Term  
Natural resources.
Subject Added Entry-Topical Term  
Carbon dioxide.
Subject Added Entry-Topical Term  
Smog.
Subject Added Entry-Topical Term  
Energy.
Subject Added Entry-Topical Term  
Natural resource management.
Subject Added Entry-Topical Term  
Sustainability.
Added Entry-Corporate Name  
Purdue University.
Host Item Entry  
Dissertations Abstracts International. 85-01A.
Host Item Entry  
Dissertation Abstract International
Electronic Location and Access  
로그인을 한후 보실 수 있는 자료입니다.
Control Number  
joongbu:644008

MARC

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■020    ▼a9798379848248
■035    ▼a(MiAaPQ)AAI30506284
■035    ▼a(MiAaPQ)Purdue19601701
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a333.7909599
■1001  ▼aFrancioso,  Vito.
■24510▼aEffect  of  Temperature  on  the  Sustainability  of  Eco-Engineered  Cementitious  Composites:  Curing,  Extreme  Conditions  and  Service  Life▼h[electronic  resource]
■260    ▼a[S.l.]▼bPurdue  University.  ▼c2022
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2022
■300    ▼a1  online  resource(193  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-01,  Section:  A.
■500    ▼aAdvisor:  Velay-Lizancos,  Maria  Mirian.
■5021  ▼aThesis  (Ph.D.)--Purdue  University,  2022.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aWith  over  30  billion  tons  of  global  annual  production,  concrete  is  the  most  used  construction  material  in  the  world.  Its  manufacturing  is  associated  with  a  strong  environmental  impact  due  to  the  high  natural  resources'  consumption,  energy  consumption,  and  a  large  generation  of  wastes  and  pollutants  with  significant  global  consequences.  There  are  many  different  approaches  to  reduce  the  environmental  impact  of  cementitious  materials.  Two  examples  are:  (i)  the  use  of  recycled  aggregate  (RA)  such  as  recycled  concrete  aggregate  (RCA)  and  recycled  plastics,  or  supplementary  cementitious  materials  (SCMs)  such  as  biomass  ashes  to  reduce  the  use  of  natural  aggregates  and  cement,  respectively,  and  (ii)  using  nano-additives  (for  instance,  nanoTiO2)  to  enhance  material's  performance  and  to  provide  the  material  new  properties  that  may  have  a  positive  proactive  effect  during  its  service  life  (i.e.,  photocatalytic  properties  that  may  reduce  different  pollutants  concentrations  from  the  environment).  These  approaches  have  been  widely  studied  in  standard  conditions.  However,  boundary  conditions  such  as  temperature  or  moisture  can  be  critical  factors  that  directly  or  indirectly  affect  the  effect  of  these  approaches  on  the  sustainability  of  cementitious  composites  in  all  stages  of  their  life,  from  curing  to  service  conditions.It  is  known  that  curing  temperature  influences  the  effect  of  using  recycled  materials  (such  as  RCA  or  SCMs)  on  the  mechanical  properties  of  cementitious  materials.  However,  there  were  no  studies  concerning  the  influence  of  curing  temperature  on  the  nano-TiO2  addition  effect  on  mechanical  properties  of  cementitious  composites.  A  potential  change  will  affect  composites'  sustainability;  if  curing  temperature  influences  the  effect  of  nano-TiO2  on  strength,  the  cement  content  needed  to  achieve  a  given  performance  will  variate.  This  study  concluded  that  curing  temperature  is  a  key  factor  that  changes  the  effect  of  TiO2  nanoparticles  on  mechanical  properties  and  pore  structure  of  Portland  cement  mortars;  the  lower  the  curing  temperature,  the  higher  the  positive  effect  of  TiO2on  compressive  strength.Besides  the  use  of  nano-TiO2,  the  substitution  of  NA  with  RCA  might  significantly  benefit  the  sustainability  of  cementitious  composites.  However,  the  use  of  RCA  may  lead  to  a  reduction  in  strength.  On  the  other  hand,  the  addition  of  nano-TiO2  mixtures  containing  RCA  might  offset  this  reduction  in  strength.  Nevertheless,  studying  their  effects  on  the  composites'  performance  under  extreme  conditions  is  critical  to  assess  the  actual  environmental  impact  since  durability  is  one  of  the  main  pillars  of  cementitious  materials  sustainability.  This  study  concluded  that  even  though  RCA  may  be  beneficial  to  increase  sustainability  aspects  in  terms  of  net  waste  generation  and  natural  abiotic  depletion,  its  potential  negative  effects  on  high-temperature  resistance  should  be  considered  to  not  lead  to  structural  problems  during  its  lifetime,  especially  if  used  in  combination  with  nano-TiO2.  The  addition  of  low  percentages  of  nano-TiO2  has  a  negative  effect  on  the  high-temperature  resistance  of  mortar  containing  100%  RCA.  Differences  in  thermal  properties  between  old  aggregate,  old  cement  paste,  and  new  cement  paste  with  nano-TiO2  may  induce  internal  stresses  at  high  temperatures  that  can  produce  a  failure  at  lower  strength  due  to  the  weaker  interfacial  transition  zone  (ITZ)  between  the  stronger  new  cement  paste  (with  nano-TiO2)  and  the  old  cement  paste.
■590    ▼aSchool  code:  0183.
■650  4▼aEnergy  consumption.
■650  4▼aNatural  resources.
■650  4▼aCarbon  dioxide.
■650  4▼aSmog.
■650  4▼aEnergy.
■650  4▼aNatural  resource  management.
■650  4▼aSustainability.
■690    ▼a0791
■690    ▼a0528
■690    ▼a0640
■71020▼aPurdue  University.
■7730  ▼tDissertations  Abstracts  International▼g85-01A.
■773    ▼tDissertation  Abstract  International
■790    ▼a0183
■791    ▼aPh.D.
■792    ▼a2022
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16932834▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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