scholarly journals Study on influencing factors of mechanical properties of ceramsite foam concrete based on orthogonal test

2020 ◽  
Vol 768 ◽  
pp. 032039
Author(s):  
Feiyu Tao ◽  
Pengyuan Gu ◽  
Ying Yang
Keyword(s):  
Mechanical Properties ◽  
Influencing Factors ◽  
Orthogonal Test ◽  
Foam Concrete

Research on Chemical Modification of Wood of Fast-Growing Poplar

2013 ◽  
Vol 749 ◽  
pp. 461-465
Author(s):  
De Jun Shen ◽  
Chang Hai Yu ◽  
Zhen Xing
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Structural Material ◽  
Chemical Modification ◽  
Orthogonal Test ◽  
Low Molecular Weight ◽  
Wood Structure ◽  
Optimum Conditions ◽  
Fast Growing ◽  
Performance Requirements

This topic is considered to modify the fast-growing Poplar to improve the properties, in order to fully meet the performance requirements for the structural material. This study aims to improve the dimensional stability and some other mechanical properties through impregnated with the low-molecular-weight PF resin. Through design orthogonal test in different mole ratio of Formaldehyde and Phenol, different amount of NaOH and PVA, we make PF resin to impregnate Poplar and pressing into laminated timber to measure bonding strength, MOR, MOE. The study indicated that: the optimum conditions of the low molecular weight PF resin for modify Poplar are: mole ratio of Formaldehyde and Phenol is 2.4, mole ratio of NaOH and phenol is 0.05, amount of PVA is 3% of the phenol. Under this condition Poplar specimen got the biggest increase in various properties and it can satisfy the requirements of the outdoor wood structure.

Orthogonal Investigation of Influencing Factors on the Modification of Montmorillonite by THPC in Acid Conditions

2014 ◽  
Vol 936 ◽  
pp. 1017-1021
Author(s):  
Pan Chen ◽  
Jin Cheng Wang
Keyword(s):  
Reaction Time ◽  
Ion Exchange ◽  
Influencing Factors ◽  
Reaction Temperature ◽  
Orthogonal Test ◽  
Test Results ◽  
Phosphonium Salts ◽  
Exchange Reactions ◽  
Quaternary Phosphonium Salts

Na-MMT was modified with quaternary phosphonium salts, tetramethylolphosphonium chloride (THPC), via ion-exchange reactions, in acid conditions. Different factors such as reaction time , reaction temperature, the types of solvent, and CEC ratios, were investigated using orthogonal test. Results showed that the best combination of these four factors were A1B3C1D1, that is, the type of the solvent was acetone and water (1:1), reaction time was 3h, CEC ratio was 1:1, and the reaction temperature was 80°C.

scholarly journals Monte Carlo Simulation for Exploring Mechanical Properties of Porous Materials Based on Scaled Boundary Finite Element Method

2022 ◽  
Vol 12 (2) ◽  
pp. 575
Author(s):  
Guangying Liu ◽  
Ran Guo ◽  
Kuiyu Zhao ◽  
Runjie Wang
Keyword(s):  
Mechanical Properties ◽  
Finite Element Method ◽  
Monte Carlo Simulation ◽  
Finite Element ◽  
Monte Carlo ◽  
Porous Materials ◽  
Influencing Factors ◽  
Random Models ◽  
Scaled Boundary Finite Element ◽  
Element Method

The existence of pores is a very common feature of nature and of human life, but the existence of pores will alter the mechanical properties of the material. Therefore, it is very important to study the impact of different influencing factors on the mechanical properties of porous materials and to use the law of change in mechanical properties of porous materials for our daily lives. The SBFEM (scaled boundary finite element method) method is used in this paper to calculate a large number of random models of porous materials derived from Matlab code. Multiple influencing factors can be present in these random models. Based on the Monte Carlo simulation, after a large number of model calculations were carried out, the results of the calculations were analyzed statistically in order to determine the variation law of the mechanical properties of porous materials. Moreover, this paper gives fitting formulas for the mechanical properties of different materials. This is very useful for researchers estimating the mechanical properties of porous materials in advance.

scholarly journals THE INFLUENCE OF SUPERPLASTICISERS ON THE FRESH AND MECHANICAL BEHAVIOUR OF FOAM CONCRETE UTILIZING POFA AS SAND REPLACEMENT

2020 ◽  
Vol 83 (1) ◽  
pp. 57-65
Author(s):  
Abdullah Abdulsalam Al-Shwaiter ◽  
Hanizam Awang
Keyword(s):  
Mechanical Properties ◽  
Compression Strength ◽  
Foam Stability ◽  
Foam Concrete ◽  
Palm Oil Fuel Ash ◽  
Fuel Ash ◽  
Different Types ◽  
Oil Fuel ◽  
Polycarboxylate Ether ◽  
Tension Strength

Since the foam concrete is delicate, it is important to carefully choose the additives, such as superplasticiser (SP), to be used in this type of concrete. The effect of using different types and percentages of SP on the performance of foam concrete with target density of 1500±50 kg/m3 has been investigated in this study. A sustainable material, Palm Oil fuel ash (POFA), used as a sand replacement at a level of 20% by weight. Five types of SP have been used in this study, including Sulphonated polymer-based, selected synthetic and organic polymers-based and three Polycarboxylate ether-based (PCE). Different SP contents (0.0%, 1.0% and 2.0%) have been used as a ratio of cement weight. Workability, consistency, foam stability and mechanical properties were investigated. The results showed that types and quantity of SP have a significant effect on the different properties of the foam concrete. Workability, compression strength and tension strength improved remarkably for most specimens. The use of 2% SP4, a PCE SP, showed superior workability, compression strength and tensile strength with acceptable stability.

Gum Tragacanth Fibers from Astragalus gummifer Species: Effects of Influencing Factors on Mechanical Properties of Fibers

2007 ◽  
Vol 7 (19) ◽  
pp. 2861-2865 ◽  
Author(s):  
Ramin Khajavi ◽  
Seyed Hossein Mossav Pourgharbi ◽  
Amir Kiumarsi ◽  
Abosayeed Rashidi
Keyword(s):  
Mechanical Properties ◽  
Influencing Factors ◽  
Gum Tragacanth ◽  
Species Effects

scholarly journals Effects of PET Fibers on Pumpability, Shootability, and Mechanical Properties of Wet-Mix Shotcrete

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Xiangfei Cui ◽  
Guoming Liu ◽  
Cheng-long Wang ◽  
Yudong Qi
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Pressure Drop ◽  
Linear Relationship ◽  
Polyethylene Terephthalate ◽  
Orthogonal Test ◽  
Waste Plastic ◽  
Pet Fibers ◽  
Change Trend ◽  
Negative Linear Relationship

Polyethylene terephthalate (PET) fiber from waste plastic bottles is an environmentally friendly fiber that can improve the mechanical properties of wet-mix shotcrete. The main objective of this paper is to investigate the effects of PET fiber parameters on pumpability, shootability, and mechanical properties of wet-mix shotcrete. For this purpose, the orthogonal test based on three factors and three levels was conducted. The width, length, and content of PET fiber were selected as the experimental variables. The tests of wet-mix shotcrete reinforced by PET fibers were carried out, along with properties tests such as slump, pressure drop, build-up thickness, compressive strength, and splitting strength. The results showed the change trend of shotcrete performances with increasing PET fiber parameters (width, length, and content). According to the orthogonal test, PET fiber parameters were determined (1 mm width, 20 mm length, and 5 kg/m3 content). Furthermore, relationships between slump and pumpability and shootability were explored, as well as the relationships between pumpability, shootability, and mechanical properties. It was found that pressure drop and compressive strength had the strongest negative linear relationship among all fitting relationships. We hoped that this study could contribute the useful information for the application of wet-mix shotcrete mixed with PET fibers.

Study on Spinning and Structure Properties of Regenerated TussahSilk/Cellulose Blend Fibers Using Ionic Liquids

2011 ◽  
Vol 236-238 ◽  
pp. 1156-1159 ◽  
Author(s):  
Guo Zengge ◽  
Bo Wen Cheng ◽  
Song Jun ◽  
Gao Lei ◽  
Lu Fei ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquids ◽  
Orthogonal Test ◽  
Blend Fiber ◽  
Structure Properties

In this work, the spinnging process of tussah silk/cellulose blend fiber using ionic liquids as solvent has been studied and the optimum spinning parameters were obtained from the orthogonal test. The structures morphology and properties of blend fibers were investigated through mechanical properties, SEM and FTIR. The result showed that break strength was 1.4124cN/dtex and break elongation was 9.803% in the condition of the optimum spinning parameters.

The Aluminum Brazing Pieces of Mechanical Performance Based on GRNN Neural Network

2013 ◽  
Vol 455 ◽  
pp. 154-158
Author(s):  
Xing Hua Liang ◽  
Lin Shi ◽  
Yu Si Liu ◽  
Xiao Ming Hua
Keyword(s):  
Neural Network ◽  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Mechanical Performance ◽  
Orthogonal Experiment ◽  
Approximation Error ◽  
Orthogonal Test ◽  
Generalized Regression Neural Network ◽  
Absolute Value ◽  
Material Preparation

Aluminum and aluminum alloy were widely used in various industrial fields,the key to application is the reliable welding. In this thesis,LF21 aluminum alloy brazing materials were designed and prepared by Orthogonal experiment,and mechanical properties of the brazing specimen was tested. Based on the GRNN(Generalized Regression Neural Network),Nonlinear relationship modle of brazing material preparation parameters and mechanical properties of the weldment was established.The results show that the model has better stability.When smooth factor value is 0.1,the network approximation error and prediction error absolute value is 0.01%.It can be realized that an nonliner mapping between the aluminum alloy brazing preparation parameters and solder joint tensil strenth based on the Orthogonal test and can do better prediction of the weld mechanical properties,according to brazing material preparation parameters.

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