Results 81 to 90 of about 16,582 (207)

Advances in research on CO2 corrosion mechanisms, modification, and application of cements for injection wells in geologic CO2 sequestration

Meitian dizhi yu kantan
Background and Merhod The wellbore integrity of CO2 injection wells plays a critical role in maintaining the long-term safe operation of geologic CO2 sequestration (GCS) projects.
Feng HAO, Zongfeng ZHANG, Hongmin WANG, Shuai DU, Da HUANG, Xuefeng YANG, Kexin WANG, Yu ZHANG   +7 more
doaj   +1 more source

Reinforced Concrete Structure Composition Analysis after Electrochemical Chloride Extraction

International Journal of Electrochemical Science, 2016
Corrosion of reinforcing steel bar is one of the major reasons for the deterioration of reinforced concrete structures. Chloride permeation from deicing salts, seawater or other environmental causes is the primary reason for the corrosion ...
Ning Xue, Xingwang Liu, Hanbo Jia, Yingshuai Wu, Jingjun Ma   +4 more
doaj   +1 more source

Evaluations of the effectiveness of the near‐surface mounted steel materials in strengthening short RC wall‐like columns with openings

Structural Concrete, EarlyView.
Abstract In practice, reinforced concrete (RC) wall‐like columns often have openings to facilitate building services, which creates stress concentrations around the opening, resulting in the weakening of their load‐carrying capacity. This study proposes innovative strengthening methods using near‐surface mounted (NSM) incorporating steel materials to ...
Ahmed Hamoda, Mizan Ahmed, Mohamed Ghalla, Ahmad G. Saad, Aref A. Abadel   +4 more
wiley   +1 more source

Performance enhancement of reinforced concrete columns using stainless steel and galvanized steel plates: Experimental and numerical investigation

Structural Concrete, EarlyView.
Abstract This study introduces an innovative approach to strengthening defected reinforced concrete (RC) columns using externally bonded stainless steel and galvanized steel plates. Unlike conventional strengthening methods, this technique replaces traditional transverse stirrups with steel sheets, providing enhanced confinement and ductility.
Ahmed Hamoda, Khaled Sennah, Ramy I. Shahin, Aref A. Abadel, Mizan Ahmed, Mohamed Ghalla   +5 more
wiley   +1 more source

Biochar affects compressive strength of Portland cement composites: a meta-analysis

Biochar
One strategy to reduce CO2 emissions from cement production is to reduce the amount of Portland cement produced by replacing it with supplementary cementitious materials (SCMs).
Zhihao Zhao, Ali El-Naggar, Johnson Kau, Chris Olson, Douglas Tomlinson, Scott X. Chang   +5 more
doaj   +1 more source

Structural analysis of composite metakaolin-based geopolymer concrete

Revista IBRACON de Estruturas e Materiais, 2018
The study of alternative binders to Portland cement, such as geopolymer cements, offers the chance to develop materials with different properties. With this purpose, this study evaluated experimentally the mechanical behavior of a geopolymer concrete ...
F. PELISSER, B. V. SILVA, M. H. MENGER, B. J. FRASSON, T. A. KELLER, A. J. TORII, R. H. LOPEZ   +6 more
doaj   +1 more source

Pre‐failure behavior of continuous post‐tensioned and post‐grouted beam in case of tendon failure

Structural Concrete, EarlyView.
Abstract Grouted tendons are a common solution for long‐span bridge structures. The grout provides bond and corrosion protection for prestressing steel. However, if the grouting is defective, corrosion of the prestressing steel may initiate and eventually lead to tendon failure.
Olli Asp, Joonas Tulonen, Anssi Laaksonen   +2 more
wiley   +1 more source

Ultrafine portland cement performance

Materiales de Construccion, 2018
By mixing several binder materials and additions with different degrees of fineness, the packing density of the final product may be improved. In this work, ultrafine cement and silica fume mixes were studied to optimize the properties of cement-based ...
C. Argiz, E. Reyes, A. Moragues
doaj   +1 more source

Explainable artificial intelligence (XAI)‐powered design framework for lightweight strain‐hardening ultra‐high‐performance composites (SH‐UHPC)

Structural Concrete, EarlyView.
Abstract Lightweight strain‐hardening ultra‐high‐performance concrete composite (SH‐UHPC) is an outstanding alternative for engineering applications and infrastructure thanks to its outstanding strength, toughness, ductility, and low density. The integration of artificial intelligence (AI)‐based modeling strategies into engineering problems can ...
Metin Katlav, Kazim Turk
wiley   +1 more source

Split‐disk testing of precast ultra‐high performance fiber‐reinforced concrete tubes

Structural Concrete, EarlyView.
Abstract Ultra‐high performance fiber‐reinforced concrete (UHPFRC) has great potential for structural applications involving precast cylindrical shapes, including pipes, silos and stay‐in‐place forms for concrete columns. This study examines the performance of UHPFRC rings under internal pressure simulated using the split‐disk loading method, along ...
Mina Fakeh, Amir Fam
wiley   +1 more source