Civil and Environmental Engineering Commons^™

Material Suppliers’ Perspective On Collaboration In Industrial Construction Projects, Seogjae Choi, William J. O'Brien

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Material suppliers' involvement in construction project planning has been recommended as an effective measure to improve project performance by using their expertise. However, the recommendation is not universal, and some researchers disputed the value of early involvement of suppliers depending on material type. Moreover, prior studies considered main contractors' and owners' perspectives mostly in examining how to increase the involvement of suppliers. To add material suppliers' perspective, this study conducted interviews with experienced professionals from 16 material suppliers including standardized, make-to-order, and custom products. The results are specified by separating the type of materials and sub-phases of planning. The results …

Hydraulic Connectivity And Hydrochemistry Influence Microbial Community Structure In Agriculturally Affected Alluvial Aquifers In The Midwestern United States, Hunter W. Schroer, Kendra Markland, Fangqiong Ling, Craig L. Just

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Alluvial aquifers can provide ecosystem services and drinking water but much remains unknown about human effects on aquifer microbiomes. Therefore, we used amplicon sequencing and hydro chemical characterization to pair microbial communities with environmental conditions across 37 alluvial aquifer wells. The study region spanned eastern Iowa and southern Minnesota (USA) and contained a combination of drinking water and monitoring wells. In terms of microbial ecology, dominant phyla across the wells included Proteobacteria, Bacteroidota, Patescibacteria, Planctomycetota, and Nitrospirota. Tritium, an indicator of infiltration and surface water influence, was the highest correlated variable with the Shannon index (α-diversity) by the Spearman rank …

Forecasting State-Level Construction Labor Earnings For Enhanced Project Cost Control: An Econometric And Deep-Learning Analysis Of The Leading Economic Indicators, Ahmed Shiha, Islam H. El-Adaway

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

As a major input to several work packages, the labor element constitutes a critical component for successful performance of construction projects. Localized labor shortages, fundamental changes in prevailing wage laws, and historical shifts in the unionization rates of construction workers impair the adequate estimation of construction labor costs in diverse labor market dynamics. Meanwhile, existing studies have utilized national-level indicators to study the trends of construction labor costs, but the relationship between the multifaceted local economic factors and state-level construction labor costs remains understudied. This paper fills such a knowledge gap. A three-stage methodology is adopted: (1) data collection of …

Guest Editorial, Li Ai, Xiao Tan, Arslan Akbar, Guirong Yan

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

No abstract provided.

Polarimetry Based Radar Estimation Of Extreme Rainfall: Case Studies, Bong Chul Seo, Witold F. Krajewski, James A. Smith

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The study evaluated radar-derived polarimetric rainfall estimates for extreme rain events that occurred in the Kansas City Metropolitan area in the United States. To derive quantitative precipitation estimates (QPE), we implemented two polarimetric algorithms based on specific attenuation (A) and specific differential phase (KDP), along with the reflectivity (Z) based one using data from two radars in the study area. The analysis to assess radar-rainfall estimates (R) utilizes ground observations from a dense network of about 170 rain gauges. Based on our analysis results, the two polarimetric estimates from R(A) and R(KDP) outperform the conventional estimation R(Z). R(A) appeared to …

Aqueous Carbonation Of Steel Slags: A Comparative Study On Mechanisms, Nannan Zhang, Gao Deng, Wenyu Liao, Hongyan Ma, Chuanlin Hu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study investigated the aqueous carbonation mechanisms of three typical steel slags: ladle metallurgy furnace (LMF) slag containing high Al content, electric arc furnace (EAF) slag featuring high Si content and relatively low Al content, and ladle-arc fusion (LAF) slag with medium-Al content. It was found that the carbonation kinetics of the three slags were similar and followed the surface coverage model within the first 6 h of carbonation. Initially, the carbonation process was primarily governed by the reaction product precipitation. After 3 h of carbonation, the process was dominated by mineral dissolution, controlled by the uncovered reactive sites. The …

Reevaluating The Van’T Hoff And Arrhenius Equations: How Temperature And Pressure Affect Chemical Reaction Thermodynamics, Equilibrium, And Kinetics, Jianmin Wang

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The van’t Hoff equation, which is used to calculate the effect of temperature on equilibrium constants, was derived from the Gibbs – Helmholtz equation that relates the molar Gibbs free energy to the molar enthalpy of a chemical reaction. However, the Gibbs – Helmholtz equation was developed for systems that do not consider contributions of Gibbs free energy from chemical species. Consequently, the van’t Hoff equation and the Arrhenius equation derived from it are technically incomplete.

By employing Hess’s law and the appropriate Gibbs free energy equation for chemical reaction systems, this investigation develops theoretical equations to calculate the effects …

An Improved Table Method For Coded Target Identification With Application To Photogrammetric Analysis Of Soil Specimen During Triaxial Testing, Xiaolong Xia, Xiong Zhang, Sara Fayek, Zhaozheng Yin

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Accurate and efficient recognition and identification of coded targets are of great importance in coded target-based photogrammetry. Recently, a deep learning-based method has been utilized to recognize the coded targets. Then, a table method has been developed to decode the coded targets, identify falsely identified coded targets, and recover missing coded targets. This method takes advantage of the geometric arrangement of the coded targets. In this paper, an improved table method has been developed to improve the coded targets recognition and identification results. Blob analysis, instead of deep learning, is utilized to recognize coded targets. Then, the RANSAC algorithm was …

Ce 200 - 102: Surveying, Allison Lapatka

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 200a - 002, 004: Surveying Lab, Allison Lapatka

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 260 - 002, 004, 102, Hm2: Civil Engineerng Methods, Stephanie Santos

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 210 - 004: Constrn Matrls & Procdrs, Frank Golon

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 210 - 102, Hm2: Constrn Matrls & Procdrs, Maaz Choudhry

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 320 - 002, 102: Fluid Mechanics, Thomas Olenik

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 321 - 002, 102: Water Resources Engr, Thomas Olenik

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 332 - 102: Hydraulic Engineering, Sunil Saigal

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 332 -002: Structural Analysis, Mohamad Saadeghvaziri

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 333 - 002: Reinforced Concrete Design, Matthew Bandelt

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 333 - 102: Reinforced Concrete Design, Eduardo Castro

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 341 - 004: Soil Mechanics, Andrew Ciancia

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 341a - 002: Soil Mechanics Lab, Ayodeji Aderibigbe

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 341a - 004: Soil Mechanics Lab, Prabhakar Khadka

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 342 - 002, 004: Geology, John Schuring

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 342 - 106: Geology, Alan Slaughter

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 350 - 102: Transportation Engineering, Branislav Dimitrijevic

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 350 - 106: Transportation Engr, Yun Bai

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 410 - 102: Constr Schedlng/Estimtng, Avinash Prasad

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 443 - 002: Foundation Design, Andrew Ciancia

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 432 - 002, Hm2: Steel Design, Methi Wacharatama

Civil and Environmental Engineering Syllabi

No abstract provided.

Ce 461 - 102: Professional Practice In Cee, Avinash Prasad

Civil and Environmental Engineering Syllabi

No abstract provided.