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Article
Construction & Building Technology
Dengwu Jiao et al.
Summary: This study experimentally validated the clustering of nano-Fe3O4 particles in cementitious paste under magnetic fields, quantifying the Fe-element patterns using COV values. The linear relationship between the magneto-rheological effect of cementitious pastes and the relative change of COV provided quantitative validation of magnetic clustering.
CEMENT AND CONCRETE RESEARCH
(2021)
Article
Construction & Building Technology
Dengwu Jiao et al.
Summary: The apparent viscosity of a cementitious-like suspension can be significantly increased by applying an external magnetic field, with higher field strengths resulting in faster and more pronounced responses. Changes in the magnetic field lead to sudden alterations in the apparent viscosity, mainly due to the formation or disintegration of magnetic clusters.
MATERIALS AND STRUCTURES
(2021)
Article
Construction & Building Technology
Yaxin Tao et al.
Summary: This paper discusses how to achieve stiffening control of concrete in applications such as grouting, shotcrete, and 3D concrete printing using accelerators, including the mechanisms of accelerators, inline mixing processes, and the problems and challenges faced in these applications.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Dengwu Jiao et al.
Summary: The effects of concentration and particle size of nano-Fe3O4 particles on the evolution of structural build-up of cementitious paste under magnetic field were investigated experimentally and verified theoretically. The magnetic field enhances the liquid-like properties and magneto-rheological effect of the cementitious paste with nano-Fe3O4 particles. The movement velocity of nano-Fe3O4 particles is proportional to the increase rate of loss modulus in the early age of the paste.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Dengwu Jiao et al.
Summary: Experimental investigation on the magneto-rheological responses of cement paste with nano-Fe3O4 particles revealed the potential of nanoparticles to form magnetic clusters under applied magnetic fields, leading to liquid-like behavior of suspensions. The solid-like property becomes more dominant with magnetizing time, and rheological properties significantly influence the magneto-rheological responses. Calculated magnetic yield parameter and nanoparticle movement velocity are useful indicators for evaluating the effect in cementitious paste.
CEMENT & CONCRETE COMPOSITES
(2021)
Review
Construction & Building Technology
Dengwu Jiao et al.
Summary: Thixotropic structural build-up is an intrinsic property of fresh cementitious materials, which plays a significant role in the pumpability, stability, and formwork filling of concrete. Evaluation of the evolution of static yield stress and storage modulus can be used to assess the structural build-up of fresh cementitious materials. Increasing particle volume fraction, decreasing surface coverage, and reducing maximum packing fraction have a positive effect on the increase in structural build-up.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Construction & Building Technology
Dengwu Jiao et al.
CEMENT AND CONCRETE RESEARCH
(2019)
Article
Construction & Building Technology
Qiang Yuan et al.
CONSTRUCTION AND BUILDING MATERIALS
(2019)
Article
Construction & Building Technology
Lex Reiter et al.
CEMENT AND CONCRETE RESEARCH
(2018)
Article
Construction & Building Technology
Geert De Schutter et al.
CEMENT AND CONCRETE RESEARCH
(2018)
Article
Mechanics
Jason P. Rich et al.
