Results 41 to 50 of about 2,552 (162)

Investigation of the parameters influencing progress of concrete carbonation depth by using artificial neural networks

open access: yesMateriales de Construccion, 2020
Carbonation is a deleterious concrete durability problem which may alter concrete microstructure and yield initiation of corrosion in reinforcing steel bars.
P. Akpinar, I. D. Uwanuakwa
doaj   +1 more source

Pedogenic Carbonates and Radiocarbon Isotopes of Organic Carbon at Depth in the Russian Chernozem [PDF]

open access: yesGeosciences, 2018
Conversion of native grasslands to agricultural sites has resulted in remarkable changes in soil carbon at depth, but its impact on soil diagnostic horizons is unknown. This study was conducted to radiocarbon date the soil organic carbon (SOC) and quantify pedogenic carbonates in the Russian Chernozem at depth at three sites: a native grassland field ...
Elena A. Mikhailova   +8 more
openaire   +3 more sources

Liquid Carbon Dioxide in the Depths of the Ocean [PDF]

open access: yesNature, 1932
A PARAGRAPH in NATURE of April 23, p. 607, refers to a paper in which the Russian geologist W. Vernadsky states that carbon dioxide is in a stable liquid state in the depths of the ocean. He assumes that this may be the reason why there are no appreciable amounts of plankton below about two hundred metres. It must be remarked that the carbon dioxide is
openaire   +1 more source

Influence of shotcrete carbonation resistance under bending stress

open access: yes工程科学与技术, 2015
:The durability experiments of shotcrete with and without steel fiber under bending stress in accelerated carbonation corrosive environments were carried out to investigate the carbonation regularity of tunnel lining.
Wang Jiabin
doaj  

Cost-effective design of reinforced concrete with use of self-terminated carbonation model

open access: yesMATEC Web of Conferences, 2016
According to Eurocodes EC0 and EC2 designing of concrete structure durable in terms of carbonation is assured by selection of suitable thickness of reinforcement concrete cover.
Woyciechowski Piotr, Sokołowska Joanna
doaj   +1 more source

Carbonation Process of Reinforced Concrete Beams under the Combined Effects of Fatigue Damage and Environmental Factors

open access: yesApplied Sciences, 2020
The carbonation process of reinforced concrete (RC) beams considering the combined effect of fatigue load and environmental factors was investigated experimentally in an environmental simulation chamber based on meteorological environmental data ...
Li Song   +5 more
doaj   +1 more source

Optimal Mixture Design of Low-CO2 High-Volume Slag Concrete Considering Climate Change and CO2 Uptake

open access: yesInternational Journal of Concrete Structures and Materials, 2019
High-volume slag (HVS) can reduce the CO2 emissions of concrete, but increase the carbonation depth of concrete. In particular, because of the effects of climate change, carbonation will accelerate.
Han-Seung Lee   +2 more
doaj   +1 more source

Novel accelerated carbonation methods based on deep breathing analogous and prediction model for pressurized carbonation of concrete

open access: yesScientific Reports
This research proposes a novel deep breathing analogy (DBA) accelerated carbonation process. Inspired by the breathing mechanism of human lungs, the DBA method involves injecting pure CO2 into a reaction chamber at a specific pressure (inspiration) and ...
Ray Kai Leung Su   +3 more
doaj   +1 more source

Predicting Carbonation Depth of Recycled Aggregate Concrete Using Optuna-Optimized Explainable Machine Learning

open access: yesBuildings
Accurately predicting the carbonation depth of recycled aggregate (RA) concrete is essential for durability assessment. Based on a dataset of 682 experimental samples, this study employed seven machine learning algorithms to develop prediction models for
Yuxin Chen   +3 more
doaj   +1 more source

Plumbing the Depths of the Marine Carbon Cycle

open access: yesEos, 2017
Scientists measure dissolved black carbon in South China Sea water samples to better understand the carbon cycle in the oceans, which absorb roughly half of all carbon emitted into the atmosphere.
openaire   +1 more source

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