The influence of aging on the fracture characteristics of recycled aggregate concrete through three methods

Fallahnejad, Hossein; Davoodi, Mohammadreza; Nikbin, Iman M.

doi:10.1002/suco.202000119

Cited by 21 publications

(7 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to the destruction of natural resources, it imposes a lot of solid waste in the environment. 19,29,32,33,38,39,42,56,62 Abbreviations: AC, curing age; ADR, additive regression; B, total binder; BAG, bagging predictors; CA, coarse aggregate; CS, compressive strength; DT, decision table; GF, glass fiber; GPR, Gaussian process regression; LWL, locally weighted linear; M5R, M5-Rules; MLP, multilayer perceptron; RA, recycled aggregates; RAC, recycled aggregate concrete; REPT, reduced-error pruning tree; RF, random forest; SF, silica-fume; SSD, saturated surface dried; SVR, support vector regression; W, water.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Retracted: Predicting the compressive strength of modified recycled aggregate concrete

Yang

Feng

Esmaeili‐Falak

2022

Structural Concrete

View full text Add to dashboard Cite

Reuse and recycling of construction wastes effectively prevent further destruction of the environment and nature due to the construction industry. One of the conventional methods is the reapplication of recycled aggregates (RAs) in concrete mix design and construction. Compressive strength (CS) is a considerable representation of the mechanical properties of recycled aggregate concrete (RAC). The present study is divided into two parts of experimental and predicting. In the laboratory studies phase, RA was used with 100% replacement. Due to the proven defects in RAC, glass fibers and silica fume (variables) have been used to compensate for these defects. Different mixing designs were used to construct concrete samples, and then the CS of each specimen was measured in the laboratory. Afterward, these data were used as training and testing in various conventional, ensembled and hybrid models as the tree-based learning algorithms, rules, Lazy-learning Algorithms, Functions, and Meta classifiers. Considering the applied performance statistical criteria (R 2 , root mean squared error, mean absolute error, and mean absolute percentage error), all models have provided excellent and acceptable results, which the precision of the multilayer perceptron single model and additive regression-random Forest hybrid model have the best agreement with measured values of CS of RAC.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Most of the solid waste of countries is usually caused by construction and demolition in the construction industry. In addition to the destruction of natural resources, it imposes a lot of solid waste in the environment 19,29,32,33,38,39,42,56,62 …”

Section: Introductionmentioning

confidence: 99%

Retracted: Predicting the compressive strength of modified recycled aggregate concrete

Yang

Feng

Esmaeili‐Falak

2022

Structural Concrete

View full text Add to dashboard Cite

show abstract

“…Concrete is a synthetic material that varies significantly in mechanical characteristics during its manufacturing. The fracture behaviors of concrete are influenced by its age, and the fracture toughness at different ages

t

is assessed by

\frac{K_{I C}}{K_{I C 28}} = m {((), \frac{t}{28})}^{n},

where

K_{I C 28}

K_{I C}

at 28 days,

m

and

n

mean the dimensionless constants, which are

m = 1

n = 0.1307

in the literature, 60 and

m = 0.65

n = 0.1297

in the literature 61 . As illustrated in Figure 16B, it is observed that the fracture load envelope enlarges with the age of concrete.…”

Section: Fracture Criteria Of Concretementioning

confidence: 99%

“…where K IC28 is K IC at 28 days, m and n mean the dimensionless constants, which are m ¼ 1, n ¼ 0:1307 in the literature, 60 and m ¼ 0:65, n ¼ 0:1297 in the literature. 61 As illustrated in Figure 16B, it is observed that the fracture load envelope enlarges with the age of concrete.…”

Section: Fracture Criteria Of Concretementioning

confidence: 99%

Fracture criteria and initiation mechanism of concrete based on material configurational mechanics

Wang,

Feng

2024

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

In this study, the interaction force between an in‐plane elliptical inclusion and a crack is evaluated using the Eshelby equivalent inclusion and material configurational force method. The toughening effect of coarse aggregates on concrete is investigated. The fracture criteria for mixed‐mode cracks based on the characteristics of the crack‐tip plastic zone assessed by the principal configurational stress difference are proposed and verified by experimental results in the literature. The fracture probability is then used to improve the fracture criteria, and the dimensionless factor associated with stress intensity factors is introduced to determine the fracture probability. Additionally, the volume fraction of coarse aggregates, the age and fatigue life of concrete are considered in the present fracture criteria. Theoretical studies show that the interaction between a crack and a hard or soft inclusion exhibits mutual repulsion and attraction. The size and shape of the crack‐tip plastic zones assessed by the Mises stress and the principal configurational stress difference are essentially the same. The fracture load envelopes increase with the increase in the volume fraction of coarse aggregates and the age of concrete and shrink with the increase in the life ratio.

show abstract

“…In the case of the test method to investigate the fracture characteristics, various test methods have been applied according to the research purpose and the characteristic of the material. reepoint bending test is commonly used to investigate the mode I fracture characteristics of material such as concrete [18,19]. Based on the test results, stress intensity factor and fracture energy were calculated to investigate effects of fines and temperature on the fracture characteristics of frozen sand.…”

Section: Research Significancementioning

confidence: 99%

The Effect of Fines and Temperature on the Mode I Fracture Characteristics of the Frozen Sand

Hwang¹,

Cho

2022

Advances in Civil Engineering

View full text Add to dashboard Cite

In this research, the three-point bending tests were conducted using frozen sand specimen of 0, 5, 10, and 15% fine contents with specified notch under −5, −10, and −15°C condition to analyse the effects of fine contents and temperature on the mode I fracture characteristics of the frozen sand. Three-point bending tests were performed using the standard test method of other materials such as metal and concrete. In order to investigate the effect of fine and temperature on the fracture characteristics of the frozen sand, the stress intensity factor and fracture energy were calculated using three-point bending test results. Based on the test results, fine contents and temperature can affect the brittle and ductile responses of the frozen sand. Furthermore, the fracture toughness of frozen sand increase with the fine contents’ increase and the temperature decrease. Fracture energy required for the crack initiation can be dominated by the fracture behaviour and brittle and ductile response.

show abstract

The influence of aging on the fracture characteristics of recycled aggregate concrete through three methods

Cited by 21 publications

References 49 publications

Retracted: Predicting the compressive strength of modified recycled aggregate concrete

Retracted: Predicting the compressive strength of modified recycled aggregate concrete

Fracture criteria and initiation mechanism of concrete based on material configurational mechanics

The Effect of Fines and Temperature on the Mode I Fracture Characteristics of the Frozen Sand

Contact Info

Product

Resources

About