Results 221 to 230 of about 24,987 (266)

Compressive strength of heated high-strength concrete

Magazine of Concrete Research, 2007
The present study is aimed to study the effect of elevated temperatures ranging from 50 to 250°C on the compressive strength of high-strength concrete (HSC) of M60 grade made with ordinary portland cement (OPC) and pozzolona Portland cement (PPC). Tests were conducted on 100 mm cube specimens. The specimens were heated to different temperatures of 50,
M. Potha Raju, K. Srinivasa Rao, P. S. N. Raju   +2 more
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Effect of electrolysis on the compressive strength of cement and concrete

Proceedings of the American Institute of Electrical Engineers, 1914
A paper on ``The Electrolytic Corrosion of Reinforced Concrete'', by C.E. Magnusson and G. H. Smith, was read before the A. I. E. E. June 30, 1911, and, as stated in that paper, the results could not be pronounced entirely conclusive, as the duration of the experiments was only 30 days.
C. Edward Magnusson, B. Izhuroff
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Nature of compression strength in concrete

Magazine of Concrete Research, 1992
A compression strength theory for concrete based on the capillary porosity of binder paste in concrete and the intrinsic tensional strength of the CSH gel is presented. The capillary pores were modelled as spheres of equal radius and the tensional stress peak on the surface of the voids was calculated using a FEM program.
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Anisotropic Concrete Compressive Strength in Existing Structures

IABSE Reports, 2019
<p>Assessment of the load‐carrying capacity of existing concrete structures is often based on the concrete compressive strength obtained from drilled cores. These cores are typically drilled perpendicular to the concrete surface, under the assumption that the mechanical properties of the concrete are isotropic.
Hansen, S.G., Meinen, N.E., Jørgensen, H.B.   +2 more
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On compressive strength variation in concrete

Matériaux et Constructions, 1971
The interrelationship of the standard deviation, the coefficient of variation, and the compressive strength of concrete was studied on 32 building sites and 14 ready-mix plants, with more than 30,000 observations analysed. While the standard deviation was found to be practically strength-independent when overall values were considered, the coefficient ...
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Compressive strength and modulus of elasticity of freshly compressed concrete

Construction and Building Materials, 2012
Abstract This paper is going to offer an interesting solution to enhance the compressive behavior of concrete in terms of strength and modulus of elasticity. In the presented method, by compressing the fresh concrete in a fabricated pressure apparatus, the excess water of concrete is expelled and the percent void is remarkably decreased.
M. Nematzadeh, M. Naghipour
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COMPRESSIVE STRENGTH OF REINFORCED CONCRETE MASONRY WALLS

2005
The strength of reinforced concrete masonry walls formed with mortared stretcher bonded concrete ‘H’ blocks, core filled with high slump grout and centrally reinforced with unrestrained reinforcement is investigated. Codes of practice consider masonry walls with unrestrained reinforcement to be unreinforced.
Mullins, P. J., Dux, P.
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Compressive Strength Reduction of Concrete Subjected to Hydrostatic Compression

Applied Mechanics and Materials, 2012
An experimental study of the damage behavior of two kinds of concrete with different strength grades has been performed using 100mm cubes subjected to increasing hydrostatic loading history, namely, the isotropic compression at high pressure. The compressive strength and ultrasonic velocity are measured before and after loading history, respectively ...
Jing Zhou Lu, Lin Chen, Xu Zhu, Na Xu, Gao Lin   +4 more
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Prediction of compressive strength of concrete

Matériaux et Constructions, 1974
The paper, which summarises a survey and an analysis of empirical strength laws, was undertaken with a view to formulating a strength law interrelating the water-cement ratio-which determines the porosity of the hardened cement-paste-and Powers's Gel/Space ratio, giving the relative strength of the cement stone.
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Testing High-Strength Concrete Compressive Strength

ACI Materials Journal, 1993
Comparative testing reveals that high strength concrete (HSC) compressive strength values are greater by 5% when measured on 100 x 200 mm specimens. Moreover, the coefficient of variation on one set of three 100 x 200 mm specimens is as small as, or smaller than that for 150 x 300 mm specimens.
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