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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 55 Abstracts search results
Document:
CI4408ConcreteQA
Date:
August 1, 2022
Publication:
Concrete International
Volume:
44
Issue:
8
Abstract:
This month’s Q&A focuses on evaluation and comparison of test results provided by owner’s and concrete producer’s testing agencies. It discusses responsibilities of the owner’s testing agency specified in ACI 301-20 as well as acceptable differences in test results based on interlaboratory studies and precision statements provided in relevant ASTM standards.
CI4310Q&A
October 1, 2021
43
10
This month’s Q&A deals with additions of air-entraining agent at a jobsite for concretes delivered with air content lower than specified on a project. It discusses relevant information provided in ACI 301-20 and ASTM C94/C94M-21a as well as limits on the number of revolutions and time to the end of discharge as currently specified in ASTM C94/C94M. The Q&A also includes a paragraph on testing and accepting air content in pumped concrete.
CI4307Q&A
July 1, 2021
7
Minimum lap splice lengths for welded wire reinforcement (WWR) are presented in Section 25.5.4 of ACI 318-19 and Section 3.3.2.5(a) of ACI 301-20. In this Q&A, these requirements are interpreted for slabs-on-ground that are not included as part of a building’s lateral force-resisting system. In addition, the Q&A discusses crack control recommendations for slabs-on-ground per ACI 360R-10.
CI4302ConcreteQA
February 1, 2021
2
Even though ACI does not offer a standard specification for proof-rolling of a prepared base for a slab-on-ground, related requirements and recommendations are provided in ACI 301-20, ACI 360R-10, and ACI 302.1R-15. Excerpts from these documents are provided, along with recommendations and examples that readers may use to develop specification language for proof-rolling.
CI4301Knowledge
January 1, 2021
1
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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.
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