Comprehensive Evaluation of AIMS Texture, Angularity, and Dimension Measurements

Date

2010-04-01

Author

Mahmoud, Enad
Gates, Leslie
Masad, Eyad
Erdoğan, Sinan Turhan
Garboczi, Edward

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

263
views

0
downloads

Aggregates are the most widely used construction materials in the world in structures built from both asphaltic and portland cement concrete composites. The performance of these composites is affected by aggregate shape characteristics (e.g., angularity, texture, and dimensions). The aggregate imaging system (AIMS) is a computer automated system that was developed to measure aggregate shape characteristics using digital camera images of aggregates. This paper addresses four issues concerning AIMS measurements: (1) enhanced ways of handling and classifying the large data sets typically generated; (2) enhanced automation in processing fine aggregate images that appear to contain touching particles; (3) an improved consideration of measurement variability or repeatability between different operators, different AIMS units, and for aggregate placement and orientation; and (4) comparison of AIMS dimensional measurements with true three-dimensional measurements using X-ray computed tomography on a large coarse aggregate data set. The various aggregate sets used in this study covered a broad range of angularity and texture. The AIMS measurements of the ratios of dimensions were found to have excellent agreement with the more accurate X-ray computed tomography values, but the measurements of the individual dimensions were systematically low by about 10%.

Subject Keywords

General Materials Science, Mechanics of Materials, Civil and Structural Engineering, Building and Construction

URI

https://hdl.handle.net/11511/38467

Journal

JOURNAL OF MATERIALS IN CIVIL ENGINEERING

DOI

https://doi.org/10.1061/(asce)mt.1943-5533.0000033

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Evaluation of the Predictive Models for Stiffness, Strength, and Deformation Capacity of RC Frames with Masonry Infill Walls Turgay, Tahsin; Durmus, Meril Cigdem; Binici, Barış; Ozcebe, Guney (American Society of Civil Engineers (ASCE), 2014-10-01) Buildings with masonry infill walls (MIWs) in reinforced concrete (RC) frames are commonly used all around the world. It is well known that infill walls may affect the strength, stiffness, and displacement ductility of the structural system. Different approaches have been adopted in different codes and guidelines to consider the stiffness and strength contribution of MIWs on RC frame behavior. This study compares the ability of the existing guidelines to estimate stiffness, strength, and deformability of RC...
Seismic strengthening of reinforced concrete frames by precast concrete panels BARAN, MEHMET; Susoy, M.; Okuyucu, D.; Tankut, T. (Thomas Telford Ltd., 2011-05-01) An innovative occupant-friendly retrofitting technique has been developed for reinforced concrete (RC)-framed structures which constitute the major portion of the existing building stock. The idea is to convert the existing hollow brick infill wall into a load-carrying system acting as a cast-in-place concrete shear wall by reinforcing it with relatively thin high-strength precast concrete panels epoxy bonded to the plastered infill wall and epoxy connected to the frame members. In this study, results of 11...
Seismic strengthening of pin-connected precast concrete structures with external shear walls and diaphragms KAPLAN, HASAN; NOHUTCU, HALİL; ÇETİNKAYA, NİHAT; Yilmaz, Salih; Gonen, Hasan; Atimtay, Ergin (Precast/Prestressed Concrete Institute, 2009-12-01) Pin-connected precast concrete structures are widely used in some European countries of moderate seismicity. However, this structural system is not earthquake resistant because it does not have enough lateral stiffness or lateral-load resistance. Lack of a rigid diaphragm at the roof level imposes severe forces to connections.
Numerical Study on CFRP Strengthening of Reinforced Concrete Frames with Masonry Infill Walls Akin, Emre; Ozcebe, Guney; Canbay, Erdem; Binici, Barış (American Society of Civil Engineers (ASCE), 2014-04-01) In the last decade, a new strengthening methodology has been developed for reinforced concrete (RC) frames with hollow clay tile (HCT) infill walls by means of diagonally applied carbon fiber-reinforced polymer (CFRP) fabrics. In the experimental part of a study conducted by the authors, this user-friendly methodology was experimentally investigated considering different aspect (height/width) ratios of the infill walls. In this study, first a numerical model of the FRP strengthened infill walls strengthened...
SEISMIC SHEAR CAPACITY OF REINFORCED MASONRY PIERS Sucuoğlu, Haluk (American Society of Civil Engineers (ASCE), 1991-07-01) Masonry buildings have been, and remain, a popular form for economically enclosing space. Whereas such buildings are safe under gravity loads, most are vulnerable to horizontal loads due to earthquakes. Observations following an earthquake and experimental programs have shown that piers between openings are the most vulnerable part of a masonry building, and that the failure of such piers is due in the majority of cases to shear (or diagonal tension). Accordingly, the study described concerns the seismic...

Citation Formats

E. Mahmoud, L. Gates, E. Masad, S. T. Erdoğan, and E. Garboczi, “Comprehensive Evaluation of AIMS Texture, Angularity, and Dimension Measurements,” JOURNAL OF MATERIALS IN CIVIL ENGINEERING, pp. 369–379, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38467.