Prediction model for carbonation depth of concrete subjected to freezing-thawing cycles

Bayesian Inference for Prediction of Carbonation Depth of Concrete Using MCMC

Bayesian inference of model parameters for the time dependent carbonation depth of concrete is presented. The statistical model is assumed to have a form of where implies the carbonation coefficient and stands for the modeling error which is assumed to have a normal distribution with zero mean and unknown variance. By the use of existing data for the natural outdoor exposed concrete, the poster...

Research on Microscopic Pore Structure and Permeability of Air-Entrained Flyâ•fiAsh Concrete Subjected to Freezing and Thawing Action

In this paper, rapid freezing and thawing test of air-entrained fly–ash concrete was carried out. Gas adsorption of concrete pores, mass loss, dynamic elastic modulus, and chloride diffusion coefficient of concrete after different freezing and thawing cycles was tested; scanning electron image was used to study the microscopic pore structure of the specimens. Results show that after certain fre...

Mechanical Properties and Freezing and Thawing Resistance of Concrete Incorporating

Modelling the Stability of Asphalt Concrete with Fuzzy Logic and Statistical Methods for Various Freezing and Thawing Cycles

The stability of asphalt concrete under the effects of freezing and thawing was studied experimentally, and the experimental test results were modelled using fuzzy logic and statistical methods. The stability was investigated experimentally using the Marshall and ultrasound methods. Asphalt core samples 10 cm in diameter were alternately frozen (–20°C for 16 hr) and thawed (16°C for 8 hr) for 5...

Effects of Crack and Climate Change on Service Life of Concrete Subjected to Carbonation

Carbonation is among the primary reasons for the initiation of the corrosion of steel rebar in reinforced concrete (RC) structures. Due to structural loading effects and environmental actions, inevitable cracks have frequently occurred in concrete structures since the early ages. Additionally, climate change, which entails increases in CO2 concentration and environmental temperature, will also ...