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California Polytechnic State University, San Luis Obispo

Civil and Environmental Engineering

Sustainable

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Full-Text Articles in Architecture

Investigation Of Natural Pozzolans: Analyzing The Practicality Of Natural Pozzolans As A Partial Substitute For Cement In Grout Production, Jadyn I. Breien, Andrew J. Baro, Logan T. Marino Jun 2023

Investigation Of Natural Pozzolans: Analyzing The Practicality Of Natural Pozzolans As A Partial Substitute For Cement In Grout Production, Jadyn I. Breien, Andrew J. Baro, Logan T. Marino

Architectural Engineering

This senior project aims to investigate whether natural pozzolans are more sustainable than fly ash and a sufficient substitute for cement in the production of grout. By following the intent of the ASTM (American Society of Testing and Materials) standards, a conclusion will be made to determine if natural pozzolans can contribute comparable strength in compression. The objective is to prove that natural pozzolans should be utilized in the production of grout rather than alternatives such as fly ash because it can provide similar strength while being more economical and more sustainable.


Construction Of A Sustainable High-Tech Greenhouse, Miguel A. Sadler Jun 2020

Construction Of A Sustainable High-Tech Greenhouse, Miguel A. Sadler

Construction Management

The purpose of this project is to assess the feasibility for farmers to upgrade from conventional farming methods to using sustainable, high-tech greenhouses. For all intensive purposes, the values presented in this paper are based off the assumption that a farmer already owns their land and can use this paper as a reference to see what it would look like if they wanted to make the upgrade to high-tech greenhouses. To assess the viability of this project my partner and I set out to complete all the preconstruction activities that a project team would need to complete for a potential …


Methane Production By A Packed-Bed Anaerobic Digester Fed Dairy Barn Flush Water, Sean Richard Thomson Dec 2014

Methane Production By A Packed-Bed Anaerobic Digester Fed Dairy Barn Flush Water, Sean Richard Thomson

Master's Theses

Packed-bed digesters are an alternative to covered lagoon digesters for methane production and anaerobic treatment of dilute wastewaters such as dairy barn flush water. The physical media of packed-beds retain biofilms, often allowing increased treatment rates. Previous studies have evaluated several types of media for digestion of dilute wastewaters, but cost and media fouling have setback commercial development. A major operational cost has been effluent recirculation pumping.

In the present effort, a novel approach to anaerobic digestion of flush dairy water was developed at pilot-scale: broken walnut shells were used as a low-cost packed-bed medium and effluent recirculation was replaced …