The objective of this thesis is to examine the difference in Workability in fresh concrete, when crushed fine aggregate replaces natural gravel. The shape of the fine aggregate,  packing and flow of six crushed material and three natural materials will be determined by easy studies, the results will be compared with a slump cone test..

In our thesis we will compare interior walls, both bearing and non-bearing. All of thewalls analyzed are currently used in production by Skanska Construction, who is alsoour employer/supervisor for the project. The different wall types will be comparedfocusing mainly on time, cost and Workability. All of these walls aside from the nonbearingwall are constructed using concrete, either prefabricated or cast on site..

Concrete is one of the world?s most common construction materials and is composed of 70-80 % stone material. Today crushed stone is used as aggregate in concrete in order to replace natural aggregates due to strong environmental reasons. Stone crushing yields flaky material and in this thesis studies are made on the flaky particle shape and how it influence properties of concrete such as Workability, rheology and strength. The concrete recipes used in this thesis have fixed values, the only variable is the flakiness of the crushed stone.

This thesis has been developed inassociation with Strängbetong AB, Sweden.A few years backCementa AB introduced a new type of cement on the Swedish market: Byggcement,which is a Portland Limestone Cement. This type of cement is better for theenvironment and cheaper than Rapid Hardening Cement which is used today at SträngbetongAB.Strängbetong AB isvery interested in a change of cement in the factory and wants to know what ittakes to make a transition from Rapid Hardening Cement to Byggcement.This final projectaims at investigating how the Workability and strength development are affectedby a transition from the existing cement to Byggcement and how we can change theproperties of the concrete by adding different types of superplasticizers. Laboratory and factoryexperiments were made, to investigate the transition..

This thesis has been developed inassociation with Strängbetong AB, Sweden.A few years backCementa AB introduced a new type of cement on the Swedish market: Byggcement,which is a Portland Limestone Cement. This type of cement is better for theenvironment and cheaper than Rapid Hardening Cement which is used today at SträngbetongAB.Strängbetong AB isvery interested in a change of cement in the factory and wants to know what ittakes to make a transition from Rapid Hardening Cement to Byggcement.This final projectaims at investigating how the Workability and strength development are affectedby a transition from the existing cement to Byggcement and how we can change theproperties of the concrete by adding different types of superplasticizers. Laboratory and factoryexperiments were made, to investigate the transition..

Lime Hempcrete consists of lime, water and hemp and creates an insulating, sound-absorbing, lightweight and environmentally friendly material that can be used in wall, roof and floor structures (Bevan & Woolley 2008). This construction method is not yet developed in Sweden as there has been a ban on the cultivation of the hemp plant. This ban on the cultivation of hemp was removed in 2003, when the material got a boost. You can use it in many different ways and not just in the construction industry (Ahlsten, 2010).In this study we have investigated the possibility to produce prefabricated wall elements of LHC. We have also studied its mechanical properties and dehydration time.

This exam report has been developed in association with Strangbetong AB, Sweden.The natural gravel that is being used as fine aggregate for concrete production today is an ending natural recourse and the Swedish government has decided to strongly reduce the extraction from the year of 2020. The only reasonable replacement is aggregates from crushed rocks but this material has other properties than natural aggregates. The concrete manufacturers now have to learn how to use these new fine aggregates in a cost effective way in order to ensure the quality of their concrete production.In this project, crushed aggregates and combination of crushed and natural aggregates have been tested with existing formulas for fresh concrete. The two parameters yield stress and plastic viscosity have been measured which gives a good description of the Workability of the fresh concrete. Different methods to make measurements on the dry fine aggregates, has also been tested, to find out if there is any correlations between these parameters and the parameters from the measurement on the fresh concrete..

   SammanfattningSyftet med denna uppsats var att belysa hur fenomenet friskvård på en arbetsplats uppfattas av enskilda individer och vilken betydelse det kan få med avseende på såväl hälsan som välbefinnandet i stort. Utifrån denna fråga ville vi även se om det fanns skillnader i upplevelser av friskvård i de olika yrkeskategorierna från arbetsledning till arbetstagare. Inställningen till friskvård som prevention på en arbetsplats och vardagsmotion för den enskilde individen är individuell. En del människor varken vill eller tror sig kunna utöva friskvård och håller sig friska ändå. Den empiriska undersökningen bygger på kvalitativ metod.

With the ambitions to rehabilitate individuals with different kinds of work disabilities through work, the government owned Samhall AB has a long history as labour market measure in Sweden.To show Samhall AB its importance, the company has requirements to fulfill the goal that around 5 percent of their employees, at Samhall AB, every year shall be transferred to an employment outside the company, which is called transition. Unfortunately since this goal was introduced it also created several dilemmas. One dilemma is the long lasting female under representation in transitions from Samhall AB to the regular labour market.The essays main task is to investigate the factors behind the female under presentation in transition from Samhall AB through a genus perspective and by using quantitative and qualitative method.The main conclusions are that female under representation in transitions from Samhall AB are basically caused by structural factors. Samhall AB?s strong industrial tradition and particularly the strong segregation between female and males on the regular Swedish labour market may inhibit females in their transitions.