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Full-Text Articles in Other Materials Science and Engineering
Development Of Cost-Effective High-Modulus Asphalt Concrete (Hmac) Mixtures Using Crumb Rubber And Local Construction Materials In Louisiana., Ibrahim A.I.E Elnaml
Development Of Cost-Effective High-Modulus Asphalt Concrete (Hmac) Mixtures Using Crumb Rubber And Local Construction Materials In Louisiana., Ibrahim A.I.E Elnaml
LSU Master's Theses
One of the emerging solutions to enhance the durability of asphalt pavements is the use of a French asphalt mix known as “High-Modulus Asphalt Concrete (HMAC).” This mix uses a hard asphalt binder, high binder content (about 6%), and low air voids content as compared to Superpave mixtures. The key objective of this study was to develop a cost-effective HMAC mixture using crumb rubber and local materials in Louisiana. To achieve this objective, four HMAC mixtures were prepared using two asphalt binders (PG 82-22 and PG 76-22 plus 10% crumb rubber) and two Reclaimed Asphalt Pavement (RAP) contents (20% and …
EcodiseñO Y OptimizacióN De Recursos En La ConstruccióN Sostenible Colombiana, Diego Andrés Chuquen Ortiz
EcodiseñO Y OptimizacióN De Recursos En La ConstruccióN Sostenible Colombiana, Diego Andrés Chuquen Ortiz
Ingeniería Civil
Considerando el hecho que el sector de la construcción es una industria altamente contaminante, la cual aporta efectos adversos al medio ambiente como producto de la sobreexplotación de materias primas y la disposición de residuos, se hace necesario considerar la implementación de estrategias que permitan a sus actores, como son los constructores y productores de materiales, tener un punto de partida con el cual se puedan orientar para hacer aplicación de ecodiseño en sus procesos y optimizar recursos, aplicando los criterios de la construcción sostenible. Es por ello que, en esta investigación se planteó exponer el escenario colombiano respecto de …
Crystalline Analysis Of Geomicrobially-Induced Calcium Carbonate Precipitation In Sands Using A Surface Percolation Treatment Technique, Justin Edward Mulloney
Crystalline Analysis Of Geomicrobially-Induced Calcium Carbonate Precipitation In Sands Using A Surface Percolation Treatment Technique, Justin Edward Mulloney
UNF Graduate Theses and Dissertations
Ottawa 50/70 sand specimens and natural beach sand samples were treated using bio-augmented geomicrobies via a surface percolation technique. Testing was conducted on these specimens to determine how resultant calcium carbonate precipitation changed as a function of temperature, depth from the surface, and in the presence of magnesium. Specifically, x-ray Diffraction (XRD), a Scanning Electron Microscope (SEM), and Energy Dispersive X-ray Spectroscopy (EDS) were used to determine and quantify the presence of calcium carbonate and its associated phase. Results showed a direct relationship between temperature and precipitated calcium carbonate. In addition, as an unintended consequence associated with the treatment, ammonium …