12-08-2017, 05:15 AM
Concrete International December 2017 No. 12 Complete Issue
Author(s)/Editor(s): ACI International | Size: 9.47 MB | Format: PDF | Quality: Original preprint | Publisher: ACI International | Year: 2017 | pages: 88
Author(s)/Editor(s): ACI International | Size: 9.47 MB | Format: PDF | Quality: Original preprint | Publisher: ACI International | Year: 2017 | pages: 88
Dispersion of Fibers in Ultra-High-Performance Concrete
Fiber balling is a challenge in scale-up production of ultra-high-performance concrete (UHPC) using conventional concrete mixing practices. Therefore, many producers resort to the use of specialty mixers, and this increases the cost of UHPC. This article presents an investigation into resolving fiber balling issues by adjusting the types, shapes, and sizes of fibers in the mixtures.
Titanium Finds a Home in Civil Engineering
The Oregon Department of Transportation has completed a bridge rehabilitation project using titanium bars. Girders on three of the four bridge spans of an overpass near Mosier, OR, were strengthened using a total of 70 titanium near surface mounted bars, a solution based on research conducted at Oregon State University. In addition to high tensile strength, ductility, and environmental durability, titanium offers high shear strength and resistance to mechanical damage, high maximum service temperature, and thermal expansion compatibility with concrete.
Concrete Product & Service Guide
Company Directory
2018 ACI Honors and Awards Program
The American Concrete Institute showcases the contributions and efforts of its global membership and the concrete industry worldwide through its varied honors and awards program. ACI is seeking nominations for the 2018 award cycle.
ACI Officer Nominations for 2018-2019
LafargeHolcim Awards 2017 North America
The Strength of Circles
Tokyo-based design firm nendo created a new plaza, called CoFuFun, in the small town of Tenri, Nara, Japan. The plaza features five discs, placed at four different heights, each with concentric stairs that also act as benches and amphitheater seating. The precast manufacturer created the discs by casting precast concrete pieces as giant pizza slices. Each disc comprises up to 37 different pieces (slices).
The Challenges of Achieving Compatibility in Concrete Repair
The issue of compatibility in engineered repair composite systems is usually ignored or misinterpreted by design engineers, often due to a lack of knowledge and/or misleading guidance. The authors discuss some of the critical issues concerning the achievement of compatibility in a concrete repair composite system and its influence on repair durability. They also point out important gaps in the industry’s basic knowledge of the subject.
Concrete Q&A: Rebound Hammer and In-Place Strength Testing; Tolerances for Concrete Slabs Supporting Steel Tanks
Q. According to Provision 1.6.4.2 of ACI 301-16,1 a rebound hammer cannot be used for in-place strength testing. Does ACI recommend any other nondestructive testing (NDT) method for in-place strength evaluation? Q. My company will be placing a concrete slab foundation designed to directly support the base of a steel tank. Does ACI have any documents that discuss tolerances for elevation of such slabs after placement?
Code:
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:
http://forum.civilea.com/thread-27464.html
***************************************
Code:
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:
http://forum.civilea.com/thread-27464.html
***************************************
This post has been made by CivilEA Post-Generator V2.3.1
The expert doesn't think, the expert knows.