Results 161 to 170 of about 7,806 (221)

Challenges and Performance of Filter Dusts as a Supplementary Cementitious Material. [PDF]

open access: yesMaterials (Basel)
Berger J   +8 more
europepmc   +1 more source

How sustainable was ancient Roman concrete? [PDF]

open access: yesiScience
Martinez DM, Miller SA, Monteiro PJM.
europepmc   +1 more source

Evaluation of pozzolanic activity of natural and artificial pozzolans by thermal analysis

Thermochimica Acta, 2004
Abstract In this research, the pozzolanic activity of natural and artificial pozzolan used for preparation of restoration mortars was evaluated. For this purpose, several pastes were prepared, by mixing two artificial pozzolans and a natural one with commercial hydrated lime, in different ratios. The pastes were cured in standard conditions (RH = 98%,
Antonia Moropoulou   +2 more
exaly   +2 more sources

Natural Pozzolans

2017
This chapter is dedicated to several kinds of natural pozzolans that occur around the globe and describes their specific characteristics, origin and use in concrete. Moreover, the advantages and disadvantages of their use in concrete mixes are highlighted in terms of concrete properties. In particular, the referenced properties in this chapter are that
Dedeloudis, C.   +7 more
openaire   +1 more source

Pozzolana and Pozzolanic Cements—A Review Part—II: Pozzolanic Cements

Transactions of the Indian Ceramic Society, 1983
In this review pozzolanic cements have been discussed. A certain amount of pozzolana can be mixed with Portland cement to yield pozzolanic cements and thus the mixture becomes economic as well as inter-reactive. The specific advantages are its better strength, improved workability, less heat of hydration, less shrinkage and greater resistance to ...
C. Samanta, M. K. Chatterjee
openaire   +1 more source

Pozzolans and the Pozzolanic Reaction

1990
The most often used mineral admixture in the modern concrete industry is the pozzolan. A pozzolan, and there are many of them, is defined as “siliceous or siliceous and aluminous materials which in themselves possess little or no cementitious value but will, in finely divided form and in the presence of moisture, chemically react with calcium hydroxide
openaire   +1 more source

Pozzolanic activity tests as a measure of pozzolans' performance. Part 1

Magazine of Concrete Research, 2007
The current methodologies used for the selection and classification of pozzolans present certain chemical and physical requirements that may restrict their use. A good example of this is the use of the pozzolanic activity index as the main parameter in the selection and classification of pozzolans. This is determined by several different methodologies
G. P. Gava, L. R. Prudêncio
openaire   +1 more source

Pozzolanic activity tests as a measure of pozzolans' performance. Part 2

Magazine of Concrete Research, 2007
Part 1 of the current paper demonstrated the lack of agreement between the results obtained from different standard pozzolanic activity tests. This can be explained by the significant differences observed in the recommended test procedures that, in some cases, allow variations in parameters which have a remarkable influence on the pozzolanic reaction.
G. P. Gava, L. R. Prudêncio
openaire   +1 more source

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