Results 41 to 50 of about 3,209 (166)

Investigation of Mechanical and Fresh Properties of Ultra-High-Performance Concrete Incorporating Second-Generation Superplasticizers

Applied Sciences
Ultra-high-performance concrete (UHPC) has been following economic and environmental trends for the past two decades. Limited research has been conducted on the significance of superplasticizers in UHPC products, despite the high costs they entail for ...
Sama Tajasosi, Jalil Barandoust, Ashkan Saradar, Mohammad Mohtasham Moein, Sam E. Rigby, Moses Karakouzian   +5 more
doaj   +1 more source

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

Suitability of commercial superplasticizers for one-part alkali-activated blast-furnace slag mortar [PDF]

, 2020
Alkali-activated materials are a low-CO₂ alternative for Portland cement in construction. However, one major issue in their use is the poor or varying functionality of the currently available commercial superplasticizers.
Kinnunen, Päivö, Abdollahnejad, Zahra, Luukkonen, Tero, Illikainen, Mirja, Ohenoja, Katja   +4 more
core   +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

Experimental and analytical investigations on the effect of steel fibers on the crack behavior and strength of dapped‐end connections

Structural Concrete, EarlyView.
Abstract Reinforced concrete (RC) dapped‐end connections feature a sharp re‐entrant corner subjected to high stress concentrations, leading to wide cracks under service loads and potential durability issues such as reinforcement corrosion. Effective crack control is therefore essential in the design of new dapped‐end connections. Steel fiber reinforced
Karin Yu, Sameera Hippola, Jaime Mata‐Falcón, Boyan Mihaylov   +3 more
wiley   +1 more source

Evaluation of initial setting time due to superplasticizers [PDF]

, 2017
This paper shows how polycarboxylate based superplasticizer affects the initial setting time of cement paste. Three superplasticizers are used in this study with different properties and aiming to determine the delay in initial setting time due to ...
Ram, Shobha, Singh, Abhishek, Alok Verma, Verma, Alok, Abhishek Singh, Shobha Ram   +5 more
core   +1 more source

Influence of shear reinforcement detailing on the shear capacity of reinforced concrete beams

Structural Concrete, EarlyView.
Abstract Alternative shear reinforcement layouts that do not fully enclose the longitudinal tensile reinforcement can significantly improve the constructability of reinforced concrete (RC) members. However, their influence on shear transfer mechanisms is not yet fully understood. To address this gap, an experimental program comprising 10 shear tests on
Franz Untermarzoner, Michael Rath, Simon Leitner, Tobias Huber, Johann Kollegger, Patrick Huber   +5 more
wiley   +1 more source

Comparative study between polymeric superplasticizers

, 2008
The present work aims to compare the properties of concrete produced with different incorporation of superplasticizers. Superplasticizers or water reducing agents are considered the most important chemical admixtures in concrete mixtures, due to their ...
Ferreira, Rui Miguel, Pires, Patrício, Machado, A. V., Azevedo, Isabel, Aguiar, J. L. Barroso de   +4 more
core   +1 more source

Effect of dose and types of the water reducing admixtures and superplasticizers on concrete strength and durability behaviour: a review

Journal of Civil Engineering and Management
As one of the concrete admixtures, water reducing admixtures and superplasticizers are usually used to reduce the mixing water volume and improve the performance of the harden concrete while maintaining better workability of the fresh concrete. However,
Xiao-Hui Wang, Zhi-Chao Fang, Li Zheng
doaj   +1 more source

Shear capacity of reinforced concrete one‐way slabs with intermediate support and distributed loading

Structural Concrete, EarlyView.
Abstract Experimental campaigns on reinforced concrete members, being the basis for database evaluations used for validation of many shear design approaches, mostly include simply supported single‐span beams with concentrated loads. Other support and loading conditions representative for actual slab systems are highly underrepresented.
Annkathrin Sinning, Viviane Adam, Martin Classen, Josef Hegger   +3 more
wiley   +1 more source