scholarly journals Comparative analysis of the compression strength characteristics of polymer concrete modified by ultra-fine by-products silicon and aluminum industries

2020 ◽  
Vol 880 ◽  
pp. 012001
Author(s):  
V B Balabanov ◽  
K N Putsenko
Keyword(s):  
Comparative Analysis ◽  
Compression Strength ◽  
Strength Characteristics ◽  
Polymer Concrete ◽  
By Products

scholarly journals Use the Polymer Concrete as a Substitute for Ordinary Concrete by Improving of Acoustic and Thermal Insulation With Suitable Cost

2017 ◽  
Vol 1 (2) ◽  
pp. 650-661
Author(s):  
Amer M. Ibrahim ◽  
Ali Adwan Hmood ◽  
Noor Al Huda H. Ahmed
Keyword(s):  
Thermal Conductivity ◽  
Compression Strength ◽  
Chemical Interaction ◽  
Economic Feasibility ◽  
Polymer Concrete ◽  
Light Weight ◽  
Novolac Resin ◽  
Ordinary Concrete ◽  
Acoustic Insulation ◽  
Light Weight Aggregate

The purpose of this study is to examine the effect of adding novolac resin by different volumetric percentages to concert as a light weight aggregate In addition to the economic feasibility of the use of these concrete in the field of build and construction .they investigated tht the compression strength, thermal conductivity, acoustic insulation and densities. The results showed ultimate compression strength and acoustic insulation by melting novolac and added to the cement and sand as a polymer concrete in the hot state (by melting novoac >90c).However added novolac resin as aggregate in the cold state to the concrete increase thermal conductivity and increasing compression strength and acoustic insulation .This results gained by chemical interaction of novolac and cement.  

scholarly journals Long-Term Compressive Strength of Polymer Concrete-like Composites with Various Fillers

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1207 ◽  
Author(s):  
Joanna Julia Sokołowska
Keyword(s):  
Compressive Strength ◽  
Vinyl Ester ◽  
Fossil Fuels ◽  
Polymer Concrete ◽  
Quartz Powder ◽  
Density Measurements ◽  
Volumetric Density ◽  
By Products ◽  
Over Time

The durability of building composites with polymer matrix, such as polymer concretes, is considered high or excellent. However, very few studies are available that show the properties of such composites tested long after the specimens’ preparation, especially composites with fillers other than traditional rock aggregates. The paper presents the long-term compressive strength of polymer concrete containing common and alternative fine fillers, including quartz powder (ground sand) and by-products of the combustion of Polish fossil fuels (coal and lignite), tested nine or 9.5 years after preparation. The results were compiled with the data for respective specimens tested after 14 days, as well as 1.5 and 7 years. Data analysis confirmed the excellent durability of concrete-like composites with various fillers in terms of compressive strength. Density measurements of selected composites showed that the increase in strength was accompanied by an increase in volumetric density. This showed that the opinion that the development of the strength of composites with polymer matrices taking place within a few to several days was not always justified. In the case of a group of tested concrete-like composites with vinyl-ester matrices saturated with fly ashes of various origins, there was a further significant increase in strength over time.

THE LEAD CONTENT IN ORGANS OF MALE RATS UNDER CHRONIC INTAKE FROM DIET IN LOW DOSES

2018 ◽  
Vol 1 (4) ◽  
pp. 78-84
Author(s):  
E. B. Mirzoev ◽  
◽  
V. O. Kobyalko ◽  
O. A. Gubina ◽  
N. А. Frolova ◽  
...  
Keyword(s):  
Body Weight ◽  
Comparative Analysis ◽  
Russian Federation ◽  
Human Body ◽  
Lead Concentration ◽  
Meat Products ◽  
Male Rats ◽  
Low Doses ◽  
By Products ◽  
Group 1

The content of lead in the liver, kidneys and spleen of male rats of the Wistar line was studied in chronic metal intake at doses of 0,0019; 0,0023 and 0,0039 mg/ kg of body weight. Clinically healthy animals (120 heads, age of 3-4 months) were divided into 4 (four) groups of 30 heads each. Group 1 of animals received basic diet and served as control. Rats of 2, 3 and 4 groups (experiment) received 5 g of meat with different concentrations of lead daily for 180 days of study with the main diet. The content of lead in meat did not exceed the permissible level (0,5 mg/kg) and was 0,13; 0,16 and 0,27 mg/kg, respectively. Samples of organs and tissues were taken of 5 (five) animals from each group for the 30, 60, 90, 120, 150 and 180 day of intoxication. Chronic intake of lead with a diet in male rats at doses of 0,0019; 0,0023 and 0,0039 mg/kg of body weight led to increasing of the concentration of metal in the liver, kidneys and spleen. The maximum values of the index were observed in animals of 4 groups, which received lead at a dose of 0,0039 mg/kg of body weight. The comparative analysis of lead concentration in organs revealed the maximum levels of metal in the kidneys, which exceeded the standards in the by-products of slaughter animals established both in Russia and in Europe. The received results allow to speak about necessity of revision of the permissible content of lead in meat and meat products of slaughter animals specified in Russian Federation (0,5 mg/ kg) and daily admission to the human body (0,0036 mg/kg of body weight) recommended by WHO.

Forming Process and Mechanical Properties of Fiber Reinforced Polymer Concrete for Elementary Machine Parts

2013 ◽  
Vol 432 ◽  
pp. 98-103
Author(s):  
Wen Feng Bai ◽  
Peng Yin ◽  
Shou Cheng Yan
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Glass Fiber ◽  
Compression Strength ◽  
Fiber Reinforced Polymer ◽  
Polymer Concrete ◽  
Fiber Reinforced ◽  
Forming Process ◽  
Reinforced Polymer ◽  
Better Than

For the good vibration alleviating properties, polymer concrete (PC) has attracted much attention in the field of elementary machine components. In order to get more excellent mechanical properties, the forming process and mechanical properties of PC were concerned. In this research, glass fiber and carbon fiber were applied to improve the mechanical properties of PC. A series of PC and fiber reinforced polymer conctete (FRPC) specimens were prepared basing on the orthogonal tables for property test. Compression strength test was carried out. It is obvious that FRPC is better than PC as far as compression strength is concerned, and carbon fiber reinforced polymer concrete (CFRPC) is better than glass fiber reinforced polymer concrete (GFRPC). Trend curves about the relationship between fiber length and compression strength, as well as that between fiber dosage and compression strength were drawn. Relationship between the considered factors and compression strength is analyzed basing on the experiment results and the trend curves. Strengthening fibers would bear most of the internal stress when the specimen is faced to outer loads. Thus, FRPC has much better properties than PC. Mechanical properties of CFRPC are relatively better than that of GFRPC, for the strength of carbon fiber is better than that of glass fiber. It could be concluded that glass fiber is the proper strengthening fiber for PC considering both technical and economical factors.

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