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| Rosato,Vilma G.. |
| Lichens can affect buildings and monuments inducing a negative aesthetical impact as well as causing deterioration through mechanical and chemical processes. Given that cement mortars and concrete are the primary 20th century building materials worldwide, it is important to study lichens growing on this substrate. In a survey of different localities of Buenos Aires Province, 33 species growing on mortars and concrete were collected and identified utilizing morphological and chemical studies. Results showed that Staurothele frustulenta is a new record for Argentina, and Acarospora subcastanea is a new record for Buenos Aires Province. A high number of foliose lichens (15 species) were registered. Some species were previously only known on tree barks, but in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lichens; Mortar; Concrete; Buenos Aires; Argentina. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932006000100008 |
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| Tolêdo Filho,Romildo Dias; Joseph,Kuruvilla; Ghavami,Khosrow; England,George Leslie. |
| ABSTRACT The inclusion of fibre reinforcement in concrete, mortar and cement paste can enhance many of the engineering properties of the basic materials, such as fracture toughness, flexural strength and resistance to fatigue, impact, thermal shock and spalling. In recent years, a great deal of interest has been created worldwide on the potential applications of natural fibre reinforced, cement based composites. Investigations have been carried out in many countries on various mechanical properties, physical performance and durability of cement based matrices reinforced with naturally occurring fibres including sisal, coconut, jute, bamboo and wood fibres. These fibres have always been considered promising as reinforcement of cement based matrices because... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Composite material; Natural fibres; Concrete; Mortar; Strength; Stiffness; Durability. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43661999000200245 |
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