Construction Engineering and Management Commons^™

Commercial Construction Recruitment Preferences, Simon Ingram

Construction Management

Students pursuing an undergraduate degree in Construction Management at California Polytechnic State University (Cal Poly), San Luis Obispo are provided with a wide array of opportunities for both social and professional activities. Often students are aware of the sector of the construction industry they would like to pursue after their degree is obtained but are unsure of what experiences or skills make them competitive recruiting candidates. This research focuses specifically on Commercial Construction companies to provide sector specific recruitment preference data. The purpose of the research is to provide students pursuing a full-time position in commercial construction with a roadmap …

Construction Of Concrete Shear Wall & Modular Foundations - Procurement And Quality Control, Justin J. Coffin

Construction Management

This project details the planning, construction, quality control, and logistics processes throughout the construction of a concrete shear wall and modular footings. The project focused on constructing the wall and footings as they were designed to ensure they meet strength parameters to be used in the High Bay Lab at California Polytechnic State University in San Luis Obispo for seismic testing. The complex designs, encompassing dense rebar gages and post tensioned bars, required extensive hours of labor and quality control. This paper will cover the main phases of the construction process and how they were acquired. Furthermore, the considerations taken …

Resources To Support Adu Construction, Eleanor Rheingans

Construction Management

This survey examines whether cities with a higher number of online resources will result in a higher proportion of ADU permits and a lower wait time for approval. Some cities have offered online resources directly related to the ADU permitting and construction process. The seven online resources were selected based on interviews with developers. Data used is from 2018 to 2023. Other factors seem to affect the number of permits issued more than resources the cities post for public access. While developers do want the resources cities are currently offering, there are some gaps, particularly records of past permit costs …

Construction Of Lightly Reinforced Concrete Shear Wall And Footings, Luke Jackson Method

Construction Management

This paper details the construction of two cast in place foundations as well as a lightly reinforced cast in place wall. The project, located inside the high bay, provides the Architectural Engineering (ARCE) department with an opportunity to test Fiber Reinforced Polymer wrap as a retrofitting option for walls dating back to pre-1980s. Due to site conditions, and project design, this project required extensive planning and communication within our team, faculty advisors, and shop technicians. This paper will discuss the phasing of construction and procurement of material that was required for the completion of this project. It also aims to …

Planning And Executing The 2024 Annual Hackathon, Isabella Naomi Peterson

Construction Management

The Hackathon is an event that is put on every year by Cal Poly construction management students which highlights a prevalent safety issue in the construction industry. This is a one day event which focuses on re-designing, innovating, and improving an aspect on job sites that needs modification. The theme this year for the third annual Hackathon was redesigning the safety hard hat and helmet. This paper will explain how the Hackathon project came about this year, why the safety issue of hard hats was selected, the research conducted for this year’s Hackathon, steps of event planning, the execution of …

Exploring The Impact Of Personal Protective Equipment (Ppe) Quality On Construction Individuals, Daniel Seo

Construction Management

Personal Protective Equipment (PPE) is essential in protecting workers on construction sites. Construction sites are known to have various hazards that can lead to death or injury. While PPEs are designed to protect workers from these injuries, its usage and quality affects its capability. As PPE is distributed by construction companies, it is imperative to identify the determinants of quality PPE. These factors include psychological factors like perceived risk, comfort, and safety attitudes. Two surveys were conducted on seventeen (17) construction management industry individuals and twenty-one (21) construction management students to determine the preferences of PPE and their views regarding …

Forecasting Future Research Trends In The Construction Engineering And Management Domain Using Machine Learning And Social Network Analysis, Gasser G. Ali, Islam H. El-Adaway, Muaz O. Ahmed, Radwa Eissa, Mohamad Abdul Nabi, Tamima Elbashbishy, Ramy Khalef

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Construction Engineering and Management (CEM) is a broad domain with publications covering interrelated subdisciplines and considered a key source of knowledge sharing. Previous studies used scientometric methods to assess the current impact of CEM publications; however, there is a need to predict future citations of CEM publications to identify the expected high-impact trends in the future and guide new research efforts. To tackle this gap in the literature, the authors conducted a study using Machine Learning (ML) algorithms and Social Network Analysis (SNA) to predict CEM-related citation metrics. Using a dataset of 93,868 publications, the authors trained and tested two …

Sustainable And Cost-Effective Work Zone Scheduling On Two-Lane Highways With Managed Lanes, Ahmed Z. Edrees

Dissertations

Roadway maintenance projects greatly influence the roadway capacity, resulting in potential traffic disturbances captured by delays. Additionally, costs associated with these projects tend to be exorbitantly extensive. Most agencies and planners try to find a solution that minimizes roadway maintenance costs, traffic delays, crash risks, and environmental impact.

Work zones on two-way two-lane roadway typically avoids high-demand periods. Lane-closure scenario is commonly used and converts the open lane into a phantom intersection, alternating two-direction movements on one lane with the help of a flagger or a temporary signal. Alternatively, using shoulders as temporarily managed lanes allows for simultaneous two-way movements …

Pltl Develops Scholars For Majors In The Built-Environment​, Shpat Halili, Calvin O. Walters Jr.

Publications and Research

The National Science Foundation S-STEM program at NYC College of Technology (City Tech), Developing an Ecosystem of STEM success for Built Environment Scholars (Award Number 2150432), focuses on supporting and developing scholars in the majors relating to the Built Environment. The proposed project includes the expansion of Peer-Led Team Learning (PLTL) at City Tech. The PLTL model creates a supportive learning environment and supplements the faculty-centered classroom with student-led and student-oriented workshops. At City Tech, existing workshops provide curricular support in statics and mathematics. The PLTL program benefits promising first-year STEM students, and the S-STEM program utilizes the PLTL model …

Effect Of Waste Covid-19 Masks On Compaction Characteristics Of Silty-Clay Soil, Sydney K. Lawson

Honors College Theses

The present study aims to explore the effect of adding shredded waste Covid-19 masks to silty-clay soil on the soil’s compaction characteristics for beneficial use in embankment, the subgrade of roadways, or backfill. This was accomplished by using two different types of masks: blue surgical masks and KN95 masks. Both mask types were hand shredded into half-inch sections using safety-scissors. The maximum dry density (MDD) and optimum moisture content (OMC) are the two most important compaction characteristics, and they were determined by the Standard Proctor Compaction Test (ASTM D698 / AASHTO T99). The change of both the MDD and OMC …

Quality Assurance And Quality Control For Reinforced Concrete Inspections, Calvin O. Walters Jr.

Publications and Research

Ensuring the safety and longevity of structures is paramount in concrete construction projects. Cases like the Big Dig ceiling collapse, which occurred on July 10, 2006, when a concrete ceiling panel measuring 20' x 40' and debris weighing 26 short tons (52,000 lb) fell within Boston's Fort Point Channel Tunnel, underscore this importance (Wald, M. L., 2007). Quality Assurance (QA) and Quality Control (QC) are crucial in mitigating such risks. QA ensures that materials and methods meet predetermined performance, design, and reliability standards specified in contracts and customer arrangements. On the other hand, QC is a strategic process businesses use …

Mechanical And Deformation Characteristics Of Piles In Coastal Soft Soil Areas Considering Softening Effect, Wang Fei, Yan Yu, Jiao Lidong, Shen Fengqi, Chen Lu, Liu Jianhua

Journal of China & Foreign Highway

In order to discuss the mechanical and deformation behavior of piles in coastal soft soil areas under horizontal load，the corresponding simplified mechanical model was established according to the loading characteristics of piles in coastal soft soil areas.Secondly，the softening effect of coastal soft soil was considered to modify the existing p-y curve model.On this basis，the differential equation of pile deflection in coastal soft soil areas was derived，and its internal force and displacement were solved by the transfer matrix method.A nonlinear calculation method of piles in coastal soft soil areas considering the softening effect was obtained.Finally，the influence of softening parameters，pile diameter，and elastic …

Research On Road Performance Of Carbonaceous Shale Subgrade Filler, Zhang Mengjin, Huang Yafei, Wu Qian, Mao Xuesong, Zhang Jianxun, Chen Xinyi, Wang Yueyue

Journal of China & Foreign Highway

The application of carbonaceous shale for subgrade filling not only alleviates the shortage of subgrade filler in carbonaceous shale distribution areas but also meets the strategic requirements of “resource conservation and saving ” and “green development ” for infrastructure construction in China.However，such rocks are weak and susceptible to weathering and disintegration，and they exhibit significant strength deterioration when exposed to water.To fully apply them，their performance must be comprehensively understood.In this paper，the basic properties of the carbonaceous shale were studied，and filler gradation was designed.The tests on compaction characteristics of the filler and particle crushing characteristics after compaction，RCBR （California bearing ratio ） variation …

Test And Analysis On Stress And Deformation Of Assembled Geocell Retaining Wall, Kong Yongbo, Li Hao, Zhang Jianwei, Li Junjie, Yang Xiaohua

Journal of China & Foreign Highway

The variable cross-section geocell retaining wall of the Chengdu –Yibin Expressway test road in Sichuan Province of China was studied.First，the construction method of the new-type assembled geocell retaining wall was introduced，and the new-type glass fiber reinforced plastic lightweight panel was used to effectively solve the problem that the panel of the retaining wall is not neat and easy to be damaged.Secondly，the supporting effect of the retaining wall was analyzed by field monitoring.The field monitoring results show that the earth pressure at different parts of the retaining wall is nonlinearly distributed along the height of the retaining wall.The earth pressure at …

Structure And Material Of Rigid‑Flexible Composite Pavements And Development, Liu Zhaohui, Huang You, Yu Shiqing, Liu Jingyu, Li Sheng, Liu Li, Pan Yu

Journal of China & Foreign Highway

The rigid-flexible composite pavement，as a kind of durable pavement structure，has been widely used for heavy-duty traffic，special geological conditions，bridge tunnel paving，etc.In order to promote the application of durable rigid-flexible composite pavements and clarify the key research issues and development directions，relevant research progress of rigid-flexible composite pavements in China and abroad was reviewed.Based on the structure design theory and construction technology of rigid-flexible composite pavements，the structural mechanical behavior characteristics of rigid-flexible composite pavements were described，and the stress induced by load and temperature of asphalt surface layer and rigid base layer，as well as their interactions were analyzed.The asphalt surface layer on the rigid …

Reasearch On Fatigue Failure Law In Tension‑Shear Zone Behind Wheel In Rigid And Flexible Composite Pavement, Cheng Xiaoliang, Deng Fuhao, Wang Yang, Han Leilei, Zhou Wujun

Journal of China & Foreign Highway

In order to study the slippage mechanism of asphalt concrete overlay on continuous reinforced concrete composite pavement （CRCP），the structure of the composite pavement was modeled using the elastic layered system，and the interlayer bonding state of the model was calibrated by the measured data of the road.In the analysis of interlayer mechanical behavior，it was found that when the horizontal force coefficient was 1，there existed a tension-shear zone behind the wheel，which may lead to the failure of this zone prior to the position of the maximum interlayer shear stress.Relevant test data analysis shows that when the horizontal force coefficient is 1，under the …

Multi-Region Plane Fitting Algorithm For Texture Depth Of Asphalt Pavements, Zhu Feng, Feng Xingle, Wu Chuan, Lin Xiaoyong

Journal of China & Foreign Highway

The existing calculation methods for texture depth of asphalt pavements are easily affected by external and human factors.Therefore，a multi-region plane fitting algorithm for the texture depth based on three-dimensional （3D） linear laser data was proposed.The algorithm preprocessed the collected 3D height data matrix of the pavement and derived a slope-based adaptive filtering algorithm for point cloud data.Then, the 3D height matrix was divided into multiple regions，and the local extremum of the center point was determined.Finally，with the three-point and one-surface plane fitting algorithm as the core，the texture depth of asphalt pavements was calculated.The experimental results show that the correlation between this …

Influence Of Warm‑Mixed Flame Retardant Technology On Construction Environment Of Asphalt Pavement In Long Tunnel, Xian Jianglin, Li Yanxiang, Yang Qingyang

Journal of China & Foreign Highway

With the long tunnel as the research object，the variation of volatile organic compound （VOC） volume fraction，CO volume fraction，and illuminance in the construction area of the middle of the tunnel under the conditions of hot mix technology and warm-mixed flame retardant technology was tested respectively，and the influence of warm-mixed flame retardant technology on the construction environment of asphalt pavement in long tunnels was analyzed and evaluated.The results show that when the pavement of a long tunnel adopts hot mix technology，the mass concentration of asphalt fume in the whole operation area is relatively high，and that in some areas exceeds the threshold value.The …

Evaluation Of Long‑Term Water Stability Of Acidic Diorite Asphalt Mixtures In Different Environments, Cao Zhonglu, Chen Ping, Liu Xuewen, Tan Bo

Journal of China & Foreign Highway

The short-term water stability of acidic diorite asphalt mixtures with acid-alkaline composite aggregates mixed with cement （2% cement instead of mineral powder ），slaked lime （30% slaked lime water for stone immersion ），and anti-spalling agent （modified asphalt with 0.3% anti-spalling agent ） was evaluated by Marshall test of immersion，freeze-thaw splitting test，and rutting test.Then，by repeated freeze-thaw splitting test，repeated freeze-thaw and baking splitting test，and repeated acid-etching freeze-thaw splitting test，the long-term water stability of the treated acidic diorite asphalt mixtures in different environments was tested.The results show that the physical and mechanical properties of acidic diorite meet the specification requirements；the short-term water stability of …

Experimental Study On Fracture Performance Of Emulsified Asphalt Cold Recycled Mixture, Chu Chenfeng, Deng Jun, Zhou Chen, Wang Zi ’Ang, Kuang Ao, Liu Hongfu

Journal of China & Foreign Highway

Cracking in emulsified asphalt cold recycled pavements is one of the main constraints on their large-scale application in road engineering.To study the fracture performance indicators of cold recycled asphalt mixture and the improvement measures of crack resistance performance，this study investigated three types of mixtures：ordinary emulsified asphalt，basalt fiber，and styrene-butadiene rubber （SBR） modified emulsified asphalt.This study conducted a four-point bending strength test on notched beams，and acoustic emission tests of the beam with prefabricated cracks were carried out to evaluate the fracture performance of three different emulsified asphalt cold recycled mixtures in road engineering.The evaluation criteria included strain energy release rate，stress intensity factor，energy …