Environmental Impacts of Leachate from Portland Cement Concrete (PCC) with and Without Plasticizer in Highway Construction

Azizian, Mohammad F.; Nelson, Peter O.; Thayumanavan, Pugazhendhi; Williamson, Kenneth

doi:10.1007/b11432

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…The remaining literature studies not presented in Tables 16 and 17 come to the same general conclusion that pavement materials are not a significant source of leachable pollutants. Azizian et al (2005) tested calcium and aluminum deposits from concrete paving materials and conclude that "the use of PCC and PCC with plasticizers should not be of concern regarding aquatic toxicity" (p. 59) [113]. Marion et al (2005) looked at heavy metals in paving concretes and conclude that "in view of the very small amounts leached, the risk of contamination of the soil and the water that seeps through it seems non-significant" (p. 956) [114].…”

Section: Leachatementioning

confidence: 99%

Life Cycle Assessment of Pavements: A Critical Review of Existing Literature and Research

Santero¹,

Masanet²,

Horvath³

2010

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This report provides a critical review of existing literature and modeling tools related to lifecycle assessment (LCA) applied to pavements. The review finds that pavement LCA is an expanding but still limited research topic in the literature, and that the existing body of work exhibits methodological deficiencies and incompatibilities that serve as barriers to the widespread utilization of LCA by pavement engineers and policy makers. This review identifies five key issues in the current body of work: inconsistent functional units, improper system boundaries, imbalanced data for asphalt and cement, use of limited inventory and impact assessment categories, and poor overall utility. This review also identifies common data and modeling gaps in pavement LCAs that should be addressed in future work. These gaps include: the use phase (rolling resistance, albedo, carbonation, lighting, leachate, and tire wear and emissions), asphalt fumes, feedstock energy of bitumen, traffic delay, the maintenance phase, and the end-of-life phase. This review concludes with a comprehensive list of recommendations for future research, which shed light on where improvements in knowledge can be made that will benefit the accuracy and comprehensiveness of pavement LCAs moving forward.

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Section: Leachatementioning

confidence: 99%

Life Cycle Assessment of Pavements: A Critical Review of Existing Literature and Research

Santero¹,

Masanet²,

Horvath³

2010

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“…Leachate is the substance drained from some pavement materials that may debase water quality and possibly represent a danger to drinking water. Azizian et al and Marion et al [16,17] reach conclusions that contaminants found in overflow makes from vehicular sources as opposed to pavement materials.…”

Section: Lca Research Gapmentioning

confidence: 96%

Life Cycle Assessment for Pavement Sustainable Development: Critical Review

Babashamsi

Yusoff

Ceylan

et al. 2015

AMM

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Certainly, one of the most cost effective and comprehensive infrastructure assets of the build environment is road infrastructure. The environmental impacts of this asset during its life-cycle drive researchers to create a foundational framework to quantify these effects. Life cycle assessment (LCA), a method for the assessment of all modules in a life cycle, has been examined to evaluate all the environmental modules and components of road projects due to constraints of environmental assessments. The enthusiasm for enhancing the sustainable development of basic infrastructure leads to quick expansion on pavement life cycle assessment. An audit of applicable published LCA studies has recognized that environmental modules, such as the usage module (rolling resistance of pavement, carbonation, and albedo), end of life (EOL) module, and components such as traffic congestion during the construction module are not regarded in most of the articles. These modules potentially have the same environmental impact as other regularly considered modules such as materials, transportation, and construction. The goal of this study is to recognize shortfalls in the fields that bolster pavement LCA, to prepare a comprehensive and straight forward methodology, and to provide a basis on which related studies can move forward

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“…Some authors used only saturated Ca(OH) 2 as a substitute for the pore solution, which is not representative of all of the ions that may be present in pore solution that play a role in the passivation and corrosion processes (3). Additives such as organic salts, organic acids, fatty acids and detergents, sulfonated plasticizers amongst others (4), that are added to cement specific to their application can further have contributions to the pore solution chemistry which make the corrosion environment more complex than just the representative alkaline pH (5). In numerous studies, Na + , Ca 2+ , K + , OH -.…”

Section: Introductionmentioning

confidence: 99%

“…In numerous studies, Na + , Ca 2+ , K + , OH -. SO 4 2-, Cland HCO 3 -1 have been reported to be present in cement pore solutions and leachates (4,6), based on whether the cement is additionally exposed to brine and/or CO 2 . These have also been tested for effects on corrosion of steel reinforcements in cement (1,3,(7)(8)(9)(10)(11)(12)(13)(14).…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of 13Cr Casing in Cement Synthetic Pore Solution

et al. 2015

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A test procedure was designed and employed for exposure and degradation testing of well cements in a simulated downhole environment of offshore deep drilling. A Class H cement sample was crushed to coarse grains and was exposed to 5 % mass NaCl(aq) solution in contact with CO2 at 100 °C and 10 MPa for 200 hours. Key ionic species were identified from the aqueous phase from the testing to develop the cement synthetic pore solution (CSPS) recipe. The CSPS was then used for corrosion characterization of high chromium well casing steel at the same conditions of the cement exposure for 60 hours. The corrosion potential in the measurements ranged between -0.4 and -0.5 V vs. SHE. The average corrosion rate of the steel samples was on the order of 0.1 mm/year, representing a worst-case scenario for degradation of the cement material, but significant for critical steel components like a well casing.

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Environmental Impacts of Leachate from Portland Cement Concrete (PCC) with and Without Plasticizer in Highway Construction

Cited by 4 publications

References 7 publications

Life Cycle Assessment of Pavements: A Critical Review of Existing Literature and Research

Life Cycle Assessment of Pavements: A Critical Review of Existing Literature and Research

Life Cycle Assessment for Pavement Sustainable Development: Critical Review

Corrosion Behavior of 13Cr Casing in Cement Synthetic Pore Solution

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