Results 231 to 240 of about 9,010 (266)
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Microbial processes: Controls on the shape and composition of carbonate concretions
Marine Geology, 1993Abstract Shape, size and mineralogical/chemical compositions of carbonate concretions vary considerably. The questions to be answered are—Why do they form at all? What processes are involved? Why do they so often form as regular spheroids? Why do they sometimes form laterally-extensive bands?
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Graphene Oxide Admixed Aerated Concrete Composite with Carbon Fibres
Materials Today: Proceedings, 2018Abstract Concrete is the widely used construction material and research focus is towards customizing the mixture proportion to suit the application for various construction facilities. Advancement in construction industry has resulted in fast track construction facilities with the use of precast structural elements.
S. Geetha, M. Selvakumar
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Compressive Behavior of Concrete Confined by Carbon Fiber Composite Jackets
Journal of Materials in Civil Engineering, 2000This paper describes axial compression test results of 27 concrete cylinders confined by carbon fiber reinforced polymer composite jackets. The experimental parameters include plain concrete compressive strength and the thickness of the composite jacket.
Y. Xiao, H. Wu
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Stable isotope composition of the carbonate concretion in loess and climate change
Quaternary International, 1997Carbonate concretions are commonly found in the loess in China. Oxygen and carbon isotopic compositions of carbonate concretions collected from 14 different paleosols (S1–S14) in the Lishi Formation of Luochuan loess section, China were analysed. The isotopic compositions of concretion in loess are useful tools in paleoclimatic study.
Jiamao Han +4 more
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Evolution of pH and chemical composition of pore solution in carbonated concrete
Construction and Building Materials, 2012Abstract An investigation of carbonation in concrete, the pH and chemical composition change of the pore solution in concrete with different degrees of carbonation, was presented. The concrete samples were manufactured using ordinary portland cement and fly ash with dimension of 100 mm diameter by 3 mm in height, and six different mix proportions ...
Qi Pu +5 more
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Bond strength of carbon fiber composites glued to concrete surface
Structural Concrete, 2017This paper describes an analytical study about the bond between concrete and glued carbon fiber composites (CFCs) using data of 2 experimental researches. A total of 27 double compression‐tension tests were carried out on specimens with 2 concrete cubes (fixed and movable) connected by carbon fiber strips on opposite sides.
Emil de Souza Sánchez Filho +3 more
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Carbon nanotube/cement composites for crack monitoring of concrete structures
Composite Structures, 2017Abstract The feasibility of using a carbon nanotube/cement composite as a crack sensor for concrete structures is evaluated. First, the relationship between the crack width and electrical conductivity of the composite material was investigated. Then, this analysis was repeated for the composite embedded in reinforced mortar beams, using three-point ...
Min-Ju Lim +3 more
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CORROSION 2015, 2015
Abstract The corrosion propagation of steel embedded in concrete is still not well understood. It is known that corrosion products build up and eventually cause cracks (when the metal loss reaches a critical penetration xcrit) by exceeding the tensile stress that concrete can support due to the larger volume that the corrosion products ...
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Abstract The corrosion propagation of steel embedded in concrete is still not well understood. It is known that corrosion products build up and eventually cause cracks (when the metal loss reaches a critical penetration xcrit) by exceeding the tensile stress that concrete can support due to the larger volume that the corrosion products ...
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The use of carbone fibre composite for strengthening reinforced concrete beams
STUDIES IN ENGINEERING AND EXACT SCIENCESThe study of different reinforced concrete structure pathologies helps to understand the main causes of materials as well as structures damage which are mainly due to bad detailing, poor design, and a lack of durability and to the aggressive external actions. Algeria is a country exposed to natural disasters. Thus, damaged buildings need strengthen and
Ahmed Laichaoui +3 more
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