Sustainable Highway Construction (2019) / Chapter Skim
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Pages 145-182
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145 Appendix A: Survey Results Summary
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146 A1. SURVEY TEXT This is the text from the online survey.
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147 Informed Consent This is the official version of what we are required to tell you about your participation in the survey. Lead Researcher: Dr.
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148 Section 1: Demographics We want to gather some information about your organization and where/how it works with highway construction. Logic: Show/hide trigger exists.
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149 Logic: Hidden unless: Question "Which of the following most accurately explains your organization's role in the Engineering/Construction Industry? You may select more than one if you or your organization has more than one role on the list.
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150 Logic: Hidden unless: Question "Which of the following most accurately explains your organization's role in the Engineering/Construction Industry? You may select more than one if you or your organization has more than one role on the list.
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151 Logic: Hidden unless: Question "What kind of position do you hold in your organization? We have listed relevant categories as they are defined by the Equal Employment Opportunity Commission." #6 is one of the following answers ("Other")
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152 [ ] Region 9- Arizona, California, Hawaii, Nevada, Guam, American Samoa and North Marianas [ ]
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153 Logic: Show/hide trigger exists.
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154 Section 2: Personal and Organizational Association with Sustainability We want to understand how you view the term "sustainability" and how your organization addresses it.
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155 16) In a previous study on sustainability, the following were identified as negative impacts from construction activities.
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156 Section 3: Sustainability in Highway Construction Practices We want to know what you have done or seen that could at all be considered "sustainable". If you are not sure, include it.
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157 Estimating Public outreach ____________________________________________ ____________________________________________ Sustainable practices in these project areas? Earthwork Drainage/sewer/water Structures Paving Landscaping Materials/energy ____________________________________________ ____________________________________________ Sustainable practices in these project areas?
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158 This page asks about the consequences of or recognition for sustainable practices.
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159 further to this research. Specifically, we are looking for individuals that would be willing to: Be interviewed by the research team (either in-person on remotely)
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160 First Name: _________________________________________________ Last Name: _________________________________________________ Title: _________________________________________________ Company Name: _________________________________________________ City: _________________________________________________ State: _________________________________________________ Email Address: _________________________________________________ Phone Number: _________________________________________________ 23) Please enter any other comments you might have about sustainability or this survey.
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161 A2. SURVEY RAW RESPONSES Sustainable practices in these organizational areas?
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162 Other than Caltrans, most agencies that I work with do not seem to emphasize sustainable practices in their organizational activities outside of their use of recycling containers and automatic lighting and climate controls. I am not sufficiently familiar with Caltrans organizational practices to comment on them.
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163 We helped organize and continue to participate in industry activities to lower cement Co2, and develop better practices to design pavements and buildings. anti-idling, use of low sulfur diesel fuel, dust mitigation, construction vehicle washing for invasive species control, recycle material, recycle scrap materials.
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164 Sustainable practices in these project delivery areas? (66 responses)
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165 Example: Contracts for construction now put focus on performance related specifications for both materials and for construction of pavements and structures. Prescriptive / method specifications are being replaced resulting in improved quality and innovation.
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166 to do so. This is true both for analyses of individual projects, as well as statewide pavement networks.
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167 Including environmental impact assessment in procurement of materials in NL. Including environmental impact assessment in design in NL.
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168 In our construction inspection activities, we are using electronic documentation systems to reduce paperwork, and administrative time. Use of life-cycle cost analysis in project selection.
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169 Our construction inspection staff use a mobile app called Mobile Inspector to complete DWR entries while at the job site, which improves their productivity. We have been experimenting with digital project delivery, using 3D models, and the use of CPM on projects.
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170 We have developed a lot of expertise in house on the best practices we should for drainage and earthwork, plus we have striven to allow Contractors the flexibility to do more with recycled materials. We use 3D design to fully maximize GPS earthwork and project construction, saving time and fuel consumption on the contractor's end.
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171 There are a few contractors using hot in-place or cold in-place paving. I am also aware of a few projects that used 100% recycled asphalt.
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172 material will have a positive impact in many ways. We have seen a 70% difference in the amount of virgin aggregate required between two structurally equivalent pavements - the Asphalt option required 24,960 tonnes/km of granular material, and the concrete option required 7,680 tonnes/km.
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173 we used recycled material for base course layer in pavement structure, CBR was ok but still have doubt on the physical properties. We use tire shreds in embankments; hot-in-place or cold-in-place recycling of hot mix asphalt pavements; recycled glass in pavements, as drainage materials, or filter media; asphalt pavement mixes containing recycled asphalt pavement (RAP)
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174 Constructability review is incorporated into the project development process to avoid potential issues during construction. We fully endorse the use of public information programs and technologies to improve the travel circumstances for large complex projects which could have major traffic flow impacts.
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175 traffic)
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176 Most asset management systems (pavements, structures, geotechnical assets, etc.) support sustainability by improving/quantifying project selection and life-cycle cost analyses.
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177 We used reclaimed asphalt on a project to save "virgin" aggregate, however we had so many QC issues we were forced to remove and replace it all. Many recyclable products have had unacceptable failure rates when used in asphalt roadways: shingles, toilets, glass, tires.
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178 Warm mix asphalt currently has a dubious brand with some customers. Customers/agencies fail to see if there is environmental benefit.
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179 the pervasive use of bottled water is rooted largely in the perception that it is ok to buy cases-uponcases of these bottles since they are recycled (which they more often than not, aren't)
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180 Sustainability sometimes gets in the way of common sense. Need to determine effect of sustainability on the long-term performance of the material being used.
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181 We have not really made an effort to promote the use of materials or construction practices as sustainable. Some of these include changes to asphalt specifications, use of stainless steel rebar, changes to concrete specs, use of different types of piles, etc.
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182 Our annual awards program includes an award for environmental benefit that honors a project that provided extraordinary environmental benefit while maintaining a high degree of quality. Environmental Benefits may include storm water management, high volume recycling, LEED credits, or a project that was completed in an environmentally sensitive area.
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