Experimental Study On Recycled Brick Powder Foam Concrete Based On Slurry Substitution Method,
2023
School of Civil Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China
Experimental Study On Recycled Brick Powder Foam Concrete Based On Slurry Substitution Method, Liao Shixian, Huang Lei
Journal of China & Foreign Highway
Foam concrete is a kind of porous lightweight building material characterized by sound insulation and noise reduction, heat insulation and fire resistance, heat preservation and frost resistance. However, it has defects such as low strength, high porosity and poor integrity, thus limiting its wide application in the field of building materials. Recycled brick powder can be prepared from construction waste of clay bricks and has certain volcanic ash activity. Meanwhile, the mechanical properties of foam concrete can be improved by employing waste bricks as an admixture in cement-based composite materials. In view of the problems of the cement substitution method, …
Study On Mix Design And Performance Of Permeable Concrete Considering Sand Ratio And Aggregate To Binder Ratio,
2023
Henan Puwei Expressway Co., Ltd., Puyang, Henan 457000, China
Study On Mix Design And Performance Of Permeable Concrete Considering Sand Ratio And Aggregate To Binder Ratio, Wei Yazhou, Ji Rongqing
Journal of China & Foreign Highway
Considering the effect of the sand ratio and aggregate to binder ratio, this paper improved the traditional mix ratio design method-volumetric method, and investigated the influence of the sand ratio, aggregate to binder ratio, and maintenance method on the mechanical properties and permeability coefficient of pervious concrete based on the improved method. The results show that under the sand ratio of 15%, the compressive strength of concrete is significantly increased and the permeability is not affected. When the aggregate to binder ratio is 3.0‒3.1, the compressive strength and permeability coefficient of the concrete can be both considered. Additionally, compared to …
Application Of Dry Sbs Modification Technology In Yanhai Highway,
2023
Jiangsu Eastern Expressway Management Co., Ltd., Yancheng, Jiangsu 224000, China
Application Of Dry Sbs Modification Technology In Yanhai Highway, Zhang Han, Meng Chunlin, Zhao Mingfang, Lu Chuanzhong, Ji Guoqi
Journal of China & Foreign Highway
Dry SBS-modified asphalt pavement technology is to produce SBS-modified asphalt mixtures by adding specific SBS modifiers, which aims to solve the performance degradation of SBS-modified asphalt in transportation and storage. By relying on the coastal highway repair projects, this paper compared the effects of different dry SBS mixing contents on the test results by the indoor dry SBS and matrix asphalt compatibility test and asphalt mixture performance evaluation test. Meanwhile, based on the test results, the recommended dry SBS mixing content for the coastal highway upper layer milling and resurfacing maintenance project was proposed and applied on a large scale …
Experimental Study On Mechanical Properties Of Steel-Polypropylene Mixed Fiber Rubber Concrete,
2023
Shanxi Transportation Survey & Design Institute Co., Ltd., Taiyuan, Shanxi 030031, China
Experimental Study On Mechanical Properties Of Steel-Polypropylene Mixed Fiber Rubber Concrete, Qiu Jiandong
Journal of China & Foreign Highway
Waste rubber materials can be recycled to obtain rubber aggregates, which can be employed in cement concrete products. This paper carried out mechanical performance tests on ordinary concrete and rubber concrete (rubber substitution rate of 20%) with different fiber combinations (doped MS, co-doped PP, and mixed MS-PP), and mainly examined the slump, density, compressive strength, modulus of elasticity, split tensile strength, and rupture strength of the concrete. The results show that the relevant performance indexes decrease significantly after 20% of rubber aggregate is added to the concrete. However, the mechanical performance of ordinary concrete and rubber concrete with the combination …
Analysis Of Light Reflection And Automobile Exhaust Degradation Effect Of Asphalt Pavement Coating,
2023
Yan'an Highway Administration Bureau, Yan'an, Shaanxi 716000, China
Analysis Of Light Reflection And Automobile Exhaust Degradation Effect Of Asphalt Pavement Coating, Shang Wenyong, Zhou Zheng, Chen Jun
Journal of China & Foreign Highway
To compare the light reflection and exhaust degradation effect of common road coating fillers, this paper prepared three kinds of road surface coatings with Nano-TiO2, Nano-ZnO, and Micro-TiO2 as fillers respectively. Meanwhile, the reflectivity tests of the coatings with different mixing contents of fillers were conducted by adopting a self-developed light reflectivity tester to determine the optimal mixing content of fillers. Under the optimal mixing content of fillers, the reflectivity of three kinds of coating asphalt mixtures was tested to compare the light reflectivity effect of Nano-TiO2, Nano-ZnO and Micro-TiO2. Additionally, a self-developed exhaust concentration analyzer was utilized to test …
Study On Effect Of Nanomodified Additives On Properties Of Concrete Mixtures During Winter Season,
2023
Guangxi Road Construction Engineering Group Co., Ltd., Nanjing, Guangxi 530001, China
Study On Effect Of Nanomodified Additives On Properties Of Concrete Mixtures During Winter Season, Li Yulin, Liang Hongjie, Liang Junlin, Rong Hongliu, Yang Xiaolong
Journal of China & Foreign Highway
To solve the difficult placement of small structures on highways caused by the decreasing workability of cement concrete construction in winter seasons, this paper developed a nanomodified additive to investigate its effect on the performance of cement concrete. Sulfonate naphthaleneformaldehyde (SNF), nanoSiO2, rosin soap (WSR) and sodium nitrate (NaNO3) were formulated into a variety of additives in different ratios and mixing contents to prepare cement concrete, with the fluidity, segregation and compressive strength studied. The results show that the optimal ratio (mass) of nanomodified additives is SNF:0.4%, nanoSiO2:0.1%, WSR:0.05%, and NaNO3:4.0%. The fluidity, segregation and compressive strength of the concrete …
Comparison Of Specifications For Highway Safety Audi Ts Of China ， The United States ， And Australia,
2023
College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China
Comparison Of Specifications For Highway Safety Audi Ts Of China ， The United States ， And Australia, Li Jie, Han Huanhuan, Li Jia, Ren Yabo, Gong Ruiming
Journal of China & Foreign Highway
Traffic safety is one of the three major problems of transportation. To build a transportation power, China has proposed the call of “facilitating the transportation development from pursuing the speed and scale to paying more attention to quality and safety”, and improving the audit specifications of road safety is an important basis for increasing the transportation safety level. This paper firstly introduced the background where China, the United States and Australia issued the audit specifications of road safety, and then compared the differences between the three countries in the aspects of the audit process for road safety, audit indexes and …
Application Of Bim Forward Design In Complex Three-Dimensional Traffic Design Stage,
2023
CCCC First Highway Consultants Co., Ltd., Xi'an, Shaanxi 710075, China
Application Of Bim Forward Design In Complex Three-Dimensional Traffic Design Stage, Wang Bo, Zhu Xinghu, Pei Wangjian, Ge Puta
Journal of China & Foreign Highway
To improve the accuracy and efficiency of complex three-dimensional traffic design, and provide basic digital data for the whole life cycle, this paper researched and investigated the application of BIM technology in the complex three-dimensional traffic design stage by taking the convergence project of the Qianhai section of Shenzhen Coastal Expressway and Nanping Expressway in Guangdong as a case study. Meanwhile, it put forward the BIM forward design schemes for the fields of roads, bridges, and tunnels, carried out secondary development, and built the three-dimensional parametric model, with the design results optimized. Additionally, design analysis and application were conducted to …
Research On Interchange Reconstruction Design Of Minxiao Hub,
2023
CCCC Second Highway Consultants Co., Ltd., Wuhan, Hubei 430056, China
Research On Interchange Reconstruction Design Of Minxiao Hub, Hu Tian, Tan Ximing, Yi Xuebin, Wei Hui
Journal of China & Foreign Highway
Based on the design of the Minxiao hub interchange, this paper analyzed the technical problems of frequent traffic accidents after the initial reconstruction of Minxiao hub interchange, and put forward corresponding reconstruction suggestions. In the interchange design details, the design points about the dual lanes adopting single lanes and speed change lanes only put forward the distance requirement of 60 m for the transition sections, but whether the gradual changes of the travel lanes and hard shoulders are completed in the same road section or not is not clarified. The initial reconstruction of Minxiao hub interchange is designed to complete …
Research On A Hub Interchange Scheme Under Special Terrain Conditions,
2023
Sichuan Communication Surveying & Design Institute Co., Ltd., Chengdu, Sichuan 610000, China
Research On A Hub Interchange Scheme Under Special Terrain Conditions, Wang Jie, He Yajun
Journal of China & Foreign Highway
By combining the study process and conclusion of the interchange scheme of the Lugao hub as an important node of G4216 Jinyang-Ningnan Expressway Project, this paper discussed the ideas and methods of selecting the hub interchange shape under complex terrains and high functional requirements. It aimed to provide certain references for the design of hub interchange schemes in special Y-shaped terrain conditions. The Lugao hub interchange location is deeply cut by the Jinsha River and its branches, with narrow valley bottoms, extremely steep cross slopes, and harsh engineering construction conditions. Meanwhile, in the limited space, the specific requirements of the …
Energy Dissipation Optimization For Circular Culverts,
2023
University of Nebraska - Lincoln
Energy Dissipation Optimization For Circular Culverts, David M. Admiraal, Chi Zhang
Nebraska Department of Transportation: Research Reports
Two types of energy dissipation devices at circular culvert outlets were investigated: full-length weirs and staggered weirs. Related literature was reviewed; a model broken-back circular culvert and dissipation basin was built; instrumentation was installed to measure discharge, piezometric head, and velocities; and four sizes of full-length and staggered weirs were tested over a range of discharges and tailwaters. Weir heights ranged from D/8 to 4D/8, in which D was the culvert diameter. The two weir types were subjected to two styles of tests: (1) tests unaffected by tailwater and (2) tailwater-influenced tests. For tall full-length weirs (3D/8 and 4D/8), basin …
Evaluation Of Durable Pavement Striping,
2023
University of Kentucky
Evaluation Of Durable Pavement Striping, William Staats, Erin Lammers-Staats
Kentucky Transportation Center Research Report
Roadway pavement markings, colloquially referred to as “striping”, can be made of various combinations of paint and reflective beads. In the interest of aligning Kentucky with the state-of-the-art durable pavement marking practices of other states, the Kentucky Transportation Cabinet (KYTC) developed a research study aimed at improving pavement marking specifications and practices. This study reviewed current practices, identified potential improvements, and performed a systematic evaluation in a controlled environment on both asphalt and concrete roads. The state evaluated high-build waterborne paint, extruded and spray thermoplastic, polyurea, and preformed plastic tape, as well as several bead packages including M247, Missouri blend, …
Kentucky Traffic Collision Facts 2022 Report,
2023
University of Kentucky
Kentucky Traffic Collision Facts 2022 Report, Paul Ross, Eric Green, Christopher Blackden, Kenneth R. Agent, Christopher Van Dyke
Kentucky Transportation Center Research Report
Kentucky’s Traffic Collision Facts is based on collision reports submitted to the Kentucky State Police Records Branch. As required by Kentucky Revised Statute 189.635: “Every law enforcement agency whose officers investigate a vehicle accident of which a report must be made...shall file a report of the accident...within ten days after investigation of the accident upon forms supplied by the bureau.” The stated purpose of this requirement is to utilize data on traffic collisions to improve the Commonwealth’s traffic safety program. Unless otherwise noted, data in this publication are for public roads only. Data contained in this report are based solely …
Inspection Training Course On Bridge Preventive Maintenance Activities,
2023
University of Kentucky
Inspection Training Course On Bridge Preventive Maintenance Activities, Danny Wells, Sudhir Palle
Kentucky Transportation Center Research Report
Despite over 30 percent of bridges in the United States having exceeded their 50-year design lives, most state departments of transportation (DOTs) lack the funding needed to replace bridges on a large scale. In response, agencies have increasingly turned to bridge preventive maintenance activities to prolong bridge service lives. These activities provide a safe and cost-effective way to slow the rate at which structures deteriorate, mitigate the effects of aging, and improve bridge functional condition. The Kentucky Transportation Cabinet (KYTC) has become increasingly reliant on preventive maintenance to preserve and extend the service lives of its steel and concrete bridges. …
Sensitivity Analysis Of The Ideal Ct Test Using The Distinct Element Method,
2023
California State University, Long Beach
Sensitivity Analysis Of The Ideal Ct Test Using The Distinct Element Method, Shadi Saadeh, Maria El Asmar
Mineta Transportation Institute
Cracking is a primary mode of failure for asphalt concrete (AC), resulting in road damage and deterioration, and leading to an increase in road hazards and fatalities. Studying the fracture behavior of AC is an effective way to learn how to best enhance their cracking resistance. To do this, the indirect tensile cracking laboratory test (IDEAL-CT) was developed and used to assess the AC cracking behavior by defining a unique index that allows the ranking of different mixes’ cracking resistance. The sensitivity of the test results to the test parameters is needed to monitor the test’s performance. Several parameters impact …
2023 Safety Belt Usage Survey In Kentucky,
2023
University of Kentucky
2023 Safety Belt Usage Survey In Kentucky, Erin Lammers-Staats, Derek S. Young, Kenneth R. Agent, Aidan Elias
Kentucky Transportation Center Research Report
Data and results of a statewide observational survey used to establish the statewide usage rate for safety belts in Kentucky.
Analysis Of Traffic Crash Data In Kentucky 2018-2022,
2023
University of Kentucky
Analysis Of Traffic Crash Data In Kentucky 2018-2022, Paul Ross, Eric Green, Christopher Blackden, Christopher Van Dyke
Kentucky Transportation Center Research Report
This report documents analysis of traffic crash data in Kentucky. A primary objective of this study was to determine average crash statistics for Kentucky highways. Where used, rates were calculated for various highway types and for counties and cities. Difference criteria were used for exposure. Average and critical numbers, SPFs, and crash rates were calculated for various highway types in rural and urban areas. These metrics rely on crashes identified on highways where Annual Average Daily Traffic (AADT) volumes were available. Data in this report may be used to help identify problem areas. The other primary objective of this study …
Integrated Land Use And Transportation Modeling Considering The Impact Of Autonomous Vehicles,
2023
New Jersey Institute of Technology
Integrated Land Use And Transportation Modeling Considering The Impact Of Autonomous Vehicles, Roksana Asadi
Dissertations
The advent of autonomous urban mobility is expected to effect changes in land use patterns and urban development. A new framework for integrated land use and transportation system models that incorporate Autonomous Vehicles (AVs) and Shared Autonomous Vehicles (SAVs) will be needed to investigate the development of transportation and land use plans and policies. This study aims to analyze the impacts of AVs and SAVs on land use changes by defming scenarios that consider different shares of these emerging transportation modes. Also, this study explores the corollary effects of various land use factors by applying them to a case study …
Bim And Digital Twins In Infrastructure Projects: An Overview From The Transportation Professional's Perspective,
2023
Louisiana State University
Bim And Digital Twins In Infrastructure Projects: An Overview From The Transportation Professional's Perspective, Natállia Mendes
LSU Master's Theses
Transport infrastructure has undergone significant changes in recent years due to the digitalization of construction methods. Consequently, there is an increasing demand for more productive and cost-effective technologies to optimize various aspects such as time, cost, changes, waste, and errors in projects. Notably, technologies such as Building Information Modeling (BIM) and Digital Twin (DT) hold the potential to enhance the performance of infrastructure projects. While BIM has received substantial attention in recent years, Digital Twin is relatively new to the construction industry. This leads to a scarcity of studies on DT and its integration with other emerging technologies like BIM. …
Deep Learning Techniques For Efficient Evaluation Of Asphalt Pavement Condition,
2023
Public Works Department, Faculty of Engineering; Ain Shams University; Cairo; Egypt
Deep Learning Techniques For Efficient Evaluation Of Asphalt Pavement Condition, Kamel Mahdy, Ahmed Zekry, Mohamed Moussa, Ahmed Mohamed, Hassan Mahdy, Mohamed Elhabiby
Mansoura Engineering Journal
For the last few decades, researchers have been devising a simple and cost-effective method to evaluate pavement distresses to give decision-makers adequate feedbacks about the pavement condition of a certain road. Fortunately, with the evolution and progression of computer vision tools and techniques, good results had been achieved regarding the detection, classification, and quantification of road distress. In this paper, a new efficient process of road distress analysis using deep learning models is introduced. This new process was tested on a collected road dataset to evaluate the efficiency and speed of this low-cost road maintenance system. Promising results were obtained …
