CTM - Comunicações em actas de encontros científicos internacionais
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- Natural Stones from Portugal : Proposal for harmonizing Commercial NamesPublication . Carvalho, Jorge; Carvalho, Cristina Isabel Paulo; Lopes, Luis; Silva, António; Santos, Catarina; Sousa, Luís; Martins, Ruben; Marques, CéliaABSTRACT: Over the years, the Portuguese Geological Survey – LNEG, has been dedicated to the characterization of Portuguese natural stones. Today, a newly updated LNEG web portal contains information on 149 natural stones, which are known by their unique trade names. Many of these names integrate the EN 12440 - Natural Stone - Denomination Criteria standard, but others do not. Furthermore, there many other names used to identify natural stones that are traded today and that do not integrate the LNEG web Portal or the EN 12440. This work presents a harmonization proposal for the commercial denomination of the Portuguese natural stones. It is a working basis for a final list that must be submitted to ISO/Technical Committee 118 – Natural Stones.
- House dusts of a volcanic island: potential impacts on human healthPublication . Candeias, Carla; Ávila, Paula Freire; Cunha, Leandro; Sequeira, Cristina; Rocha, FernandoABSTRACT: Fogo island (Cape Verde), has an active volcano that last erupted in 2014-15, with melts mainly alkaline, of basanitic to tephritic composition. Dwellings dust composition is the result of natural and anthropogenic interactions. Nineteen house dusts were collected, in representative dwellings all over the island. Fractions < 2 mm was analyzed by ICP-MS, XRF and XRD and SEM for chemical, mineralogical, and morphological characterization. Mineral phases revealed several minerals linked to the volcanic origin. Iron mean concentration in soils, is above the 2014-105 eruption lava mean. Potentially toxic elements were below Acceptable Values (AV), e.g., As 0.6 to 3.3 mg/kg, except once sample 111 mg/kg (AV = 20 mg/kg); Cd, 0,5-3.6 mg/kg (AV = 3 mg/kg). Elements Ni and V presented concentrations above AV in all samples. But is Ti with concentrations much above AV. Risk assessment (USEPA) found As and Ni over the car cinogenic target Risk in most samples, while systemic toxicity in children is mostly due to Fe, V and Zr concentrations. Higher particles concentration is > 50 µm in diameter, suggesting that bioaccessible fraction might not be high, thus, reducing risk.
- "Schistose" rocks as a resourcePublication . Noronha, Fernando; Sousa, Mónica; Carvalho, Cristina Isabel Paulo; Moura, A. Casal; Ramos, João Farinha
- Natural stone from the Azores archipelago : relationship between lithology and physical-mechanical behaviourPublication . Silva, João B. P.; Carvalho, Cristina Isabel Paulo; Caetano, Sérgio Diogo; Gomes, Celso
- Stains in pavement applications of a portuguese limestonePublication . Simão, J.; Pires, Vera; Galhano, António Carlos; Carvalho, Cristina Isabel Paulo
- Trabalho isolado. Um fator subestimado na prevençãoPublication . Matos, Maria Luísa Ferreira; Santos, Paula; Barbosa, Fernando
- Relação entre ruído e vibração produzidos por equipamentos de pedreiraPublication . Cerdeira, João; Matos, Maria Luísa Ferreira; Baptista, João Santos
- Whole-body vibration in drilling, loading and transport operations in quarryPublication . Bernardo, C.; Matos, Maria Luísa Ferreira; Baptista, João Santos
- Whole-body vibration in open pit mining - a short reviewPublication . Bernardo, C.; Matos, Maria Luísa Ferreira; Baptista, João Santos
- Patterns of whole-body vibrations in open pit miningPublication . Bernardo, C.; Matos, Maria Luísa Ferreira; Baptista, João Santos