Results 41 to 50 of about 113 (105)

Plant responses to urban gradients: Extinction, plasticity, adaptation

Journal of Ecology, Volume 112, Issue 12, Page 2861-2875, December 2024.
Herbaceous plants often change their morphology in response to urban conditions: grass cutting, altered soils, warmer temperatures and being surrounded by tightly‐packed buildings. These changes are sometimes hereditary, which suggests that city management and planning affect the ability of plants to survive and evolve in urban environments.
Alejandro Sotillo, Laurent Hardion, Etienne Chanez, Kenji Fujiki, Audrey Muratet   +4 more
wiley   +1 more source

Effect of high‐range water reducer and W/C ratio on the fresh and mechanical properties of fiber‐reinforced natural zeolite SCC

Structural Concrete, Volume 25, Issue 5, Page 4075-4102, October 2024.
Abstract The present study aims to investigate how the use of high‐range water reducer (HRWR) and variations in water/cement (W/C) ratio affect the properties of self‐consolidating concrete (SCC) while taking into account different proportions of polypropylene fibers (PF) and natural zeolite (NZ). A total of 28 samples were cast and analyzed.
Arash K. Pour, Amir Shirkhani, Ehsan Noroozinejad Farsangi   +2 more
wiley   +1 more source

EFFECT OF SODIUM SILICATE TO SODIUM HYDROXIDE RATIOS ON DURABILITY OF GEOPOLYMER MORTARS CONTAINING NATURAL AND ARTIFICIAL POZZOLANS [PDF]

Ceramics - Silikaty, 2017
This study aims to provide the experimental data on the sulphate and acid performance of geopolymer mortar containing pozzolanic materials such as fly ash (FA), ground granulated blast furnace slag (GGBS) and natural zeolite (NZ). The alkaline solution was the combination of sodium silicate and sodium hydroxide solution with the ratio (Na ₂SiO₃/NaOH ...
openaire   +3 more sources

Present Status and Perspectives of Graphene and Graphene‐related Materials in Cultural Heritage

Advanced Functional Materials, Volume 34, Issue 13, March 25, 2024.
The conservation and restoration of cultural heritage necessitates unprecedented solutions against natural aging and degradation. Graphene and graphene‐related materials (GRMs) have unique characteristics and properties and could provide novel opportunities. This review aims to elucidate how specific characteristics of these materials can be applied to
Erica Galvagno, Edoardo Tartaglia, Maria Stratigaki, Camilla Tossi, Luigi Marasco, Federica Menegazzo, Chiara Zanardi, Fiorenzo Omenetto, Camilla Coletti, Arianna Traviglia, Mauro Moglianetti   +10 more
wiley   +1 more source

New perspectives on carbon reinforced concrete structures—Why new composites need new design strategies

Civil Engineering Design, Volume 5, Issue 5-6, Page 67-94, January 2024.
Abstract In civil engineering, carbon is typically regarded as a modern material to serve as reinforcement in concrete structures. Compared to steel reinforcement, it features two substantial benefits: It is not sensitive to corrosion, and has an enormously increased tensile strength.
Manfred Curbach, Josef Hegger, Jan Bielak, Christopher Schmidt, Sven Bosbach, Silke Scheerer, Martin Claßen, Jaan‐Willem Simon, Hans‐Gerd Maas, Anya Vollpracht, Andreas Koch, Lars Hahn, Marko Butler, Birgit Beckmann, Viviane Adam, Chokri Cherif, Rostislav Chudoba, Thomas Gries, Edeltraud Günther, Michael Kaliske, Sven Klinkel, Stefan Löhnert, Thea Lautenschläger, Thomas Matschei, Viktor Mechtcherine, Wolfgang E. Nagel, Christoph Neinhuis, Alice Niemeyer, Jörg Rainer Noennig, Michael Raupach, Stefanie Reese, Christina Scheffler, Frank Schladitz, Marzia Traverso, Steffen Marx   +34 more
wiley   +1 more source

Performance evaluation of blended cement mortar with supplementary cementitious materials: from pozzolans to industrial wastes

Reviews on Advanced Materials Science
This investigation aims to examine the behavior of natural and manufactured pozzolans, as well as the properties of blended mortars. Eco-friendly building materials are gaining the attention of researchers worldwide, as they are made from supplementary ...
Abbas Mutahir, Ali Murad, Riaz Malik Sarmad, Khaliq Wasim, Seif Eldin Hany M., Azab Marc   +5 more
doaj   +1 more source

Comparative Analysis of the Slope Stability Using Slide and Plaxis 2D Software: A Case Study of Tombel Pozzolan Quarry (South‐West Cameroon)

Applied and Environmental Soil Science, Volume 2024, Issue 1, 2024.
The presented study attempted to use coupled finite element numerical (FEM) and analytical limit equilibrium (LEM) procedures to provide comparative graphical charts demonstrating the geometry, the groundwater condition, the safety factor, and the characteristics of the support, which were implemented in the Dangote Pozzolan quarry at Tombel to ...
Mambou Ngueyep Luc Leroy, Oscar Rodrigue Michel Kenmoe, Hervé Joël Tchognia Nkuissi, Sylvain Lawou Kouayep, Gael Nkenwoum Chebou, André Chéagé Chamgoué, Innoua Mohamadou, Mahmoud Nasr   +7 more
wiley   +1 more source

Activated Bentonite for Physical, Mechanical, and Durability Properties of Concrete—A Review

Advances in Civil Engineering, Volume 2024, Issue 1, 2024.
Bentonite mostly exists in many counties and studies reported employment of activated bentonite in the concrete improves concrete performance more than using raw bentonite. However, it is not well‐known which range of bentonite activation temperature and employment dose gives the best concrete performance for the sustainability of activated bentonite ...
Tsion Amsalu Fode, Yusufu Abeid Chande Jande, Thomas Kivevele, Xing Wang   +3 more
wiley   +1 more source

Impact on flow characteristics of concrete produced with artificial sand and many pozzolanic materials

Discover Civil Engineering
Abstract Overuse of cement and natural sand has damaging impacts on the environment and society. To solve this, manufactured sand can be used in place of natural sand and cement, together with pozzolanic materials—industrial waste byproducts such as metakaolin, GGBFS, silica fume, and fly ash.
K. M. Mane, S. P. Chavan, S. A. Salokhe, Y. D. Kumbhar   +3 more
openaire   +2 more sources

Performance characteristics of concrete containing natural and artificial pozzolans

, 2011
In this research, the effects of natural zeolite (NZ) and rice stalk ash (RSA) as Portland cement replacement materials on properties of cement were investigated using three different combinations (NZ, RSA, NZ+RSA) of tests. These materials were used as substituted for Portland cement in different proportions, and then physical, mechanical and thermal ...
Şişman, Can Burak, Gezer, Erhan
openaire   +1 more source