Investigation on concrete compressive strength mixed with sand contaminated by crude oil products

2013 ◽  
Vol 47 ◽  
pp. 99-103 ◽  
Author(s):  
M. Attom ◽  
R. Hawileh ◽  
M. Naser
Keyword(s):  
Compressive Strength ◽  
Crude Oil ◽  
Oil Products ◽  
Concrete Compressive Strength

scholarly journals Liquid Penetration Depth and Strength of Concretes Modified with Polymer Admixtures Under the Action of Crude-Oil Products

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3900 ◽  
Author(s):  
Maciej Gruszczyński ◽  
Małgorzata Lenart
Keyword(s):  
Compressive Strength ◽  
Crude Oil ◽  
Present Article ◽  
Oil Products ◽  
Liquid Penetration ◽  
Polymer Dispersion ◽  
Standard Mixture ◽  
Mineralized Water ◽  
Polymer Dispersions ◽  
Styrene Butadiene

In the present article, the research results of concretes modified with a polymer dispersion of vinyl-benzene and acrylic (PC1) and with a styrene–butadiene dispersion (PC2) are discussed. Concretes were exposed to diesel, non-ethylated fuel, and the standard mixture of light liquids for 1000 h. Concretes modified with polymer dispersions, especially with the styrene–butadiene dispersion (PC2), indicated a smaller degree of liquid penetration into the depth of samples compared to the control concrete. The compressive strength for tested concretes, determined after 1000 h of storage in crude-oil products, in comparison to the strength of samples stored in de-mineralized water was significantly decreased, with the maximum differences equal to 12% for PC2 concrete.

scholarly journals THE INFLUENCE OF CRUDE OIL PRODUCTS ON RC STRUCTURE DESTRUCTION / NEAPDIRBTOS NAFTOS PRODUKTŲ ĮTAKA GELŽBETONIO STRUKTŪROS SUARDYMUI

2011 ◽  
Vol 17 (1) ◽  
pp. 146-156 ◽  
Author(s):  
Tomasz Z. Błaszczynski
Keyword(s):  
Compressive Strength ◽  
Crude Oil ◽  
Progressive Failure ◽  
Active Surface ◽  
Oil Products ◽  
Mineral Oils ◽  
Rc Structure ◽  
Physico Chemical ◽  
Concrete Damage ◽  
Compressive Strength Of Concrete

It is known that RC industrial structures are liable to the effects of crude oil products, which may have a disadvantageous influence on their exploitation and safety. Within this research, the influence of crude oil products on the physico-mechanical properties of mature concrete, as well as other possible mechanisms of RC progressive failure have been analysed. Crude oil products with a very low neutralisation number were found to be physico-chemical active agents affecting concrete. Experimental analysis undertaken in order to assess the compressive strength of concrete and its bond to reinforcements is described. Long term investigations were conducted in order to determine the effects of a group of crude oil products—mineral oils—on the properties of concrete and reinforced concrete samples. Detailed results of this research are included in the paper. Comparing the influence of different mineral oils on the compressive strength of concrete, leads to the conclusion that there are large differences in their effects. The paper also attempts to answer the question of how the characteristics of RC structure bonds change over time of exposure to mineral oils. The problem of the influence of organic agents on concrete and its bond under conditions of natural humidity is mainly linked to its structure. In the case of oil products, there are four possible mechanisms i.e., biological, chemical, physical and physico-chemical, affecting concrete, its bond and, sometimes, reinforcements. Each of these mechanisms is presented. Necessary laboratory tests were performed in order to prove the thesis that the content of active surface polar molecules in active agents is the reason behind concrete damage brought about by crude oil products. The conducted experiments demonstrated that the effects of artificial environments (on concrete) prepared by the author, are the same as those of widely used industrial mineral oils. Santrauka Yra žinoma, kad gelžbetoninės pramoninės konstrukcijos yra jautrios neapdirbtos naftos produktams, o tai gali turėti neigiamąįtaką jų eksploatacijai ir saugumui. Šiame tyrime analizuojama neapdirbtos naftos produktų įtaka brandaus betono fizinėms ir mechaninėms savybėms, aptariami galimi poveikiai, skatinantys progresyvų gelžbetonio irimą. Buvo nustatyta, kad neapdirbtos naftos produktai, turintys labai žemą neutralizavimo laipsnį, yra fiziniai ir cheminiai reagentai, veikiantys betoną. Straipsnyje aptariamas eksperimentas, kuris buvo atliktas siekiant įvertinti betono stiprį gniuždant ir jo sukibtį su armatūra. Buvo atlikti ilgai trunkantys bandymai, siekiant nustatyti neapdirbtos naftos produktų grupės—mineralinių naftos produktų—poveikį betono savybėms ir armatūros bandiniams. Šiame straipsnyje pateikiami išsamūs tyrimų rezultatai. Skirtingų mineralinių naftos produktų poveikio betono stipriui palyginimas leidžia daryti išvadą, kad poveikiai gali būti labai skirtingi. Straipsnyje stengiamasi atsakyti į klausimą—kaip keičiasi gelžbetonio sukibtis laikui bėgant, jo neapsaugojus nuo mineralinių naftos produktų poveikio. Natūralios drėgmėssąlygomis organinių reagentų įtaka betonui ir jo sukibčiai daugiausia priklauso nuo jo struktūros. Veikiant naftos produktams galimi keturi pagrindiniai poveikiai—biologinis, cheminis, fizinis, fizinis ir cheminis, kurie veikia betoną, jo sukibimą ir kartais armatūrą. Kiekvienas šių poveikių yra aptariamas straipsnyje. Siekiant įrodyti teiginį, kad aktyvios paviršiaus polinės molekulės, esančios aktyviuose reagentuose, yra priežastis, dėl kurios betonas veikiamas neapdirbtos naftos produktų, buvo atlikti būtini laboratoriniai bandymai. Atlikti eksperimentai parodė, kad dirbtinės aplinkos poveikiai (betonui), sumodeliuoti autoriaus, yra tokie patys kaip ir tie, kurie atsiranda dėl plačiai naudojamų pramoninių naftos produktų.

Variasi Penambahan Sika Cim Dan Fiber Kawat Pada Beton Mutu Fc’ 30 Mpa

2018 ◽  
Vol 9 (2) ◽  
pp. 67-73
Author(s):  
M Zainul Arifin
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Curing Temperature ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Normal Concrete ◽  
Astm Method ◽  
Additive Type ◽  
Composition Variation ◽  
Compressive Strength Of Concrete

This research was conducted to determine the value of the highest compressive strength from the ratio of normal concrete to normal concrete plus additive types of Sika Cim with a composition variation of 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1 , 50% and 1.75% of the weight of cement besides that in this study also aims to find the highest tensile strength from the ratio of normal concrete to normal concrete in the mixture of sika cim composition at the highest compressive strength above and after that added fiber wire with a size diameter of 1 mm in length 100 mm with a ratio of 1% of material weight. The concrete mix plan was calculated using the ASTM method, the matrial composition of the normal concrete mixture as follows, 314 kg / m3 cement, 789 kg / m3 sand, 1125 kg / m3 gravel and 189 liters / m3 of water at 10 cm slump, then normal concrete added variations of the composition of sika cim 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1.5%, 1.75% by weight of cement and fiber, the tests carried out were compressive strength of concrete and tensile strength of concrete, normal maintenance is soaked in fresh water for 28 days at 30oC. From the test results it was found that the normal concrete compressive strength at the age of 28 days was fc1 30 Mpa, the variation in the addition of the sika cim additive type mineral was achieved in composition 0.75% of the cement weight of fc1 40.2 Mpa 30C. Besides that the tensile strength test results were 28 days old with the addition of 1% fiber wire mineral to the weight of the material at a curing temperature of 30oC of 7.5%.

PENGKAJIAN KEKUATAN BETON STRUKTUR JEMBATAN PASCA KEBAKARAN

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Sudarmadi Sudarmadi
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Strength Assessment ◽  
Concrete Testing

In this paper a case study about concrete strength assessment of bridge structure experiencing fire is discussed. Assessment methods include activities of visual inspection, concrete testing by Hammer Test, Ultrasonic Pulse Velocity Test, and Core Test. Then, test results are compared with the requirement of RSNI T-12-2004. Test results show that surface concrete at the location of fire deteriorates so that its quality is decreased into the category of Very Poor with ultrasonic pulse velocity ranges between 1,14 – 1,74 km/s. From test results also it can be known that concrete compressive strength of inner part of bridge pier ranges about 267 – 274 kg/cm2 and concrete compressive strength of beam and plate experiencing fire directly is about 173 kg/cm2 and 159 kg/cm2. It can be concluded that surface concrete strength at the location of fire does not meet the requirement of RSNI T-12-2004. So, repair on surface concrete of pier, beam, and plate at the location of fire is required.

scholarly journals Study on Influence of Range of Data in Concrete Compressive Strength with Respect to the Accuracy of Machine Learning with Linear Regression

2021 ◽  
Vol 11 (9) ◽  
pp. 3866
Author(s):  
Jun-Ryeol Park ◽  
Hye-Jin Lee ◽  
Keun-Hyeok Yang ◽  
Jung-Keun Kook ◽  
Sanghee Kim
Keyword(s):  
Machine Learning ◽  
Compressive Strength ◽  
Linear Regression ◽  
Coarse Aggregate ◽  
Learning Algorithm ◽  
Linear Regression Analysis ◽  
Aggregate Size ◽  
Training Dataset ◽  
Machine Learning Algorithm ◽  
Concrete Compressive Strength

This study aims to predict the compressive strength of concrete using a machine-learning algorithm with linear regression analysis and to evaluate its accuracy. The open-source software library TensorFlow was used to develop the machine-learning algorithm. In the machine-earning algorithm, a total of seven variables were set: water, cement, fly ash, blast furnace slag, sand, coarse aggregate, and coarse aggregate size. A total of 4297 concrete mixtures with measured compressive strengths were employed to train and testing the machine-learning algorithm. Of these, 70% were used for training, and 30% were utilized for verification. For verification, the research was conducted by classifying the mixtures into three cases: the case where the machine-learning algorithm was trained using all the data (Case-1), the case where the machine-learning algorithm was trained while maintaining the same number of training dataset for each strength range (Case-2), and the case where the machine-learning algorithm was trained after making the subcase of each strength range (Case-3). The results indicated that the error percentages of Case-1 and Case-2 did not differ significantly. The error percentage of Case-3 was far smaller than those of Case-1 and Case-2. Therefore, it was concluded that the range of training dataset of the concrete compressive strength is as important as the amount of training dataset for accurately predicting the concrete compressive strength using the machine-learning algorithm.

scholarly journals Linkages between Energy Delivery and Economic Growth from the Point of View of Sustainable Development and Seaports

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4255
Author(s):  
Elżbieta Szaruga ◽  
Zuzanna Kłos-Adamkiewicz ◽  
Agnieszka Gozdek ◽  
Elżbieta Załoga
Keyword(s):  
Sustainable Development ◽  
Crude Oil ◽  
Cross Correlation ◽  
Point Of View ◽  
Oil Products ◽  
Modern Approach ◽  
Economic Cycles ◽  
Study Results ◽  
The One ◽  
Oil And Oil Products

This paper presents the synchronisation of economic cycles of GDP and crude oil and oil products cargo volumes in major Polish seaports. On the one hand, this issue fits into the concept of sustainable development including decoupling; on the other hand, the synchronisation may be an early warning tool. Crude oil and oil products cargo volumes are a specific barometer that predicts the next economic cycle, especially as they are primary sources of energy production. The research study applies a number of TRAMO/SEATS methods, the Hodrick–Prescott filter, spectral analysis, correlation and cross-correlation function. Noteworthy is the modern approach of using synchronisation of economic cycles as a tool, which was described in the paper. According to the study results, the cyclical components of the cargo traffic and GDP were affected by the leakage of other short-term cycles. However, based on the cross-correlation, it was proved that changes in crude oil and oil products cargo volumes preceded changes in GDP by 1–3 quarters, which may be valuable information for decision-makers and economic development planners.

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