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Effect of volcanic ash on the properties of cement paste and mortar
- Siddique, Rafat
- Resources, conservation, and recycling 2011 v.56 no.1 pp. 66-70
- cement, concrete, electrical resistance, fly ash, glass, recycling, silica, volcanic ash
- Volcanic ash (VA) is formed during volcanic eruptions. Volcanic glass is relatively high in silica, and its physical and chemical properties could be referenced with ASTM C618-93, a Standard Specification for ‘Fly Ash and Raw or Calcinated Natural Pozzolan for Use as a Mineral Admixture in Portland Cement Concrete’. This paper presents comprehensive details of the physical, chemical properties of volcanic ash, and its micro-structure and hydration products. It also covers effect of volcanic ash on consistency, setting times, workability, compressive strength, electrical resistivity of cement paste and mortar.