The morphology of entrained air voids in hardened cement paste generated with different anionic surfactants

H. N. Atahan; C. Carlos; S. Chae; P. J.M. Monteiro; J. Bastacky

doi:10.1016/j.cemconcomp.2008.02.003

The morphology of entrained air voids in hardened cement paste generated with different anionic surfactants

H. N. Atahan^*
, C. Carlos
, S. Chae
, P. J.M. Monteiro
, J. Bastacky

^*Bu çalışma için yazışmadan sorumlu yazar

İnşaat Mühendisliği Bölümü

University of California at Berkeley
UCSF Benioff Children's Hospital Oakland

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

84 Atıf (Scopus)

Özet

The surface structures of entrained air voids in hardened cement paste were examined by means of an environmental scanning electron microscope (ESEM). Three different pure anionic surfactants were used: sodium dodecyl sulfonate (SDS), sodium dodecyl-benzene sulfonate (SDBS), and sodium oleate (SO). It was observed that a distinct shell forms around most of the entrained air voids regardless of the surfactant used. It was also shown that some hydration products can grow into the air voids at very early ages and may fill considerable amount of the void volume. In addition to the microscopic evaluation, a modified foam index test and surface tension measurements were also conducted on the solutions with different mixtures. It was determined that since oleate molecules coming from SO were precipitated in the mix as calcium oleate, exiguous amount of air bubbles were stabilized in the paste; however, when SDS and SDBS were used, an acceptable amount of air bubbles were stabilized.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	566-575
Sayfa sayısı	10
Dergi	Cement and Concrete Composites
Hacim	30
Basın numarası	7
DOI'lar	https://doi.org/10.1016/j.cemconcomp.2008.02.003
Yayın durumu	Yayınlandı - Ağu 2008

Finansman

The authors would like to recognize the National Science Foundation (NSF Grant 10143-23750-44) for their support of this research. The first author would like to recognize the Istanbul Technical University for their financial support during his stay in UC Berkeley. The authors would also like to thank Professor John A. Clements and Professor Jon Goerke of UC San Francisco for their assistance and discussions on surfactants, and Gordon Vrololjak of the Electron Microscope Laboratory (EML) for his assistance with the ESEM.

Finansörler	Finansör numarası
National Science Foundation	10143-23750-44
Istanbul Teknik Üniversitesi

Belgeye Erişim

10.1016/j.cemconcomp.2008.02.003

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

@article{a74102914291401d9a8db0e8ba9e46f7,

title = "The morphology of entrained air voids in hardened cement paste generated with different anionic surfactants",

abstract = "The surface structures of entrained air voids in hardened cement paste were examined by means of an environmental scanning electron microscope (ESEM). Three different pure anionic surfactants were used: sodium dodecyl sulfonate (SDS), sodium dodecyl-benzene sulfonate (SDBS), and sodium oleate (SO). It was observed that a distinct shell forms around most of the entrained air voids regardless of the surfactant used. It was also shown that some hydration products can grow into the air voids at very early ages and may fill considerable amount of the void volume. In addition to the microscopic evaluation, a modified foam index test and surface tension measurements were also conducted on the solutions with different mixtures. It was determined that since oleate molecules coming from SO were precipitated in the mix as calcium oleate, exiguous amount of air bubbles were stabilized in the paste; however, when SDS and SDBS were used, an acceptable amount of air bubbles were stabilized.",

keywords = "Air shell, Anionic surfactant, Cement paste, ESEM, Entrained air, Foam index, Microstructure, Surface tension",

author = "Atahan, \{H. N.\} and C. Carlos and S. Chae and Monteiro, \{P. J.M.\} and J. Bastacky",

year = "2008",

month = aug,

doi = "10.1016/j.cemconcomp.2008.02.003",

language = "English",

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journal = "Cement and Concrete Composites",

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TY - JOUR

T1 - The morphology of entrained air voids in hardened cement paste generated with different anionic surfactants

AU - Atahan, H. N.

AU - Carlos, C.

AU - Chae, S.

AU - Monteiro, P. J.M.

AU - Bastacky, J.

PY - 2008/8

Y1 - 2008/8

N2 - The surface structures of entrained air voids in hardened cement paste were examined by means of an environmental scanning electron microscope (ESEM). Three different pure anionic surfactants were used: sodium dodecyl sulfonate (SDS), sodium dodecyl-benzene sulfonate (SDBS), and sodium oleate (SO). It was observed that a distinct shell forms around most of the entrained air voids regardless of the surfactant used. It was also shown that some hydration products can grow into the air voids at very early ages and may fill considerable amount of the void volume. In addition to the microscopic evaluation, a modified foam index test and surface tension measurements were also conducted on the solutions with different mixtures. It was determined that since oleate molecules coming from SO were precipitated in the mix as calcium oleate, exiguous amount of air bubbles were stabilized in the paste; however, when SDS and SDBS were used, an acceptable amount of air bubbles were stabilized.

AB - The surface structures of entrained air voids in hardened cement paste were examined by means of an environmental scanning electron microscope (ESEM). Three different pure anionic surfactants were used: sodium dodecyl sulfonate (SDS), sodium dodecyl-benzene sulfonate (SDBS), and sodium oleate (SO). It was observed that a distinct shell forms around most of the entrained air voids regardless of the surfactant used. It was also shown that some hydration products can grow into the air voids at very early ages and may fill considerable amount of the void volume. In addition to the microscopic evaluation, a modified foam index test and surface tension measurements were also conducted on the solutions with different mixtures. It was determined that since oleate molecules coming from SO were precipitated in the mix as calcium oleate, exiguous amount of air bubbles were stabilized in the paste; however, when SDS and SDBS were used, an acceptable amount of air bubbles were stabilized.

KW - Air shell

KW - Anionic surfactant

KW - Cement paste

KW - ESEM

KW - Entrained air

KW - Foam index

KW - Microstructure

KW - Surface tension

UR - https://www.scopus.com/pages/publications/45849101997

U2 - 10.1016/j.cemconcomp.2008.02.003

DO - 10.1016/j.cemconcomp.2008.02.003

M3 - Article

AN - SCOPUS:45849101997

SN - 0958-9465

VL - 30

SP - 566

EP - 575

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

IS - 7

ER -

The morphology of entrained air voids in hardened cement paste generated with different anionic surfactants

Özet

Finansman

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Diğer Dosyalar ve Linkler

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