AASHTO MP44_20

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Carl 2024-09-22 14 872.64KB 5 页 20星币
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Standard Specification for
Materials for Ultrathin
Bonded Wearing Course
AASHTO Designation: MP 44-201
Technical Subcommittee: 5b, Bridge and
Pavement Preservation
Release: Group 1 (April)
American Association of State Highway and Transportation Officials
555 12th Street NW, Suite 1000
Washington, DC 20004
Accessed by account: University of Michigan | Date: Sun Jan 17 14:28:41 2021 | IP address: 141.213.172.10
TS-5b MP 44-1 AASHTO
Standard Specification for
Materials for Ultrathin
Bonded Wearing Course
AASHTO Designation: MP 44-201
Technical Subcommittee: 5b, Bridge and
Pavement Preservation
Release: Group 1 (April)
1. SCOPE
1.1. This standard covers the requirements for polymer-modified emulsified asphalt, performance-
graded asphalt binder, mineral aggregate, mineral filler, and additives used in an ultrathin bonded
wearing course. An ultrathin bonded wearing course, usually 1/2 to 1 in. (12.5 to 25.4 mm) thick is
placed on existing pavement surfaces using specially designed paving machines.
2. REFERENCED STANDARDS
2.1. AASHTO Standards:
M 17, Mineral Filler for Bituminous Paving Mixtures
M 295, Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
M 303, Lime for Asphalt Mixtures
M 316, Polymer-Modified Emulsified Asphalt
M 320, Performance-Graded Asphalt Binder
M 332, Performance-Graded Asphalt Binder Using Multiple Stress Creep Recovery (MSCR)
Test
PP 100, Ultrathin Bonded Wearing Course Design
T 49, Penetration of Bituminous Materials
T 59, Emulsified Asphalts
T 84, Specific Gravity and Absorption of Fine Aggregate
T 85, Specific Gravity and Absorption of Coarse Aggregate
T 96, Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in
the Los Angeles Machine
T 104, Soundness of Aggregate by Use of Sodium Sulfate or Magnesium Sulfate
T 112, Clay Lumps and Friable Particles in Aggregate
T 176, Plastic Fines in Graded Aggregates and Soils by Use of the Sand Equivalent Test
T 210, Aggregate Durability Index
T 301, Elastic Recovery Test of Asphalt Materials by Means of a Ductilometer
T 304, Uncompacted Void Content of Fine Aggregate
T 327, Resistance of Coarse Aggregate to Degradation by Abrasion in the Micro-Deval
Apparatus
© 2020 by the American Association of State Highway and Transportation Officials.
All rights reserved. Duplication is a violation of applicable law.
Accessed by account: University of Michigan | Date: Sun Jan 17 14:28:41 2021 | IP address: 141.213.172.10
TS-5b MP 44-2 AASHTO
T 331, Bulk Specific Gravity (Gmb) and Density of Compacted Asphalt Mixtures Using
Automatic Vacuum Sealing Method
T 335, Determining the Percentage of Fracture in Coarse Aggregate
2.2. ASTM Standard:
D4791, Standard Test Method for Flat Particles, Elongated Particles, or Flat and Elongated
Particles in Coarse Aggregate (withdrawn 2019)
3. TERMINOLOGY
3.1. Definitions:
3.1.1. asphalt pavement surface layer—The ultrathin bonded wearing course shall be a 1/2- to 1-in.
(12.5- to 25.4-mm) thick mix and consist of a polymer-modified emulsified asphalt membrane
followed immediately with an ultrathin gap graded asphalt mixture. The ultrathin bonded wearing
course shall be placed using an integrated distributor-paver to apply the bonded wearing course.
3.1.2. rapid-setting type anionic polymer-modified emulsified asphalt—Emulsified asphalt RS-1P
contained in Section 5.
3.1.3. rapid-setting type cationic polymer-modified emulsified asphalt—Emulsified asphalt CRS-1P
contained in Section 6.
4. SIGNIFICANCE AND USE
4.1. This standard may be used to select and evaluate materials for the construction of an ultrathin
bonded wearing course. The design recommendations for an ultrathin bonded wearing course may
be found in PP 100.
5. ANIONIC POLYMER-MODIFIED EMULSIFIED ASPHALT
REQUIREMENTS
5.1. Anionic polymer-modified emulsified asphalt for ultrathin bonded wearing course shall meet the
requirements of Table 1. The emulsified asphalt classification is determined by the owner agency
utilizing regional climatic and traffic conditions.
Table 1—Anionic Polymer-Modified Emulsified Asphalt Specification
Tests on Emulsion
Method
Minimum
Maximum
Viscosity, Saybolt Furol @ 122°F (50°C), s
T 59
20
100
Storage Stability 24 h, %
T 59
—
1.0
Demulsibility, 35 mL 0.02 N CaCL2, %
T 59
40
—
Sieve, %
T 59
—
0.05
Evaporation Residue, %
T 59
63
—
Tests on Residue from Evaporation
Penetration @ 77°F (25°C), dmm
T 49
80
150
Elastic Recovery @ 77°F (25°C), %
T 301
50
—
© 2020 by the American Association of State Highway and Transportation Officials.
All rights reserved. Duplication is a violation of applicable law.
Accessed by account: University of Michigan | Date: Sun Jan 17 14:28:41 2021 | IP address: 141.213.172.10
摘要：

AASHTO MP44_20 是由美国国家公路与运输官员协会（AASHTO）发布的一项最新材料规范标准，主要针对桥梁工程中使用的结构钢材性能提出了严格要求。该标准规定了高强度低合金钢的化学成分、力学性能、焊接工艺及质量控制指标，旨在提升桥梁结构的耐久性与安全性。适用于公路桥梁、铁路桥梁及大型基础设施项目中的钢结构设计与施工。了解 AASHTO MP44_20 有助于工程师、承包商和材料供应商确保选材合规，满足现代桥梁工程对疲劳性能、抗腐蚀性和可焊性的高标准需求，是桥梁建设领域重要的技术参考文件。

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作者：Carl 分类：国外协会 价格：20星币 属性：5 页 大小：872.64KB 格式：PDF 时间：2024-09-22

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