Study On Effect Of Fiber Stabilizers On Water Temperature Cycle Damage Resistance Of Drainage Asphalt Mixtures,
2023
Nanchang Institute of Technology, Nanchang, Jiangxi 330099, China; 2. Tianquan County Transportation Bureau, Ya’an, Sichuan 625500, China
Study On Effect Of Fiber Stabilizers On Water Temperature Cycle Damage Resistance Of Drainage Asphalt Mixtures, Liu Fuming, Wu Di, He Qingde, Yang Zhiping
Journal of China & Foreign Highway
In order to study the effect of fiber stabilizer on the water temperature cycle damage resistance of drainage asphalt mixture, drainage asphalt mixture without fiber stabilizer and with wood fiber, polyester fiber, and basalt fiber, respectively, were compared through tests. By standard dispersion test and immersed dispersion test, the anti-spalling ability of the mixture was analyzed. Under the same asphalt condition, the standard dispersion loss of the drainage asphalt mixture was reduced to different degrees after adding fiber stabilizer, which could increase the anti-spalling property of the drainage asphalt mixture to some extent. The splitting, indirect tensile, and rutting tests …
Experimental Analysis On Recycling And Mechanical Properties Of Waste Cement,
2023
Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Experimental Analysis On Recycling And Mechanical Properties Of Waste Cement, Chen Liang
Journal of China & Foreign Highway
In order to recycle waste cement, construction waste cement materials were collected in the laboratory, and they were crushed, ground, and heat treated to facilitate reuse. Then, the waste cement was combined with the commonly used active fly ash admixture to prepare a new cement material for test analysis. The results show that the new cement material produced by industrial by-product, fly ash and waste cement material is feasible. A small amount of construction waste cement material (about 5%) can increase the 28-day compressive strength of cement by more than 50%, and the compressive strength of the prepared building material …
Experimental Study On Characteristics And Stability Of Different Aged Steel Slag Aggregate,
2023
Guangxi Transportation Science and Technology Group Co., Ltd., Nanning, Guangxi 530007, China; 2. Changsha University of Science & Technology, Changsha, Hunan 410114, China
Experimental Study On Characteristics And Stability Of Different Aged Steel Slag Aggregate, Zhang Hongri, Wang Guiyao, Feng Jian, Lan Tianzhu, Wu Tao
Journal of China & Foreign Highway
Steel slag aggregate has good building material properties, but the utilization rate of steel slag in road engineering is low at present. In this paper, the chemical composition, basic physical and mechanical indexes, f⁃CaO, f⁃MgO, pulverization rate, CRB expansion rate, and other indexes of open-air aged steel slag aggregate in Fangchenggang, Guangxi Province for 0, 6, and 12 months were studied. The results show that the physical and mechanical properties of steel slag aggregate basically meet the requirements of road base materials and subgrade fillers, but the indexes of f⁃CaO, pulverization rate, and CRB expansion rate of steel slag aggregate …
Influence Factors Of Deicing And Thaw Performance Of Asphalt Mixture With Low Freezing Point,
2023
Sichuan Highway Planning, Survey, Design, and Research Institute Ltd, Chengdu, Sichuan 611141, China; 2. Research and Development Center of Transport Industry of Technologies, Materials and Equipments of Highway Construction and Maintenance, Chengdu, Sichuan 611130, China; 3. Sichuan Provincial Laboratory of Pavement Structural Materials and Maintenance Engineering, Chengdu, Sichuan 611130, China
Influence Factors Of Deicing And Thaw Performance Of Asphalt Mixture With Low Freezing Point, Zhou Shuiwen, Lin Fang, Zhang Xiaohua, Zhang Lingbo, Jiang Haoqiu
Journal of China & Foreign Highway
The conductivity test was used to study the release law of thawing and deicing components. The freezing test was used to study the cooling law of the mixture, and the thawing rate test was used to study the thawing and deicing performance. The results show that the release of thawing and deicing components of materials with a low freezing point is temperature-dependent, and the release at the high temperature is 3.49–3.77 times that at the low temperature. The granular materials tend to dissolve in water, which results in the release rate of thawing and deicing components faster than that of …
Study On Thermal Property Of Fast Growing Grass Fiber And Its Asphalt Mortar,
2023
Southern Green Road Research Institute, Central South University of Forestry & Technology, Changsha, Hunan 410004, China
Study On Thermal Property Of Fast Growing Grass Fiber And Its Asphalt Mortar, Xia Chaoming, Jiang Kang, Wu Chaofan, Liu Kefei
Journal of China & Foreign Highway
In order to investigate the thermal properties of fast-growing grass fiber and its asphalt mortar, the physical properties and thermal properties of bamboo fiber, reed fiber, and its asphalt mortar were tested and compared with those of lignin fiber and its asphalt mortar by physical property test, thermal weight loss test, and differential scanning calorimetry test. The results show that the addition of plant fiber can effectively improve the high temperature performance of asphalt, but it has a slight inhibition effect on the low temperature performance of asphalt. The quality loss of plant fiber in different temperature ranges is the …
Study On Pavement Performance Of Waterborne Epoxy Emulsified Asphalt And Its Application In Micro‐Surface,
2023
Hubei Liantou Exian Investment Co., Ltd., Ezhou, Hubei 436000, China
Study On Pavement Performance Of Waterborne Epoxy Emulsified Asphalt And Its Application In Micro‐Surface, Jiang Hai, Liu Dachang
Journal of China & Foreign Highway
In order to improve the pavement performance at micro-surface, waterborne epoxy resin was used to modify the emulsified asphalt, and the compatibility, microstructure, mechanical properties, rheological properties, and pavement performance of mixtures of the modified emulsified asphalt were studied. The storage stability test shows that the epoxy emulsion has good compatibility with emulsified asphalt. With the increase in waterborne epoxy resin content, the modified emulsified asphalt tends to form an epoxy resin-dominated skeleton structure. At the same time, with the increase in waterborne epoxy resin content, the adhesion and mechanical properties of emulsified asphalt and aggregate are significantly improved. At …
Evaluation Of Anti‐Cracking Performance Of Recycled Concrete With Recycled Rubber/Sbs Composite Modified Asphalt,
2023
Qinghai Xihu Expressway Management Co., Ltd., Xining, Qinghai 810000, China
Evaluation Of Anti‐Cracking Performance Of Recycled Concrete With Recycled Rubber/Sbs Composite Modified Asphalt, Li Xiaobin
Journal of China & Foreign Highway
In order to improve the crack resistance of recycled asphalt mixture, a new styrenic block copolymer (SBS)/rubber composite modified asphalt with excellent crack resistance was proposed for the regeneration of reclaimed asphalt pavement (RAP). Based on the creep of low temperature bending beam, confined temperature stress, and four-point bending fatigue test, the low temperature cracking resistance and fatigue cracking performance of composite modified asphalt and SBS-modified asphalt were studied. The results show that the addition of rubber can improve the low temperature and medium temperature crack resistance of recycled asphalt concrete, which may be related to the propagation of micro-cracks …
Study On Anti‐Scattering Performance Of Asphalt Concrete On Aggregate Scattering Pavement Of Highway,
2023
Zhejiang Communications Group Testing Technology Co., Ltd., Hangzhou, Zhejiang 310000, China
Study On Anti‐Scattering Performance Of Asphalt Concrete On Aggregate Scattering Pavement Of Highway, Yang Siyuan, Chen Guiliang
Journal of China & Foreign Highway
Due to the lack of quantitative evaluation methods for aggregate scattering degree of expressway asphalt pavement in China and abroad, according to the disease characteristics of surface layer spalling, this paper adopted the Cantabro standard dispersion test to sample the concrete of the section with aggregate scattering of Huangqunan Expressway (G3) in Zhejiang Province. The dispersion impact damage modes of the mixture with different severity were analyzed, and the anti-dispersion performance of concrete was evaluated by mass loss rate and water absorption rate. The results show that aggregate scattering will reduce the density of the concrete structure at the surface …
Study On The Effect Of Quicklime On The Properties Of Cold Mix Asphalt,
2023
Jiangxi Communications Investment Group Co., Ltd., Nanchang, Jiangxi 330025, China;
Study On The Effect Of Quicklime On The Properties Of Cold Mix Asphalt, Liu Tao, Yi Ming, Song Tao
Journal of China & Foreign Highway
The low initial strength of cold mixed asphalt mixture leads to the delay of traffic opening time, and the large void ratio leads to poor water stability and other problems, which seriously hinder the development of cold mixed environment-friendly construction mode. In this paper, based on the principle that the heat of quicklime in the presence of water promotes the rapid loss of water in the cold mixed mixture, the mixing test and cohesion test of the MS-3 slurry cold mixed asphalt mixture with quicklime were carried out to explore the influence of quicklime on the demulsification time and cohesion. …
Research On Design Process Of Toll Interchange‐Expressway In The Area Of Funiu Mountain,
2023
Henan Provincial Communications Planning & Design Institute Co., Ltd., Zhengzhou, Henan 450000, China
Research On Design Process Of Toll Interchange‐Expressway In The Area Of Funiu Mountain, Zhang Jie, Yang Qing, Chai Xiaolong
Journal of China & Foreign Highway
Currently, the expressways under construction in Henan Province are mainly concentrated in the Funiu Mountain area in the west, such as Yaoshan–Luanchuan–Xixia Expressway, Xixia–Xichuan Expressway, Yingchi–Luanchuan Expressway, and Luanchuan–Lushi Expressway. These projects are characterized by complex terrain conditions, difficult design, large-scale engineering, and a cluster of long tunnels and grand bridges. Under such complex conditions, how to arrange the interchange reasonably and ensure the optimal project plan becomes the key point of successful project design. This paper summarized the typical characteristics of toll interchange in Funiu Mountain area in recent years and put forward the design process of design preparation, …
Variable Speed Limit Control Method For Highway Under Dense Fog,
2023
School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China
Variable Speed Limit Control Method For Highway Under Dense Fog, Sun Jiancheng, Qiao Jiaxing
Journal of China & Foreign Highway
In order to solve the problem of traffic safety on expressways under dense fog and change the original fixed speed limit measures, a variable speed limit control method based on the safe allowable speed was proposed. The speed limit value was calculated based on the regulations in road traffic safety law on the speed under dense fog by considering that the traffic law does not mention the road alignment conditions, road conditions, and other factors, and the monitor data was used to approximate replace the data of individual vehicles for data optimization, and the safe speed and safe distance of …
Study On Dynamic Allocation Optimization Of Highway Pavement Maintenance Funds,
2023
Jiangxi Ganyue Expressway Engineering Co., Ltd., Nanchang, Jiangxi 330069, China
Study On Dynamic Allocation Optimization Of Highway Pavement Maintenance Funds, Zou Yi
Journal of China & Foreign Highway
The conflict between the lack of maintenance funds and the growth of maintenance demand restricts the improvement of highway pavement technologies. In this paper, the state space of pavement maintenance demand was defined by the technical condition of the pavement, and the state of demand under different maintenance measures was designed as a Markov decision process. The dynamic allocation optimization model of highway pavement maintenance funds was established, and the corresponding genetic algorithm was designed. Finally, an example was given to simulate the optimized model. The results show that the Markov decision process can dynamically allocate highway pavement maintenance funds, …
Influence Factors Of Deicing And Thaw Performance Of Asphalt Mixture With Low Freezing Point,
2023
Sichuan Highway Planning, Survey, Design, and Research Institute Ltd, Chengdu, Sichuan 611141, China; 2. Research and Development Center of Transport Industry of Technologies, Materials and Equipments of Highway Construction and Maintenance, Chengdu, Sichuan 611130, China; 3. Sichuan Provincial Laboratory of Pavement Structural Materials and Maintenance Engineering, Chengdu, Sichuan 611130, China
Influence Factors Of Deicing And Thaw Performance Of Asphalt Mixture With Low Freezing Point, Zhou Shuiwen, Lin Fang, Zhang Xiaohua, Zhang Lingbo, Jiang Haoqiu
Journal of China & Foreign Highway
The conductivity test was used to study the release law of thawing and deicing components. The freezing test was used to study the cooling law of the mixture, and the thawing rate test was used to study the thawing and deicing performance. The results show that the release of thawing and deicing components of materials with a low freezing point is temperature-dependent, and the release at the high temperature is 3.49–3.77 times that at the low temperature. The granular materials tend to dissolve in water, which results in the release rate of thawing and deicing components faster than that of …
Experimental Analysis On Recycling And Mechanical Properties Of Waste Cement,
2023
Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Experimental Analysis On Recycling And Mechanical Properties Of Waste Cement, Chen Liang
Journal of China & Foreign Highway
In order to recycle waste cement, construction waste cement materials were collected in the laboratory, and they were crushed, ground, and heat treated to facilitate reuse. Then, the waste cement was combined with the commonly used active fly ash admixture to prepare a new cement material for test analysis. The results show that the new cement material produced by industrial by-product, fly ash and waste cement material is feasible. A small amount of construction waste cement material (about 5%) can increase the 28-day compressive strength of cement by more than 50%, and the compressive strength of the prepared building material …
Experimental Study On Characteristics And Stability Of Different Aged Steel Slag Aggregate,
2023
Guangxi Transportation Science and Technology Group Co., Ltd., Nanning, Guangxi 530007, China; 2. Changsha University of Science & Technology, Changsha, Hunan 410114, China
Experimental Study On Characteristics And Stability Of Different Aged Steel Slag Aggregate, Zhang Hongri, Wang Guiyao, Feng Jian, Lan Tianzhu, Wu Tao
Journal of China & Foreign Highway
Steel slag aggregate has good building material properties, but the utilization rate of steel slag in road engineering is low at present. In this paper, the chemical composition, basic physical and mechanical indexes, f⁃CaO, f⁃MgO, pulverization rate, CRB expansion rate, and other indexes of open-air aged steel slag aggregate in Fangchenggang, Guangxi Province for 0, 6, and 12 months were studied. The results show that the physical and mechanical properties of steel slag aggregate basically meet the requirements of road base materials and subgrade fillers, but the indexes of f⁃CaO, pulverization rate, and CRB expansion rate of steel slag aggregate …
Study On Effect Of Fiber Stabilizers On Water Temperature Cycle Damage Resistance Of Drainage Asphalt Mixtures,
2023
Nanchang Institute of Technology, Nanchang, Jiangxi 330099, China; 2. Tianquan County Transportation Bureau, Ya’an, Sichuan 625500, China
Study On Effect Of Fiber Stabilizers On Water Temperature Cycle Damage Resistance Of Drainage Asphalt Mixtures, Liu Fuming, Wu Di, He Qingde, Yang Zhiping
Journal of China & Foreign Highway
In order to study the effect of fiber stabilizer on the water temperature cycle damage resistance of drainage asphalt mixture, drainage asphalt mixture without fiber stabilizer and with wood fiber, polyester fiber, and basalt fiber, respectively, were compared through tests. By standard dispersion test and immersed dispersion test, the anti-spalling ability of the mixture was analyzed. Under the same asphalt condition, the standard dispersion loss of the drainage asphalt mixture was reduced to different degrees after adding fiber stabilizer, which could increase the anti-spalling property of the drainage asphalt mixture to some extent. The splitting, indirect tensile, and rutting tests …
The Intersection Of Utility Coordination And Sue,
2023
InfraMap
The Intersection Of Utility Coordination And Sue, Natalie Parks, Ken Kerr
Purdue Road School
ASCE recently released two new SUE standards—ASCE 38-22 is the updated SUE standard commonly used during the utility coordination process during design, and ASCE 75-22 is the new utility as-built standard that is essential for the accurate location of newly relocated facilities in construction. This presentation will illustrate the interaction and relationship between SUE and utility coordination to enhance project deliverables and reduce risk during construction.
South Bend Airport Tw B Realignment And Apron Project,
2023
Mead & Hunt
South Bend Airport Tw B Realignment And Apron Project, Lisa Kinsman, Patrick Mac Carthaigh, Jeff Thoman, Ashley Thorsen
Purdue Road School
South Bend Airport is in the process of a major reconstruction project to realign Taxiway B to provide a Runway Incursion Mitigation (RIM), separate Taxiway B from the Terminal Apron, and make adjustments to the terminal apron to correct drainage. This presentation will provide a full review of the project.
Additive Manufacturing Of Engineered Cementitious Composites With Ultra-High Tensile Ductility,
2023
University of New Mexico
Additive Manufacturing Of Engineered Cementitious Composites With Ultra-High Tensile Ductility, Amir Bakhshi
Civil Engineering ETDs
One of the critical factors in the development of additive manufacturing in the construction industry is designing suitable materials for 3D printing applications. 3D concrete printing (3DCP) has gained significant attention due to the abundance and availability of concrete. However, concrete is a brittle material and, without proper reinforcement, cannot meet the requirements for structural purposes. Engineered Cementitious Composites (ECC), known for high ductility, and strain-hardening with low fiber contents, can potentially eliminate the need for steel reinforcement in 3D printing without any need for manual placement of reinforcement. A set of systematic tests on ECC mix designs' fresh and …
Planning For Pedestrians And Bicyclists During Construction Projects,
2023
Texas A&M Transportation institute
Planning For Pedestrians And Bicyclists During Construction Projects, John Habermann, P.E.
Purdue Road School
This session will explore how the Texas Department of Transportation Waco District addressed pedestrian/bicyclist safety and mobility during a multi-year construction project along I-35. This presentation will demonstrate the value of online tools, field implementations, and data collection. Attendees will learn the value of assembling a stakeholder steering committee; counting pedestrian and bicyclists before, during, and after construction; effectively using pavement clings; and using a webpage dedicated to pedestrian/bicyclist updates.
