Results 11 to 20 of about 2,024 (169)

Significance of fineness of pozzolans in determining pozzolanic reactivity

Cement
This paper presents the quantification of the pozzolanic reactivity of pozzolans examined in terms of compressive strength, bound water and electrical resistivity.
Mahipal Kasaniya, Michael DA Thomas, Ted Moffatt, Ashlee Hossack   +3 more
doaj   +2 more sources

Pozzolanic Reactivity and Hydration Products of Hedenbergite

Chemical Engineering Transactions, 2017
With hedenbergite, desulfurized gypsum and calcium hydroxide as the materials, this paper studies the pozzolanic reactivity of finely ground hedenbergite and performs XRD, IR, NMR and SEM analysis on the hydration products of the neat paste specimens ...
Biyao Geng, Wen Ni, Jiajia Wang, Xiajie Qiu, Xiaowei Cui, Chao Ren, Siqi Zhang, Yi Xing   +7 more
doaj   +2 more sources

Classification and Milling Increase Fly Ash Pozzolanic Reactivity [PDF]

Frontiers in Built Environment, 2021
Upcycling and reclaiming of low quality or stored coal combustion fly ashes could enable to tap into a voluminous resource of supplementary cementitious materials (SCMs) for low-carbon blended cements.
Ruben Snellings, Hadi Kazemi-Kamyab, Peter Nielsen, Liesbet Van den Abeele   +3 more
doaj   +2 more sources

Monitoring the reactivity of pozzolans by thermogravimetric method

Acta Polytechnica CTU Proceedings
This work focuses on comparing the effect of ten different types of pozzolans on the strength of lime pastes in relation to their pozzolanic activities as determined by the Chapelle test and monitoring the reactivity of these pozzolans using the ...
Martin Vyšvařil
doaj   +2 more sources

The Influence of Production Parameters on Pozzolanic Reactivity of Calcined Clays

Nordic Concrete Research, 2018
Calcined clays are gaining increasing interest as future supplementary cementitious materials for the production of blended cements. Besides the mineralogy, the right production conditions can affect the pozzolanic activity of calcined clays.
Danner Tobias, Justnes Harald
doaj   +3 more sources

Methods for Evaluating Pozzolanic Reactivity in Calcined Clays: A Review. [PDF]

Materials (Basel), 2023
The search for alternative materials to replace ordinary Portland cement has been the object of work that enhances the investigation of the use of pozzolanic materials and the reduction of the carbon footprint with supplementary cementitious materials. However, not all materials are available to meet the large-scale demand for cement replacement.
Pinheiro VD, Alexandre J, Xavier GC, Marvila MT, Monteiro SN, de Azevedo ARG.   +5 more
europepmc   +3 more sources

Evaluation of Pozzolanic Reactivity of Artificial Pozzolans [PDF]

Materials Science Forum, 2012
Pozzolanicity is a very interesting issue regarding building materials, as a way to enhance mortars and concrete durability. This property results from the reaction between calcium hydroxide and silica and alumina based materials. Different types of natural and artificial pozzolans show pozzolanic activities that differ depending on the materials ...
Pontes, J., Santos Silva, A., Faria Rodrigues, P.   +2 more
openaire   +3 more sources

Physical properties and reactivity of pozzolans, and their influence on the properties of lime–pozzolan pastes [PDF]

Materials and Structures, 2010
This paper studies how pozzolan properties including particle size, specific surface, chemical and mineral composition, amorphousness and water demand, affect their reactivity as well as the strength of lime–pozzolan pastes. Reactivity was evaluated with chemical, mechanical and mineralogical methods.
WALKER, ROSANNE, PAVIA, SARA
openaire   +3 more sources

Evaluation the pozzolanic reactivity of sonochemically fabricated nano natural pozzolan

Ultrasonics Sonochemistry, 2012
Natural pozzolans are appropriate supplementary cementitious materials in cement and concrete industry. A simple sonochemical method was developed to synthesize nanostructures of natural pozzolan. Chemical composition, crystallinity, morphology and reactivity of the natural pozzolan samples were compared before and after the sonochemical process, by ...
Azadeh, Askarinejad, Ali Reza, Pourkhorshidi, Tayebeh, Parhizkar   +2 more
openaire   +2 more sources

Valorisation of sugarcane bagasse ash (SCBA) with high quartz content as pozzolanic material in Portland cement mixtures

Materiales de Construccion, 2018
Portland cement (OPC) production is one of the most contaminating greenhouse gas producing activities. In order to reduce OPC consumption, several alternatives are being assessed, and the use of pozzolanic material is one of them.
A. M. Pereira, J. C.B. Moraes, M. J.B. Moraes, J. L. Akasaki, M. M. Tashima, L. Soriano, J. Monzó, J. Payá   +7 more
doaj   +1 more source