Results 31 to 40 of about 49,103 (280)

Red ceramic and concrete waste as replacement of portland cement: Microstructure aspect of eco-mortar in external sulfate attack

Cleaner Materials, 2022
The use of red ceramic and concrete waste as a replacement for cement has great importance from an environmental point of view, and it is necessary to understand its influence on the cement matrix's performance.
Fernanda Brekailo, Eduardo Pereira, Elias Pereira, Marcelo M. Farias, Ronaldo A. Medeiros-Junior   +4 more
doaj   +1 more source

RISK ASSESSMENT OF A POTENTIAL EXTERNAL AND INTERNAL SULFATE ATTACK IN POZZOLANIC CEMENTITIOUS MATRICES

Mix Sustentável
This work evaluated the behavior of cementitious composites against internal and external attack by sulfates (ISA and ESA, respectively) over time, as well as the mitigating potential of Brazilian cements considered pozzolanic.
Luriane Zago Perondi, Nicole Pagan Hasparyk , Francieli Tiecher Bonsembiante   +2 more
doaj   +1 more source

A multi-phase numerical simulation method for the changing process of expansion products on concrete under sulfate attack

Case Studies in Construction Materials, 2023
Concrete constructions used in harsh marine environments are commonly destroyed by sulfate ions. In this paper, by modeling aggregates as random convex polygons, to analyze and forecast the deteriorating condition of concrete under salt attack, a finite ...
Tian Wu, Libing Jin, Tai Fan, Linran Qiao, Peng Liu, Pin Zhou, Yesheng Zhang   +6 more
doaj   +1 more source

Cloud condensation nuclei activity, closure, and droplet growth kinetics of Houston aerosol during the Gulf of Mexico Atmospheric Composition and Climate Study (GoMACCS) [PDF]

, 2009
In situ cloud condensation nuclei (CCN) measurements were obtained in the boundary layer over Houston, Texas, during the 2006 Gulf of Mexico Atmospheric Composition and Climate Study (GoMACCS) campaign onboard the CIRPAS Twin Otter.
Dubey, Manvendra K., Feingold, Graham, Flagan, Richard C., Gates, Harmony, Jonsson, Haflidi H., Lance, Sara, Mazzoleni, Claudio, Murphy, Shane M., Nenes, Athanasios, Rissman, Tracey A., Seinfeld, John H., Sorooshian, Armin, Varutbangkul, Varuntida   +12 more
core   +2 more sources

A Case Study of Thaumasite Sulfate Attack in Tunnel Engineering

Advances in Civil Engineering, 2021
There existed ever-increasing structural diseases in the Dugongling tunnel after the completion of the construction. Systematic research was carried out based on the information of tunnel engineering geology, disease development, mineral composition of ...
Chongbang Xu, Xingyu Zhou, Hualao Wang, Xiaojing Gao, Xuefeng Li   +4 more
doaj   +1 more source

Concrete admixtures - sustainable concrete

Acta Polytechnica CTU Proceedings, 2022
Durability of concrete, an important part of the sustainability theme, was, is, and will be one of the main topics for large infrastructure projects like the Gotthard base tunnel.
Oliver Schwoon
doaj   +1 more source

Evaluation of external sulfate attack (Na2SO4 and MgSO4): Portland cement mortars containing siliceous supplementary cementitious materials

Revista IBRACON de Estruturas e Materiais, 2020
: Sulfate attack is a term used to describe a series of chemical reactions between sulfate ions and hydrated compounds of the hardened cement paste. The present study aims to evaluate the physical (linear expansion, flexural and compressive strength) and
Diego Jesus de Souza, Marcelo Henrique Farias de Medeiros, Juarez Hoppe Filho   +2 more
doaj   +1 more source

Hybrid geopolymer-cement coating mortar optimized based on metakaolin, fly ash, and granulated blast furnace slag

Cleaner Engineering and Technology, 2021
The use of wastes for new binders aims to reduce the environmental impact caused by the manufacture of Portland cement (PC) given the advance of urbanization.
Manuela Bazzani Kretzer, Carmeane Effting, Samoel Schwaab, Adilson Schackow   +3 more
doaj   +1 more source

Isolation and characterization of Alicycliphilus denitrificans strain BC, which grows on benzene with chlorate as the electron acceptor [PDF]

, 2008
A bacterium, strain BC, was isolated from a benzene-degrading chlorate-reducing enrichment culture. Strain BC degrades benzene in conjunction with chlorate reduction.
Broeke, H., ten, Doesburg, W.C.J., van, Gerritse, J., Junca, H., Kieboom, C., van den, Langenhoff, A.A.M., Stams, A.J.M., Tan, N.C.G., Weelink, S.A.B.   +8 more
core   +2 more sources

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source