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A Study for Improving Compressive Strength of

23.04.2020  The compressive strength was increased up to 60% with 150 cycles, a dose of 0.5% of SP and no FA content at the age of 56 days. The dose of SP can be cut down by a maximum of 40% to 50% in cementitious mortar. the workability was enhanced by a percentage of 70%.

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Modeling of Compressive Strength for Self

20.05.2016  The coefficient of determination (R²) for the relationship between the predicted and experimental compressive strengths was 0.9486, which shows the higher degree of accuracy of the network pattern. Furthermore, the predicted compressive strength was found very close to the experimental compressive strength during the testing process of the ANN model. The absolute and

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PubMed

Materials (Basel). 2019 Feb 1;12(3):458. doi: 10.3390/ma12030458. ... 10, and 20%. The compressive strength test indicates that the addition of the HT powder increases the compressive strength of the paste after seven days of curing, and the highest compressive strength is obtained with the 10% HT substitution, regardless of whether the w/b ratio is 0.5 or 0.2. X-ray fluorescence (XRF), X-ray ...

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Compressive Strength Prediction of PVA Fiber

22.01.2020  In this study, a method to optimize the mixing proportion of polyvinyl alcohol (PVA) fiber-reinforced cementitious composites and improve its compressive strength based on the Levenberg-Marquardt backpropagation (BP) neural network algorithm and genetic algorithm is proposed by adopting a three-layer neural network (TLNN) as a model and the genetic algorithm as an optimization tool. A

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Generalized Fracture Toughness and Compressive

06.12.2017  In the course of the experiments, compressive strength of concrete and fracture toughness for: I (tensile), II (in-plane shear) and III (anti-plane shear) models of cracking were measured. The tests determined the effect of age of concretes modified with LCFA on the analyzed parameters. The experiments were carried out after: 3, 7, 28, 90, 180 and 365 days of curing. Fracture toughness of

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Artificial Intelligence Approaches for Prediction of ...

The results showed that both ANN and ANFIS models have strong potential for predicting the compressive strength of GPC but ANFIS (MAE = 1.655 MPa, RMSE = 2.265 MPa, and R² = 0.879) is better than ANN (MAE = 1.989 MPa, RMSE = 2.423 MPa, and R² = 0.851). Sensitivity analysis was then carried out, and it was found that reducing one input parameter could only make a small change to the

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Modeling of Hydration, Compressive Strength,

26.01.2017  Systematic evaluations of hydration kinetics, compressive strength development, and carbonation resistance are crucial for the rational use of limestone. This study presents a hydration-based model for evaluating the influences of limestone on the strength and carbonation of concrete. First, the hydration model analyzes the dilution effect and the nucleation effect of limestone during the hydration

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Deformation and Compressive Strength of Steel

Compared with ordinary concrete (OC), SMC's 28 days compressive strength increased by 19.8%. Secondly, the influence of MgO and steel fibers with different contents on the self-volumetric deformation of concrete was compared through the experiment. The results showed that as a result of the hydration expansion of MgO, MC and SMC both showed obvious expansion, and their 190 days expansion was

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A Study for Improving Compressive Strength of

23.04.2020  The compressive strength was increased up to 60% with 150 cycles, a dose of 0.5% of SP and no FA content at the age of 56 days. The dose of SP can be cut down by a maximum of 40% to 50% in cementitious mortar. the workability was enhanced by a percentage of 70%.

More

Modeling of Compressive Strength for Self

20.05.2016  The coefficient of determination (R²) for the relationship between the predicted and experimental compressive strengths was 0.9486, which shows the higher degree of accuracy of the network pattern. Furthermore, the predicted compressive strength was found very close to the experimental compressive strength during the testing process of the ANN model. The absolute and

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Materials Free Full-Text Compressive Strength

Compared to the BFRP (basalt fiber reinforced polymer) bars, modification has been introduced in HFRP bars consisting of swapping basalt fibers with carbon fibers. One of the most important mechanical properties of FRP bars is compressive strength, which determines the scope of reinforcement in compressed reinforced concrete elements (e.g., column). The compression properties of FRP bars

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Generalized Fracture Toughness and

06.12.2017  In the course of the experiments, compressive strength of concrete and fracture toughness for: I (tensile), II (in-plane shear) and III (anti-plane shear) models of cracking were measured. The tests determined the effect of age of concretes modified with LCFA on the analyzed parameters. The experiments were carried out after: 3, 7, 28, 90, 180 and 365 days of curing. Fracture toughness of

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Evaluation of Residual Compressive Strength

The compressive loading test results showed that the compressive strengths were affected by the damaged width within a certain range. In addition, finite element analysis (FEA) was conducted with various parameters to determine the effects of the damage on the failure mode and compressive strength of the stub column. From the FEA results, the compressive strength was decreased

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Compressive Behavior of Fiber-Reinforced

In this paper, the compressive behavior of fiber-reinforced concrete with end-hooked steel fibers has been investigated through a uniaxial compression test in which the variables were concrete compressive strength, fiber volumetric ratio, and fiber aspect ratio (length to diameter). In order to minimize the effect of specimen size on fiber distribution, 48 cylinder specimens 150 mm in diameter and 300 mm in

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Deformation and Compressive Strength of Steel

Compared with ordinary concrete (OC), SMC's 28 days compressive strength increased by 19.8%. Secondly, the influence of MgO and steel fibers with different contents on the self-volumetric deformation of concrete was compared through the experiment. The results showed that as a result of the hydration expansion of MgO, MC and SMC both showed obvious expansion, and their 190 days expansion was

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Stability and strength of covalent crystals under

13.12.2012  Values of the compressive strength under superimposed transverse stresses are of particular interest since the triaxiality of a stress state in a DAC plays an important role in stability of the lattice. In addition, simple tests of elastic stability will be performed for the three crystals under uniaxial loading (both tensile and compressive) in all the three crystallographic directions.

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(PDF) Compressive Strength of Lightweight

Compressive strength of concrete decreases with the increase in foam Limestone aggregate content; however specimens show different workability and in consequence porosity of lightweight concrete.

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Flexural Strength of Glass Carbomer Cement and ...

Results: Fuji IX showed a mean flexural strength of 25.14 ± 13.02 versus 24.27 ± 12.57 MPa for GCP. There was no significant statistical difference between both materials when compared under storage media. Both materials showed the highest value for flexural strength at 2

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Deformation and Compressive Strength of Steel

The results showed that the compressive strength of s Deformation and Compressive Strength of Steel Fiber Reinforced MgO Concrete Materials (Basel). 2019 Nov 4;12(21):3617. doi: 10.3390/ma12213617. Authors Feifei Jiang 1 2 , Zhongyang Mao 3 , Min Deng 4 , Dawang Li 5 Affiliations 1 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials

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Compressive Behavior of Fiber-Reinforced

Materials (Basel). 2015 Mar 27;8(4):1442-1458. doi: 10.3390/ma8041442. ... It was also shown that the strain at the compressive strength generally increased along with an increase in the fiber volumetric ratio and fiber aspect ratio, while the elastic modulus decreased. With consideration for the effect of steel fibers, a model for the stress-strain relationship of SFRC under compression is ...

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Long-Term Compressive Strength Development

Materials (Basel). 2021 Feb; 14(3): 580. Published online 2021 Jan 26. doi: 10.3390/ma14030580. PMCID: PMC7865930. PMID: 33530586. Long-Term Compressive Strength Development of Steel Fiber Shotcrete from Cores Based on Accelerator Types at Tunnel Site. Kyong Ku Yun, 1 Seunghak Choi, 1 Taeho Ha, 1 Seong Kwon Kim, 2 Mohammad Shakhawat Hossain, 1, * and Seungyeon Han 3, *

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(PDF) Compressive Strength of Lightweight

Materials (Basel). 2017; 10 (12):1354 [7] Rumsys D, Spundulis E, Bacinskas D, Kaklauskas G. Compressive strength . and durability properties of structural. lightweight concrete with fine expanded ...

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Comparison of Analytical Approaches

Materials (Basel, Switzerland), 11 Dec 2018, 11(12) DOI: 10.3390/ma11122517 PMID: 30544996 PMCID: PMC6317175. Free to read use . Share this article Share with email Share with twitter Share with linkedin Share with facebook. Abstract . Common analytical models to predict the unidirectional compressive strength of fibre reinforced polymers are analysed in terms of their accuracy. Several ...

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The Effect of Particle Shape on Sintering Behavior

Materials (Basel). 2018 Jul 4;11(7):1137. doi: 10.3390/ma11071137. ... were examined for the sintering behavior and compressive strength of partially sintered porous alumina. While both the spherical and disk-like particles were packed well to the relative density of 61.2⁻62.3%, the packing density of rod-like particles was only 33.5%. The sintering rate of alumina particles increased in the ...

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Influence of α-Calcium Sulfate Hemihydrate on

This study focused on the quick initial setting time and the expansion strain that occurs during the early aging of α-calcium sulfate hemihydrate (αHH) and examined the setting, compressive strength, and shrinkage strain of αHH-replaced cement mortar. The results show that the initial setting time s

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Stability and strength of covalent crystals under

13.12.2012  Values of the compressive strength under superimposed transverse stresses are of particular interest since the triaxiality of a stress state in a DAC plays an important role in stability of the lattice. In addition, simple tests of elastic stability will be performed for the three crystals under uniaxial loading (both tensile and compressive) in all the three crystallographic directions.

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(PDF) Estimation of the Compressive Strength of

compressive, bending or bursting strength tests of corrugated board. Another important Another important material property to examine is also a humidity , which has a big impact on the box strength.

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Influence of Selected Factors on the Relationship between ...

compressive strength of concrete is presented in [27]. The authors demonstrate that the main factors which affect the relationship between static and dynamic elastic modulus are aggregate volume ...

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compressive strength of bazelt – Grinding Mill

Uniaxial Compressive Strength of Composite Rock Material with respect to Shale Thickness Ratio and Moisture ... » Learn More. compressive strength of bazelt. compressive strength for these concrete grade 10 15. Compressive strength of concrete cubes.By this single test one judge that whether Concreting has been done ... » Learn More

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(PDF) Compressive Strength of Lightweight

Materials (Basel). 2017; 10 (12):1354 [7] Rumsys D, Spundulis E, Bacinskas D, Kaklauskas G. Compressive strength . and durability properties of structural. lightweight concrete with fine expanded ...

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Designing the Composition of Cement-Stabilized

Materials (Basel, Switzerland), 12 Mar 2021, 14(6) DOI: 10.3390/ma14061390 PMID: 33809360 . Share ... To assess the possibility of achieving a certain compressive strength of CSRE, based on its core properties, the innovative algorithm of designing CSRE is proposed. Based on 582 crash-test of CSRE samples of different composition and compaction levels, along with the use of association ...

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Stability and strength of covalent crystals under

13.12.2012  Values of the compressive strength under superimposed transverse stresses are of particular interest since the triaxiality of a stress state in a DAC plays an important role in stability of the lattice. In addition, simple tests of elastic stability will be performed for the three crystals under uniaxial loading (both tensile and compressive) in all the three crystallographic directions.

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Compressive properties of additively manufactured ...

It has higher compressive strength and e ective moduli than other competitive structures, tetrahedral and pyramidal [4,5]. A Kagome structure exhibited more resistance to plastic buckling under the compression and shear than other lattices structures. A wire woven Kagome structure showed higher compressive strength and better energy absorption

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Compressive strength of mortars incorporating

20.11.2020  Compressive strength of mortars incorporating fly ash The results of f c 7 days and f c 28 days for the reference mortar mix (CL) were 21.4 and 43.0 N/mm 2 respectively. The results of f c 7 days and f c 28 days for mortar mixes incorporating fly ash as cement substitute by percentages of 30%, 40%, 60%, 80, and 100% with different (R) ratios are shown in Fig. 7 , Fig. 8 respectively.

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Residual Compressive Strength of Short

Corrosion is considered as one of the main factors in the structural performance deterioration of steel members. In this study, experimental and numerical methods were used to assess the reduction in compressive strength of short tubular steel columns with local corrosion damage. The corrosion damage was varied with different depths (0, 1.5, 2, 3, 4, 4.5, and 6 mm), height (0, 20, 40, 60, 80 ...

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Characterization and compressive property of

20.08.2018  Magnesium matrix composites reinforced with Al 2 O 3 ceramic sphere (i.e., AZ91D-Al 2 O 3 sphere composites) were prepared by infiltration casting method. The morphology, microstr

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Stress (mechanics) - Wikipedia

Stress that exceeds certain strength limits of the material will result in permanent deformation (such as plastic flow, fracture, ... This number will be positive if P is "pulling" on Q (tensile stress), and negative if P is "pushing" against Q (compressive stress) The shear component is then the vector T − (T n)n. Units. The dimension of stress is that of pressure, and therefore its ...

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Correlation between mineralization and

Zumstein V, Kraljević M, Wirz D, Hügli R, Müller-Gerbl M. Correlation between mineralization and mechanical strength of the subchondral bone plate of the humeral head. J Shoulder Elbow Surg. July 2012;21(7):887-893. Publication Date July 2012 How Analyze was Used “The data sets were axially cut to a thickness of 0.6 mm and transferred into an...

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