scholarly journals Deformability in Unsaturated Polyester Resin-Based Concrete: Effects of the Concentration of Shrinkage-Reducing Agent and Type of Filler

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 727 ◽  
Author(s):  
Jung Heum Yeon ◽  
Hee Jun Lee ◽  
Jaeheum Yeon
Keyword(s):  
Thermal Expansion ◽  
Modulus Of Elasticity ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Compressive Strain ◽  
Spherical Particles ◽  
Polymer Concrete ◽  
Mix Proportion ◽  
Uniform Dispersion ◽  
Shrinkage Reducing Agent

In this study, the effects of shrinkage reduction agent (SRA) content and filler type on the deformability characteristics of unsaturated polyester (UP) resin-based polymer concrete were experimentally investigated. Specifically, the setting shrinkage, thermal expansion, maximum compressive strain and the modulus of elasticity of UP polymer concrete were all analyzed. Setting shrinkage was found to be influenced by the UP resin, the SRA and filler. The thermal expansion, maximum compressive strain and modulus of elasticity were also affected by the aggregate. The effect of SRA content on deformability was found to be greater than that of the filler type. To put UP polymer concrete to efficient use, it is essential to secure proper deformability according to the intended purpose. At that time, it is desirable that the deformation characteristics resulting from the SRA content and filler type sufficiently reflect when the mix proportion is determined. The effects of filler type on the deformability of UP polymer concrete are such that: A uniform dispersion of filler particles impacts the setting shrinkage; the thermal expansion is influenced by the filler’s various thermal expansion properties; the compressive strain is related to the nature of the small spherical particles that tend to fill porosity, producing better packing of the aggregate materials; and the modulus of elasticity is influenced by the density, which is related to the strength of the filler. However, additional in-depth studies are required on all of these elements.

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 Waste Materials from Tetra Pak Packages as Reinforcement of Polymer Concrete

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Miguel Martínez-López ◽  
Gonzalo Martínez-Barrera ◽  
Carlos Barrera-Díaz ◽  
Fernando Ureña-Núñez ◽  
Witold Brostow
Keyword(s):  
Flexural Strength ◽  
Gamma Rays ◽  
Modulus Of Elasticity ◽  
Particle Concentration ◽  
Polyester Resin ◽  
Raw Materials ◽  
Unsaturated Polyester ◽  
Silica Sand ◽  
Polymer Concrete ◽  
Tetra Pak

Different concentrations (from 1 to 6 wt%) and sizes (0.85, 1.40, and 2.36 mm) of waste Tetra Pak particles replaced partially silica sand in polymer concrete. As is well known, Tetra Pak packages are made up of three raw materials: cellulose (75%), low density polyethylene (20%), and aluminum (5%). The polymer concrete specimens were elaborated with unsaturated polyester resin (20%) and silica sand (80%) and irradiated by using gamma rays at 100 and 200 kGy. The obtained results have shown that compressive and flexural strength and modulus of elasticity decrease gradually, when either Tetra Pak particle concentration or particle size is increased, as regularly occurs in composite materials. Nevertheless, improvements of 14% on both compressive strength and flexural strength as well as 5% for modulus of elasticity were obtained when polymer concrete is irradiated.

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.

scholarly journals Polypropylene Fibers as Reinforcements of Polyester-Based Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Gonzalo Martínez-Barrera ◽  
Enrique Vigueras Santiago ◽  
Susana Hernández López ◽  
Osman Gencel ◽  
Fernando Ureña-Nuñez
Keyword(s):  
Particle Size ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Polypropylene Fiber ◽  
Polymer Concrete ◽  
Polypropylene Fibers ◽  
Compressive Properties ◽  
Fiber Concentration ◽  
Medium Particle ◽  
Medium Particle Size

Effects of gamma radiation and the polypropylene fibers on compressive properties of polymer concrete composites (PC) were studied. The PCs had a composition of 30 wt% of unsaturated polyester resin and 70 wt% of marble particles which have three different sizes (small, medium, and large). The PCs were submitted to 200, 250, and 300 kGy of radiation doses. The results show that the compressive properties depend on the combination of the polypropylene fiber concentration and the applied radiation dose. The compressive strength value is highest when using medium particle size, 0.1 vol% of polypropylene fibers and 250 kGy of dose; moreover, the compressive modulus decreases when increasing the particle size.

Strength of Porous Polymer Concrete and Growth Properties of Plant within Planting Polymer Block Using Unsaturated Polyester Resin

2013 ◽  
Vol 687 ◽  
pp. 235-240 ◽  
Author(s):  
Chan Yong Sung ◽  
Young Ik Kim
Keyword(s):  
Perennial Ryegrass ◽  
Tall Fescue ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Porous Polymer ◽  
Polymer Concrete ◽  
Herbaceous Plant ◽  
Coverage Ratio ◽  
Polymer Block

This research was performed to provide strength property of porous polymer concrete using unsaturated polyester resin depending on the amount of binder and planting properties on coverage ratio and growth of plants in planting polymer block through planting of cool-season grass and herbaceous plant in porous polymer block. The compressive strength of porous polymer concrete depending on the binder contents and aggregate sizes were in the range of 17.1 to 23.2MPa. In the planting polymer block with Tall fescue, Perennial ryegrass and Alfalfa, the coverage ratio (in 12 weeks after seeing) were more than 7 point regardless of the kinds of plants, respectively. The roots length of plants in planting polymer block completely passed through not only the block with height of 5 cm but also the block with height of 10 cm in 20 weeks after seeding. Planting polymer block with Tall fescue, Perennial ryegrass and Alfalfa indicates that it will be advantageous to environment-friendly greening works such as greening of slopes and revetments

scholarly journals Mechanical and Physical Properties of Polyester Polymer Concrete Using Recycled Aggregates from Concrete Sleepers

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Francisco Carrión ◽  
Laura Montalbán ◽  
Julia I. Real ◽  
Teresa Real
Keyword(s):  
Particle Size ◽  
Flexural Strength ◽  
Physical Properties ◽  
Polyester Resin ◽  
Mechanical Performance ◽  
Unsaturated Polyester ◽  
Recycled Aggregates ◽  
Polymer Concrete ◽  
Recycling Process ◽  
Mechanical And Physical Properties

Currently, reuse of solid waste from disused infrastructures is an important environmental issue to study. In this research, polymer concrete was developed by mixing orthophthalic unsaturated polyester resin, artificial microfillers (calcium carbonate), and waste aggregates (basalt and limestone) coming from the recycling process of concrete sleepers. The variation of the mechanical and physical properties of the polymer concrete (compressive strength, flexural strength, modulus of elasticity, density, and water absorption) was analyzed based on the modification of different variables: nature of the recycled aggregates, resin contents (11 wt%, 12 wt%, and 13 wt%), and particle-size distributions of microfillers used. The results show the influence of these variables on mechanical performance of polymer concrete. Compressive and flexural strength of recycled polymer concrete were improved by increasing amount of polyester resin and by optimizing the particle-size distribution of the microfillers. Besides, the results show the feasibility of developing a polymer concrete with excellent mechanical behavior.

scholarly journals Thermal, Morphological Analysis of Epoxy/Unsaturated Polyester Blended Nanocomposite with Wollastonite Powder as a Particulate

2019 ◽  
Vol 31 (9) ◽  
pp. 2069-2072
Author(s):  
A. Damodara Reddy ◽  
M.L.S. Deva Kumar
Keyword(s):  
Morphological Analysis ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Morphological Structure ◽  
Decomposition Temperature ◽  
Scanning Calorimetry ◽  
Research Article ◽  
Uniform Dispersion ◽  
Wide Range ◽  
Microscopy Images

In the proposed research article, polymer nanocomposites on the basis of thermoset polymer resultant blends (epoxy/polyester) having wollastonite powder are prepared by high shear mixer (mechanical), followed by an ultra-sonicator for uniform dispersion of wollastonite particulates in the final blend matrix. Wide range percentages of modified wollastonite nano-particulates with 0, 1, 2, 3, 4 and 5 wt. % were incorporated into the epoxy/polyester blend matrix in order to evaluate the effect of nanofillers on nanophase morphological structure and to study material properties. Various thermal parameters of the nanocomposite were evaluated using thermogravimetric analysis and differential scanning calorimetry techniques. Further, the scanning electron microscopy images have been employed to know fractured surfaces of the titled compound. From the experimental data it was found that uniform miscibility of epoxy/polyester blend mix and homogenous dispersion of wollastonite nano particulates in the blend matrix was noticed. From the TGA studies, 8 % weight loss and 4 °C rise in decomposition temperature was observed with addition of 5 wt. % wollastonite when compared with the 0 wt. % wollastonite combination of epoxy/unsaturated polyester resin blend. DSC results further revealed that the modified wollastonite nanoparticles is major responsible for the glass transition temperature (Tg) of the nanocomposites.

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