Pozzolana or pozzuolana , also known as pozzolanic ash (Latin: pulvis puteolanus), is a natural siliceous or siliceous-aluminous material which reacts with calcium hydroxide in the presence of water at room temperature (cf. CaO and alkali contents are usually modest but can vary substantially from pozzolana to pozzolana. Although pioneered by the ancient Greeks, it was the Romans that eventually fully developed the potential of lime-pozzolan pastes as binder phase in Roman concrete used for buildings and underwater construction. It resembles surkhi which is prepared by burning bricks made from ordinary soils. plot no 1 , radha nagar, radha nagar, Chennai - 600073, Dist. Most of the traditionally used natural pozzolans belong to this group, i.e., volcanic pumice from Pozzuoli, Santorin earth and the incoherent parts of German trass. The long-term strength of PPC is higher compared to OPC. PPC can be used for the majority of construction projects, such as in the buildings of houses, high-rise buildings and bridges. Chennai, Tamil Nadu, Sriperumbudur, Near Post Office, Sriperumbudur, Chennai - 602105, Dist. This page was last edited on 31 July 2020, at 17:47. The modern definition of pozzolana encompasses any volcanic material (pumice or volcanic ash), predominantly composed of fine volcanic glass, that is used as a pozzolan. Leucite is present in the K-rich, silica-poor Latium pozzolanas. 29a, Arcot Road, Porur, Chennai - 600116, Dist. View Other Cement and Concrete in Chennai, PPC is blended cement produced by adding pozzolanic materials, such as Flyash, Gypsum and calcines clay to clinker. At the basis of the pozzolanic reaction stands a simple acid-base reaction between calcium hydroxide (as Portlandite) and silicic acid. No.100, 15th Cross, Kolathur, Chennai - 600099, Dist. Chennai, Tamil Nadu, radha nagar, Chennai Chennai, Tamil Nadu, ,631,KRISHNA MOORTHY STREET,,THADAPERUMBAKKAM,,Tiruvallu, Ponneri, Chennai - 601204, Dist. Chennai, Tamil Nadu, 88, Mount Road, Guindy, Guindy, Chennai - 600032, Dist. (1986) Natural pozzolanas. While zeolitisation or formation of opal CT is in general beneficial for the pozzolanic activity, clay formation has adverse effects on the performance of lime-pozzolan blends or blended cements. 25, Easwaran Koil Street, Narthampoondi Village, Narthampoondi Village, Chennai - 606802, Dist. Chennai, Tamil Nadu, Thalambur Road, Navallur, OMR Main Road, Chennai - 603103, Dist. [3] Typically it was very thoroughly mixed two-to-one with lime just prior to mixing with water. The designation pozzolana is derived from one of the primary deposits of volcanic ash used by the Romans in Italy, at Pozz… In part due to the exhaustion of the latter sources and the extensive reserves of pozzolana available, partly because of the proven technical advantages of an intelligent use of pozzolana, their use is expected to be strongly expanded in the future.[5]. Basic (45–52 wt% SiO2) and ultrabasic (<45 wt% SiO2) pyroclastics are less commonly used as pozzolans. Chennai, Tamil Nadu, No. Chennai, Tamil Nadu, A H 123, Shanthi Colony, Ann Nagar, Ann Nagar, Chennai - 600029, Dist. The pozzolanic reaction is the chemical reaction that occurs in portland cement containing pozzolans. Pozzolana cement (IS: 1489-1991) : The pozzolana is a volcanic powder. With 100+ Ready Mix Concrete (RMC) plants in 35 cities, UltraTech is the largest manufacturer of concrete in India. 250/6, Kaliyamman Kovil Street, Natesan Nagar, Virugambakkam, Chennai - 600092, Dist. Chennai, Tamil Nadu, No. Chennai, Tamil Nadu, No. Chennai, Tamil Nadu, Amal Main Road, Chennai