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Transport properties of high-volume fly ash concrete: capillary water sorption, water sorption under vacuum and gas permeability

Philip Van den Heede (UGent) , Elke Gruyaert (UGent) and Nele De Belie (UGent)
(2010) CEMENT & CONCRETE COMPOSITES. 32(10). p.749-756
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Abstract
Studying concrete's resistance to carbonation-induced corrosion usually involves exposing the material to CO2 for quite some time. To estimate the performance of high-volume fly ash (HVFA) concrete more quickly, two key properties governing this process can be studied, namely water penetrability and gas permeability. With respect to HVFA mixtures optimized for usage in an environment exposed to carbonation with wetting and drying, we adopted the latter approach. This paper presents a full assessment of concrete mixtures with varying fly ash amounts. A 50% fly ash mixture by mass with a binder content of 400 kg/m(3) and a water-to-binder ratio of 0.4 had a lower capillary water uptake (-32.6%), water sorption under vacuum (-10.7%) and gas permeability (-78.9%) than a proper reference normally used in this environment. The fly ash applied had an excellent quality regarding loss on ignition (3.5%) and fineness (19% retained on a 45 mu m sieve).
Keywords
Transport properties, Porosity, Concrete mix design, Durability, CEMENT, POROSITY, Pozzolans

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Chicago
Van den Heede, Philip, Elke Gruyaert, and Nele De Belie. 2010. “Transport Properties of High-volume Fly Ash Concrete: Capillary Water Sorption, Water Sorption Under Vacuum and Gas Permeability.” Cement & Concrete Composites 32 (10): 749–756.
APA
Van den Heede, P., Gruyaert, E., & De Belie, N. (2010). Transport properties of high-volume fly ash concrete: capillary water sorption, water sorption under vacuum and gas permeability. CEMENT & CONCRETE COMPOSITES, 32(10), 749–756.
Vancouver
1.
Van den Heede P, Gruyaert E, De Belie N. Transport properties of high-volume fly ash concrete: capillary water sorption, water sorption under vacuum and gas permeability. CEMENT & CONCRETE COMPOSITES. 2010;32(10):749–56.
MLA
Van den Heede, Philip, Elke Gruyaert, and Nele De Belie. “Transport Properties of High-volume Fly Ash Concrete: Capillary Water Sorption, Water Sorption Under Vacuum and Gas Permeability.” CEMENT & CONCRETE COMPOSITES 32.10 (2010): 749–756. Print.
@article{1261794,
  abstract     = {Studying concrete's resistance to carbonation-induced corrosion usually involves exposing the material to CO2 for quite some time. To estimate the performance of high-volume fly ash (HVFA) concrete more quickly, two key properties governing this process can be studied, namely water penetrability and gas permeability. With respect to HVFA mixtures optimized for usage in an environment exposed to carbonation with wetting and drying, we adopted the latter approach. This paper presents a full assessment of concrete mixtures with varying fly ash amounts. A 50\% fly ash mixture by mass with a binder content of 400 kg/m(3) and a water-to-binder ratio of 0.4 had a lower capillary water uptake (-32.6\%), water sorption under vacuum (-10.7\%) and gas permeability (-78.9\%) than a proper reference normally used in this environment. The fly ash applied had an excellent quality regarding loss on ignition (3.5\%) and fineness (19\% retained on a 45 mu m sieve).},
  author       = {Van den Heede, Philip and Gruyaert, Elke and De Belie, Nele},
  issn         = {0958-9465},
  journal      = {CEMENT \& CONCRETE COMPOSITES},
  keyword      = {Transport properties,Porosity,Concrete mix design,Durability,CEMENT,POROSITY,Pozzolans},
  language     = {eng},
  number       = {10},
  pages        = {749--756},
  title        = {Transport properties of high-volume fly ash concrete: capillary water sorption, water sorption under vacuum and gas permeability},
  url          = {http://dx.doi.org/10.1016/j.cemconcomp.2010.08.006},
  volume       = {32},
  year         = {2010},
}

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