Results 31 to 40 of about 2,625 (181)

Sulfate Resistance of Alkali Activated Pozzolans [PDF]

International Journal of Concrete Structures and Materials, 2014
The consequence of sulfate attack on geopolymer concrete, made from an alkali activated natural pozzolan (AANP) has been studied in this paper. Changes in the compressive strength, expansion and capillary water absorption of specimens have been investigated combined with phases determination by means of X-ray diffraction.
Bondar, Dali, Lynsdale, C. J., Milestone, N. B., Hassani, N.   +3 more
openaire   +2 more sources

Influence of processing methods on the strength activity index for sludge as a supplementary cementitious material

Case Studies in Construction Materials
Utilizing activated sludge as a partial substitute for cement can both curb cement consumption and address sludge reuse in an economically and environmentally-friendly manner.
Youzhi Yang, Ziye Kang, Zhuofan Wu, Jinrui Zhang, Dongshuai Hou, Biqin Dong   +5 more
doaj   +1 more source

Fineness Effect on Pozzolanic Activity of Cu-Ni Slag in Cemented Tailing Backfill

Advances in Materials Science and Engineering, 2020
This paper presents the experimental results of the fineness effect on the pozzolanic activity of Cu-Ni slag in cemented tailing backfill. Cement paste and cemented tailing backfill samples that without or contain Cu-Ni slag with various grinding times ...
Wenyuan Xu, Xiaocong Yang, Wenchen Li, Lijie Guo   +3 more
doaj   +1 more source

Durability performance of a high‐performance fiber‐reinforced concrete for bridge applications

Structural Concrete, EarlyView.
Abstract This paper investigates the durability performance of a coarse‐aggregate high‐performance fiber‐reinforced concrete (HPFRC) developed as a cost‐efficient material solution for precast bridge applications. A comprehensive experimental program was conducted to assess the resistance of the material to the principal deterioration mechanisms ...
Rolando Baldiviezo, Rafael Ruiz, Borja Regúlez, Carmen Andrade, Hugo Corres, Valle Chozas‐Ligero, Leonardo Todisco   +6 more
wiley   +1 more source

Pozzolanic Activity of Fly Ash

Bangladesh Journal of Scientific and Industrial Research, 1970
Various physico-chemical properties such as particle size distribution, specific gravity, specific surface area, chemical composition, solubility of Fly Ash (FA) in NaOH and pozzolanic activity of fly ash towards lime have been investigated. Chemical analysis of FAreveals that the FA used in this present investigation belongs to class F type of fly ash.
M Zaman, AMS Alam, S Alam, Z Yeasmin, KN Farooque   +4 more
openaire   +2 more sources

Mechanical, rheological, and durability performances of GGBS‐based concrete for potential application to prestressed structures

Structural Concrete, EarlyView.
Abstract Ground granulated blast‐furnace slag (GGBS) is a widely used clinker substitute in concrete, recognized for its potential to significantly reduce environmental impacts. However, its application in prestressed concrete remains limited in several countries, mainly due to concerns regarding early‐age mechanical performance and long‐term ...
D. Rolando Baldiviezo, Leonardo Todisco, Cristina Argiz, Carmen Andrade, Amparo Moragues, Jaime C. Gálvez, Hugo Corres   +6 more
wiley   +1 more source

Microscopy: A tool for quantitative pozzolanic activity in blended cements [PDF]

Microscopy and Microanalysis, 2013
The reuse of waste fluid catalytic cracking (FCC) catalyst, from oil-refinery industry, as a partial substitute of cement is a promising way of reducing the environmental impact of cement production and, therefore, contributes for industrial sustainability.
Costa, Carla, Laginha, I., Carvalho, P. A.   +2 more
openaire   +2 more sources

Evaluation of the pozzolanic activity of red ceramic waste using mechanical and physicochemical methods

Cerâmica
Alternative cementitious materials can potentially reduce the environmental impact of the extraction of lime and the hazardous production of Portland cement.
R. A. Araújo, A. L. R. de Menezes, K. C. Cabral, A. K. C. Nóbrega, A. E. Martinelli, K. G. M. Dantas   +5 more
doaj   +1 more source

Geopolymers as a Sustainable Chemical Platform: From Building Materials to Advanced Functional Applications

The Chemical Record, EarlyView.
Geopolymers are presented as a chemically programmable platform whose properties emerge from activation chemistry, nanoscale disorder, and interfacial design. The review highlights sustainability challenges, the shift toward nanoengineered and hybrid systems, and the rise of halloysite‐based architectures enabling tunable structures across scales for ...
Martina Maria Calvino, Lorenzo Lisuzzo, Giuseppe Cavallaro, Stefana Milioto, Giuseppe Lazzara   +4 more
wiley   +1 more source

Enhancement of the pozzolanic activity of natural clays by mechanochemical activation

Construction and Building Materials, 2022
Replacement of cement with supplementary cementitious materials (SCMs) is a proven method to reduce clinker in cement and contribute to decreased CO2 emissions. Natural clays are commonly occurring materials that do not possess pozzolanic activity in their original state.
Tole I., Delogu F., Qoku E., Habermehl-Cwirzen K., Cwirzen A.   +4 more
openaire   +3 more sources