Relevant bibliographies by topics / Concrete Surface Roughening

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters

Academic literature on the topic 'Concrete Surface Roughening'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Concrete Surface Roughening"

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Daukšys, Mindaugas, Rokas Kudirka, and Svajūnas Juočiūnas. "Research on the Concrete Mixture Stability and Sliding on the Inclined Plane." Journal of Sustainable Architecture and Civil Engineering 26, no. 1 (April 10, 2020): 87–97. http://dx.doi.org/10.5755/j01.sace.26.1.21714.

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The stability of conventional concrete mixture was investigated using an inclined plane method. The experiment consisted of two steps: first, the research was made to determine the influence of coarse aggregate content in aggregates mixture on the stability and sliding of concrete mixture, when the specimens of mixture are on the inclined plane without additional roughening of surface; second, the research was made to determine the influence of inclined plane surface roughening on the stability and sliding of concrete mixture. During the research the condition was checked: the concrete mixture on the sloping plane will be stable, if the yield stress τ0 is higher than the shear stress τ in. (τ 0 ≥ τ). The shear stresses and rheological property yield stresses of conventional concrete mixtures were calculated analytically by using an empirical formula. Test results showed that the increase of coarse aggregate (4/16 fraction gravel) content from about 417 to 1175 kg in concrete mixture is enough to achieve the stability of concrete mixture, when plane inclination angles are 25°, 35° and 45°, but not enough to stop sliding process. In this case, additional implements are needed to increase the adhesion of fresh concrete to the base. By using the inclined planes, which were coated with a special dimpled membrane and geotextile, the fresh concrete does not slide downwards by inclined plane.
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Li, Xiao Xia, and Zhi Gang Yang. "Site-Test Research on Shearing Capacity of Bonding Interface between New and Old Concrete." Applied Mechanics and Materials 351-352 (August 2013): 1523–26. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.1523.

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Base on a practical project, the site-test Research on s Capacity of Bonding Interface Between New and Old Concrete was carried out with three different disposal ways, which is Roughening ,slotting and planting bar. The test process and phenomenon were described, The conclusion is that Planting bar is a more effective way to improve the bearing capacity between the new and old concrete surface.
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Mohammed Ridha Mahmmod Wajde, Laith, S. S. Alyhya Zainab, M. R. Abdul Rasoul, Abdulrasool T. Abdulrasool, and . "Utilization Iron Filings and Microwave Heating in Roughening the Surface of Smoothed Coarse Aggregates." International Journal of Engineering & Technology 7, no. 4.20 (November 28, 2018): 395. http://dx.doi.org/10.14419/ijet.v7i4.20.26145.

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Properties of coarse aggregate such as texture have a significant influence on the performance of fresh and hardened concrete. A smooth surface can enhance workability, yet a rougher one offers a stronger bond between aggregate and paste, resulting in higher strength. This research aims to roughen the texture of white smoothed aggregate by using cement-iron filings mortar with the aid of microwave maturation to accelerate the adhesion process of mortar-aggregate surface. The mortar was prepared by mixing an equal weight of cement and iron filings, of a particular size, with sand. Four different periods (2, 4, 6 and 8 mints.) of microwave treatment in addition to water curing were considered plus one reference mortar which cured in only air for 24 hrs. The treated aggregate was then used for casting concrete specimens with a w/c ratio of 0.5 in which their properties being determined by means of density, compressive and tensile strengths observations. The main findings revealed that the concrete specimens contained microwave treated aggregate attained higher compressive strength compared with those treated in the air. Data also showed that concrete specimens with microwave treated aggregate possess better tensile properties as a consequence of the improvement in the transition zone.
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Huang, Xian Bin, Jia Chen, Zhan Yuan Zhu, Wen Hai En, and Jian Liang. "Research of the Key Reinforcement Technology Based on Miaoziping Bridge of Du Wen Expressway after the Wenchuan Earthquake." Advanced Materials Research 243-249 (May 2011): 1377–82. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.1377.

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The height from the bridge deck of 5th main pier to ground surface is about115m, and the depth from the top surface of pier cap to water surface is 65m. Reinforcement measures such as flaw detection by frogman, hole plugged, steel caisson placing, steel caisson modeling, high performance concrete seal cracks perimeter. Reinforcement show that, the effect of high-pressure water jet roughening and hole plugged is well; the steel caisson which weighs about 400t sinking stablely and reaching the intended design location; great liquidity, high performance concrete has good workability , 28d strength is above the design and specification demands, bridge static and dynamic tests meeting the design requirements. The research is important for bridge strengthening, and provides reference for the reinforcement design and construction of the same type bridge.
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Valikhani, Alireza, Azadeh Jaberi Jahromi, Islam M. Mantawy, and Atorod Azizinamini. "Numerical Modelling of Concrete-to-UHPC Bond Strength." Materials 13, no. 6 (March 18, 2020): 1379. http://dx.doi.org/10.3390/ma13061379.

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Ultra-High Performance Concrete (UHPC) has been a material of interest for retrofitting reinforced concrete elements because of its pioneer mechanical and material properties. Numerous experimental studies for retrofitting concrete structures have shown an improvement in durability performance and structural behaviour. However, conservative and sometimes erroneous estimates for bond strength are used for numerically calculating the strength of the composite members. In addition, different roughening methods have been used to improve the bond mechanism; however, there is a lack of numerical simulation for the force transfer mechanism between the concrete substrate and UHPC as a repair material. This paper presents an experimental and numerical programme designed to characterize the interfacial properties of concrete substrate and its effect on the bond strength between the two materials. The experimental programme evaluates the bond strength between the concrete substrates and UHPC with two different surface preparations while using bi-surface test and additional material tests, including cylinder and cube tests for compression property, direct tension test, and flexural test to complement UHPC tensile properties. Non-linear finite element analysis was conducted, which uses a numerical zero thickness volume model to define the interface bond instead of a traditional fixed contact model. The numerical results from the zero thickness volume model show good agreement with the experimental results with a reduction in error by 181% and 24% for smooth and rough interface surfaces if compared to the results from the model with a fixed contact.
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Chmielewska, Bogumiła, Grzegorz Adamczewski, Ru Wang, Zheng Hong Yang, and P. Wang. "Application of Wedge Splitting Test for Evaluation of the Bond Strength in Repair System Alumina Cement Concrete vs. PCC Mortar." Advanced Materials Research 1129 (November 2015): 401–8. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.401.

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There are several key factors, which are considered, when selecting methods and systems for concrete repair. Good bonding between repair material and concrete substrate is a crucial and simultaneously complex phenomenon. This paper shortly presents methods used for the bond strength evaluation with different ways of loading of bonded joints. A systems consisting of high performance concrete substrate and two types of repair materials are investigated. The main goal of the work is to compare a polymer-cement modified mortar (PCC) and a rapidly setting repair concrete (based on alumina cement). Technical characteristic of the materials as well as their bond strength to concrete substrate are presented. Surface of concrete substrate is prepared by using different roughening techniques commonly applicable on site. Bond strength is measured by standard pull-of test and by the wedge splitting test (WST). WST test adaptation for that purpose allows to extend the description of adhesion using fracture mechanics parameters such a work of adhesion and fracture energy
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Gołdyn, Michał, and Tadeusz Urban. "Experimental Investigations on Interface between Ordinary and Lightweight Aggregate Concretes Cast at Different Times." Materials 14, no. 7 (March 28, 2021): 1664. http://dx.doi.org/10.3390/ma14071664.

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Experimental investigations on 12 push-off specimens with dimensions of 600 × 300 × 180 mm (200 × 180 mm shear plane) were presented. Models reflected the connection between ordinary concrete (NWC) substrate and lightweight aggregate concrete (LWAC) overlay. The main purpose of the study was to investigate behaviour of the interface between concretes cast at different times. Two different interface conditions were considered: Smooth and rough (obtained by graining). In the selected elements, additional reinforcement consisting of one ∅8 bar was injected. The elements were tested under load control. The failure of the specimens without interface reinforcement was violent and resulted from breaking of the adhesive bond. Specimens with shear reinforcement failed in a ductile manner, however, due to the low reinforcement area, the residual load capacity was much lower than the load recorded just before cracking. It was found that mechanical roughening of the surface can lead to degradation of the concrete structure. As a result, the load-carrying capacities of elements with smooth interface proved to be higher than the ultimate loads of elements with deliberately roughened contacts. Comparative analysis showed that the existing design procedures ACI 318-19, Eurocode 2, Model Code 2010, and AASHTO can lead to safe but conservative estimation of the actual resistance of the concrete interface.
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Soleimani, Sayed Mohamad, and Nemkumar Banthia. "Shear Strengthening of RC Beams Using Sprayed Glass Fiber Reinforced Polymer." Advances in Civil Engineering 2012 (2012): 1–20. http://dx.doi.org/10.1155/2012/635176.

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The effectiveness of externally bonded sprayed glass fiber reinforced polymer (Sprayed GFRP) in shear strengthening of RC beams under quasi-static loading is investigated. Different techniques were utilized to enhance the bond between concrete and Sprayed GFRP, involving the use of through bolts and nuts paired with concrete surface preparation through sandblasting and through the use of a pneumatic chisel prior to Sprayed GFRP application. It was found that roughening the concrete surface using a pneumatic chisel and using through bolts and nuts were the most effective techniques. Also, Sprayed GFRP applied on 3 sides (U-shaped) was found to be more effective than 2-sided Sprayed GFRP in shear strengthening. Sprayed GFRP increased the shear load-carrying capacity and energy absorption capacities of RC beams. It was found that the load-carrying capacity of strengthened RC beams was related to an effective strain of applied Sprayed GFRP. This strain was related to Sprayed GFRP configuration and the technique used to enhance the concrete-FRP bond. Finally, an equation was proposed to calculate the contribution of Sprayed GFRP in the shear strength of an RC beam.
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Hlůžek, Radim, and Jan Trejbal. "USE OF FINELY GROUND RECYCLED CONCRETE FOR IMPROVEMENT OF INTERFACIAL ADHESION IN FIBER-REINFORCED CEMENTITIOUS COMPOSITES." Acta Polytechnica CTU Proceedings 21 (March 21, 2019): 5–9. http://dx.doi.org/10.14311/app.2019.21.0005.

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This paper deals with an improvement and an assessment of a polymeric macro-fibers adhesion to the cement matrix. For this purpose, two approaches were employed – (i) roughening of fibers using a plasma treatment and (ii) an addition of finely ground recycled concrete (amount 30 wt. %) to the matrix ensuring the roughness of interfacial zones. Polyethylene terephthalate (PET) and polypropylene (PP) fibers, both ca. 0.3mm in a diameter, were used. These were surface roughened using a cold oxygen plasma treatment and then observed by means of the scanning electron microscopy. Consequently, pull-out tests of an individual fiber embedded 25mm in the matrix were performed, while the force needed for fiber pullout was recorded. Results have shown that plasma treated fibers reached on a better adhesion with the matrix by up to ca. 5% (PET) and 20% (PP), if compared to reference fibers. When recycled concrete was used, the adhesion increased further by about 5–10% for both fiber types.
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Trejbal, Jan, Zdeněk Prošek, Josef Fládr, and Pavel Tesárek. "Utilization of Surface-Modified Polymer and Glass Micro-Fibers as Reinforcement in Cement Composites." Key Engineering Materials 760 (January 2018): 225–30. http://dx.doi.org/10.4028/www.scientific.net/kem.760.225.

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The presented work focuses on plasma modifications of polymer and glass micro-fibers (having 32 and 14 μm in the diameter, respectively) used as randomly distributed and oriented reinforcement of concrete composites. Fiber surfaces were modified by means of the low-pressure coupled cold oxygen plasma in order to attain a strong adhesion with the cement matrix. From the perspective of micro scale, an impact of modifications on both the physical and the chemical surface changes of treated fibers was examined using: (i) a wettability measurements – an evaluation of an interphase interaction between demineralized water and fibers and (ii) the SEM microscopy – an assessment of a surface morphology. From the perspective of macro scale, the interaction between the two materials was examined by destructive four-point bending tests of the cement paste containing both the reference and treated fibers (specimens having dimensions equal to 40×40×160 mm, water to cement ration 0.4) were done. It was shown that the wettability of modified fibers was increased by approx. 10 % and 70 % in the case of glass and polymer fibers, respectively. The SEM morphology analysis revealed fine roughening of treated fibers, if compared to the reference ones. The mechanical testing pointed out on a toughness increase in the post-cracking response of loaded specimens.
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Dissertations / Theses on the topic "Concrete Surface Roughening"

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Gilbertson, Rebecka Lynn. "Recommendations for Surface Treatment for Virginia Inverted T-Beam Bridge System." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83600.

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This thesis investigates the impact of interface surface treatment methods for use in the Virginia Inverted T-Beam bridge system. The specific system consists of precast beams with thin bottom flanges placed next to one another, with a cast-in-place slab on top. Previous research has shown that the strength of this system after cyclic loading is highly dependent upon the shear strength of the interface between the precast and cast-in-place sections, especially for the adhesion-based connection configuration. The approval of this bridge system for use in bridges with high daily traffic volumes hinges on the verification of its strength and durability for a 50-year lifespan. The shear strength of ten different surface textures was tested using push-off tests to determine which interface roughening methods would prove adequate for use in the bridge system. The strength was found to depend on both the amplitude and the geometry of the undulations on the beam-to-slab interface. Using this information, a texture was selected for a new trial of the adhesion-based connection configuration, and a test specimen was constructed. After completing cyclic loading to simulate the design life of the bridge, it was found that the system achieved a strength similar to previous monotonically loaded specimens. It was concluded that the bridge is safe for use in high daily traffic areas provided that a surface roughening with adequate shear strength is used.
Master of Science
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Book chapters on the topic "Concrete Surface Roughening"

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Takase, Yuya, Takahide Abe, Takaaki Ikeda, Toshinaga Wada, Keiichi Katori, and Yasuji Shinohara. "Discussion on mechanical behavior of joints using post-installed anchors and concrete surface roughening for seismic retrofitting." In Computational Modelling of Concrete Structures, 837–46. CRC Press, 2014. http://dx.doi.org/10.1201/b16645-95.

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