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2759 Uppsatser om Construction materials - Sida 22 av 184
Mineraliska material som reaktiva filter för avskiljning av tungmetaller från dagvatten
Highly polluted urban storm water from e.g. highways can contain large amounts of heavy metals that may cause harm if they are discharged into recipients. To remove the heavy metals a possible low-cost method that does not require much maintenance, could be the use of reactive filters with filter materials consisting of industrial residues or other cheap mineral based materials. Dissolved metal ions are removed by reactive filters through the processes of ions binding to active sites on the surface of the filter materials, or by formation of insoluble precipitates.The ability of CaO-treated granulated blast-furnace slag, iron oxide coated sand, olivine and nepheline to remove seven heavy metals (Cr, Cd, Cu, Ni, Zn, Pb and Hg) from urban storm water was studied. Initially batch experiments were performed where the effect of pH, dissolved organic carbon (DOC) and dissolved ions on the adsorption efficiency was studied.
Miljöinformation i förvaltningsberättelsen :
The first of May 2005 changes were made in the Annual Accounts Act. The 2006 Annual Report of companies with more than ten employees or assets over 24 million SEK must include environmental information in the directors' report if it affects the company's development, result or position. A survey made by KPMG 2007 investigating the environmental information of companies listed on Large Cap Segment of the OMX Stockholm exchange showed that only a third of the companies, included in the survey, complied with the new law requirements.
I have examined how the environmental information in the directors' report is formulated and why the information is formulated in that fashion. I have examined seven companies listed on the Large Cap Segment of the OMX Stockholm exchange. Four companies from the materials sector and three banks from the financials sector were included in the survey.
Industrialiserat byggande
The industrialization of construction is increasing in Sweden which leads to higher demands of prefabricated components and cells. But what does the business of construction think of the industrialized business and what can be done in order to decrease faults and errors with these products? Today we have many manufacturers who have different technical solutions which might lead to difficulties when assembling components and cells at the building site. But by trying to make a more opened market, with possibly standardized connections details and improving the communication between the different participants, the prefabricated components and cells can be made and assembled with less errors. This is something that needs to be done in order to establish a more secure business, and especially when working with new companies and methods, when using industrialized products..
Bakhjulsupphängning, fyrhjuling
Highland Group AB was helping a customer of theirs to create an All-Terrain Vehicle (ATV), a project Highland has never been involved with before. For the wishbone arms of the wheel suspension, traditional manufacturing methods and tubes with cylindrical or square shaped cross section was preferred. We performed a simulation where the ATV was driving on a bumpy road too see the forces involved. With the results we proceeded to calculate the strength of the concepts to find out which is best suited for the tough environment in which the ATV is used. The concept that turned out to be the best was a wishbone made of circular cross section, which had good structural strength and did fulfill the demands that we required for the construction.
Produktionsanpassad tvärkraftsarmering för betongplattor
AbstractThe project "Sound and Play" have been implemented in collaboration with the toy company BRIO in Malmo. The purpose of the project was to examine whether and how BRIO in the future could develop toys around sound for Toddlers.The problem formulations that would be answered after completion of the project was "How could BRIO broaden its product range with the help of audio toys?", "How can you combine toys and sounds in an interesting way for children?", "How do you create a toy with sound that is fun for the child, but not annoying for parents?". Currently BRIO only has two toys with sound in this age group.The expression of the toy was going to be a mix of classic and cool and the overall feeling of the toy was going to be explorative and arouse curiosity in the child. This feeling would be communicated through simplicity and joy.
Betongarbeten under vintertid : Fokusering på platsgjuten betong
This report is on concrete work during the winter and is implemented on Peab?s behalf. The assignment was to describe the differences between a summer- and a winter casting. While it shows the complications that exists, it also show what aids are available, both electronic via computer and physical aids.The information that I have developed is originally from theory in books, information on the internet as well as practical experience from knowledgeable people that works in construction output. Other theories are those I have learned throughout the education to become a construction engineer, including all oral sources over the years.The results I have come up with, I hope will be able to help future construction projects in the planning phase of a winter casting.
Att konstruera en gemenskap -teori och konstruktion av virtuella samhällen
Virtual communities are a phenomenon that is becoming more
common as the information technology comes with in reach for
the general public. This report will bring the theories and
construction of a virtual community together.
The purpose of this report is to describe the different theories that have
emerged from the research within this field and to examine the work procedures
that have been used during the development of a site for a MDA-community. The
MDA-website is a homepage on the Internet that was developed to bring the
students closer together. The report describes the work of the project group,
why the website was not completed and at the end the theories are looked at on
the basis of the construction of the website..
Fjortisgrubbel och tonårskärlek : ? en genusstudie av två svenska ungdomsfilmer gjorda med 35 års mellanrum
AbstractHeadline: Young trouble and teenage love (Fjortisgrubbel och tonårskärlek)Number of pages: 37Author: Annika IlmoniTutor: Amelie HössjerCourse: Media and communication CPeriod: Autumn 2007University: Division of Media and Communication, Department of Information Science, Uppsala UniversityPurpose/aim: The purpose of the work was to produce a comparing study of two Swedish teenage films from different periods of time, 1970 and 2005. An analysis was to be made of how love between teenagers as well as the heterosexual relationship in general was depicted in each of the films and further investigate the gender construction in both films.Material/method: With the intention of narrowing down the complexity and make the evaluation more lucid 5 scenes from each film were used for comparison, these were chosen through the Anglo Saxon dramaturgy. To make the scenes more comparable 4 factors were used for analysis in each scene, these were: clothes, recreational activities, behaviour and environment. Beside the above given factors the heterosexual relationship were analysed and compared in each of the scenes through the theory of dominance in dialogue.Main results: The gender construction occurs obliviously in the older film from 1970 while taking place in a more conscious way in the film from 2005. Further on the heterosexual relationship is perpetually depicted in the 70?s film with a submissive girl and predominant boy, the same dominance is easily seen in the more recent film but with a higher rate of equality as the girl is portrayed as the dominant character in almost half of all scenes.
Morgondagens arbetsledare
There is a lot going on in the construction business right now. It feels like everywhere you turn there is a building sight. Furthermore the business is heading a generation change and the need of recruiting new construction engineers is huge. How is the business going to handle the transition that they are facing? The question has been in progress for at while and I wanted to find out what the current students feel about taking the step into the working life and replace the veterans.A research is made about student?s opinion about their education and future work life.
Konceptbyggande med standardelement
Syftet med examensarbetet är att hjälpa ett företag med att införa standardlittera för deras prefabricerade betongelement som ingår i deras Konceptet. Införandet av standardlittera ska resultera till att återfinna och gruppera deras betongelement i CAD-systemen. We did our thesis project at one of the most prestigious Swedish construction companies. We have examined the possibilities of doing sandwich elements to standard elements which would increase the degree of industrialization. The company has developed a concept that is based on a more refined process of industrialization.
Implementering av Last Planner: en studie av byggprojektet
Flotab
Sammanfattning Detta arbete beskriver de studier som utförts vid implementering av Last Planner planeringsmetod, i projektet att bygga LKAB:s flotationsanläggning i Svappavaara. Studien har bedrivits vid institutionen för Samhällsbyggnad i Luleå och LKAB:s malmförädlingsverk i Svappavaara. Arbetet inleder med en granskning av litteratur om teorier och grundtankar om Lean Construction. Filosofin bakom Lean Construction bygger på att avlägsna alla processer som inte skapar mervärde för kunden. Tankegångarna kommer från den Japanska bilindustrin och då främst från Toyotas framgångsrika produktionssystem TPS.
En villaleverantörs möjlighet till etablering i Finland : analys av för- och nackdelar
The construction market has, as a result of the crisis in Europe been uncertain in recent years. During the year 2013, the construction will be stabilized, in particular Finland. The geographical proximity between Sweden and Finland and similarities in cultures and climates makes Finland a coveted market for many Swedish companies.Differences in national regulations and guidelines, which are produced by the authorities in different countries, are examples of barriers that may hamper the process, including for Swedish villa suppliers, to establish themselves on the Finnish market. It may be useful when facing a new export drive, to look up what similarities and differences there are between the countries building codes, to prevent mistakes and unnecessary costs to the project work..
Building Information Modeling : En möjlig modern arbetsmetod för Sweco Theorells AB
To challenge the competition within the construction business there are requirements ineffectiveness and use of operating computer based programs and work-methods. Thecomputer based programs are continuously improved and can at some point be the start of anew work-method. The work-method of tomorrow can be Building Information Modeling(BIM).This Master of Science Thesis gives an understanding in what BIM is and what therequirements for Sweco Theorells are in a future BIM-use as a consulting-firm. Theunderstanding is presented through a study of theory within the subject. The way of thinkingand acting among different disciplines and individuals within the building process isexplained through an interview study.The term BIM is regularly used.
Utvärdering av miljöarbetet vid nybyggnad av butik : miljöledning och avfallshantering
According to recent statistics the construction industry is responsible for the largest waste discharges of both dangerous and non-dangerous waste, when disregarding the "non-dangerous" amount of granite waste produced by the mining industry and the waste produced by the pulp and paper industry. Preventive work within waste management is an ongoing practice so to be able to reduce negative environmental effects. One of the most common actions for the companies to take is to separate the different kinds of waste from one another at the construction site. Although by working with the problem in earlier stages of the process a large amount of the waste could already have been reduced.Companies in the construction business that are actively working to decrease environmental impact in their operations often use an EMS (Environmental Management System). By using environmental management as method the company can manage their environmental work so that actions can be taken where they are needed the most.
Riskhantering i vägprojekt : Effekt, nytta och förbättringar
The aim with this thesis is to study the risk management in construction projects at the Swedish Road Administration, SRA. Furthermore, the aim is to find the effects of the risk management. The theorem of this thesis is that the positive effects of the risk management in construction projects create additional value to the project. These additional values are that the project itself becomes resilient and that the project goals are achieved without any significant disturbances.This thesis shows that the risk management in construction projects do not follow the guidelines set out by the SRA. This is due to a lack of education in the method and a difficult method all together.