Specifications

Language: English
ISSN: 00083674
E-ISSN: 12086010
CODEN: CGJOAH
Document type: Journal article (JA)
Publisher: National Research Council of Canada, Buiding M 55, Ottawa, ONT K1A 0R6, Canada
Abstract: The coefficient of permeability of hydraulic asphalt concrete is in the range
10-8-10-10 cm/s. Laboratory test results show that triaxial specimens in axial compression can
undergo axial strains up to 18% without any significant increase in permeability until approaching
the compressive strength. For temperatures between 5 and 20 °C and strain rates between 2 ×
10-3%/s and 5 × 10-3%/s, conventional hydraulic asphalt concrete can tolerate 1%-3% tensile
strains before cracking in direct tension tests and strains up to 3%-4% in bending. At 20 °C the
tensile and bending strains at cracking are 2-4 times higher than those at 0 °C, and at -20 °C they
are approximately 0.2% and 0.8%, respectively. Asphalt concrete possesses pronounced crack
self-healing properties. In the experiments, the crack leakage rate dropped 1-4 orders of
magnitude within a few hours and the cracked specimens regained 55% of the intact tensile
strength after only 1 day of self-healing. In summary, the comprehensive series of laboratory
tests documents that asphalt concrete has characteristics that make the material extremely well
suited for use in impervious barriers in dams, and the test results reported herein can be of great
use in barrier design.
Number of references: 23
Main heading: Cracks
Controlled terms: Asphalt concrete - Concretes - Dams - Design - Tensile
strength
Uncontrolled terms: Coefficient of permeability - Cracking resistance - Direct tension
tests - Resistance to cracking - Self-healing - Self-healing properties - Water
barriers - Watertightness
Classification code: 408 Structural Design - 411.1 Asphalt - 412 Concrete - 421
Strength of Building Materials; Mechanical Properties - 441.1 Dams
DOI: 10.1139/cgj-2011-0443
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
© 2013 Elsevier Inc. All rights reserved.
20130502 新增 7 条
1.
Accession number: 20131716237031
Title: Research on change structural characteristics of loess based on true triaxial tests
Authors: Deng, Guo-Hua1 ; Shao, Sheng-Jun2/邓国华;邵生俊
Author affiliation: 1 The Technology Department of Xi'an Metro Ltd., Xi'an 710018, China
2 Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048, China
Corresponding author: Deng, G.-H. ([e-mail])
Source title: Yantu Lixue/Rock and Soil Mechanics
Abbreviated source title: Rock Soil Mech
Volume: 34