Results 71 to 80 of about 1,990 (176)

A Mass Balance Approach for Thermogravimetric Analysis in Pozzolanic Reactivity R³ Test and Effect of Drying Methods. [PDF]

Materials (Basel), 2021
Weise K, Ukrainczyk N, Koenders E.
europepmc   +1 more source

Investigating Pozzolanic Reactivity of Ground Ferronickel Slag Through the R 3 Test for Its Potential Use as Alternative Supplementary Cementitious Material

International Journal of Concrete Structures and Materials
This study investigates the pozzolanic reactivity of ferronickel slag (FNS), the fourth most discharged smelting by-product in China. Cumulative heat of hydration (R3) tests were conducted on FNS with varying fineness levels (111.27 to 4.5 μm) to compare
Dongho Jeon, Sungjin Jung, Jihoon Lee, Juhyuk Moon   +3 more
doaj   +1 more source

Optimizing calcination for low-grade calcined kaolinite clay: Reactivity and energy consumption

Case Studies in Construction Materials
The cement industry is actively seeking sustainable strategies to enhance efficiency and reduce its environmental influences. Calcined kaolinite clay (CC) has emerged as a promising supplementary cementitious material (SCM) that offers significant cost ...
Hao Sui, Bin Wang, Ziyu Chen, Yanming Liu, Kwesi Sagoe-Crentsil, Wenhui Duan   +5 more
doaj   +1 more source

Pozzolanic activity and alkaline reactivity of a mordenite-rich tuff

Microporous and Mesoporous Materials, 2009
Peer ...
Vigil de la Villa, R., Fernández, R., García, R., Villar-Cociña, E., Frías, Moisés   +4 more
openaire   +2 more sources

The effect of various chemical activators on pozzolanic reactivity: A review

Scientific Research and Essays, 2012
Pozzolans are being extensively used as a partial cement replacement in the production of Portland cement concrete. The advantages of using pozzolans are lower costs and better durability, however it requires longer setting time and the strength development at the initial age is slower.
openaire   +1 more source

Carbonated blast-furnace slag as supplementary cementitious material: Phase transition and effect on cement hydration

Materials & Design
Blast-furnace slag, which contains high levels of CaO (and MgO), holds potential as a feedstock for CO2 capture and storage. This study investigates the phase transitions occurring during the wet carbonation of ground granulated blast-furnace slag (GGBFS)
Gao Deng, Nannan Zhang, Wenyu Liao, Yongjia He, Linnu Lu, Lingyu Chi, Hongyan Ma   +6 more
doaj   +1 more source

Chemical, phasic and calorimetric evaluation of a pozzolanic material obtained by electric arc-assisted aluminothermy using cupola slag

Minería y Geología, 2020
The purpose of this study was to evaluate the chemical, phasic and calorimetric evaluation of a pozzolanic material obtained by electric arc-assisted aluminothermy using cupola slag to provide criteria on its pozzolanic nature.
Leidys Laura Pérez-González, Rafael Quintana-Puchol, Adrián Alujas-Díaz, Daniellys Alejo-Sánchez   +3 more
doaj  

Performance evaluation of carbonated cement paste derived from hydrated Portland cement based binders as supplementary cementitious material

Cement
The production of concrete has gone up from 2.3 billion m3 in 2002 to 14 billion m3 in 2020. At the same time, the amount of construction and demolition waste generated annually has reached levels of 3 billion tons, with concrete rubble making up a major
Vineet Shah
doaj   +1 more source

Impact of calcination technology on properties of calcined clays

RILEM Technical Letters
Calcined kaolinitic clays are known to be very reactive pozzolans, and combined with limestone can enable significant clinker substitution in cementitious systems.
José Fernando Martirena Hernández, Mathieu Antoni, Yanisleidy Oquendo-Machado, Ruben Borrajo-Perez, Adrian Alujas-Diaz, Roger Almenares-Reyes   +5 more
doaj   +1 more source

Effects of Supplemetary Cementitious Materials on the Air Permeability of Concrete

Journal of Materials and Engineering Structures, 2017
In order to support the use of cement combination concrete in construction, this paper investigated the resistance of Portland cement and some binary and ternary cement concretes containing fly ash, silica fume and metakaolin to air permeability at equal
Samuel Olufemi Folagbade
doaj