20 documents found, page 1 of 2
Earthen plasters based on illitic soils from Barrocal Region of Algarve: Contri...
Lima, J.; Faria Rodrigues, P.; Santos Silva, A.Clayish earth-based mortars can be considered eco-efficient products for indoor plastering since they can contribute to improve important aspects of building performance and sustainability. Apart from being products with low embodied energy when compared to other types of mortars used for interior plastering, mainly due to the use raw clay as natural binder, earth-based plasters may give a significant contribut...
Evaporation from porous building materials and its cooling potential
Gonçalves, T. D.; Brito, V.; Vidigal, F.; Matias, L.; Faria Rodrigues, P.Evaporative cooling is a traditional strategy to improve summer comfort, which has gained renewed relevance in the context of the transition to a greener economy. Here, the potential for evaporative cooling of common porous building materials, like natural stone and ceramic brick, is evaluated. The work has relevance also to the protection of built heritage because evaporation underlies the problems of dampness...
Physical and chemical assessment of lime–metakaolin mortars: Influence of binde...
Gameiro, A.; Santos Silva, A.; Faria Rodrigues, P.; Grilo, J.; Branco, T.; Veiga, M. R.; Velosa, A.This work evaluates the influence of binder:aggregate ratio on the mineralogical and mechanical properties of air lime–metakaolin mortars. Mineralogical analysis showed that binder:aggregate ratio affects the extent of carbonation and pozzolanic reactions with curing. The pozzolanic reaction occurs mostly at lower curing times (28 days), while, at higher curing ages, carbonation reaction is mostly dominant. The...
Avaliação do desempenho térmico por análise termográfica de tintas refletantes ...
Matias, L.; Gonçalves, M.; Faria Rodrigues, P.Avaliação do desempenho térmico de tintas refletantes aplicadas em células experimentais utilizando termografia de infravermelhos
New natural hydraulic lime mortars – Physical and microstructural properties in...
Grilo, J.; Faria Rodrigues, P.; Veiga, M. R.; Santos Silva, A.; Silva, V.; Velosa, A.The new version of EN 459-1 standard for building limes redefined the classes of hydraulic limes and made the producers reformulate or reclassify their natural hydraulic limes. This work evaluates the mechanical, physical and microstructural behavior of mortars formulated with a recently produced natural hydraulic lime NHL3.5 that conforms to EN 459-1, submitted to natural marine environment, humid and standard...
Mechanical and mineralogical properties of natural hydraulic lime-metakaolin mo...
Grilo, J.; Santos Silva, A.; Faria Rodrigues, P.; Gameiro, A.; Veiga, M. R.; Velosa, A.This paper investigates the mechanical and mineralogical characteristics of natural hydraulic lime NHL3.5 (NHL) mortars with different% of lime replacement by metakaolin (MK) under different laboratory and natural marine curing conditions. Tests were conducted at different curing ages, using compressive and flexural strength tests and thermogravimetric and X-ray diffraction techniques. NHL mortars cured at high...
Avaliação da influência do teor de água na trabalhabilidade de argamassas de terra
Gomes, I.; Gonçalves, T. D.; Faria Rodrigues, P.As argamassas de terra, em que o ligante é a argila, foram comummente utilizadas no passado. Hoje em dia, são normalmente utilizados materiais com base em cimento, inclusive para reparação de paramentos de taipa sem estabilização, levando a resultados menos duráveis e ao aparecimento de anomalias expressivas nas edificações. Não existem estudos relativos à influência do teor de água correlacionando-o com a trab...
Evaluation of Pozzolanic Reactivity of Artificial Pozzolans
Pontes, J.; Santos Silva, A.; Faria Rodrigues, P.Pozzolanicity is a very interesting issue regarding building materials, as a way to enhance mortars and concrete durability. This property results from the reaction between calcium hydroxide and silica and alumina based materials. Different types of natural and artificial pozzolans show pozzolanic activities that differ depending on the materials characteristics. Therefore, the study of this property, namely it...
Consolidação superficial de paredes de taipa com argamassas de terra
Gomes, I.; Gonçalves, T. D.; Faria Rodrigues, P.Atualmente existe um reconhecimento pelas técnicas construtivas em terra crua, que tinham caído em desuso e que ressurgiram com a consciencialização face à sustentabilidade e no sentido de explorar recursos locais reutilizáveis. Este facto deve-se às características particulares do material terra, ecológico, reciclável, de baixo custo, acessível, incombustível e que apresenta um bom contributo para o isolamento...
The compatibility of earth-based repair mortars with rammed earth substrates
Gomes, I.; Gonçalves, T. D.; Faria Rodrigues, P.Earth constructions are susceptible to degradation due to natural or human causes. The degradation of the exterior surface of earth walls is very common, either due to lack of maintenance or to the use of incompatible materials, and often requires the application of a repair mortar. This work experimentally analyses the performance of earth-based repair mortars applied on rammed earth surfaces. The mortars are ...