Comparative Study on the Elastic Modulus of Polymer Concrete

2015 ◽  
Vol 1129 ◽  
pp. 145-150
Author(s):  
Kyu Seok Yeon ◽  
Kwan Kyu Kim ◽  
Chul Young Kim ◽  
Jae Heum Yeon
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Goodness Of Fit ◽  
Unsaturated Polyester ◽  
Acrylic Resin ◽  
Prediction Equation ◽  
Polymer Concrete ◽  
Wide Range ◽  
Structural Applications ◽  
Using Data

Polymer concrete is used for a wide range of precast structural applications and repair works for existing infrastructures. For these applications, one of the key mechanical propertiesthatneed to be consideredis the elastic modulus. In this study, the relationship between elastic modulus and compressive strength of polymer concrete made with three different types of resin (i.e., unsaturated polyester resin, acrylic resin, and epoxy resin) is comprehensively investigated using data sets available from previous studies in order to develop a prediction equation for elastic modulus that can be generally applied to polymer concrete. Results showed that the equation developed under this study can be reasonably adopted for the predictions of polymer concrete's elastic modulus as a function of compressive strength because the prediction equation has a high goodness of fit asrepresented by a R2 value of 0.77

Effect of Cyclic Exposure of Chemicals on Compressive Strength of Polyester Resin Based Polymer Concrete

2013 ◽  
Vol 687 ◽  
pp. 185-190 ◽  
Author(s):  
Masoud Jamshidi ◽  
Mohammad Javad Ghasemi ◽  
Abdolreza Hashemi
Keyword(s):  
Compressive Strength ◽  
Construction Industry ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Concrete Structures ◽  
Polymer Concrete ◽  
Acid Solutions ◽  
Gas Oil ◽  
Demineralized Water ◽  
Concrete Production

Polymer concretes (PC) were introduced to building and construction industry more than 50 years ago. Gradually, they became a suitable substitute for concrete structures. Their superior properties againt aggresives introduced them as a good overlay for concrete structures; however, their application was shortly diminished due to the higher costs. In this research a homemade cost-quality effective resin (unsaturated polyester) is used as binder in the polymer concrete production. Polymer concrete specimens were evaluated for compressive strength and its fluctuation due to cyclic exposure to different aggresive solutions (sulfuric acid, nitric acid, citric acid, chloridric acid, sodum sulfate, water, demineralized water, sodium hydroxid, potasium hydroxid and gas oil). It was found that PC specimens degraded more in alkali conditioned in comparison to acid solutions.

Effects of Elevated Temperatures on the Compression Strength of Nanoclay Filled Unsaturated Polyester Resin

2014 ◽  
Vol 554 ◽  
pp. 208-212 ◽  
Author(s):  
M.S. Fartini ◽  
M.S. Abdul Majid ◽  
Mohd Afendi ◽  
N.A.M. Amin ◽  
Azizul Mohamad
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Unsaturated Polyester ◽  
Polyester Resins ◽  
Weight Percentage ◽  
Compression Properties ◽  
Strain Behaviour ◽  
Compressive Tests

The paper describes the effects of the montmorillonite (MMT) fillers commonly known as nanoclay, on the compression properties of unsaturated polyester resins at different weight percentage of nanoclay. Modified resin specimens with 1, 3 and 5 wt. % of nanoclay contents were prepared and subjected to compressive tests according to ASTM D695. The static uniaxial compression testing were conducted at various temperatures ranging from room temperature (RT) to the temperature closer to its glass transition temperature Tg to study the effect of nanoclay fillers on the compressive stress-strain behaviour at high temperatures (room temperature, 35, 45, and 75°C). The mechanical properties of the nanomodified resin including the elastic modulus, maximum stress and failure strain were determined. The experimental results imply that adding these nanoclay fillers has enhanced the elastic modulus, compressive strength, and toughness without sacrificing the strain to failure and thermal stability of the unsaturated polyester. However it was found that generally, all specimens showed degradation in compressive strength with increases in temperatures.

The spatial configuration of urban crime environments and statistical modeling

2015 ◽  
Vol 44 (4) ◽  
pp. 647-667 ◽  
Author(s):  
Enrico di Bella ◽  
Matteo Corsi ◽  
Lucia Leporatti ◽  
Luca Persico
Keyword(s):  
Goodness Of Fit ◽  
Spatial Configuration ◽  
Property Crime ◽  
Urban Crime ◽  
Large Area ◽  
Spatial Error ◽  
Wide Range ◽  
Crime Types ◽  
Crime Modeling ◽  
Using Data

The aim of this paper is to discuss the representation of space in statistical models of urban crime. We argue that some important information represented by the properties of space is either lost or hardly interpretable if those properties are not explicitly introduced in the model as regressors. We illustrate the issue commenting on the shortcomings of the two standard approaches to modeling the dispersion of crime in a city: using local attributes of places as regressors, and defining a catch-all spatial component to neutralize the effect of latent spatial factors from the model. As an alternative to the current methods, the metrics of spatial configuration, including those devised by the technique called Space Syntax Analysis, provide useful variables that can be introduced as regressors. Such regressors offer interpretable information on space, behavior, and their interactions, that would otherwise be lost. We therefore consider a set of three configurational variables that represent different forms of centrality and that are thought to have influence on a wide range of human activities. We propose an innovative procedure to adapt these variables to most urban graphs and then, using data from a large area in the city of Genoa (Italy), we show that the three variables are well defined, consistent, noncollinear indicators, with evident spatial meanings. Then we build two sets of Hierarchical Bayesian count models of different urban crime types (“property crime” and “arson and criminal damage”) around some known covariates of crime and we show that the overall quality of the models is improved (with the size of improvement depending on the type of crime) when the three configurational variables are included. Furthermore, we show that what the three variables explain of the overall variability of crime is a sizeable part of what would be the spatial error term of a traditional spatial model of urban crime. While the configurational variables alone cannot provide a goodness of fit as high as the one obtained with a generic spatial term, they have a relevant role for the interpretation of the results, which is ultimately the objective of urban crime modeling.

scholarly journals Effects of HDPE Plastic Waste Aggregate on the Properties of Concrete

2021 ◽  
Vol 9 (10) ◽  
pp. 519-524
Author(s):  
Shakir Hussain
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Cost Effective ◽  
Strength Properties ◽  
Cement Matrix ◽  
Polymer Concrete ◽  
Hardened Concrete ◽  
Polymer Waste ◽  
Wide Range ◽  
Polymer Wastes

Abstract: Polymer waste volumes have surged in recent years as a result of growing industrialization and fast improvements in living standards. In Malaysia, the majority of polymer waste is discarded rather than recycled. This circumstance results in major issues such as waste of natural resources and pollution of the environment. Polymer products, such as synthetic fibres, plastics, and rubber, are petrochemical compounds that disintegrate slowly in nature. Even after a long amount of time, plastic materials are not easily biodegradable. In reality, a wide range of waste materials can be used as a cement matrix inert. For the manufacture of the polymer concrete, trash bag plastics were employed as polymer wastes HDPE in this study (PC). The purpose of this research is to investigate the characteristics and characterisation of polymer HDPE as a coarse aggregate replacement in concrete. Temperatures of 160°C, 170°C, 180°C, 190°C, and 200°C were used in the heating procedure. By volumetric approach, five compositions of coarse aggregate with varied crushed stone: HDPE waste ratios of 0:100, 15:85, 30:70, 45:55, and 60:40 were utilised. The use of polymerwaste as coarse aggregate in traditional concrete was examined. With fresh and hardened concrete tests, the effects of polymer wastes on the workability and strength of the concrete were investigated. After 28 days, the compressive strength of the PCwas determined to be suitable for nonstructural use. The findings of the cost research revealed that the PC is more cost effective than traditional concrete. Keywords: Polymer Wastes HDPE; Coarse Aggregate; Compressive Strength; Properties

Effect of marble particle size and gamma irradiation on mechanical properties of polymer concrete

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Gonzalo Martínez-Barrera ◽  
Witold Brostow
Keyword(s):  
Particle Size ◽  
Elastic Modulus ◽  
Unsaturated Polyester ◽  
Compression Modulus ◽  
Dynamic Elastic Modulus ◽  
Polymer Concrete ◽  
Medium Size ◽  
Particle Sizes ◽  
Compressive Properties ◽  
Dispersed Particles

AbstractEffects of gamma radiation and the marble particle size on compressive properties and the dynamic elastic modulus of polymer concretes (PCs) were studied. The PCs had a composition of 30 % of unsaturated polyester resin and 70 wt. % of marble as aggregate. Different types of PC were developed with the combination of one, two or three marble-particle sizes. The materials were submitted to 5, 10, 50, 100 and 150 kGy of radiation doses. Both the compressive properties and the dynamic elastic modulus values depend on the combination of the marble-particle sizes and the applied radiation dose. Higher numbers of dispersed particles per unit volume provide more resistance to crack propagation. On the other hand, longer particles give more reinforcement. As a result of these two competing effects, medium size marble particles provide the highest compression modulus

scholarly journals Effect of Silica fume on Ordinary Portland Cement and Polymer Concrete Made out of M Sand

2019 ◽  
Vol 9 (2S2) ◽  
pp. 42-46
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Silica Fume ◽  
Unsaturated Polyester ◽  
High Strength ◽  
Pozzolanic Reaction ◽  
Maximum Strength ◽  
Polymer Concrete ◽  
Split Tensile Strength ◽  
Conventional Concrete

In this investigation, conventional concrete was made with replacing the sand by 80 % of M-sand and the cement by fillet material silica fume in varying percentages say 5%, 10 % , and 15%, to study the compressive strength, split tensile strength and flexural strength. In order to the maximum strength was attained at 10% of silica fume. The result showed that by increasing the silica fume content, the strength of the M-sand concrete was decreased because higher fineness of silica fume content decreases the strength of the M-sand concrete. Secondly polymer concrete with unsaturated polyester resin with hardener MEKP, Cobalt as the accelerator and silica fume in varying percentages say 0%, 5% and 10% was made to study the compressive strength and split tensile strength of polymer concrete. In improved silica fume content the strength was high. Polymer concrete improved the mechanical properties. Polymer concrete system was mainly useful to fill the micro voids. In this research, the maximum strength was attained at 5% of silica fume filler added with polymer concrete. Thus the high strength of the concrete was obtained due to the pozzolanic reaction with the silica fume.

Concrete + polyester + CaCO3: Mechanics and morphology after gamma irradiation

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Gonzalo Martínez-Barrera ◽  
Manuel Eduardo Espinosa-Pesqueira ◽  
Witold Brostow
Keyword(s):  
Compressive Strength ◽  
Calcium Carbonate ◽  
Polyester Resin ◽  
Mechanical Performance ◽  
Unsaturated Polyester ◽  
Compressive Strain ◽  
Compressive Modulus ◽  
Polymer Concrete ◽  
Concrete Materials ◽  
Periodical Change

AbstractWe have studied effects of gamma radiation on mechanical performance of polymer concrete (PC) containing varying concentrations of an unsaturated polyester resin and calcium carbonate. The compressive strength values increase from the zero dose (non-irradiated PC) to 10 kGy; afterwards we find a periodical change as a function of the resin concentration. The highest compressive strength corresponds to the highest resin concentration but the changes are not too large. Compressive strain values also go symbiotically with the resin concentration. All our composites - including irradiated and non-irradiated - have higher strength values than those reported for earlier polyester + concrete materials. The compressive modulus values follow the same pattern as the compressive strength and strain.

scholarly journals Experimental investigation of cracking behaviors of ductile and brittle rock-like materials

2021 ◽  
Vol 15 (56) ◽  
pp. 16-45
Author(s):  
Hao Bai ◽  
Wei Du ◽  
Yundong Shou ◽  
Lichuan Chen ◽  
Filippo Berto
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Axial Stress ◽  
Geotechnical Engineering ◽  
Cementitious Materials ◽  
Epoxide Resin ◽  
Application Range ◽  
Wide Range ◽  
Similar Materials ◽  
Cracking Characteristics

The cracking characteristics of ductile rocks were studied by similar materials with sand, barite, epoxide resin, polyamide, silicone rubber and alcohol, while the cracking characteristics of brittle rocks were investigated by similar material with sand, barite, rosin and alcohol. In this paper, to enhance the application range of the rock-like materials in the field of geotechnical engineering model tests, the values of the elastic modulus and the compressive strength of the artificial rock-like materials are changed in a wide range by adjusting the amount of cementitious materials (epoxide resin, polyamide, rosin, etc). The elastic modulus, compressive strength and cracking characteristics were obtained from the complete axial stress–strain curves of the specimens made of similar materials, which were cast using the different mixture ratios. These experimental data can provide quantitative investigation on mixture ratios of similar materials of rocks to model the geotechnical engineering. Furthermore, the effect of mixture ratios on mechanical properties and crack propagation pattern of specimens were also investigated by the specimens with pre-existing flaws under uniaxial compressive tests

Compression Testing and Microstructure of Heat-Treatable Aluminum Periodic Cellular Metal

2006 ◽  
Vol 929 ◽  
Author(s):  
B. A. Bouwhuis ◽  
G. D. Hibbard
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Energy Density ◽  
Sheet Metal ◽  
Mechanical Performance ◽  
Weight Ratio ◽  
Resistance Mechanisms ◽  
Confined Compression ◽  
Wide Range ◽  
Out Of Plane

ABSTRACTPeriodic cellular metals (PCMs) can offer higher specific strengths and stiffnesses than conventional (i.e. stochastic) metallic foams. This study examines the effects of PCM microstructure and loading conditions on the mechanical performance.PCM cores with 95% open porosity were constructed from perforated 6061 aluminium alloy sheets using a perforation-stretching method. This method places planar, periodically-perforated sheet metal in an alternating-pin jig. The pins apply force out-of-plane, plastically deforming the sheet metal into a truss-like array of struts (i.e. metal supports) and nodal peaks (i.e. strut intersections). Micro-hardness profiles were taken in the PCM struts to investigate microstructural evolution during fabrication and after heat treatment.Truss cores were tested in two limiting uniaxial compression conditions. In the first, the PCM cores are placed between smooth compression platens where the nodes are laterally free and compressive forces are resisted through PCM node-bending (i.e. free compression). In the second, the PCM cores were placed between plates where the nodes are laterally confined and compressive forces are resisted through PCM beam-buckling (i.e. confined compression). Compression response was analyzed in terms of peak compressive strength, elastic modulus, and energy density absorbed upon densification; response values were used to illustrate the effect of compression test conditions. In addition, PCM cores were tested in the age-hardened state and annealed state to determine microstructural effects on compressive response.Analysis of PCM response in free- and confined-compression conditions indicates a greater force resistance in beam-buckling over node-bending resistance mechanisms. The compressive strength, elastic modulus, and energy density of heat-treatable AA6061 PCMs are be found to respond: 1) over a wide range of value, dependent on the microstructure; 2) over a wide range of value, dependent on the PCM compression conditions; and 3) equally, if not more repeatable and with higher compressive strength-to-weight ratio than conventional metal foams.

ZYMAXX

Alloy Digest ◽  
1991 ◽  
Vol 40 (10) ◽  
Keyword(s):  
Fracture Toughness ◽  
Compressive Strength ◽  
Corrosion Resistance ◽  
Creep Resistance ◽  
Chemical Processing ◽  
Industrial Equipment ◽  
Automotive Applications ◽  
Adverse Conditions ◽  
Chemical Inertness ◽  
Wide Range

Abstract ZYMAXX provides outstanding compressive creep resistance, toughness and chemical inertness at high temperatures and pressures and under adverse conditions. They have a wide range of uses beyond chemical processing, including aerospace and automotive applications, general industrial equipment, home appliances, farm and construction equipment. This datasheet provides information on physical properties, hardness, tensile properties, and compressive strength as well as fracture toughness and creep. It also includes information on corrosion resistance. Filing Code: Cp-18. Producer or source: E. I. Dupont de Nemours & Company Inc..

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