Publications associées à Sulfate de sodium

High levels of ammonia do not raise fine particle pH sufficiently to yield nitrogen oxide-dominated sulfate production

High levels of ammonia (NH3) have been suggested to elevate ambient particle pH levels to near neutral acidity (pH = 7), a condition that promotes rapid SO2 oxidation by NO2 to form aerosol sulfate concentration consistent with "London fog" levels. This po ...

Nature Publishing Group2017

Fine particle pH and the partitioning of nitric acid during winter in the northeastern United States

Athanasios Nenes, Hairun Guo

Particle pH is a critical but poorly constrained quantity that affects many aerosol processes and properties, including aerosol composition, concentrations, and toxicity. We assess PM1 pH as a function of geographical location and altitude, focusing on the ...

Wiley-Blackwell2016

Degradation mechanism of slag blended mortars immersed in sodium sulfate solution

Karen Scrivener, Wei Sun, Cheng Yu

Additions of slag are usually considered to give cementitious materials which perform well in sulfate bearing environments. This paper compares the deterioration of slag cement blends to those of plain Portland cement and demonstrates that this occurs more ...

Pergamon-Elsevier Science Ltd2015

Methods to determine hydration states of minerals and cement hydrates

Karen Scrivener, Thomas Matschei, Mahsa Saeidpour

This paper describes a novel approach to the quantitative investigation of the impact of varying relative humidity (RH) and temperature on the structure and thermodynamic properties of salts and crystalline cement hydrates in different hydration states (i. ...

Pergamon-Elsevier Science Ltd2014

Application of Image Analysis Based on SEM and Chemical Mapping on PC Mortars under Sulfate Attack

Wei Sun, Cheng Yu

The degradation mechanisms of cementitious materials exposed to sulfate solutions have been controversial, despite considerable research. In this paper, two methodologies of image analysis based on scanning electron microscope and chemical mapping are used ...

Journal Wuhan Univ Technology2014

Mechanism of expansion of mortars immersed in sodium sulfate solutions

Karen Scrivener, Wei Sun, Cheng Yu

The mechanisms behind the expansion of samples immersed in solutions containing sulfate ions have been controversial. Expansion is believed to originate in the formation of ettringite, but it is not possible to find any direct correlation between these two ...

Pergamon-Elsevier Science Ltd2013

Influence of bicarbonate ions on the deterioration of mortar bars in sulfate solutions

Karen Scrivener, Barbara Lothenbach, Wolfgang Kunther

This work investigates the influence of bicarbonate ions on the deterioration of cementitious material exposed to sulfate ions. Mortars based on a CEM I and on a CEM III/B cement were investigated. Experimental investigations were compared to thermodynamic ...

Pergamon-Elsevier Science Ltd2013

On the relevance of volume increase for the length changes of mortar bars in sulfate solutions

Karen Scrivener, Barbara Lothenbach, Wolfgang Kunther

The ingress of sulfate ions into cementitious materials leads to the formation of ettringite, gypsum and other phases. The increase in solid volume through the formation of these phases is often assumed to be the only reason for expansion. In this paper we ...

Elsevier2013

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Sulfate de sodium

High levels of ammonia do not raise fine particle pH sufficiently to yield nitrogen oxide-dominated sulfate production

Fine particle pH and the partitioning of nitric acid during winter in the northeastern United States

Degradation mechanism of slag blended mortars immersed in sodium sulfate solution

Methane Production from Microalgae via Continuous Catalytic Supercritical Water Gasification: Development of Catalysts and Sulfur Removal Techniques

Methods to determine hydration states of minerals and cement hydrates

Application of Image Analysis Based on SEM and Chemical Mapping on PC Mortars under Sulfate Attack

Enzyme and Acid Deconjugation of Plasma Sulfated Metanephrines

Mechanism of expansion of mortars immersed in sodium sulfate solutions

Influence of bicarbonate ions on the deterioration of mortar bars in sulfate solutions

On the relevance of volume increase for the length changes of mortar bars in sulfate solutions

Graph Chatbot

Chattez avec Graph Search

High levels of ammonia do not raise fine particle pH sufficiently to yield nitrogen oxide-dominated sulfate production

Application of Image Analysis Based on SEM and Chemical Mapping on PC Mortars under Sulfate Attack

Degradation mechanism of slag blended mortars immersed in sodium sulfate solution

On the relevance of volume increase for the length changes of mortar bars in sulfate solutions

Methane Production from Microalgae via Continuous Catalytic Supercritical Water Gasification: Development of Catalysts and Sulfur Removal Techniques

Fine particle pH and the partitioning of nitric acid during winter in the northeastern United States

Influence of bicarbonate ions on the deterioration of mortar bars in sulfate solutions

Methods to determine hydration states of minerals and cement hydrates

Enzyme and Acid Deconjugation of Plasma Sulfated Metanephrines

Mechanism of expansion of mortars immersed in sodium sulfate solutions