Effects of aggregate types and softening effect on multiaxial mechanical properties of lightweight aggregate concrete

Yang, Jinbao; Yuan, Ding; Huang, Dainwu; Wang, Qinting

doi:10.1016/j.conbuildmat.2022.128832

Cited by 9 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When cracks appear in nearby lightweight aggregates, they penetrate the mortar and interfacial layers, eventually resulting in a main crack that penetrates the entire specimen to reach a failure state. This is consistent with the conclusions of previous studies [1][2][3][4][5][6]. ii.…”

Section: Discussion Of the Numerical Resultssupporting

confidence: 93%

“…At present, the mechanical properties and damage mechanism of lightweight aggregate concrete are hot topics in the engineering field, and the relationship between its meso-structure and macroscopic mechanical properties is also a cutting-edge research topic in the academic community [1]. Many scholars have studied the mechanical properties and damage modes of lightweight aggregate concrete by controlling experimental variables to measure the relevant mechanical parameters of lightweight aggregate concrete, followed by in-depth and detailed research and analyses [2,3]. For instance, in an experimental work, Guo et al [4] investigated the compressive strength and deformation behavior of basic magnesium sulfate cement-coral aggregate concrete (BMSC-CAC) through experiments and a 3D mesoscopic analysis.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Mechanical Properties and Failure Mechanism of Lightweight Aggregate Concrete Based on Meso Level

2023

View full text Add to dashboard Cite

The relationship between the macroscopic mechanical properties of lightweight aggregate concrete and its microstructure is a hot topic in the discipline of concrete materials. It is very meaningful to provide an efficient numerical analysis method to conduct a meso-level analysis. This study proposes an automatic dissection algorithm and adapts the calculation program of the base force element method to conduct a non-linear damage analysis. In the numerical simulation, three groups of 100 mm × 100 mm × 100 mm specimens were selected for the uniaxial compression experiment and uniaxial tensile experiment, respectively. The average tensile strength of the numerical simulation for the uniaxial compression test was 21.86 MPa. The stress–strain softening curve, stress contour plot, strain contour plot, and damage plot of the light aggregate concrete were also analyzed. These research results provide data for analyzing the failure mechanism of light aggregate concrete and reveal the failure mechanism of light aggregate concrete. At the same time, the reliability of the proposed algorithm is verified. Our aim is to provide a more efficient and accurate analysis of meso-damage in lightweight aggregate concrete, which benefits industries involved in production, construction, and structural engineering.

show abstract

Section: Discussion Of the Numerical Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Analysis of Mechanical Properties and Failure Mechanism of Lightweight Aggregate Concrete Based on Meso Level

2023

View full text Add to dashboard Cite

show abstract

“…With the increase of stress level, the electric flux of concrete first decreases and then increases; the electric flux of concrete with different strength grades has different sensitivity to compressive stress. The lower the strength grade of concrete, the higher the sensitivity to compressive stress; the electric flux of concrete after compressive stress is related to crack recovery, and only the stress level of more than 60% has a significant impact on the electric flux of concrete; the load should be considered in the evaluation of chloride permeability of concrete structures; Jian Hui Yang et al [ 12 ]. Studied the constitutive relationship of concrete under plane stress based on the generalized octahedral theory, and pointed out that the plane constitutive relationship of concrete can be understood through the plane problem of stress-strain space transformation.…”

Section: Introductionmentioning

confidence: 99%

Study on the deterioration characteristics of aeolian sand concrete under the coupling effect of multiple factors in harsh environments

Li,

Gao,

Zhu

et al. 2023

PLoS ONE

View full text Add to dashboard Cite

This study takes the aeolian sand concrete as a research object, uses the relative dynamic elastic modulus to study its macro characteristics, and combines nuclear magnetic resonance、scanning electron microscope to study its pore characteristics and micro morphology under the action of prestress, freeze-thaw and salt intrusion. The results show that with the increase of the amount of aeolian sand, the dynamic elastic modulus of aeolian sand concrete shows a pattern of first decreasing, then increasing, and then decreasing; when no prestress is applied, the porosity of aeolian sand concrete first increases, then decreases, and then continues to increase. Among them, the porosity of aeolian sand concrete with a 40% content of aeolian sand decreases by 0.06% compared to that with a 0% content of aeolian sand, and decreases by 0.003% compared to that with a 60% content of aeolian sand; with the increase of prestress, the porosity of aeolian sand concrete with the same amount of aeolian sand increases gradually with the increase of damage degree. The porosity of concrete with 40% aeolian sand content increases by 0.33% when the damage degree is 0.0 compared to 0.3, with a 6.31% increase in the number of multi damage pores; under the coupling effect of multiple factors, when the amount of aeolian sand is 40%, the damage degree of the four groups of aeolian sand concrete before and after the coupling effect is 0.0, 0.1, 0.2, and 0.3, respectively, increases by 25.8%, 32.2%, 73.8%, and 85.8%, respectively; under the coupling effect of multiple factors, the content of aeolian sand is 60%, the damage degree is 0.2 and 0.3 groups, and the content of aeolian sand is 20%, the damage degree is 0.3 groups, which does not meet the standard requirements; under the coupling action of stress, freeze-thaw, salt intrusion and the amount of aeolian sand, the filling effect of aeolian sand on the internal pores of aeolian sand concrete decreases first, then increases, and then decreases with the increase of the amount of aeolian sand. The filling effect is further weakened after the action of stress. After the superposition of freeze-thaw and salt intrusion, the coupling effect of water and salt solution in frost heaving medium makes the variation law and range of physical and chemical characteristics of aeolian sand concrete show a great difference.

show abstract

Enhancement of impact resistance for low water/binder cementitious composites (LWBCC) based on porous aggregate: From the perspective of macroscopic and microscopic

Liu

ChunYuan

Yin

et al. 2023

Construction and Building Materials

View full text Add to dashboard Cite

Effects of aggregate types and softening effect on multiaxial mechanical properties of lightweight aggregate concrete

Cited by 9 publications

References 27 publications

Analysis of Mechanical Properties and Failure Mechanism of Lightweight Aggregate Concrete Based on Meso Level

Analysis of Mechanical Properties and Failure Mechanism of Lightweight Aggregate Concrete Based on Meso Level

Study on the deterioration characteristics of aeolian sand concrete under the coupling effect of multiple factors in harsh environments

Enhancement of impact resistance for low water/binder cementitious composites (LWBCC) based on porous aggregate: From the perspective of macroscopic and microscopic

Contact Info

Product

Resources

About