首页> 外文学位 >Environmental performance of on-site construction processes in post-tensioned slab foundation construction: A study of production home building in the greater Phoenix area.
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Environmental performance of on-site construction processes in post-tensioned slab foundation construction: A study of production home building in the greater Phoenix area.

机译:后张式楼板基础施工中现场施工过程的环境绩效:大凤凰城地区生产房屋的研究。

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摘要

There is an increased movement in the construction industry towards sustainable development, understanding life-cycle environmental impacts and reducing carbon footprint. This research considers the environmental performance of on-site construction processes in the concreting phase of production home construction. This study presents a process-specific quantification of carbon emissions based on the transportation of construction crews, materials, and equipment in post-tensioned slab foundation construction, a foundation system widely used for production homes in the Greater Phoenix Arizona area. Post-tensioned slab foundation construction typically involves a concrete trade contractor, sub-trade contractors for grading aggregate base course (ABC) and post-tensioning, suppliers of ready-mix concrete, ABC and a concrete pump truck, a builder superintendent and code-compliance inspectors.;The primary conclusions are: (a) ready-mix concrete transportation is a significant source of emissions in the concreting phase; other important components are transportation of the trade contractor crews and concrete pump truck; (b) the concreting phase and the framing phase are comparable in terms of transportation-based CO2 emissions even though these phases differ significantly in terms of cost and weight of materials transported; and (c) CO2 emissions for on-site equipment use are in the range of 6 to 12% of transportation-based CO2 emissions in the concreting phase. This research is valuable to home builders and specialty trade contractors who wish to measure their carbon emissions based upon on-site construction processes and compare environmental performance of different construction scenarios.;This study includes multiple residential construction sites in the Greater Phoenix area, and consists of: (i) identifying all construction activities and the party responsible for each; (ii) collecting travel and fuel use data from trade contractors and through field observations; (iii) calculating CO 2 emissions for a generalized base case representative of the Greater Phoenix area and the relative contribution of various trades; (iv) studying the influence of material and equipment transportation; and (v) what-if analysis for material, equipment and crew transportation depending upon subdivision location, trade contractor location and home size. Further, CO 2 emissions of transportation in the framing phase, on-site equipment use and rework during the concreting phase are presented.
机译:建筑行业正在朝着可持续发展,了解生命周期环境影响和减少碳足迹的方向发展。这项研究考虑了生产房屋建设的具体阶段中现场施工过程的环境绩效。这项研究提出了一种基于特定过程的碳排放量量化方法,该方法基于后张拉式平板基础施工中的施工人员,材料和设备的运输而定,该基础体系是大凤凰城亚利桑那州地区生产房屋广泛使用的基础系统。后张拉的平板基础施工通常包括混凝土贸易承包商,对骨料基础层级(ABC)进行等级评定的子贸易承包商,预拌混凝土的供应商,ABC和混凝土泵车,建筑商管理人和规范-主要结论是:(a)预拌混凝土运输是在混凝土浇筑阶段的重要排放源;其他重要组成部分是贸易承包商人员和混凝土泵车的运输; (b)固结阶段和框架阶段在基于运输的二氧化碳排放方面是可比的,尽管这些阶段在成本和所运输材料的重量方面存在显着差异; (c)现场设备使用的CO2排放量占固结阶段基于运输的CO2排放量的6%至12%。这项研究对于希望根据现场施工过程测量其碳排放并比较不同施工方案的环境绩效的房屋建筑商和专业贸易承包商而言非常有价值。该研究包括大凤凰城地区的多个住宅建筑工地,包括:(i)确定所有建筑活动以及每个活动的责任方; (ii)收集贸易承包商的旅行和燃料使用数据,并通过实地观察; (iii)计算代表大凤凰城地区的一般基础案例的CO 2排放量以及各种行业的相对贡献; (iv)研究物料和设备运输的影响; (v)根据细分位置,贸易承包商位置和房屋面积对物料,设备和人员运输进行假设分析。此外,还介绍了框架阶段的运输过程中的CO 2排放,混凝土阶段的现场设备使用和返工。

著录项

  • 作者

    Palaniappan, Sivakumar.;

  • 作者单位

    Arizona State University.;

  • 授予单位 Arizona State University.;
  • 学科 Engineering Civil.;Engineering Environmental.;Sustainability.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 216 p.
  • 总页数 216
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 11:38:20

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