https://yse.yabesh.ir/std/handle/yse/174 2026-04-13T02:18:48Z 2026-04-13T02:18:48Z ACI - American Concrete Institute https://yse.yabesh.ir/std/handle/yse/280707 2020-08-03T12:00:05Z 2020-01-01T00:00:00Z

Ward R.Malisch Concrete Construction Symposium; ACI SP-338 ACI - American Concrete Institute Following that, he taught courses in concrete construction at the University of Missouri-Rolla (now Missouri University of Science and Technology) where he received several awards for outstanding teaching. In subsequent years, Malisch served as director of engineering and later as senior managing director at the American Concrete Institute. Along with the ACI Strategic Development Council, ASCC, and Construction Technology Laboratories, he helped to organize an Inter-Industry Working Group on Concrete Floor Issues that brought together leaders from several construction and flooring industry groups. Implementing Best Practices to Improve Quality and Constructability of Hot Weather Concreting... In summary, he said: “We need a yardstick for rating concrete surfaces with respect to bugholes, and more know-how on how they can better be controlled

2020-01-01T00:00:00Z ACI - American Concrete Institute https://yse.yabesh.ir/std/handle/yse/280696 2020-08-03T12:00:02Z 2020-01-01T00:00:00Z

Performance-Based Seismic Design of Concrete Buildings: State of the Practice; ACI SP-339 ACI - American Concrete Institute PROJECT SCOPE AND COMPLEXITIES The Lower Sproul Plaza project redeveloped one of the busiest areas in UC Berkeley campus, and included work in multiple adjacent structures that were separated by seismic joints from each other. The following factors contributed to complexity to the project: new construction, retrofit of existing structures, use of different construction materials, desire for a higher seismic structural performance for the buildings, reduction of impact on the existing structures, and the close proximity among these different buildings in a limited construction site (including the adjacent Zellerbach Hall and Cesar Chavez Student Center, which remained open during construction). Given the large number of different goals for the use of concrete in various elements and buildings, including elaborate board-formed patterns in the exposed concrete walls, the project had nearly 20 different concrete mix designs

2020-01-01T00:00:00Z ACI - American Concrete Institute https://yse.yabesh.ir/std/handle/yse/280685 2020-08-03T11:59:59Z 2020-01-01T00:00:00Z

Guide to Placing Concrete with Belt Conveyors; ACI 304.4R ACI - American Concrete Institute Users who have suggestions for the improvement of ACI documents are requested to contact ACI via the errata website at http://concrete.org/Publications/ DocumentErrata.aspx. Proper use of this document includes periodically checking for errata for the most up-to-date revisions. ACI committee documents are intended for the use of individuals who are competent to evaluate the significance and limitations of its content and recommendations and who will accept responsibility for the application of the material it contains. Participation by governmental representatives in the work of the American Concrete Institute and in the development of Institute standards does not constitute governmental endorsement of ACI or the standards that it develops. This report includes a short history on the early development of conveyor belts for transporting and placing concrete; the design of conveyor systems in relation to the properties of the plastic concrete, the delivery rate, and the job specifications; as well as belt widths, speeds, and angles of inclination as they apply to specific site requirements. Concrete placement by belt conveyors should be a continuous operation

2020-01-01T00:00:00Z ACI - American Concrete Institute https://yse.yabesh.ir/std/handle/yse/280674 2020-08-03T11:59:56Z 2020-01-01T00:00:00Z

Dennis Mertz Symposium on Design and Evaluation of Concrete Bridges; ACI SP-340 ACI - American Concrete Institute The Symposium Publication (SP) is expected to be an important reference in relation to design philosophies and evaluation methods of new and existing concrete bridges and structures. Industry liaison was provided by the Prestressed Concrete Institute and the American Segmental Bridge Institute. Design for flexure in B-Regions is based upon the conventional beam theory of Article 5.6 while the design for shear in B-Regions is based on conventional beam theory in conjunction with the truss analogy of Article 5.7. The provisions apply to components with reinforcement yield strengths not exceeding 75.0 ksi (520 MPa) and with normal weight concrete compressive strengths for use in design up to 15.0 ksi (105 MPa). Based on a comparison of load factors and resistance factors for concrete design in the ACI and AASHTO specifications it was concluded that the strength reduction factors in ACI 318-14 Chapter 17 [10] are reasonable and possibly somewhat conservative for this first introduction of anchor design into the AASHTO LRFD

2020-01-01T00:00:00Z