Construction Engineering and Management Commons^™

Behavior Analysis Of Cement Concrete With Combination Of Waste Rubber And Glass, Abdulaziz Alebra

Symposium of Student Scholars

Glass and Rubber waste materials are valuable materials to use rather than throw which we have more than enough to use and recycle. Recycled glass and rubber materials can reduce and help major climate issues in our times based on the statistics reducing glass can bring down air pollution by 20% and also reduce water pollution by 50% as well as can reduce the use of landfill space. A laboratory study will be launched, and tests will be conducted following the ASTM standards, ASTM C143 for a concrete slump, and ASTM C31 for making and curing concrete specimens. Samples of …

Behavior Analysis Of Cement Concrete With Combination Of Waste Plastic And Glass, Mohamad Alamayreh

Symposium of Student Scholars

The waste stream in our society contains abundant plastic and glass waste, which can be effectively recycled to reduce the waste volume and save landfill space. Several studies have demonstrated that recycling glass can lower air pollution by 20% and water pollution by 50%, while recycling waste plastic can help reduce greenhouse gas emissions and save energy. To explore the potential use of recycled plastic and glass in concrete mixes, a laboratory investigation was conducted. Different percentages of plastic and glass waste will be tested as fine aggregates in cement concrete mixtures to evaluate their performance in terms of resistivity …

Feasibility Study For A Continuous Mansfield Hollow State Park Multi-Use Path, Owen P. Spangler

Honors Scholar Theses

This report aims to design a pedestrian river crossing that connects the north and south ends of Mansfield Hollow State Park, utilizing both a new paved pathway and bridge construction. This report first uses GIS data to complete a feasibility study on pathway routing and cost. A preliminary route was selected based on grading and cost analysis. The requirements for constructing a multi-use pathway in the State of Connecticut were then explored, attempting to find a best-fit pathway alignment to accomplish that goal. Through a lengthy literature review, it was found that the pathway design would have to deviate from …

Numerical Investigations Of Gfrc Beams Strengthened In Shear With Innovative Techniques, Marwa H. Bondok, Gamal I. Khaleel, Ahmed S. Debaiky, Mohamed H. Makhlouf

Mansoura Engineering Journal

This paper discusses the Finite Element analysis (FE) conducted to predict the behavior of Glass Fiber Reinforced Concrete (GFRC) beams without shear reinforcement (stirrups) and strengthen them with proposed techniques to increase their shear strength. for this study, A total of eighteen (18) (120 * 300 * 2200 mm) specimens were modeled using Ansys™ mechanical. The main variables were the percentage of discrete glass fiber in the concrete (0.0, 0.6, and 1.2%), the type of main reinforcing bars (steel or GFRP), the shear strengthening material (GFRP or steel) links, the strengthening systems (side near-surface mounted (SNSM) bars, externally bonded (EB) …

System Dynamics And Topsis Models For Sustainable Building Materials Selection Considering Life Cycle Assessment, Shimaa Elshoubaky, Emad Elbeltagi, Mohammed Abd Elrahman, Islam Elmasoudi

Mansoura Engineering Journal

Construction industry is the most contributor to the environmental impacts. Achieving sustainability in construction is complicated, but one of the most optimal strategies is selecting sustainable building materials.

The major goal of this study is to present a new idea for choosing sustainable building materials (SBMs) by simulating sustainability parameters' behaviour. This research proposes a System Dynamics (SD) model along with the TOPSIS method based on the dynamic interactions among a number of sustainable criteria to help decision makers in sustainable building materials selection. The sustainable criteria that form system boundary are determined from previous studies and experts′ opinions. The …

Considerable Factors In Determining The Sustainability Benefits Of The Demolition Of An Existing Structure For A New Build And Of The Renovation Of An Existing Structure, Dev Boyd Hippenstiel

Construction Management

The decision between whether to demolish or renovate a building comes down to which one will satisfy the owner’s needs and objectives while remaining within budget. This project will identify factors in determining sustainability benefits between a completely new construction project that demolishes the existing structure prior to rebuilding and a renovation project that reuses some or all of the existing structure. Research on construction data, interviews conducted with leading industry members, and journals that reported on both these strategies are presented. This project will examine considerations that reduce the demolition’s negative impact on the environment and improve the overall …

Designing Safety Vests To Fit Women, Claire Peters

Construction Management

This paper focuses on the design and construction of safety vests for women, particularly in XS and XXL sizes. Safety vests are an essential piece of protective equipment worn by individuals working in environments requiring high visibility for safety reasons. The American National Standards Institute (ANSI) and the International Safety Equipment Association (ISEA) develop safety vest standards to ensure 360-degree visibility of workers, but these standards create limitations in manufacturer’s abilities to create a well-fitted vest for women of smaller stature, particularly in the sizes between XXS and S, as the required square inches of material result in a baggy …

Housing In Kibera's Soweto East Informal Settlement, Kenya: A Socio-Technical Evaluation, Tiernan Brennan

Masters

In 2003, the Kenya Slum Upgrading Programme (KENSUP) was launched in partnership with UN-Habitat and the Government of Kenya (GoK) to improve the livelihoods of people in Kenya by 2020 through the provision of improved shelter, infrastructure, land tenure and income generation. Kibera is an informal settlement in Kenya where varying housing typologies and traditional vernacular-style designs coexist with modern housing units. Soweto East was one of eighteen villages located in Kibera selected for KENSUP’s first major housing development initiative. Soweto East was selected from a screening of several housing projects that could be subjected to a socio-technical (STE). The …

Analysis On Influence Factors Of Swelling Deformation Of Gravel Pile In Soft Soil Area Based On Orthogonal Numerical Test, Fan Liujun, Lu Xiaoming, Miao Peng

Journal of China & Foreign Highway

The gravel pile composite foundation is usually accompanied by swelling deformation when vertical settlement deformation occurs. The research on the swelling deformation characteristics and influencing factors of gravel pile composite foundations is of great importance for analyzing the settlement rule and deformation mechanism of gravel pile composite foundations. Based on an orthogonal numerical test, this paper used the finite element software Midas GTS to analyze the main influencing factors of the swelling deformation of the gravel pile and used range and variance analysis to analyze the sensitivity and significance of each influencing factor. Finally, through regression analysis, the optimized swelling …

Study On Ultimate Bearing Capacity Characteristics Of Overlying Shell Foundation, Bian Guirong, Li Fuyou, Qian Xiaotong, Xie Ke

Journal of China & Foreign Highway

For the calculation of the ultimate bearing capacity of the overlying hard crust foundation, based on the theory of Meerhoff and Hanna’s impact and shear failure, the sealing effect and stress diffusion effect of the overlying hard crust foundation were considered, and the formula for calculating the ultimate bearing capacity of the overlying hard crust double-layer foundation was derived and verified by an actual engineering example. The maximum error between the measured value and the calculated value of Hansen’s weighted average method, diffusion angle method, and Meerhoff and Hanna’s method was 74.2%, 31.5%, and 15.2% respectively, while the error was …

Analysis On Pavement Early Damage Characteristics And Influence Factors Of Baiyin Section Of National Highway 109, Shi Fuzhou, Han Fei, Tang Dandan, Liu Wuwen, Zhang Jinyuan

Journal of China & Foreign Highway

In order to explore the cause of early damage of highway asphalt pavement in Baiyin area of Gansu Province, this paper analyzed the main factors that affected the performance of asphalt pavement and investigated the use of asphalt pavement in this area, climate environment, and traffic conditions. By taking Baiyin section of National Highway 109 as an example, the specific data were deeply analyzed. Based on the investigation of pavement use, the situation and decay rule of local asphalt pavement were summarized. According to the investigation of the climate environment, the influence of solar radiation, temperature difference, and other conditions …

Test And Finite Element Analysis On Flexural Properties Of Steel Plate‒Uhpc Composite Beam, Huang Yun, Zhao Hua, Tu Lei

Journal of China & Foreign Highway

In order to study the flexural properties of steel plate-ultra-high performance concrete (UHPC) composite beams, the static test of the flexural properties of a steel sheet-UHPC composite beam was first carried out. Then, Abaqus finite element software was used to simulate the whole process of static loading of the specimen, and different ways were used to simulate the studs in the composite beam. The most appropriate model was thus selected. Finally, based on the calibrated finite element model, the parameters of the steel plate-UHPC composite beam were analyzed, the main parameters included: UHPC compressive strength, steel plate strength, and stud …

The Calculation Theory Of Humidity For Subgrade ：A Perspective Review

Journal of China & Foreign Highway

Subgrade humidity has a significant impact on its stiffness, deformation, and other properties. The theoretical calculation method of humidity field has always been one of the key issues in road engineering as a research method to evaluate its evolution law and mechanism. This paper reviewed and summarized the control equation of subgrade humidity calculation, hydraulic characteristics of unsaturated subgrade soil, and influencing factors of humidity. It was found that there were few studies on the coupling effects of multiple fields and factors such as stress, seepage, vegetation, and atmosphere in the whole calculation method system. It is suggested to carry …

Field Experiment On Deep Response Of Slope Subjected To Different Rainfalls In Plateau Mountainous Area Of Northwest Yunnan, Chen He, Lu Zhiqiang, Li Guo, Chen Zhengyu

Journal of China & Foreign Highway

In order to investigate the characteristics and mechanism of deep response of slopes subjected to different rainfalls in plateau mountainous area of Northwest Yunnan, remote real-time monitoring devices were deployed to carry out slope prototype field tests, analyze the effects of natural rainfalls in different forms and intensities on deep displacement and groundwater level changes, and put forward suggestions for landslide monitoring and early warning. The results show that the characteristics of heavy rainfall, steep slope, and rock fragmentation during flood season can induce the frequent fluctuation of groundwater level in the deeper part of the slope, which results in …

Experimental Study On Shear Strength Of Ehp Piles, Wang Nanjiang, Liu Jianlong, Qiu Chengchun, Zhang Yuting, Tao Xiaoyu

Journal of China & Foreign Highway

The new environmental homogeneous plastic (EHP) pile improves the construction technology of traditional soil-cement mixing piles. It mixes the soil-cement slurry evenly in advance and then pours it into holes, so as to form piles with controllable physical properties. In order to test the strength of EHP piles, direct shear tests were carried out on field core sampling, field stirring sampling, and laboratory sampling, and the effects of pile depth, cement content, age, and curing conditions on shear strength were discussed. The test results show that the shear stress-displacement curve of the in-situ core sample is strain-softening; the shear strength …

Review And Outlook For Long‐Life Asphalt Pavement, Xu Xizhong, Wei Jincheng, Yan Xiangpeng, Zhang Zhengchao

Journal of China & Foreign Highway

In order to make clear the research status of long-life asphalt pavement in China and abroad, this paper summarized the development characteristics, pavement structure, design index, pavement material, dynamic response analysis of pavement, fatigue performance estimation, and other hot issues of long-life asphalt pavement, compared the structural characteristics of long-life asphalt pavement in various countries, and summarized the results of pavement material design and optimization. The research progress of the dynamic response of asphalt pavement was summarized, and the development direction of long-life asphalt pavement was discussed. The comprehensive analysis shows that long-life asphalt pavement is the development trend of …

Application Of Digital Image Processing In Cracks Of Concrete Pavement, Gao Fan, He Chunguang, Wang Pengzhang, Qin Yanping, Duo Huaqiong

Journal of China & Foreign Highway

The image obtained by using the traditional crack detection method of concrete pavement has some problems, such as low contrast and high noise, which makes it difficult to meet the requirements of modern road engineering management or non-destructive testing. In order to eliminate the interference in crack images, digital image processing technology was used to improve the image quality through computers. This paper took digital image processing as the core and introduced its development and application in pavement cracks. Based on the research progress and achievements of digital image processing on pavement cracks in recent years, the principles and characteristics …

Study On Modulus Characteristics Of Semi‐Flexible Pavement, Cai Yubin, Gong Minghui, Xiong Zijia, Deng Cheng, Peng Gang, Zhang Lihua, Hong Jinxiang

Journal of China & Foreign Highway

Semi-flexible pavement has the advantages of good bearing capacity and strong shear deformation resistance and is an effective means to solve the rutting disease of intersections, bus stops, and other sections. However, due to the difference in mechanical properties, semi-flexible pavement can not completely refer to the design method of cement concrete pavement or asphalt concrete pavement, and one of the important tasks of establishing a design system suitable for semi-flexible pavement is to analyze the material modulus characteristics of pavement. In this paper, the dynamic modulus, indirect tensile stiffness modulus, and rebound modulus of laboratory forming and coring specimens …

Analysis And Evaluation Of Application Effect Of Hot Mix Plan Regeneration Technology In Asphalt Pavement, Yang Yanhai, Cui Hong, Yang Ye, Qian Baitong

Journal of China & Foreign Highway

In order to evaluate the practical application effect of plant-mixing hot regeneration technology, this paper, based on the actual project of plant-mixing hot regeneration technology in Liaoning Province, analyzed the use status, technical performance, and construction technology of pavement materials made by plant-mixing hot regeneration technology via measuring the volume index, asphalt content, grading composition, and strength of pavement core samples. The results show that the strength characteristics, high temperature stability, and low temperature crack resistance of the pavement materials made by plant-mixing hot regeneration technology can meet the normal use requirements of asphalt pavement under moderate traffic volume. The …

Research On Bridge Technical Condition Evaluation System Based On Bim, Xia Zili, Jing Qiang, Gao Wenbo, Huang Liguan, Wu Xiaodong

Journal of China & Foreign Highway

There are some practical difficulties in bridge technical condition assessment, such as low visualization degree, strong subjectivity of assessment, low efficiency of disease location, and poor continuity of assessment data. In view of the requirements of bridge technical condition assessment and the above-mentioned problems, this paper reviewed the standard system of bridge technical condition assessment in China and the application of BIM in bridge operation and maintenance, analyzed the modelling points and assessment business processes of bridge BIM model, and designed the overall framework and business module functions of the BIM-based technical condition assessment system. The bridge technical condition assessment …