Results 121 to 130 of about 870 (178)

Enhancing cement properties for oil wells using MgO-PAM nanocomposites. [PDF]

Sci Rep
Li Z, Ghnim ZS, Kanjariya P, Rajiv A, Saud HR, Shankhy A, Jaidka S, Joshi KK, Adhab AH, Mahdi MS, Mansoor AS, Radi UK, Abd NS, Batuli A, Alam MM, Jiang W.   +15 more
europepmc   +1 more source

RETRACTED: Influence of pozzolanic addition on strength and microstructure of metakaolin-based concrete.

PLoS One
Bansal M, Bansal M, Bahrami A, Krishan B, Garg R, Özkılıç YO, Althaqafi E.   +6 more
europepmc   +1 more source

Synergistic effects of rice husk ash and extracted microsilica on the performance of high-strength concrete. [PDF]

Sci Rep
Ullah MF, Tang H, Ullah A, Khan K.
europepmc   +1 more source

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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, Asterios Bakolas, Eleni Aggelakopoulou   +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., Zervaki, M., Sideris, K., Juenger, M., Alderete, N., Kamali-Bernard, Siham, Villagrán, Y., Snellings, R.   +7 more
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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
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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

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
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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
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Effects of pozzolanic and non-pozzolanic nanomaterials on cement-based materials

Construction and Building Materials, 2019
Abstract Although it has been verified that nanomaterials can improve the properties of cement-based materials, the research on the characteristics and mechanism of different types of nanomaterials is still inadequate. Two typical types of nanomaterials, nano-SiO2 (pozzolanic material) and nano-TiO2 (non-pozzolanic material), are utilized in this ...
Huigang Xiao, Fengling Zhang, Rui Liu, Rongling Zhang, Zhiguo Liu, Hongxia Liu   +5 more
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