http://www.personal.psu.edu/faculty/g/u/gur/cement%20for%20the%20future.pdf

Alkali-activated fly ashes: A cement for the future

The Role of Inorganic Polymer Technology in the Development of ‘Green Concrete’

Understanding the relationship between geopolymer composition, microstructure and mechanical properties

Advances in alternative cementitious binders

New cements for the 21st century: The pursuit of an alternative to Portland cement

This paper presents the study of the nature and conservation state of different stuccos and Roman concretes from the Roman city of Baelo Claudia (Cadiz). The chemical, mineralogical and microstructural compositions of the said materials have been established. Different causes of their decay have been found, among which we should emphasize the loss of the binding material (lime), basically due to the processes of partial solubilization; the lack of bond between the stuccos and the support stone, due to the different characteristics and properties of these two materials; and finally, the biological-type attack with the proliferation and colonization of different organisms in the said materials.

/pdf/stuccos-and-roman-concretes-of-the-baelo-claudia-city-cadiz-3ygqm1xkq0.pdf

Stuccos and román concretes of the Baelo Claudia city (Cádiz): Characterization and causes of decay

The use of clay-based product waste as an alternative prime material in Portland cement raw mixes raises the ZnO, ZrO2 and B2O3 content in the clinker. These compounds are found in the enamelled surface of the tile added to the raw mix. The present study explores the effect of adding 0.5 and 2% ZnO, ZrO2 and B2O3 to the raw mix, separately and jointly, on clinkerization and the distribution and morphology of the mineral phases in the clinker. The findings showed that while ZnO and ZrO2 are fixed in the clinker, B2O3 is partially volatized. Zinc oxide acted as a flux, while neither ZrO2 nor B2O3 increased the molten phase. The addition of the oxides to the raw mix changed the content of the main mineral phases in the clinker. Zinc oxide lowered the C3S and C3A contents, ZrO2 reduced the ferritic phase and B2O3 stabilized C2S. New mineral phases, namely 3CaO·ZnO·2Al2O3 and CaZrO3, were identified in the clinkers obtained when 2% ZnO and ZrO2 were added to the raw mix.

/pdf/efecto-del-zno-zro2-y-b2o3-en-el-proceso-de-clinkerizacion-vgrox9v45n.pdf

Efecto del ZnO, ZrO2 y B2O3 en el proceso de clinkerización: Parte I. Reacciones de clinkerizacion y composición de los clínkeres

Poster presentado al 15th International Congress on the Chemistry of Cement (ICCC), celebrado en Praga (Republica Checa) del 16 al 20 de septiembre de 2019.

/pdf/natural-radioactivity-of-portland-cement-mortars-made-with-4angek3iw3.pdf

Natural radioactivity of Portland cement mortars made with granite sand

Aditivos para el hormigón : compatibilidad cemento-aditivos basados en policarboxilatos

Methods for recycling mixed cullet, which is a constituent of solid common wastes, are analyzed It is shown that the problem of recycling wastes of this form remains topical It is established experimentally that the method of mechanochemical activation makes it possible to obtain a mixed alkaline binding substance which is promising for the production of unfired heat-insulating materials with high mechanical properties

Francisca Puertas

Papers

Stuccos and román concretes of the Baelo Claudia city (Cádiz): Characterization and causes of decay

Efecto del ZnO, ZrO2 y B2O3 en el proceso de clinkerización: Parte I. Reacciones de clinkerizacion y composición de los clínkeres

Natural radioactivity of Portland cement mortars made with granite sand

Aditivos para el hormigón : compatibilidad cemento-aditivos basados en policarboxilatos

Heat-insulating material based on cullet subjected to mechanochemical activation