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269 Uppsatser om Alkali silica reaction (ASR) - Sida 4 av 18
Tryckhållfasthet för resurssnål betong : Utvärdering i tävling av högsta tryckhållfasthet för resurssnål betong
Betong är vårt vanligaste byggmaterial men cement står globalt sett för 5 % av CO2-emissionerna. Med detta som bakgrund så har CBI Betonginstitutet anordnat en tävling, där målet är att nå den högsta tryckhållfasthet i en resurssnål betong, med enbart 200 kg cement per m3. Syftet med denna rapport är att utvärdera tävlingen, vilket har utförts genom en omfattande litteraturstudie. En första analys av de olika betongrecepten medförde att olika grupperingar kunde urskiljas. Ur dessa fanns det tre stycken vars resultat var väldigt bra. ? Concrete Innovation Centre, som med ett lågt vct, stora mängder granulerad masugnsslagg (81 %) och lite silikastoft (5 %), uppnådde en tryckhållfasthet på 80 MPa vid 28 dygn och 95 MPa vid 56 dygn. ? CBI Stockholm, som genom användandet av ulltrafint filler och silikastoft (4,8 %), uppnådde en tryckhållfasthet på 84 MPa vid 28 dygn och 98 MPa vid 56 dygn. ? Thomas Concrete Group som genom att ersätta cementet med en medelmåttig mängd granulerad masugnsslagg (54 %), liten mängd flygaska (9 %), kalkfiller och silikastoft (5 %), uppnådde en tryckhållfasthet på 94 MPa vid 28 dygn och 98 MPa vid 56 dygn. Det finns således tre recept som vidare studier kan vara rättfärdigade på, de tre ovan nämnda. Det bör tilläggas att en imponerande tryckhållfasthet på nästan 100 MPa, kan uppnås i en betong med enbart 200 kg cement per m3. .
Talet och tystnaden : en studie av samhällsstrukturer och begär i Sarah Kanes "Phaedra's Love"
This essay is an introduction to the intentions and purposes of the british play writer Sarah Kane (1971-1999). Her own voice is presented both via quotations linked to her work and by an explanation of her connections to the surrealist poet and actor Antonin Artaud. The main focus is on Kane?s second play, Phaedra?s Love, first performed in 1996. The play is analyzed in co-relation to La volonté de savoir, the first volume in Michel Foucault?s trilogy Histoire de la sexualité.
Kemin bakom framtidens avgasrening : En studie av ureasönderfall under kvävgasatmosfär
The purpose of this work was to provide a better understanding of urea?s decomposition and byproduct formation in an SCR system on heavy trucks. In my experimental setup with TGA-DSC-FTIR (a combination of two thermal analysis methods and a method for gas phase detection), an FTIR method for urea in the gas phase was developed for the qualitative and quantitative determination of urea and its decomposition products. Chemicals such as urea, biuret, cyanuric acid and melamine of p.a. quality were used in this method development. Beforehand, there was no FTIR method available to detect these substances; hence, the aim of this work was to develop an FTIR method to understand the degradation chain of urea. The combination of TGA and DSC was used for analysis of different samples, where urea, biuret, cyanuric acid and melamine in varying amounts have been weighted in for various experiments in order to study the temperature at which a phase transition or reaction occurs, i.e.
Att mäta fattigdomsbekämpning - En studie av social performance-rapportering inom mikrofinans
This study has a double purpose. First, it explores and maps out the use of quantitative key indicators in social performance reporting within a microfinance portfolio. This was done on behalf of Storebrand Asset Management, who would like to aggregate and report the social results of their microfinance investments to their customers. The study concludes that the extent of social reporting and types of indicators used varies, meaning that it is hard to aggregate data for use in further reporting. Thus, the work towards the goal of social reporting has only just begun.
Klingner för Masthugget Folkkyrkotankens roll för utvecklingen i Masthugget under 1904?1936
The early 20th century saw the Church of Sweden (Svenska kyrkan) come under threat from the modernization of the Swedish society. As a reaction to this and a way to secure the survival of the church a number theologians came up with a theological framework for the folk church (folkkyrkotanken).The parish of Masthugget was one of the poorest in the entire diocese of Gothenburg in the beginning of the 20th century. This is where Gottfrid Klingner came to serve first as a pastor and later as the vicar for more than 30 years. In which way did his view on the church affect life for the inhabitants in his parish and how were his actions affected by the framework for the folk church? This paper shows that the practice of Klingner in Masthugget can be linked to many of the ideas associated to the folk church concept..
Kan Lamotrigin utgöra ett Behandlingsalternativ vid Bipolär Sjukdom?
Bipolar disorder is a severe, affective illness which causes a person to alternate between episodes of pathologically elevated mood (mania) and depression ? in between these episodes the mood is normal. The length and intervals between the episodes are highly variable among the ill, as are the severity which is divided into two major subgroups: bipolar I and II. Bipolar I disorder is the most severe because of the patient?s inability to realize that he or she is currently in a manic phase, in the case of bipolar II disorder, the patient is aware that he or she has an abnormally raised mood, a state which is called hypomanic state instead of manic.
Smittsamma hudsjukdomar hos hund :
This student report is about canine infectious skin diseases. It is primarily directed at veterinary assistans.
The report includes a description of the skin?s structure and immunologic defences. The four types of allergic reactions are described. Different diagnostic techniques are also accounted for.
The skin diseases included in the report are: fleas, lice, Sarcoptes scabiei, ringworm, Cheyletiella and leishmaniosis.
Automobike: en cykel med aktiv balans
During spring 2012, six students at the Royal Institute of Technology in Stockholm carried out agroup project in the field of mechatronics as part of the thesis for the bachelor degree. The resultwas a robot with active balancing and the purpose of this report is to describe the development,manufacturing and problems that arose during the project. The finished robot has two wheelsmounted in line with each other, like a bicycle. Measurement data from an accelerometer and agyroscope are used together in a complementary filter for determining the angle from the verticalplane. For balancing, a PID controller was used to control the rotation of a reaction wheel, whenaccelerating causes a straightening torque.
Elektrolytisk reduktion av zink vid reningsprocess
When cylinders for motor saws are manufactured there are high demands on the cylinders strength and wearing qualities. Aluminum is a material with low density and is used by Husqvarna AB for their motor saw cylinders. The aluminum is strengthening with nickel that is attached to the cylinders through electrolysis. When aluminum is in contact with oxygen a film of oxide is formed. To eliminate the oxide and to prevent formation of new oxide zinc is used.
Medias bild av incitamentsprogram - har publicerade artiklar en påverkan på aktiemarknaden?
This study examines how the stock prices are affected when articles, which negatively describe the companies? incentive programs, are published. According to the efficient market hypothesis, only new information should have an effect on the stock price. Furthermore, this study aims to examine whether this reaction is dependent of the economic climate. During the period of September 2005 to September 2009, stock price data was collected from the NasdaqOMX stock exchange and 75 articles were gathered from leading Swedish newspapers.
Återfjädring vid bockning av höghållfast stål
Svenska Aerogel AB has developed the material Quartzene® which is of the typeprecipitated silica and contains calcium - magnesium silicate ((Ca, Mg) SiO3). Thematerial is used for molecular filtration of contaminated air. Qartzene?, which is inpellet form, is porous and has a high internal surface which is a requirement for themolecular filtration. With the use of various impregnations, filtration can affect thedesired outcome.
Fuktegenskaper hos Quartzene impregnerat med salter
Svenska Aerogel AB has developed the material Quartzene® which is of the typeprecipitated silica and contains calcium - magnesium silicate ((Ca, Mg) SiO3). Thematerial is used for molecular filtration of contaminated air. Qartzene?, which is inpellet form, is porous and has a high internal surface which is a requirement for themolecular filtration. With the use of various impregnations, filtration can affect thedesired outcome.
Varumärkespersonlighetens betydelse i köpprocessen- En studie om hur konsumeter resonerar vid köp
ABSTRACTThe purpose of this essay is to investigate possible questions generated by theperformance/installation Har hon inget vettigare att göra? Du då. Har du inget annat att hitta på än att ståoch glo på henne? by the artist Elin Wikström. The Constructed Situation invites the spectator to be apart of a continuing process of thought.The subjective feeling makes an important insight to the work through methods of the aestheticsand the performative., mainly from Margaretha Rossholm Lagerlöf.
Att döda en mansnorm : Att döda en mansnormJakten ur ett genusperspektiv -den kvinnliga jägaren i den manliga jaktkulturen
Hunting is considered as the most masculine activity in our society. Historically, man has been described as the provider for his family, this in the forms of hunting and gathering. Today hunting is still associated with a male hunter, but women have started to infiltrate the hunting culture. In this study hunting culture is analyzed with a gender perspective. In a modern society with gender and equality as a big subject of debate it is interesting to examine this impact on a culture so linked with masculinity.
Agila metoder ? en kartläggning av teori och praktik
In recent years, agile software development methods have become increasingly popular throughout the world. Today there are a number of different agile methods and they all rest on the Agile Manifesto that was formulated in 2001 as a reaction to the traditional software processes.The aim of this thesis is to make a survey of some of the agile methods used today and to see how they are being used in practice. It consists of two parts: a literature study and an interview study with people working in the software business. First, a definition of agile methods is proposed and a number of different agile methods are described. Second, the interviews are being analysed with special focus on communication, collaboration, expectations and results.