Results 41 to 50 of about 23,909 (250)

A review of sample preparation and its influence on pH determination in concrete samples [PDF]

, 2017
If we are to monitor the chemical processes in cementitious materials, then pH assays in the pore solutions of cement pastes, mortars, and concretes are of key importance.
Aguado de Cea, Antonio, Manso Blanco, Sandra   +1 more
core   +2 more sources

Effects of Chloride ions on Carbonation Rate of Hardened Cement Paste by X-ray CT Techniques [PDF]

, 2016
Corrosion of steel bars in concrete structures is initiated as a result of concrete carbonation and/or chloride intrusion, and influenced by their interaction.
Castellote, Du, Han, Han, Han, Haque, Hobbes, Jian-bin Chen, Jun-zhe Liu, Kuosa, Kwon, Liu, Lu, Meira, Ming-fang Ba, Pedro, Ramezanianpour, Reddy, Rougelot, Song, Song, Song, Sugirama, Suryavanshi, Torgal, Tritthart, Vilain, Yang, Yin-gang Du, Yoon, Younsi, Zhi-min He, Zhou, Zitrou   +33 more
core   +1 more source

Effects of CaO-based expansive agent on carbonation resistance of marine concrete

Case Studies in Construction Materials
Marine concrete contains a high volume of supplementary cementitious materials, which benefits low-carbon concrete production. However, they may also increase the risk of cracking and accelerate the carbonation due to the pozzolanic reaction ...
Jian Zhang, Tengfei Hua, Yuefeng Ma, Yufei Liu, Jinhui Liu, Jin Zhu, Xiangsheng Chen   +6 more
doaj   +1 more source

Preliminary study of the effect of carbonation curing on geopolymers

Revista IBRACON de Estruturas e Materiais, 2023
Carbonation curing differs from weathering carbonation since it is performed intentionally at the early ages of cement hydration. This cure involves applying different levels of CO2 (5% to 99%) to concrete for a short period of time, usually followed by ...
Neusa Aparecida Munhak Beltrame, Ronaldo Alves de Medeiros-Junior, Roberto Luiz Dias, Franky Bruno Witzke   +3 more
doaj   +1 more source

Accelerated and natural carbonation of concretes with internal curing and shrinkage/viscosity modifiers [PDF]

, 2015
In many parts of the world, corrosion of reinforcing steel in concrete induced by carbonation of the concrete continues to be a major durability concern.
Bentz, Dale P., Durán Herrera, Alejandro, Mendoza Rangel, José Manuel, Santos Rodríguez, Edgar Ulises de los, Valdez, Pedro, Vázquez, F.   +5 more
core   +1 more source

Improving carbonation resistance, strength, and microstructure of concrete through compression casting

Case Studies in Construction Materials
This study addresses the significant issue of steel corrosion in reinforced concrete structures, which incurs billions of dollars in annual costs globally, with a substantial portion attributed to concrete carbonation.
Jun-Ru Li, Syed Minhaj Saleem Kazmi, Xun Wang, Yu-Fei Wu   +3 more
doaj   +1 more source

Optimal Mixture Design of Low-CO2 High-Volume Slag Concrete Considering Climate Change and CO2 Uptake

International Journal of Concrete Structures and Materials, 2019
High-volume slag (HVS) can reduce the CO2 emissions of concrete, but increase the carbonation depth of concrete. In particular, because of the effects of climate change, carbonation will accelerate.
Han-Seung Lee, Seung-Min Lim, Xiao-Yong Wang   +2 more
doaj   +1 more source

Building like a Coral—Parallelized, Multiscale Biofabrication

Advanced Materials, EarlyView.
Corals build stiff, strong, and inherently circular skeletal materials under resource‐ and energy‐limited conditions—offering blueprints for transformative materials. We synthesize the current understanding of coral biomineralization and reframe coral growth as a multiscale, parallelized biofabrication process.
Asma Rehman, Marta Peña Fernández, Kristina K. Beck, Gavin L. Foster, Sebastian J. Hennige, Uwe Wolfram   +5 more
wiley   +1 more source

Verification of Interaction Between Cl⁻ Erosion and Carbonation in Marine Concrete

Journal of Marine Science and Engineering
Marine concrete frequently experiences performance degradation due to the combined effects of chloride ion (Cl−) erosion and carbonation. While many studies have examined the separate effects of Cl− erosion and carbonation, their combined impact on ...
Maohua Zhang, Lin Du, Ronghua Xu
doaj   +1 more source

Concrete Carbonation of Deep Burial Storage Constructions under Model Aging Conditions

Buildings, 2023
To ensure the safe operation of concrete structures of deep-burial storages, it is necessary to research the degradation mechanisms of such structures.
Vyacheslav Medvedev, Andrey Pustovgar, Aleksey Adamtsevich, Liubov Adamtsevich   +3 more
doaj   +1 more source