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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 36 Abstracts search results
Document:
SP206-20
Date:
April 1, 2002
Author(s):
E. E. Naaman
Publication:
Symposium Papers
Volume:
206
Abstract:
Ferrocement and more generally laminated cement based composites are in a state of revival worldwide. Looking back and looking ahead, this paper focuses on three aspects of development that are at the basis of the current revival of ferrocement: 1)the application side, where some new limits and new daring ideas were demonstrated; 2) the professional side, particularly the activities of the International Ferrocement Society and the publication of the first Ferrocement Model Code, and 3) the technical side, where high performance fiber reinforced polymeric (FRP) meshes are introduced either alone or in combination with fibers or micro-fibers leading to hybrid composites with improved performance and reduced cost. Prospects for the near future are also discussed.
DOI:
10.14359/12261
SP206-18
I. Pane and W. Hansen
A current research project on hydration kinetics, mechanical properties and early age stress behavior of blended cement conducted at the University of Michigan is reviewd in this paper. A number of experiments including calorimetry and differential thermal analysis were performed to investigate hydration kinetics. The mechanical properties investigated included the compressive strength, splitting tensile strength, Young's modulus, creep compliance, relaxation modulus, and coefficient of thermal dilation. The early age stress behavior was studied by measuring the stress developed in a uniaxially restrained concrete member. In addition, the deformation due to autogeneous shrinkage was also measured experimentally. The experimental data could be used to quantify degree of hydration,, and temperature effects on hydration, and could be used as imputs for predicting the early age stress development in concrete.
10.14359/12259
SP206-23
V. C. Li
This article reviews the recent advances in the research of Engineered Cementitious Composites (ECC), a class of microstructurally tailored fiber reinforced cementitious composites. The design basis, the processing routes, and some ECC performance characteristics in structural applications are highlighted. This article is dedicated to Professor Surendra Shah, in honor of his seminal contributions to research and education in advanced cementitious materials over the last several decades
10.14359/12264
SP206-01
T. C. Hsu and M. Y. Mansour
The load-deformation response of R/C membrane elements (panels) subjected to reversed cyclic shear shows that the orientation of the steel bars with respect to the principal coordinate of the applied stresses has a strong effect on the "pinched shape" of the post-yield hysteretic loops. When the steel bars in a panel are oriented in the coordinate of the applied principal stresses, there is no "pinching effect," and the panel exhibits ductile behavior and high capacity of energy dissipation. Whereas, when the steel bars are oriented at an angle of 45 degrees to the applied principal stresses, severe pinching effect is observed and the panel becomes more brittle. This paper presents concisely a rational theory, called the Cyclic Softened Membrane Model (CSMM). This new rational theory is capable of predicting the entire history of the hysteretic loops (pre-and post-yeild); can explain the mechanism behind the "pinching effect"; and can elucidate the failure mechanism that causes the deteriorations of reinforced concrete structures under cyclic loading.
10.14359/12242
SP206-05
P. Paramasivam, K. C. g. Ong, and W. Xu
The service performance of repaired structures depends mainly on the mechanical properties of the substrate and repair materials and the mechanical behavior of the interface between them. However, in most studies in the literature, on ly bond strength is used to evaluate the repair and the deformation behavior of the interface is usually neglected. In this study, three slabs were cast using conventional concrete as a substrate. The substrate surface was roughened with jackhammers. A layer of 50-60 mm repair materials were cast by shotcreting or by hand. The test specimens were cored or cut to the required size. Direct tensile and compression tests were performed to evaluate the bond strength and mechanical behavior of the interface between substrate and repair materials. The test results indicate that the bond strenght was affected by the mix proportions and independent on the casting method and the inclusion of steel fibers. However the casting methods had a strong influence on the mechanical behavior of the interface between substrate and repair material.
10.14359/12246
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