Results 101 to 110 of about 2,326 (201)

Behavior of manufactured sand and recycled coarse aggregate concrete‐filled steel tubular stub columns with circular section

Structural Concrete, EarlyView.
Abstract Accelerated urbanization has intensified environmental concerns due to excessive natural resource consumption and construction waste generation. Circular concrete‐filled steel tube (CFST) columns incorporating manufactured sand recycled coarse aggregate (MS‐RCA) concrete have emerged as an innovative composite element offering notable ...
Minsheng Guan, Qi Chen, Gang Wang, Aiguo Xiong, Ying Wang, Le Li, Anne W. M. Ng, Qing Quan Liang   +7 more
wiley   +1 more source

Design and evaluation of oil well cement-based composite materials improved by multi-component flexible materials

Materials Research Express
Complex oil and gas wells often experience complex stresses underground during the extraction process, which can easily cause damage to the cement paste.
Hui Zhang, Chengwen Wang
doaj   +1 more source

Cold‐curing effects on the strength development and sulfuric acid resistance of basalt fiber‐reinforced hybrid alkali‐activated slag mortars

Structural Concrete, EarlyView.
Abstract Cold weather conditions impose substantial constraints upon the performance and long‐term resilience of concrete materials. Alkali‐activated slag (AAS) presents itself as a promising substitute, exhibiting sustained hydraulic activity even when exposed to ambient conditions characterized by low temperatures.
Zeynep Bahçeci, Murat Dener, Ahmet Benli, Bilal Balun   +3 more
wiley   +1 more source

Identification of invisible damage in prestressed concrete bridges—A demonstrator case using coda wave interferometry

Structural Concrete, EarlyView.
Abstract During their life cycle, prestressed concrete bridges are prone to wire breaks of their tendons due to fatigue or stress corrosion cracking. However, not all structures show visible cracking on the surface, which would provide timely warning of otherwise invisible damage. Brittle failure may occur.
Noah Sträter, Felix Clauß, Mark Alexander Ahrens, Peter Mark   +3 more
wiley   +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

Mechanism of synergistic reinforcement of cement paste using inorganic fibres and nano powder under high-temperature conditions and fracturing loads: Multi-scale structural evolution

Journal of Materials Research and Technology
Oil well cement paste serves in high-temperature and high-pressure wellbore environments and bears multiple fracturing loads during deep shale-gas resource development.
Binhui Li, Dongjun Wang, Zhaowei Hou, Shouliang Lu, Hong Zhang, Yu Zu, Shuai Liu, Xiaowei Cheng, Kaiyuan Mei, Chunmei Zhang   +9 more
doaj   +1 more source

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

Development of hydration temperatures on cement pastes

Acta Polytechnica CTU Proceedings
This article deals with the possible combination of high temperature fly ash with fluidised bed fly ash. The main objective of the experiment is to verify the effect of the combination of these two energy by-products on simpler systems – cement pastes.
Meruňka, Milan, Šperling, Petr, Hela, Rudolf   +2 more
openaire   +3 more sources

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

The Erosion of Constitutionalism via Constitutional Entrepreneurship: Lessons from Slovakia

The Political Quarterly, EarlyView.
Abstract The 2023 Slovak general election resulted in an illiberal coalition keen to transform the political regime following its Hungarian neighbour's post‐2010 example. Using the Slovak case, this article shows the key role of political party leaders’ constitutional entrepreneurship in the erosion of constitutionalism. Constitutional entrepreneurship
Darina Malová, Max Steuer
wiley   +1 more source