Results 161 to 170 of about 2,271 (214)

Engineering statistical models for carbonation depth

European Journal of Environmental and Civil Engineering, 2022
Based on generalized linear models and gamma degradation processes, two models predicting the natural carbonation of reinforced concrete (R.C) structures are proposed. They include the main factors influencing the carbonation process (material, environmental and curing factors) and their effects are evaluated from a large sample of natural carbonation ...
Kouassi, Franck Antelme, Dauxois, Jean-Yves, Duprat, Frederic, de Larrard, Thomas, Deby, Fabrice   +4 more
openaire   +3 more sources

The experimental investigation of concrete carbonation depth

Cement and Concrete Research, 2006
Abstract Phenolphthalein indicator has traditionally been used to determine the depth of carbonation in concrete. This investigation uses the thermalgravimetric analysis (TGA) method, which tests the concentration distribution of Ca(OH)2 and CaCO3, while the X-ray diffraction analysis (XRDA) tests the intensity distribution of Ca(OH)2 and CaCO3.
Jing-Wen Chen
exaly   +2 more sources

Carbonate Compensation Depth: Relation to Carbonate Solubility in Ocean Waters

Science, 1974
In situ calcium carbonate saturometry measurements suggest that the intermediate water masses of the central Pacific Ocean are close to saturation with respect to both calcite and local carbonate sediment. The carbonate compensation depth, located at about 3700 meters in this area, appears to represent a depth above which waters are essentially ...
S, Ben-Yaakov, E, Ruth, I R, Kaplan
openaire   +2 more sources

Depth profiling of deuterium in a beryllium/carbon layer

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1992
Abstract Depth distributions for deuterium trapped within the Be/C layer on a JET limiter after long-term operation have been measured up to a depth of 7 μm using the D(3He, p)4He reaction in a resonance-like technique. For several points along a JET limiter tile, depth profiles and the total amount of trapped deuterium have been determined.
Hughes, I., Behrisch, R., Martinelli, A.
openaire   +2 more sources

In-depth modifications of implanted amorphous carbon films

Applied Physics A Solids and Surfaces, 1994
Amorphous carbon films (a-C:H) and nitrogen incorporated carbon films [a-C:H(N)] deposited by a self-bias glow discharge have been implanted with 70 keV nitrogen ions at fluences of 0.6, 1 and 2×1017 N/cm2. The in-depth modifications caused by ion implantation were determined by means of nuclear techniques, such as Rutherford Backscattering ...
FREIRE F.L., ACHETE C.A., FRANCESCHINI D.F., MARIOTTO, Gino   +3 more
openaire   +2 more sources

Depth profiles of carbonates formed during natural carbonation

Cement and Concrete Research, 2002
Abstract The depth profiling of carbonates formed during a natural carbonation of mortars with one face exposed directly to rain and the opposite face sheltered have been measured. The amount of carbonates formed on mortars sheltered from rain is generally higher.
Yves F. Houst, Folker H. Wittmann
openaire   +1 more source

Measurement of beryllium depth profiles in carbon

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2004
Abstract This paper is concerned with the measurement of Be diffusion profiles in C by combining RBS and XPS sputter depth profiling. The total Be content in the samples was measured by RBS (2 MeV 4 He + ) at a scattering angle of 102° in order to increase depth resolution and sensitivity for Be.
Schmid, K., Wiltner, A., Linsmeier, C.
openaire   +2 more sources

Depth indicators in sedimentary carbonates

Marine Geology, 1967
Abstract Determination of depth criteria applicable to the study of ancient limestones can only be based on an understanding of modern carbonate sedimentation. Since oolites and micrites are frequently used as depth criteria in stratigraphic studies, our knowledge of their Recent counterparts is examined in some detail.
openaire   +1 more source

Pore Structural Changes and Carbonated Depth of Carbonated Steel Slag

Advanced Materials Research, 2011
Steel slag and carbon dioxide were used as raw materials to prepare building material by carbonation. Effects of forming pressure on carbonation of steel slag and carbonated depth were studied by pore structural changes before and after carbonation and carbonated region.
Hao Ze Wu, Jun Chang, Hua Wang
openaire   +1 more source

Minimal Drilling Technique to Measure Chloride-Penetration Depth and Carbonation Depth in Concrete

Journal of Materials in Civil Engineering, 2020
AbstractA method was investigated to determine concrete durability by measuring the carbonation depth and chloride ion (Cl−) penetration depth.
Shunsei Tanaka, Yuya Sakai
openaire   +1 more source