Filters
To search for and view publications, choose any or all of the criteria below and then click Begin Search
Key words to search for
(Enter key words related to the title, content, or author of a publication that interests you.)
Search for documents created
Showing 101-105 of 106 search results
In theory, the knowledge is available to ensure reliable fastenings with adhesive anchors and to give designers and installers confidence and flexibility in myriad applications. However, with the failure of adhesive anchors in Boston, MA, the installation and use of these types of anchors has been called into question. To figure out what can be improved with regard to the use of adhesive anchors, adhesive anchor installations with injection systems were monitored on 23 job sites in five locations scattered over the U.S. Critical aspects were examined to determine gaps between actual and recommended practice and to come up with proposals to improve installation practices.
Available in the following language(s): French
ASTM Subcommittee A01.05, Steel Reinforcement, has made a significant revision to A706/A706M "Standard Specification for Low-Alloy Steel Deformed and Plain Bars for Concrete Reinforcement." The specification was developed in the early 1970s in response to the structural engineering community’s requirements for steel reinforcing bars with controlled tensile properties for use in earthquake-resistant structures and restricted chemical composition for weldability. As of December, 2009, it includes requirements for bars with a minimum yield strength of 80 ksi (550 MPa) (designated as Grade 80 [550]). The increased yield strength was especially encouraged by structural engineers, bar producers, bar fabricators, and contractors from seismically active areas because higher strength bars can help reduce congestion of reinforcement and enhance constructibility, especially in earthquake-resistant structures.
Available in the following language(s): Spanish
Recently, ASTM International and the American Association of State Highway and Transportation Officials (AASHTO) have revised their cement standards to bring them more closely in line with each other. ASTM standards are used more often in commercial construction and AASHTO standards are used more often in transportation projects; there is some overlap in the use of the different standards. The organizations undertook the harmonization effort to help promote consistency and enhance durability.
Available in the following language(s): Spanish
We’re building a multistory reinforced concrete frame building and using 4 x 8 in. (100 x 200 mm) cylinders for acceptance testing at 28 days. The engineer of record says we need to average three cylinders for a test result instead of the two cylinders per test we were planning on. What is the standard number of cylinders that comprises a valid test? And if it is three, when did the requirement change from two to three cylinders?
Available in the following language(s): Spanish
Steel fiber-reinforced concrete contains short discrete fibers that must be uniformly distributed and randomly oriented throughout the concrete to improve its structural properties. Construction procedures for slabs-on-ground don’t differ greatly from those used in conventional concrete, but there are some key SFRC slab installation items that should be kept in mind to make the project go smoother. Mixture selection, mixing methods, placing, finishing, and jointing for steel fiber-reinforced concrete slabs are covered.
Available in the following language(s): Spanish