8 research outputs found
Laboratory Fatigue Studies on Bituminous Concrete Mixes Utilizing Waste Shredded Plastic Modifier
No full textThe behavior of the bituminous concrete mix containing a binder additive in the form of recycled shredded waste plastic bags was discussed. Marshall stability tests were carried out to determine the optimum bitumen content (OBC) and optimum modifier content (OMC) of the bituminous concrete mix. The fatigue life of the plastic modified bituminous concrete specimens for equal tensile strain was much higher than than that of bituminous concrete specimens tested at same temperature. It was also found that bituminous concrete mixes with plastic modifier exhibited much longer fatigue life than the conventional bituminous concrete
Behavior of asphalt concrete mixtures with reclaimed polyethylene as additive
No full textThis paper deals with the viability of using reclaimed polyethylene (PE) derived from low-density PE carry bags collected from domestic waste as an additive in asphalt concrete mixtures. Different ratios of PE (2.5, 5.0, 7.5, and 10 by weight of asphalt) were blended with (80/ 100)-paving grade asphalt. The dynamic creep test (unconfined), indirect tensile test, resilient modulus test, and Hamburg wheel track tests were carried out on asphalt concrete mixtures blended with PE. The analyses of test results show that the performance of PE-modified asphalt mixtures are better when compared to conventional mixtures. The rutting potential and temperature susceptibility can be reduced by the inclusion of PE in the asphalt mixture. A PE content of 5 by weight of asphalt is recommended for the improvement of the performance of asphalt concrete mixtures similar to that investigated in this study. © 2007 ASCE
Role Of Team Diversity on Team Performance and Ambidexterity: Case study of product and service-based teams from semi-conductor industry
No full textDiversity as a topic is increasingly becoming important aspect of organizations and society in general. Team diversity could bring different perspectives and thus diverse teams could reap the benefits such as better performance, innovation, and problem-solving abilities. Teams face challenge of deciding between alignment activities focused on organizational goals vs adaptability activities helping organizations adapt to changing external environments. Teams that balance both types of activities are known as ambidextrous teams. Through literature review, it was found that there is knowledge gap in understanding the link between team diversity, performance, and ambidexterity. This thesis tries exploring various diversity factors and its relation to team performance and ambidexterity. Further the thesis investigates if there are any differences in the link between team diversity, performance and ambidexterity based on firm types, that is product vs service-based firms.To find the solution to the link, semi-structured case interviews was conducted. 6 team managers from product-based firms and 4 managers from service-based firms participated in the research. Data from these 10 semi-structured case interviews was analyzed using AtlasTi software and results of qualitative research is presented in the thesis. Various ways in which one can conceptualize diversity, advantages & disadvantages of diversity and its effect on team performance & ambidexterity is presented in this thesis based on the qualitative analysis of semi-structured case interviews.The exploratory study indicates that semi-conductor team mangers conceptualize diversity from both social and information/decision making perspectives. Common surface level diversities such as function, experience, gender etc. were reported. At the same surface level diversities such as working style, task motivation, etc. were reported. The results indicate that teams various diversity factors can lead to divergent thinking and elaboration of task-relevant information thus improving team performance. Some of the reported benefits of diversity include increased knowledge base, better service to customers, better decision making, etc. Realization of diversity benefits is not straightforward; it comes with challenges. Some of these challenges due to diversity include complex team management, increased conflicts, increased time and effort. Thus, it is important for organizations to provide necessary support and environment for reaping the benefits from diversity. Such organizational control is more in terms of structures of teams in case of product-based firms; structural decisions drive ambidexterity and division could take place based on diversity types such as functional diversity, experience diversity etc. However, decentralized structures and informalization of non-routine activities in firms can enable better exploration. And diversity types such as experience, function or skills act as deciding factors in determining extent of structural decentralization and informalization of non-routine activities. Decentralization of non-routine activities can thus enable ambidexterity. Contrary to product-based firm, all the service-based firms reported that employees need to have skills and abilities to capture customer needs and deliver them on time. Therefore, it is evident that all the employees in service-based firms could be involved in exploration. Thus, naturally the employees in service organizations are involved in both the types of activities. Diversities such as skill and working style can thus enable contextual ambidexterity in service-based firms by enabling employees to serve customers better.Management of Technology (MoT
Studies on Alpha Glucosidase Enzyme Inhibitors and its Production from Fungal Sources.
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Effects of non-foaming WMA additives on asphalt binders at high performance temperatures
No full textPreparation of Ready to Eat Product from Pigmented Rice
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
Implementación del grano de caucho reciclado (GCR) proveniente de llantas usadas para mejorar las mezclas asfálticas y garantizar pavimentos sostenibles en Bogotá
No full textEste documento sintetiza diferentes investigaciones a nivel internacional donde se demuestra que la implementación del GCR en los pavimentos es una alternativa para solucionar problemas de tipo mecánico en los pavimentos y mitigar impactos ambientales que genera el mal manejo de las llantas deshechas.
La adición de GCR para la modificación de las mezclas asfálticas, se traduce en una gran cantidad de beneficios, debido a las investigaciones que se han avanzado en los últimos años, han demostrado que este tipo de modificaciones son más durables con respecto a las convencionales, económicas a largo plazo pues se disminuyen los mantenimientos y aumenta su durabilidad, además contribuyen a la reducción de impactos negativos para el medio ambiente como lo son, la quema indiscriminada de las llantas desechadas dando paso a las emisiones de CO2, uno de los gases tóxicos más contaminantes del mundo causantes del calentamiento global, entre otros.
Con base en una revisión bibliográfica, el presente trabajo resume las ventajas y desventajas técnicas, económicas y ambientales que se obtienen al hacer uso del grano de caucho reciclado para mejorar las mezclas asfálticas.This document synthesizes different researches at an international level where it is shown that the implementation of the GCR in the pavements is an alternative to solve problems of structural type in the pavements and to mitigate environmental impacts generated by the mismanagement of the disused tires. The addition of GCR for the modification of asphalt mixtures results in a great number of benefits, due to the research that has advanced in the last years, identifying that this type of modifications are more durable with respect to conventional, long term Term because it reduces the maintenance and increases its durability and mainly contribute to the reduction of negative impacts for the environment as they are, the indiscriminate burning of discarded tires giving way to CO2 emissions, one of the most polluting toxic gases Of the world causing global warming. Based on a bibliographical review, this paper summarizes the technical, economic and environmental advantages and disadvantages of using recycled rubber grain to improve asphalt mixtures.Ingeniero CivilPregrad
Análisis monótonico de mezclas densas en caliente con asfalto modificado con 50% de caucho y 50% de cuero
No full textTrabajo de InvestigaciónLas Mezclas Asfálticas Densas en Caliente, empleadas actualmente para la pavimentación de las vías en Colombia, son mecanismos que están generando un impacto ambiental negativo debido a la utilización de los materiales pétreos, los cuales debido a su ubicación no cumplen con las especificaciones técnicas o son de difícil acceso en algunas zonas de nuestro país. Es por ello que estudios realizados han demostrado que las fabricaciones de mezclas con asfalto convencional no han sido suficientes para soportar la acción del tránsito y el clima; por lo tanto, se ha recomendado emplear modificadores o aditivos en las mezclas, con el fin de mejorar las características o propiedades reológicas tanto del cemento asfáltico como de las mezclas asfálticas. Estos materiales estudiados son desechos no biodegradables que afectan notablemente el ambiente a nivel mundial. Por lo anterior se ve la necesidad de analizar tecnologías de modificación de mezclas asfálticas practicadas en Colombia, con el fin de analizar el comportamiento químico y reológico con el asfalto y materiales pétreos empleados para la fabricación de mezclas asfálticas.PregradoIngeniero CivilINTRODUCCION 1. GENERALIDADES 2. ASFALTOS MODIFICADOS 3. MATERIAL GRANULAR 4. MEZCLAS ASFÁLTICAS 5. FASE EXPERIMENTAL 6. ANALISIS DE RESULTADOS 7. CONCLUSIONES 8. RECOMENDACIONES BIBLIOGRAFIA ANEXO
