Browsing by Author "Martins, Ana Isabel G."
Now showing 1 - 5 of 5
Results Per Page
Sort Options
- Avaliação da introdução de resíduo da indústria têxtil em argamassasPublication . Pereira, Cristiana Gonilho; Martins, Ana Isabel G.; Faria, Paulina; Fangueiro, RaulO setor têxtil produz uma grande quantidade de resíduos de natureza fibrosa e, embora a sua utilização na construção seja hoje uma realidade, a acumulação destes resíduos em aterros sanitários continua a ser uma preocupação. Tendo em vista o desenvolvimento sustentável, através da diminuição da acumulação destes resíduos e da promoção da sua reutilização, apresenta-se o desenvolvimento da aplicação de resíduos fibrosos com aplicação técnica, na construção. Este artigo apresenta a caracterização de argamassas de cimento reforçadas com fibras resultantes da indústria têxtil e pretende demonstrar a influência da dosagem de fibras no desempenho das argamassas.
- Cement based fiber-reinforced mortar: the fiber influence on the mortar performancePublication . Pereira, Cristiana Gonilho; Faria, Paulina; Fangueiro, Raul; Vinagre, Pedro; Martins, Ana Isabel G.
- Influence of curing conditions on lime and lime-metakaolin mortarsPublication . Faria, Paulina; Martins, Ana Isabel G.Air-lime mortars with or without pozzolanic components were largely used in historic buildings. Due to natural or accidental degradation it is often necessary the application of repair mortars, durable and compatible with the masonries of historic buildings. Within this context and associating the improvement of mortars characteristics to the necessity of sustainable construction practices, some mortars formulated with lime and the addition of pozzolans have been studied. In previous papers, the influence of some types of air-lime (powder hydrated lime or lime putty) and the addition of metakaolin in lime mortars have been presented. Each type of mortar presents its specificities. In pure lime mortars the setting occurs by carbonation and in lime-metakaolin mortars it occurs both by carbonation and hydration. A crucial question in order to optimize the characteristics of the mortars (and its applicability) is related with the curing conditions. This article describes an experimental campaign with different pure air lime mortars and lime-metakaolin mortars, cured under different conditions of relative humidity and CO2 content. Properties of the mortars, mainly in terms of mechanical behaviour and open porosity, capillary water absorption and drying capacity, are obtained, compared and discussed. The benefits in some properties revealed by the different mortars are correlated with the laboratorial curing conditions and with in situ applications possibilities.
- Performance assessment of waste fiber-reinforced mortarPublication . Pereira, C. Gonilho; Faria, P.; Fangueiro, R.; Martins, Ana Isabel G.; Vinagre, P.; Ratão, S.In this paper an experimental work is presented which main objective is the evaluation of the influence of different percentages of waste fibrous materials usage on the performance of fiberreinforced mortars. Moreover, the influence of binder type is evaluated. Therefore mortars were produced with two different binders – cement and powder hydrated lime. Mortars performance evaluation was carried out through flow table and plunger penetration consistency, dynamic modulus of elasticity, flexural and compressive strength, capillary absorption, drying index and adherence tests. The benefits revealed in some characteristics of both mortars by the use of waste fibers are discussed.
- Textile waste fiber-reinforced mortar: performance evaluationPublication . Pereira, Cristiana Gonilho; Martins, Ana Isabel G.; Faria, Paulina; Fangueiro, Raul