Results 251 to 260 of about 408,552 (288)

A carbonation prediction model for accelerated carbonation testing of concrete

Magazine of Concrete Research, 1994
This Paper reports an experimental investigation to establish the influence of ambient CO2, concentration, exposure temperature and curing duration on the rate of carbonation in concrete. The test specimens were concrete cylinders 100 mm in diameter and 200 mm high. Of the parameters investigated, the standard 28-day compressive strength f28 was found
Loo, Y.H., Chin, M.S., Tam, C.T., Ong, K.C.G.   +3 more
openaire   +1 more source

Utilization of carbon dioxide by chemically accelerated mineral carbonation

Materials Letters, 2010
Abstract This paper describes the process of mineral carbonation, where gaseous CO 2 is fixed in the form of inorganic carbonates, and silica forms a solid by-product. The process is similar to naturally occurring rock weathering and the reaction products are environmental friendly.
Jerzy Bałdyga, Marek Henczka, Katarzyna Sokolnicka   +2 more
openaire   +1 more source

Isocapnic Hyperpnea Accelerates Carbon Monoxide Elimination

American Journal of Respiratory and Critical Care Medicine, 1999
Abstract A major impediment to the use of hyperpnea in the treatment of CO poisoning is the development of hypocapnia or discomfort of CO2 inhalation. We examined the effect of nonrebreathing isocapnic hyperpnea on the rate of decrease of carboxyhemoglobin levels (COHb) in five pentobarbital-anesthetized ventilated dogs first exposed ...
J A, Fisher, J, Rucker, L Z, Sommer, A, Vesely, E, Lavine, Y, Greenwald, G, Volgyesi, L, Fedorko, S, Iscoe   +8 more
openaire   +2 more sources

Solidification of stainless steel slag by accelerated carbonation

Environmental Technology, 2003
On exposure to carbon dioxide (CO2) at a pressure of 3 bars, compacts formed from pressed ground slag, and 12.5 weight percent water, were found to react with approximately 18% of their own weight of CO2. The reaction product formed was calcium carbonate causing the slag to self-cement.
D C, Johnson, C L, MacLeod, P J, Carey, C D, Hills   +3 more
openaire   +2 more sources

Accelerated carbonation for treatment of MSWI bottom ash

Journal of Hazardous Materials, 2006
Leaching of heavy metals from MSWI bottom ash exceeds some of the Flemish limit values for recycling the material as granular construction application. In particular, leaching of Cu, Zn and Pb often exceeds the limit value, with Cu being the most critical. In order to recycle bottom ash, treatment is therefore required.
S, Arickx, T, Van Gerven, C, Vandecasteele   +2 more
openaire   +2 more sources

Biotechnology for the acceleration of carbon dioxide capture and sequestration

Current Opinion in Biotechnology, 2011
The potential for enzymatic acceleration of carbon dioxide capture from combustion products of fossil fuels has been demonstrated. Carbonic anhydrase (CA) accelerates post combustion CO(2) capture, but available CAs are woefully inadequate for the harsh conditions employed in most of these processes.
Christopher K, Savile, James J, Lalonde
openaire   +2 more sources

Carbon-Nanotube-Induced Acceleration of Catalytic Nanomotors

ACS Nano, 2008
Synthetic nanoscale motors represent a major step toward the development of practical nanomachines. Despite impressive progress, man-made nanomachines lack the efficiency and speed of their biological counterparts. Here we show that the incorporation of carbon nanotubes (CNT) into the platinum (Pt) component of asymmetric metal nanowire motors leads to
Rawiwan, Laocharoensuk, Jared, Burdick, Joseph, Wang   +2 more
openaire   +2 more sources

Acceleration of Plasma Bicarbonate Conversion to Carbon Dioxide by Pulmonary Carbonic Anhydrase

Science, 1978
In isolated rabbit lungs perfused with solutions containing little or no carbonic anhydrase activity, nearly complete equilibration between H 14 CO 3 - and 14 CO 2 occurs during a single circulation.
R M, Effros, R S, Chang, P, Silverman
openaire   +2 more sources

Accelerated carbonation of reactive MgO cements

Advances in Cement Research, 2007
Experiments were carried out to determine the conditions for the accelerated carbonation of reactive MgO cements, which are blends of MgO, Portland cement (PC) and pulverised fuel ash (pfa). The samples were exposed to two levels of CO2 (5 and 20%) in their curing environment at two levels of relative humidity (RH), namely 65 and 98%, RH, and the ...
L. J. Vandeperre, A. Al-Tabbaa
openaire   +1 more source

Accelerating the synthesis of carbon aerogel precursors

Journal of Non-Crystalline Solids, 2004
Abstract We have systematically modified the synthesis process for resorcinol and formaldehyde (RF) aerogels in order to reduce the time necessary for production of carbon aerogels. Firstly, the synthesis step that starts with mixing a solution of resorcinol and formaldehyde at relatively high resorcinol-to-catalyst, R/C, ratios (1000–3000) was ...
M. Wiener, G. Reichenauer, T. Scherb, J. Fricke   +3 more
openaire   +1 more source