Moisture diffusion coefficient of concrete under different conditions

F Zhou, W Li, Y Hu, L Huang, Z Xie, J Yang, D Wu… - Buildings, 2023 - mdpi.com
Humidity change in concrete is the leading cause of concrete shrinkage. Moreover, the
moisture diffusion coefficient of concrete is an essential parameter for assessing and …

Extended microprestress-solidification theory for long-term creep with diffusion size effect in concrete at variable environment

S Rahimi-Aghdam, ZP Bažant… - Journal of Engineering …, 2019 - ascelibrary.org
The solidification theory has been accepted as a thermodynamically sound way to describe
creep reduction due to deposition of hydrated material in the pores of concrete. The concept …

Tests and prediction model for time-dependent internal relative humidity of recycled aggregate concrete due to self-desiccation

X Chen, H Zhang, Y Geng, YY Wang - Construction and Building Materials, 2022 - Elsevier
The concrete internal relative humidity (RH) is the direct evidence of internal curing effect,
controlling concrete shrinkage deformation and also affecting the strength development …

Prediction of autogenous shrinkage in concrete from material composition or strength calibrated by a large database, as update to model B4

M Rasoolinejad, S Rahimi-Aghdam, ZP Bažant - Materials and Structures, 2019 - Springer
In modern concretes, the autogenous shrinkage, ie, the shrinkage of sealed specimens, is
much more important than it is in traditional concretes. It dominates the shrinkage of thick …

[HTML][HTML] Predictive hydration model of Portland cement and its main minerals based on dissolution theory and water diffusion theory

T Qi, W Zhou, X Liu, Q Wang, S Zhang - Materials, 2021 - mdpi.com
Efficient and accurate cement hydration simulation is an important issue for predicting and
analyzing concrete's performance evolution. A large number of models have been proposed …

Unsaturated nanoporomechanics

H Nguyen, S Rahimi-Aghdam… - Proceedings of the …, 2020 - National Acad Sciences
Although some important advances in the modeling of sorption and hygrothermal
deformations of nanoporous materials such as hydrated cement paste, shale, coal, and …

Century-long expansion of hydrating cement counteracting concrete shrinkage due to humidity drop from selfdesiccation or external drying

S Rahimi-Aghdam, E Masoero, M Rasoolinejad… - Materials and …, 2019 - Springer
A physically based model for auotgenous shrinkage and swelling of portland cement paste
is necessary for computation of long-time hydgrothermal effects in concrete structures. The …

Effect of internal curing on shrinkage of calcium sulfoaluminate cement concrete and calculation of the shrinkage stress at early age considering creep

Z Fu, G Ke, X Kong, J Zhang - Journal of Building Engineering, 2023 - Elsevier
Abstract Effect of internal curing on shrinkage of calcium sulfoaluminate cement (CSA)
concrete in both sealed condition and dry/wet cycles was studied using four CSA concretes …

Drying of mortar at ambient temperature studied using high resolution neutron tomography and numerical modeling

HC Sleiman, A Tengattini, M Briffaut, B Huet… - Cement and Concrete …, 2022 - Elsevier
The drying of cement-based materials, naturally occurring in most civil engineering contexts,
affects their thermal, hydraulic and mechanical properties and is a leading contributor to the …

Thermal stress state of reinforced concrete floor slab

M Barabash, M Romashkina… - Strength of materials …, 2019 - omtc.knuba.edu.ua
The article provides research of the stress-strain state of a reinforced concrete floor slab
under fire conditions according to refined method. The finite element model of the slab is …