Results 61 to 70 of about 113 (105)

The Omani Artificial Pozzolans (Sarooj)

Cement, Concrete, and Aggregates, 2001
Abstract Sarooj is a local Omani term for artificial pozzolana produced by calcining clays. Calcined clay mixed with lime and water has been used as a cementing material for a long time. It has been used widely in hydraulic structures due to its good hydraulic properties and in military defensive installations due to its durability. This
AA Al-Rawas, AW Hago, D Al-Lawati, A Al-Battashi   +3 more
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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
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Performance of Sintered Pozzolanic Artificial Aggregates as Coarse Aggregate Replacement in Concrete

2021
The abundant increase in waste quantities year by year and the depletion of natural resources worldwide are the major concerns among researchers. Recycling and reusing various types of natural or by-product material waste from industry become highlighted in the recent study.
Rafiza Abd Razak, Mohd Mustafa Al Bakri Abdullah, Kamarudin Hussin, null Subaer, Zarina Yahya, Rosnita Mohamed, Alida Abdullah   +6 more
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New evidence of early use of artificial pozzolanic material in mortars

Journal of Archaeological Science, 2013
Hydraulic building composites, such as mortars and plasters, produced with artificial pozzolanic materials, became widely popular thanks to the Romans. Reports on earlier uses of such composites can also be found, mainly in archaeological and historic documents. These date back as far as the time of Minoan and Mycenaean civilizations.
Theodoridou, Magdalini, Ioannou, Ioannis, Philokyprou, Maria, Theodoridou, Magdalini, Ioannou, Ioannis, Philokyprou, Maria   +5 more
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Historic Mortars with Burned Alum Shale as an Artificial Pozzolan

2012
From the mid-eighteenth century extensive research in Sweden and in present day Finland focused on the development of mortars with hydraulic properties, the results mainly published by the Royal Swedish Academy of Science. The aim was to replace imported Italian pozzolan and Dutch trass with a pozzolan produced in Sweden.
Sölve Johansson, Jan Erik Lindqvist
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Pozzolanic Activity in Relation to Specific Surface of Some Artificial Pozzolanas—Part II: Relationship Between Pozzolanic Activity and Specific Surface

Transactions of the Indian Ceramic Society, 1967
Pozzolanic activity of some artificial pozzolanas having widely different chemical and mineralogical composition has been studied in relation to their specific surfaces. It has been observed that there is no direct relationship between specific surface and pozzolanic activity. Chemical and mineralogical compositions have a very important role.
Manas Kumar Chatterjee, Durgadas Lahiri
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Prediction of chloride permeability of concretes containing ground pozzolans by artificial neural networks

Materials and Structures, 2013
This research was to study the chloride penetration resistance of normal (W/B of 0.80, 0.62, 0.48) and high (W/B of 0.41, 0.35, 0.30) strength concretes containing ground pozzolans such as fly ash, bottom ash and rice husk ash using the rapid chloride penetration test and the immersion test methods. Furthermore, on the basis of this experimental data,
S. Inthata, W. Kowtanapanich, R. Cheerarot   +2 more
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Use of Artificial Neural Network in Predicting Permeability of Dispersive Clay Treated With Lime and Pozzolan

International Journal of Scientific Research in Environmental Sciences, 2015
The treatment of a dispersive core soil can be achieved by mixing with lime and pozzolan, separately or simultaneously. On a dispersive soil treated with lime and pozzolan, experimental measurements of permeability were carried out with varying curing times and percentages of the additives.
Amir Hossein Vakili, Seyedmahmoud Davoodi, Ali Arab, Mohamad Razip bin Selamat   +3 more
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EFFECT OF FIRING TEMPERATURES AND DURATIONS OF RAW MATERIALS ON THE PROPERTIES OF ARTIFICIAL POZZOLANIC BLENDED CEMENT

1991
Two different raw materials, i.e. Sinai Kaolin (pure kaolin) and Degla marl (lime-rich clay) were used in this study. The effect of calcination temperatures and its duration on the hydration properties of the prepared pozzolanic cements were investigated. The firing temperatures used, were 750, 850, and 950 degrees centigrade with durations of one, two
FATHY H. MOSALAMY, M.R. MABROUK
openaire   +1 more source

Examining of the Effect of Pozzolans on Concrete Compressive Strength by Artificial Neural Network

2006
In this study, determination of effect of fly-ash content as pozzolan admixture on the compressive strength of concrete was investigated by use of Artificial Neural Network (ANN). ANN has been gain to importance in civil engineering application as soon as other applications in last century. For modeling to ANN, Matlab program was used.
Topçu, İlker Bekir, Uygunoğlu, Tayfun, Sivri, Mustafa   +2 more
openaire   +1 more source