Search results
Results from the WOW.Com Content Network
Portland cement is the most common type of cement ... blast furnace slag or fly ash and pozzolana ... 2 generation can be reduced to 0.7 kg (1.5 lb) per kg cement, ...
A reduction of 40 percent of Portland cement in the concrete mix is usually feasible when replaced with a combination of pozzolanic materials. Pozzolans can be used to control setting, increase durability, reduce cost and reduce pollution without significantly reducing the final compressive strength or other performance characteristics.
Pozzolana from Mount Vesuvius volcano, Italy. Pozzolana or pozzuolana (/ ˌ p ɒ t s (w) ə ˈ l ɑː n ə / POT-s(w)ə-LAH-nə, Italian: [potts(w)oˈlaːna]), 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. pozzolanic reaction).
For structural mortars, he recommended pozzolana (pulvis puteolanus in Latin), the volcanic sand from the beds of Pozzuoli, which are brownish-yellow-gray in colour in that area around Naples, and reddish-brown near Rome. Vitruvius specifies a ratio of 1 part lime to 3 parts pozzolana for mortar used in buildings and a 1:2 ratio for underwater ...
Portland blast-furnace slag cement, or blast furnace cement (ASTM C595 and EN 197-1 nomenclature respectively), contains up to 95% ground granulated blast furnace slag, with the rest Portland clinker and a little gypsum. All compositions produce high ultimate strength, but as slag content is increased, early strength is reduced, while sulfate ...
Compared to using Portland cement, the resulting concrete-mix using EMC does not require a higher "total cementitious content" to meet strength-development requirements. In testing by BASF, the 28-day strength-development for 55% replacement of Portland cement by a natural pozzolanic EMC was 14,000 psi / 96.5 MPa (i.e. > C95). This comprised a ...
Cement Corporation of India Limited (CCI) is the only cement manufacturing Public Sector Undertaking of Government of India.The company was incorporated as a wholly government-owned corporation on 18 January 1965, with the objective of setting up cement units in public sector to help achieve self-sufficiency in cement production in the country.
It is a mixture of gypsum plaster, Portland cement, and sand. [ 1 ] Gypsum concrete is sometimes called gypcrete by construction professionals , [ 2 ] [ 3 ] as a generic name in common usage (but not in law), but that is an alteration of Gyp-Crete , a Maxxon trademark for its brand of gypsum concrete. [ 4 ]