O trabalho propõe uma metodologia de produção de contra pisos para edifícios residenciais e comerciais, envolvendo a dosagem racional da argamassa, a técnica de execução e as diretrizes para a elaboração do projeto e para a implantação do controle da produção. Para isto, realizou-se, uma síntese da evolução do subsistema piso desde o início do século até os dias atuais, abordando uma de suas camadas - o contrapiso, para o qual destacou-se as suas funções e propriedades. Além disto, foram estudadas as características de produção do contrapiso enfocando-se as argamassas, as técnicas de execução e os procedimentos de controle recomendados pela bibliografia. Com base na bibliografia realizou-se um trabalho experimental em canteiros de obra e em laboratório buscando-se conhecer as atuais condições de execução do contrapiso no Brasil, e as fases de produção passíveis de serem alteradas, buscando uma produção racionalizada. O trabalho, após a implantação da metodologia em caráter experimental, conclui com a constatação de que ha uma necessidade premente de desenvolvimento de tecnologias construtivas adequadas a realidade nacional, voltadas a produção de edifícios pelo processo convencional e que tais tecnólogias deverão estar aliadas a elaboração do projeto dos diversos subsistemas do edifício e a implantação de específicos procedimentos de controle do processo de produção. / A brief description of the evolution of the floor sub-system for buildings since the beginning of this century is presented. The layers of the floor are characterized with emphasis on the functions and properties of the screed layer. Based on a literature review, the characteristics of the screed layer are analysed as well as the mix design, production techniques and quality control procedures. The experimental work was carried out both in the laboratory and at the working site in order to know better the present screed layer production conditions in Brazil, aiming to improve them. From the experimental work, a screed production methodology for housing and commercial buildings is proposed and consists of: - the production techniques taking into account the Brazilian conditions; - the floor sub-system design guidelines; - the on-site quality control methodology. This methodology was applied on experimental basis. The conclusion is that the development of building technologies taking into account the actual site conditions is important for improvement of the construction industry in Brazil. Moreover, these technologies must be consistent with the design procedures of the different building sub-systems and also with the procedures of the buildings production control.

O trabalho propõe uma metodologia de produção de contra pisos para edifícios residenciais e comerciais, envolvendo a dosagem racional da argamassa, a técnica de execução e as diretrizes para a elaboração do projeto e para a implantação do controle da produção. Para isto, realizou-se, uma síntese da evolução do subsistema piso desde o início do século até os dias atuais, abordando uma de suas camadas - o contrapiso, para o qual destacou-se as suas funções e propriedades. Além disto, foram estudadas as características de produção do contrapiso enfocando-se as argamassas, as técnicas de execução e os procedimentos de controle recomendados pela bibliografia. Com base na bibliografia realizou-se um trabalho experimental em canteiros de obra e em laboratório buscando-se conhecer as atuais condições de execução do contrapiso no Brasil, e as fases de produção passíveis de serem alteradas, buscando uma produção racionalizada. O trabalho, após a implantação da metodologia em caráter experimental, conclui com a constatação de que ha uma necessidade premente de desenvolvimento de tecnologias construtivas adequadas a realidade nacional, voltadas a produção de edifícios pelo processo convencional e que tais tecnólogias deverão estar aliadas a elaboração do projeto dos diversos subsistemas do edifício e a implantação de específicos procedimentos de controle do processo de produção. / A brief description of the evolution of the floor sub-system for buildings since the beginning of this century is presented. The layers of the floor are characterized with emphasis on the functions and properties of the screed layer. Based on a literature review, the characteristics of the screed layer are analysed as well as the mix design, production techniques and quality control procedures. The experimental work was carried out both in the laboratory and at the working site in order to know better the present screed layer production conditions in Brazil, aiming to improve them. From the experimental work, a screed production methodology for housing and commercial buildings is proposed and consists of: - the production techniques taking into account the Brazilian conditions; - the floor sub-system design guidelines; - the on-site quality control methodology. This methodology was applied on experimental basis. The conclusion is that the development of building technologies taking into account the actual site conditions is important for improvement of the construction industry in Brazil. Moreover, these technologies must be consistent with the design procedures of the different building sub-systems and also with the procedures of the buildings production control.

The diploma thesis is devoted to the comparison of drying processes of various types of poured floor self-levelling screeds under conditions close to construction practice, especially during maturation under different climatic conditions. These properties were observed by several methods. The course of strength increases and final strength of tested materials under different climatic conditions were also found and compared. The conclusion summarizes the knowledge about the course of drying and the course of development of strengthening of individual floor materials.

This thesis aims to optimize self-levelling floor screeds and thin layer screeds based on ternary binder system containing portland cement, calcium aluminate cement and gypsum with intentional ettringite formation. It also studies the influence of designed mixtures, chemical admixtures and aggregate granulometry on achieved technological characteristics required by standard.

This thesis deals with the comparison of volumetric and stress variations in different formulations of cast floor self-leveling screeds during maturation. These changes were measured by several methods. Furthermore, the strength parameters of the test materials were compared. The test specimens were cured in metallic and elastic forms. The microstructure of these samples were monitored by scanning electron microscopy. In conclusion, the suitability of the tested methods for the given type of flooring materials was evaluated.

The work deals with the development of new types of gas and waterproof tight coatings based on secondary crystallization of cement, using industrial waste as secondary raw material in the formulation of new recipes.

The thesis deals with the development of new type of lightweight floors based on secondary raw materials. In the introduction, the current knowledge in the field of lightweight building materials, especially screeds and lightweight porous concrete, is presented. The thesis describes brief history of production of aerated concrete and its development up to the present. Further, the thesis describes the procedure of design and testing of new lightweight materials for use in floors. The proposed recipe has been thoroughly tested and the best combination of components for use in lightweight porous concrete floor screed has been selected. The thesis also examines the microstructure of the material being developed. The main result of the dissertation is the developed product, which is already used in practice and is produced and sold on the market as part of the system of lightweight building materials.

The diploma thesis deals with the study of the influence of composition and curing of self-leveling cement screeds on their properties in the early stage of maturation. Within this work, various concepts of ensuring the volume stability of cement self-leveling screeds were verified. An anti-shrink additive based on neopentyl glycol and an expansion additive based on hard-burnt lime were used as modifiers. The reduction of plastic and overall shrinkage using various types of liquid membrane-forming compounds was verified on the most volume-stable screed using the optical dilatometry method. The effectiveness of the individual solutions was monitored by continuous measurement of the intensity of evaporation from the screed surface. Subsequently, the effect of membrane-forming compounds on the residual moisture of the cured treated cement self-leveling screed was measured by the carbide method and also the effect of this curing on the adhesion of bonded ceramic tiles.

This thesis is focused on development of a new type of lightweight self-levelling floor screed. The aim of this thesis is to develop lightweight screed with self-levelling function, which could be stored in a dry mixture in bags or silos, designed for use with only addition of water.

The thesis deals with the development of self-leveling cement screed with compensated shrinkage. It is a ternary binder system with the majority of portland cement, that in the beginning of setting and hardening form an expandable folder ettringite. At first there was a background research of volume changes of hydrating cement composites and methods for measuring these changes. Various sort of expansion additives were also introduced, the main emphasis was on concepts of calculated formation of ettringite, which are typical for self-leveling underlayment. Background research included the issues of formation of ettringite, influences on it’s nucleation and it’s stability. The practical development of the screed began by measuring volume changes of different pastes on a ternary composition. Selected formulations suitable for use are verified together with additives to semi-application tests. After the final configuration of the screed mixture, there was a test in real application of an representative area. Individual formulations were tested in terms of long-term stability of ettringite in dry and moist environments.