Encontrados 7 documentos, a visualizar página 1 de 1
New trends in concrete-polymer composite materials and systems
Czarnecki, Lech; Garbacz, Andrzej; Knapen, Elke; Aguiar, J. L. Barroso de; Ferreira, Rui Miguel; Gemert, D. vanAppropriate combination of polymers and classical construction materials provides opportunities for innovative applications and systems, for improved performance and for increased durability. Particularly in restoration and retrofitting, polymer based materials highly contribute to sustainable construction activity. This paper highlights the innovations, new approaches and durability assessments, presented at t...
New trends in concrete-polymers composite materials and systems
Gemert, D. van; Aguiar, J. L. Barroso de; Ferreira, Rui Miguel; Knapen, Elke; Garbacz, Andrzej; Czarnecki, LechPolymers, representing 1 % only of building materials used in construction industry, have a major impact on performance of materials and systems due to their synergic action with cementitious materials. Appropriate combination of polymers and classical construction materials provides opportunities for innovative applications and systems, for improved performance and for increased durability. Particularly in res...
Contribution to a ranking procedure for polymeric caotings and hydrophobic agen...
Aguiar, J. L. Barroso de; Moreira, Pedro; Lukowski, Pawel; Czarnecki, Lech; Camões, Aires; Gemert, D. vanOne of the possible ways to protect the concrete is using coatings and hydrophobic agents that act as a barrier against the environment. When selecting the material for concrete protection, importance should be given to these properties of diffusion and permeability. The coatings and the hydrophobic agents must stop the penetration of water and delay the influence of aggressive agents, allowing the structure to...
Feasibility study of geopolymers for externally bonded reinforcement
Figeys, Wine; Gemert, D. van; Aguiar, J. L. Barroso deGeopolymers are a new class cf alumino-silicate materials. Because of their non-inflammability and thermal stability they could present a valuable alternative for epoxy adhesives in extemally bonded reinforcements. Geopolymerisation is a chemical reaction that is processed in strong alkaline environment between the oxides that are present in different alumino-silicates, yielding polymeric Si-O-AI-O bonds. The p...
Advances in adhesion between polymers and concrete
Aguiar, J. L. Barroso de; Gemert, D. vanThe adhesion between polymers and concrete is complex and needs to be studied with adequate methods. One problem is about the best test to determine adhesion strength. The use of traditional tests like direct tension, flexure or shear, normally does not enable the correct determination of the adhesion strength. If the adhesive is good and the substrate’s surfaces are well prepared, the failure is in the substra...
Ranking procedure for polymeric coatings and hydrophobic agents for concrete pr...
Aguiar, J. L. Barroso de; Moreira, Pedro M.; Lukowski, Pawel; Czarnecki, Lech; Camões, Aires; Gemert, D. vanA ranking procedure, developed by Czarnecki and Lukowski, is applied on a series of concrete protection products. The ranking procedure is applied to evaluate durability experiments, carried out on some commercially available silicone, acrylic and epoxy compounds for surface treatment of concrete. The ranking procedure transforms experimental data of properties into one numerical value, by which the products ca...
Evaluation of polymeric coatings and primers against chloride ingress in concrete
Aguiar, J. L. Barroso de; Schueremans, Luc; Moreira, Pedro M.; Camões, Aires; Gemert, D. vanNowadays, it is common knowledge that the biggest degradation of concrete is caused by outside to inside actions. Penetration of moisture, active gases and aggressive ions, as well as mechanical, physical and chemical causes frequently act together. A low porosity and low permeability of concrete to penetration of moisture and gases are the first lines of defence against several deterioration mechanisms. One of...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||