Mesoscopic numerical simulation of dynamic size effect on the splitting-tensile strength of concrete

2019 ◽  
Vol 209 ◽  
pp. 317-332 ◽  
Author(s):  
Liu Jin ◽  
Wenxuan Yu ◽  
Xiuli Du ◽  
Wangxian Yang
Keyword(s):  
Numerical Simulation ◽  
Tensile Strength ◽  
Size Effect ◽  
Splitting Tensile Strength

Experimental Research on the Relationship between Splitting Tensile Strength and Compressive Strength of Ceramisite Concrete

2011 ◽  
Vol 374-377 ◽  
pp. 1434-1437 ◽  
Author(s):  
Wei Jun Yang ◽  
Peng Wang
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Size Effect ◽  
Experimental Research ◽  
Splitting Tensile Strength ◽  
Axial Compressive Strength ◽  
The Relationship

Ceramisite concrete was charateristic of size effect as common concret. Through the experimentation of size effect on cubic compressive strength and axial compressive strength,and analysed and research coefficient of size effect by classical theoretics,elicit size effect of ceramisite concrete.

Analysis and Comparison on Mechanical Properties between Full-Graded and Wet-Screened Concretes

2010 ◽  
Vol 168-170 ◽  
pp. 426-429 ◽  
Author(s):  
Shi Hua Zhou ◽  
Hua Quan Yang ◽  
Yun Dong
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Elastic Modulus ◽  
Size Effect ◽  
Coarse Aggregate ◽  
Concrete Specimen ◽  
Hydraulic Engineering ◽  
Splitting Tensile Strength ◽  
Curing Condition

Based on typical hydraulic engineering, difference of performances between full-graded and wet-screened concrete was studied. Results showed that owing to the gradation effect and skeleton effect of coarse aggregate and the size effect of specimen, full-graded concrete was 105%, 75%, 65% and 115% in compressive strength, splitting tensile strength, ultimate tension and compressive elastic modulus respectively, compared with wet-screened concrete. Under the same curing condition, compressive strength of wet-screened standard concrete specimen can represent the actual compressive strength of full-graded concrete.

scholarly journals Inverse Analysis of Concrete Meso-constitutive Model Parameters Considering Aggregate Size Effect

2020 ◽  
Vol 27 (1) ◽  
pp. 397-404
Author(s):  
Lixia Guo ◽  
Song Li ◽  
Ling Zhong ◽  
Lei Guo ◽  
Lunyan Wang
Keyword(s):  
Numerical Simulation ◽  
Genetic Algorithm ◽  
Tensile Strength ◽  
Elastic Modulus ◽  
Constitutive Model ◽  
Size Effect ◽  
Aggregate Size ◽  
Model Parameters ◽  
Random Aggregate ◽  
Mortar Matrix

AbstractThe meso numerical simulation has become an important method to study the characteristics of materials; however, the key to its further application is determining the parameters of meso-constitutive model. Considering that the meso-scale parameters of materials are hard to measure, this paper took into account the aggregate size effect and proposed a meso-parameter identification method by combining random aggregate numerical simulation and genetic algorithm. First, a random aggregate model of concrete was established, and its meso-model parameters were analyzed. The Morris method was used to analyze the sensitivity of meso-component parameters to the macro-responses, and results showed that the elastic modulus of mortar matrix, interface and large aggregates had a great effect on the peak strain and that the elastic modulus, Poisson’s ratio and tensile strength of interface and mortar matrix, as well as the Poisson’s ratio of large aggregates and the elastic modulus of small aggregates all had an effect on the peak stress, among which the interface tensile strength produced the greatest effect. Second, a parametric inversion and optimization function was established. The uniaxial compression numerical simulation test and genetic algorithm were combined to invert the meso-parameters, and results showed that compared with the single-aggregate parameter inversion curve, the multi-aggregate inversion stress-strain curve was much closer to the measured curve. That was because the aggregates of small size had lower elastic modulus, easing the stress concentration at the interface between aggregates and cement stone, and delaying the formation and growth of cracks.

scholarly journals Practical Prediction Models of Tensile Strength and Reinforcement-Concrete Bond Strength of Low-Calcium Fly Ash Geopolymer Concrete

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 875
Author(s):  
Chenchen Luan ◽  
Qingyuan Wang ◽  
Fuhua Yang ◽  
Kuanyu Zhang ◽  
Nodir Utashev ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fly Ash ◽  
Bond Strength ◽  
Prediction Models ◽  
Splitting Tensile Strength ◽  
Geopolymer Concrete ◽  
Structural Factors ◽  
Test Results ◽  
Portland Cement Concrete ◽  
Low Calcium

There have been a few attempts to develop prediction models of splitting tensile strength and reinforcement-concrete bond strength of FAGC (low-calcium fly ash geopolymer concrete), however, no model can be used as a design equation. Therefore, this paper aimed to provide practical prediction models. Using 115 test results for splitting tensile strength and 147 test results for bond strength from experiments and previous literature, considering the effect of size and shape on strength and structural factors on bond strength, this paper developed and verified updated prediction models and the 90% prediction intervals by regression analysis. The models can be used as design equations and applied for estimating the cracking behaviors and calculating the design anchorage length of reinforced FAGC beams. The strength models of PCC (Portland cement concrete) overestimate the splitting tensile strength and reinforcement-concrete bond strength of FAGC, so PCC’s models are not recommended as the design equations.

scholarly journals Effect of length of steel fibers of waste tires on splitting tensile strength of concrete

2019 ◽  
Vol 276 ◽  
pp. 01003 ◽  
Author(s):  
Aneel Kumar Hindu ◽  
Tauha Hussain Ali ◽  
Agha Faisal Habib
Keyword(s):  
Tensile Strength ◽  
Splitting Tensile Strength ◽  
Steel Fibers ◽  
Waste Tires ◽  
Concrete Cylinders ◽  
Proper Disposal

The increase in volume of vehicles ultimately increases the number of waste tires. The proper disposal or reutilization of waste tires is a challenge. This study is aimed to utilize the steel fibers of waste tires as reinforcement in concrete. Concrete cylinders were cast with addition of different percentages of steel fibers (0-2%) and length (10-20 mm). The fresh and hard properties of concrete reinforced with different percentages of steel fibers and lengths were observed. It is seen that splitting tensile strength of concrete increased with increase in the length of fiber and with the increase in the percentage of fiber. The inclusion of the fibers in concrete causes the reduction in the workability of concrete.

scholarly journals Material-removing machining wastes as a filler of a polymer concrete (industrial chips as a filler of a polymer concrete)

2021 ◽  
Vol 28 (1) ◽  
pp. 343-351
Author(s):  
Norbert Kępczak ◽  
Radosław Rosik ◽  
Mariusz Urbaniak
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Young’S Modulus ◽  
Industrial Waste ◽  
Splitting Tensile Strength ◽  
Polymer Concrete ◽  
Strength Parameters ◽  
Basic Parameters ◽  
Natural Fillers

Abstract The paper presents an impact of the addition of industrial machining chips on the mechanical properties of polymer concrete. As an additional filler, six types of industrial waste machining chips were used: steel fine chips, steel medium chips, steel thick chips, aluminium fine chips, aluminium medium chips, and titanium fine chips. During the research, the influence of the addition of chips on the basic parameters of mechanical properties, i.e., tensile strength, compressive strength, splitting tensile strength, and Young’s modulus, was analyzed. On the basis of the obtained results, conclusions were drawn that the addition of chips from machining causes a decrease in the value of the mechanical properties parameters of the polymer concrete even by 30%. The mechanism of cracking of samples, which were subjected to durability tests, was also explored. In addition, it was found that some chip waste can be used as a substitute for natural fillers during preparation of a mineral cast composition without losing much of the strength parameters.

Sign in / Sign up

Export Citation Format

Share Document