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Journal Article
Published: 01 December 2020
Clays and Clay Minerals (2020) 68 (6): 580–587.
... was to find out if the hydration properties of muscovite contained in mine tailings are suitable for it to be used as a pozzolan in cement, after undergoing mechanical activation. Aqueous suspensions of mechanically activated muscovite were blended with 10, 20, or 30 wt.% calcium oxide and then allowed...
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Journal Article
Published: 08 November 2019
Environmental & Engineering Geoscience (2019) 25 (4): 289–300.
... stabilization methods for clay soils employ pozzolanic or other cementitious binders, creating a chemically bound clay-admixture matrix. These admixtures commonly require a curing period after placement and compaction. Alternatively, aqueous polymers can be used in diluted form without any need for a curing...
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Journal Article
Published: 01 June 2019
Clays and Clay Minerals (2019) 67 (3): 209–216.
...Geng Yao; Haoyu Zang; Junxiang Wang; Peng Wu; Jun Qiu; Xianjun Lyu Abstract In order to provide a theoretical foundation for the utilization of tailings as supplementary cementitious materials, the pozzolanic activity of muscovite—a typical mineral phase in tailings—before and after mechanical...
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Series: EMU Notes in Mineralogy series
Published: 01 January 2019
DOI: 10.1180/EMU-notes.20.4
EISBN: 9780903056625
... achievements related to architectural activities, from simple adobe to high-performance modern concrete. It is argued that among pre-industrial binders the Roman pozzolanic mortars were highly optimized materials, skillfully prepared and very durable. Their innovative use in architecture is one of the keys...
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Journal Article
Published: 01 July 2017
American Mineralogist (2017) 102 (7): 1435–1450.
...Marie D. Jackson; Sean R. Mulcahy; Heng Chen; Yao Li; Qinfei Li; Piergiulio Cappelletti; Hans-Rudolf Wenk Abstract Pozzolanic reaction of volcanic ash with hydrated lime is thought to dominate the cementing fabric and durability of 2000-year-old Roman harbor concrete. Pliny the Elder, however...
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Journal Article
Published: 01 June 2017
Italian Journal of Geosciences (2017) 136 (2): 238–262.
... and fine pozzolanic aggregate ( pulvis puteolanus ), and quartz-feldspar sands (present as crystal-clasts with an almost constant ratio of about 2:1, respectively). The cocciopesto is anomalously rare or absent. In the mortars local dacitic volcanic rock were also used, especially in the concrete...
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Journal Article
Journal: Clay Minerals
Published: 01 March 2015
Clay Minerals (2015) 50 (1): 133–152.
.... The pozzolanic reaction predominated during the early ages, but disappeared as time passed. In contrast, the carbonation reaction increased by consuming ~45% of the total amount of CH produced after aging for 91 days. Only one blended cement paste reached the compressive strength of the plain cements...
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Journal Article
Published: 01 February 2015
Italian Journal of Geosciences (2015) 134 (1): 104–113.
..., the particles of which are strongly bound by pozzolanic cementitious compounds formed by reactions with soil silica and lime in the presence of water. In this study, lime, silica fume, and lime-silica fume have been used for stabilizing and considering their effects on the soft clay soil. A grey-colored...
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Journal Article
Published: 01 November 2013
American Mineralogist (2013) 98 (11-12): 1917–1918.
... in seawater after mixing with the key ingredient of alumina-rich volcanic ash. This notably unique combination formed the fundamental cementitious binding component, the glue, which, when mixed with pozzolanic coarse aggregates of zeolitic tuff, composed a unique concrete mixture that could set quickly under...
Journal Article
Published: 01 October 2013
American Mineralogist (2013) 98 (10): 1669–1687.
... of seawater and alkali- and alumina-rich volcanic ash appear to be critical to Al-tobermorite crystallization. The long-term stability of the Al-tobermorite provides a valuable context to improve future syntheses in innovative concretes with advanced properties using volcanic pozzolans. * E...
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Journal Article
Published: 01 February 2013
Environmental & Engineering Geoscience (2013) 19 (1): 85–94.
... then related to macroscopic mechanical characteristics in order to better understand the mechanisms controlling expansive soil behavior. CFA stabilization achieved similar results as lime by activating cation exchange and pozzolanic reactions, which resulted in flocculation of clay particles and creation...
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Journal Article
Published: 01 January 2012
Reviews in Mineralogy and Geochemistry (2012) 74 (1): 211–278.
...), where archeological indications of strong ties with the Minoan culture were found and large quantities of suitable highly siliceous volcanic ash were present. This so-called Santorin earth has been used as a pozzolan in the Eastern Mediterranean until recently ( Kitsopoulos and Dunham 1996 ). Evidence...
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Journal Article
Journal: Clay Minerals
Published: 01 June 2011
Clay Minerals (2011) 46 (2): 213–223.
... for the control composition due to the fact that clinoptilolite exhibits its pozzolanic activity later in the hydration. In these later stages, pores with radii below 500 nm increased at the expense of larger pores. The change in the pore-size distribution between the first and sixth months of hydration occurs...
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Journal Article
Journal: Clay Minerals
Published: 01 June 2011
Clay Minerals (2011) 46 (2): 225–232.
... the 28 th and 180 th days of hydration the specific volume of the pores in all the cement-zeolite pastes decreased due to the filling of the pores with products from the pozzolanic reaction between the zeolites and the hydration products of the cement. The pozzolanic reaction between zeolite...
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Journal Article
Journal: Clay Minerals
Published: 01 June 2011
Clay Minerals (2011) 46 (2): 241–250.
...V. Lilkov; O. Petrov; V. Petkova; N. Petrova; Y. Tzvetanova Abstract This paper presents results from comparative thermogravimetric, calorimetric and pozzolanic activity analyses of five natural zeolite samples from Bulgaria, Slovakia, Philippines, USA and North Korea. The zeolites actively...
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Journal Article
Published: 01 November 2010
European Journal of Mineralogy (2010) 22 (6): 767–777.
...Ruben Snellings; Gilles Mertens; Biliana Gasharova; Krassimir Garbev; Jan Elsen Abstract The pozzolanic reaction of a natural zeolite-rich tuff and portlandite was investigated by means of IR spectroscopy. The zeolite tuff consisted mainly of Ca-rich clinoptilolite. A detailed analysis...
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Journal Article
Published: 01 April 2010
Clays and Clay Minerals (2010) 58 (2): 154–163.
... of 2 to 24 h, was observed because of a small increase in concentration of Ca 2+ and in pH. During long-term treatment (120 h), a considerable increase in concentration of Ca 2+ (137.0 mg/g) and pH (pH = 10) was observed near the cathode. This led to a pozzolanic reaction, which in turn caused...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2408(05)
... systems, which produced volcanic materials for buildings (pozzolan and tuff). In parts of Naples and Rome, there are areas collapsing over ancient quarries in the heart of historical areas. Some of these tunnel systems are fi lled with unhealthy sewage waters, slowly fl owing below highly populated...
Journal Article
Published: 01 May 2000
Environmental & Engineering Geoscience (2000) 6 (2): 171–176.
...Abdel Wahid Hago; Amer Al-Rawas; Ali S. Al-Harthi Abstract Sarooj is an artificial pozzolan produced by burning special types of clays. It has been used extensively in Oman as a cementing material in concrete masonry construction, particularly in hydraulic structures, buildings and military...
Book Chapter

Bryant Mather
Series: GSA Reviews in Engineering Geology
Published: 01 January 1969
DOI: 10.1130/REG2-p105
EISBN: 9780813758022
... Abstract Pozzolans are finely divided siliceous or siliceous and aluminous materials that are by themselves of little or no cementitious value but that react with calcium hydroxide in the presence of water at ordinary temperatures to form cementitious compounds. They include natural materials...