Results 51 to 60 of about 15,071 (234)

Supported ITZ modification efficiencies via surface coating nanoparticles on aggregate and its influence on properties [PDF]

, 2019
In order to modify the porous interfacial transition zone (ITZ) microstructure of concrete more efficiently, a method of coating aggregate surfaces by using several nanoparticles was evaluated in this study. The compressive strength, chloride penetration
De Schutter, Geert, Han, Hao, Wu, Kai, Xu, Linglin, Yang, Xiaojie   +4 more
core   +1 more source

Ettringite dependace in thaumasite formation

IOP Conference Series: Materials Science and Engineering, 2020
Abstract Thaumasite has been synthetized with and without ettringite in the reaction medium. The compositions of solids have been analyzed over time by means of X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM-EDX) in order to check the relation between ettringite and thaumasite. The results indicate that in the synthesis in
Chinchón Payá, Servando, Aguado de Cea, Antonio, Chinchón Yepes, Servando   +2 more
openaire   +2 more sources

Carbon Dots: An Emerging Frontier for Green and Sustainable Civil Engineering Materials

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Traditional civil engineering materials (CE materials) are usually involved with high‐energy consumption during manufacturing, significant maintenance costs, and substantial environmental impacts throughout their life cycles. The progress of nanotechnology is catalyzing a green and sustainable transformation within the field.
Weiwen Hao, Xiaolong Wang, Xiao Chen, Dong Liu, Zhenhui Kang, Cheng Zhu   +5 more
wiley   +1 more source

Optimizing feather hydrolysate via machine learning for microbial recycling of waste concrete fines

Journal of Chemical Technology &Biotechnology, EarlyView.
Abstract BACKGROUND The concrete industry faces significant challenges from CO2 emissions and the disposal of waste concrete fines (WCF). Microbially induced calcite precipitation (MICP) can bind WCF into bioconcrete, but the high cost of commercial culture media hinders its application.
Henrietta Ottová, Barbora Malíková, Václav Nežerka, Petr Holeček, Dana Koňáková, Hana Stiborová   +5 more
wiley   +1 more source

Effect of hybrid accelerator on the property of CFBFA-based foamed concrete

Shenzhen Daxue xuebao. Ligong ban
Circulating fluidized bed fly ash (CFBFA) is a major by-product of modern coal combustion technologies. Foamed concrete with a high CFBFA content can meet insulation requirements for building partition walls.
DONG Biqin, ZHANG Xiao, LIU Yuantao, WANG Yanshuai   +3 more
doaj   +1 more source

Study of cement-fly ash paste exposed to sodium sulfate solutions with different concentrations at different temperatures [PDF]

, 2010
When concrete elements are partially exposed to sulfate environment, in the upper part of concrete elements above ground an aquiferous zone containing almost saturated and high pH value (> 12.5) sulfate pore solution will be formed.
De Schutter, Geert, Deng, Dehua, Liu, Yunhua, Liu, Zanqun   +3 more
core  

Influence of natural fibers on physical, mechanical, and fire‐resistant properties of microconcrete

Structural Concrete, EarlyView.
Abstract This study examined the influence of natural fibers on the physical, mechanical, and fire‐resistant properties of microconcrete, in comparison with conventional polypropylene fibers used in cement composites. The fibers were characterized by FTIR and TGA/DSC to assess their composition and thermal stability, and FTIR was also performed after ...
Ivanka Netinger Grubeša, Sandra Juradin, Silvija Mrakovčić, Lidija Radovanović, Milica Vasić, Huseyin Bilgin   +5 more
wiley   +1 more source

Mortar and concrete based on calcium sulphate binders [PDF]

, 2006
In this study both hemi-hydrate and anhydrite are tested as calcium sulphate binders for structural mortar and concrete. The advantage of using calcium sulphates instead of cement as a binder is the fact that the production of calcium sulphate is more ...
Bakker, J.J.F., Brouwers, H.J.H.
core   +1 more source

Accelerated and natural carbonation of concrete with high volumes of fly ash : chemical, mineralogical and microstructural effects [PDF]

, 2019
Today, a rather poor carbonation resistance is being reported for high-volume fly ash (HVFA) binder systems. This conclusion is usually drawn from accelerated carbonation experiments conducted at CO2 levels that highly exceed the natural atmospheric CO2 ...
De Belie, Nele, De Schepper, Mieke, Van den Heede, Philip   +2 more
core   +1 more source

Immobilizing Pertechnetate in Ettringite via Sulfate Substitution

Environmental Science & Technology, 2020
Technetium-99 immobilization in low-temperature nuclear waste forms often relies on additives that reduce environmentally mobile pertechnetate (TcO4-) to insoluble Tc(IV) species. However, this is a short-lived solution unless reducing conditions are maintained over the hazardous life cycle of radioactive wastes (some ∼10,000 years). Considering recent
Sarah A. Saslow, Sebastien N. Kerisit, Tamas Varga, Sebastian T. Mergelsberg, Claire L. Corkhill, Michelle M. V. Snyder, Nancy M. Avalos, Antonia S. Yorkshire, Daniel J. Bailey, Jarrod Crum, R. Matthew Asmussen   +10 more
openaire   +4 more sources