The removal of xylene vapors was studied in a biofilter packed with a new hybrid (scoria/compost) packing material at various inlet loads (IL) and empty bed residence times (EBRT) of 90, 60, and 40s. The best performance was observed for EBRT of 90s, where a removal efficiency of 98% was obtained under steady state condition for inlet xylene concentration of 1.34 g m(-3), while a maximum elimin...

Steel-fiber-reinforced scoria aggregate concrete (SFSAC), which contains and steel fiber, was developed to reduce the environmental impacts improve energy efficiency of buildings. Experimental studies were performed. The test variables included fiber volume contents (0%, 0.5%, 1.0%, 1.5%), freeze-thaw cycles (0 25 times), temperature (20 °C, 200 400 600 800 °C). Mass loss, relative dynamic elas...

The Azores archipelago is a small and remote region with low population levels where the issues of sustainability and autonomy have a lways been important and present s ignif icant economic consequences. Currently, the construction industry uses many imported products; however, masonry products are almost exclusively provided by local industries. For its production, masonry uses a natural volca...

Vegetation succession on Mt Tarawera, Rotorua, New Zealand, a recently erupted volcano, was studied. Field data from 70 plots were collected and analysed by a clustering algorithm. The plots formed an altitudinal and successional series which included bare scoria, herbfield, mixed hardwood, scrub, kamahi forest and tawa forest. Because of the differential effects of the 1886 eruption, different...

How might a volcanic material imaginary — particularly of the basalt scoria field that underlies Tāmaki Makaurau / Auckland in Aotearoa New Zealand provide ways for people to see themselves collectively? Our surroundings shape sense identity, and spatial interactions organize our experience city. ’Scoria Field’ is design research inquiry into place-making; investigating potential experiences la...

In different regions across the globe, elevated arsenic contents in the groundwater constitute a major health problem. In this work, a biopolymer chitosan has been blended with volcanic rocks (red scoria and pumice) for arsenic (V) removal. The effect of three blending ratios of chitosan and volcanic rocks (1:2, 1:5 and 1:10) on arsenic removal has been studied. The optimal blending ratio was 1...

Usability of scoria waste as subbase stabilization material was investigated. Initially, the physical properties were examined. The usage in layer pavement In study, experimental researches such stability to freeze, solidity, strength, Atterberg limits and California Bearing Ratio tests carried out on samples prepared by using waste. Scoria natural quarry materials blended different amounts pro...

The reversed paleomagnetic direction of the Laschamp and Olby flows represents a specific feature of the geomagnetic field. This is supported by paleomagnetic evidence, showing that the same anomalous direction was recorded at several distinct sites, including scoria of the Laschamp volcano. To examine this anomalous geomagnetic fluctuation; we studied the paleointensity of the Laschamp and Olb...