Abstracts – Browse Results
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Fathi, M (2020) Public-private partnership contract framework development and project performance analysis compared to design-build in the US highway projects, Unpublished PhD Thesis, , University of Nevada, Las Vegas.
Maharjan, R (2017) Effects of contract procurement factors on performance of transportation projects, Unpublished PhD Thesis, , University of Nevada, Las Vegas.
Motaharikarein, S (2019) Development of natural perlite based concrete for sustainable construction, Unpublished PhD Thesis, , University of Nevada, Las Vegas.
- Type: Thesis
- Keywords: replacement; migration; sustainable construction
- ISBN/ISSN:
- URL: https://www.proquest.com/docview/2406925928
- Abstract:
This study aimed to partially replace Portland Cement (PC) with environmentally friendly binders capable of improving the longevity of concrete. The new binders consisted of different proportions of natural pozzolan (perlite) with various fineness and particle size distributions. A step-by-step research program was designed to: (1) discover the optimum fineness of perlite powder and its optimum replacement level with cement; (2) investigate the rheological properties of the perlite-containing mixtures, and examine whether this binder can be used in selfconsolidating concrete; and (3) assess the weaknesses of the new binder, and improve its deficiencies by using nanomaterials such as nano-silica. The major variables included in this study were perlite replacement level, fineness of perlite, cement content, and water-to-binder ratio. The experimental program assessed the performance of the perlite-containing concrete mixtures, including fresh properties (flow-ability and workability), mechanical properties (compressive strengths), and transport properties (absorption, rapid chloride penetration, and rapid chloride migration). This study also compared the performance of perlite-containing concretes with that of an equivalent reference PC concrete, with similar flow and strength characteristics. The results of this study revealed that it was possible to find optimum binder proportions to achieve adequate plastic and hardened properties. For nearly all of the studied perlite-containing concretes, workability and flow-ability were in the acceptable ranges. The mechanical properties (compressive strength) of the perlite-containing concretes were slightly higher than those of the reference PC concrete, and the transport properties of the perlite-containing concrete were significantly better than those of the reference PC.
Nikkhah Manesh, S (2020) Temporal and spatial analysis of the wage gap for women and underrepresented minorities in the architecture, engineering, and construction (AEC) workforce, Unpublished PhD Thesis, , University of Nevada, Las Vegas.
Sakhakarmi, S (2022) Automated approach for the enhancement of scaffolding structure monitoring with strain sensor data, Unpublished PhD Thesis, , University of Nevada, Las Vegas.
Shrestha, B K (2021) Relationship between standardization critical success factors (CSFs) and project performance, Unpublished PhD Thesis, , University of Nevada, Las Vegas.
Shrestha, K (2016) Framework of performance-based contracting for chip seal and striping maintenance activities, Unpublished PhD Thesis, , University of Nevada, Las Vegas.
Shrestha, K K (2016) Causes of change orders and its impact on road maintenance contracts, Unpublished PhD Thesis, , University of Nevada, Las Vegas.
Tafazzoli, M (2017) Dynamic risk analysis of construction delays using fuzzy-failure mode effects analysis, Unpublished PhD Thesis, , University of Nevada, Las Vegas.