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Home > Publications > International Concrete Abstracts Portal
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.
Showing 1-5 of 42 Abstracts search results
Document:
CI4612ConcreteQA
Date:
December 1, 2024
Publication:
Concrete International
Volume:
46
Issue:
12
Abstract:
This Q&A focuses on comparison of a level straightedge used when performing ASTM E1155 or ASTM E1486 testing versus a manual straightedge used in the manual straightedge method described in ACI 117-10(15). Additional information on requirements related to performing the manual straightedge method is also provided.
DOI:
10.14359/51744365
CI4503Q&A
March 1, 2023
Author(s):
Bruce A. Suprenant and Jim Klinger
45
3
This month’s Q&A discusses a disagreement between a subcontractor and a general contractor (GC) on tolerances governing concrete work on the project. While the subcontractor believes that 1 in. tolerances in ACI 117-10(15) for horizontal deviations for edge-of-slab location and column location apply, the GC insists on a zero-tolerance condition illustrated in a detail drawing.
10.14359/51738696
CI4501Q&A
January 1, 2023
1
Q: We recently completed a mid-rise concrete building. During construction, the owner’s testing agency conducted independent F-number and survey checks at all floor levels. The results indicated compliance with ACI 117-10(15)1 tolerances for floor flatness and top-of-slab elevations stated in the construction documents. We have just been advised that the window wall installer has complained that the full-height windows don’t fit between the slabs. Arguing that the separation between two slabs is considered an opening and therefore has a tighter tolerance than the slab elevation tolerances, the window installer is pressuring the owner to backcharge us to cover the cost of rework. We don’t think the space between two slabs constitutes an opening. Does ACI provide guidance on this tolerance issue?
10.14359/51738472
CI4409Zhang
September 1, 2022
Lingfeng (Leo) Zhang, James Klinger, and Bruce A. Suprenant
44
9
In December 2021, the American Society of Concrete Contractors (ASCC) initiated a study focused on laser scanning results and deliverables for slabs-on-ground to provide recommendation to Joint ACI-ASCC Committee 117, Tolerances. The article discusses slab thickness and F-numbers results from this study, possible issues with laser scan results, and provides recommendations for organization and presentation of laser scan results for a slab-on-ground.
10.14359/51737204
CI4407ZhangA
July 1, 2022
7
ACI 117-10(15) provides tolerances for core test and impact-echo thickness measurements. These measurement techniques as well as laser scanning and ground-penetrating radar were used to collect thickness data from a slab-on-ground test panel. The data was then analyzed to determine appropriate average and individual thickness tolerances for all these test methods.
10.14359/51735988
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