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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 35 Abstracts search results
Document:
CI4107DU
Date:
July 1, 2019
Author(s):
Chongjiang Du
Publication:
Concrete International
Volume:
41
Issue:
7
Abstract:
The article discusses the use of magnesium oxide-based shrinkage-compensating concrete (MgO concrete) in construction of roller-compacted concrete (RCC) dams. The delayed autogenous expansion of MgO concrete roughly matches the shrinking process of dam mass concrete as its temperature drops and helps to prevent thermal cracking. Using MgO concrete in RCC dams can result in simplification of temperature control measures as well as shorten the construction period.
CI4002Bass
February 1, 2018
Randall P. Bass and Gary Horninger
40
2
Key features of roller-compacted concrete (RCC) dams are highlighted, using various dam types as examples. Topics include lift interfaces, facing systems, spillways, intakes and outlets, internal galleries, and joints. Test sections are recommended for training and to demonstrate that the systems, methods, and equipment proposed for a project will meet project specifications.
CI3811Du
November 1, 2016
38
11
An arch-gravity roller-compacted concrete (RCC) dam on the Gomal River, Pakistan, was built from 2008 to 2012. Temperature control measures were required during construction to prevent thermal cracking of RCC in hot weather. The article provides detailed descriptions of these measures, specifically the precooling of aggregates and mixing water and post-cooling of the placed RCC.
CI3103Yang
March 1, 2009
Lei Yang and Jonathan J. Shi
31
3
Longtan Dam is a roller-compacted concrete (RCC) dam currently under construction in Guangxi Province, China. Due to its height and large volume, there are a great number of horizontal construction joints, and many of them may become cold joints during construction because weather conditions in the region often disrupt construction. In this study, different methods for treating layer joints in the Longtan RCC project were analyzed. The objective was to identify an efficient, easy-to-use treatment method that can meet the bonding requirements. The findings will help expedite construction and ensure high quality.
CI2401Hess
January 1, 2002
John R. Hess
24
1
Horizontal lift joints in roller-compacted concrete (RCC) structures are planes of weakness subject to leakage, deterioration, and possible failure from tensile or shear stresses. RCC dams may have five times as many lift joints. With more lift joints in RCC, the risk of lift surface deficiency is somewhat greater than it is in conventional concrete dams. These deficiencies may reduce lift-joint tensile (bond) and shear strength. Consequently, the design and construction conditions for RCC dam lift joints must be no less rigorous than with conventional concrete dams, especially when seismic loading is anticipated.
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