scholarly journals Theoretical Study on Prestress Loss in Cross-Tensioned Concrete Pavement with BFRP Tendons

2020 ◽  
Vol 10 (21) ◽  
pp. 7737
Author(s):  
Yating Zhang ◽  
Zhiyi Huang
Keyword(s):  
Basalt Fiber ◽  
Plain Concrete ◽  
Theoretical Method ◽  
Concrete Pavement ◽  
Slab Thickness ◽  
Prestress Loss ◽  
Slab Width ◽  
Reinforced Polymer ◽  
The Difference ◽  
The Impact

Cross-tensioned concrete pavement can reduce transverse joints and cracks and improve the durability of the pavement, and the decrease in slab thickness can be achieved without damaging the performance of the pavement. However, the corrosion of the steel can cause serious damage to the pavement structure, resulting in higher maintenance costs and shorter service life. Basalt fiber-reinforced polymer (BFRP) has been proven to be an effective alternative in both jointed plain concrete pavement (JPCP) and continuously reinforced concrete pavement (CRCP) due to its lightweight and corrosion-resistant properties. In this paper, a systematic theoretical method for determining the prestress loss of BFRP tendons in cross-tensioned concrete pavement was proposed, with the impact of the slab width and distribution angle of the prestressed tendon on the prestress loss being studied and compared to the results of traditional steel strands. Results showed that the proportion of the prestress loss due to anchorage deformation and prestress retraction in the prestressing stage rose with the increase in distribution angle and the decrease in slab width, while the prestress loss during the in-service stage was a constant value for both BFRP tendons and steel strands. The prestress loss of BFRP tendons was far lower than that of steel strands in both prestressing stage and in-service stage for a given slab width (3 m, 4.5 m, 9.0 m, 12.75 m) and distribution angle (20°, 25°, 30°, 35°, 40°, 45°), and the difference ranged from 6.4% to 16%, signifying the feasibility of BFRP tendons in cross-tensioned concrete pavement. Overall, the smaller the slab width, the greater the difference of the prestress loss between BFRP tendons and steel strands.

Improving the impact resistance of concrete panels by glass fiber reinforced polymer sheets

2017 ◽  
Vol 8 (2) ◽  
pp. 304-320 ◽  
Author(s):  
Mohamed MA Abdel-Kader ◽  
Ahmed Fouda
Keyword(s):  
Glass Fiber ◽  
Plain Concrete ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Concrete Panels ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Polymer Sheets ◽  
The Impact

In this article, the response of 12 plain concrete specimens to an impact of hard projectiles was examined in an experimental study. The tests were planned with an aim to observe the influence of using glass fiber reinforced polymer sheets to strengthen plain concrete panels on the performance of concrete under this type of loading. The main findings show that strengthening plain concrete panels with glass fiber reinforced polymer sheets showed satisfactory performance under the impact load; the glass fiber reinforced polymer sheets can be used for strengthening or upgrading concrete structures to improve their resistance against impact. Also, the location of the glass fiber reinforced polymer sheet affects the front and rear face craters.

scholarly journals Flexural Behavior of Basalt Fiber Reinforced Polymer Tube Confined Coconut Fiber Reinforced Concrete

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Yang Lv ◽  
Xueqian Wu ◽  
Mengran Gao ◽  
Jiaxin Chen ◽  
Yuhao Zhu ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Basalt Fiber ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced Polymer ◽  
Control Group ◽  
Fiber Reinforced ◽  
Coconut Fiber ◽  
Reinforced Polymer ◽  
Basalt Fiber Reinforced Polymer

Basalt fiber has arisen new perspectives due to the potential low cost and excellent mechanical performance, together with the use of environmental friendly coir can be beneficial to the development of sustainable construction. In this study, a new composite structure called basalt fiber reinforced polymer (BFRP) tube encased coconut fiber reinforced concrete (CFRC) is developed. The 28-day compression strength of the plain concrete is about 15 MPa, which represents the low-strength poor-quality concrete widely existing in many old buildings and developing countries. Three types of BFRP tubes, i.e., 2-layer, 4-layer, and 6-layer, with the inner diameter of 100 mm and a length of 520 mm, were prepared. The plain concrete (PC) and CFRC were poured and cured in these tubes to fabricated BFRP tube confined long cylindrical beams. Three PC cylindrical beams and 3 CFRC cylindrical beams were prepared to be the control group. The four-point bending tests of these specimens were carried out to investigate the enhancement due to the BFRP tube and coir reinforcement. The load-carrying capacity, force-displacement relationship, failure mode, and the cracking moment were analyzed. Results show that both BFRP tube confined plain concrete (PC) and BFRP tube confined CFRC have excellent flexural strength and ductility, and the inclusion of the coir can further enhance the ductility of the concrete.

Probabilistic Analysis of Highway Pavement Life for Illinois

2003 ◽  
Vol 1823 (1) ◽  
pp. 111-120 ◽  
Author(s):  
Nasir G. Gharaibeh ◽  
Michael I. Darter
Keyword(s):  
Reinforced Concrete ◽  
Probabilistic Analysis ◽  
Asphalt Concrete ◽  
Geographic Location ◽  
Concrete Pavement ◽  
Pavement Management ◽  
Slab Thickness ◽  
Probability Of Survival ◽  
Load Carrying ◽  
The Impact

The Illinois Department of Transportation has periodically conducted pavement longevity studies to assess the longevities and the traffic loadcarrying capacities of these new and rehabilitated pavements so that any needed improvements to design, construction, or rehabilitation could be identified and implemented in a timely manner. The results of the latest round of pavement longevity studies in Illinois provide performance data updated through 2000 for new hot-mix asphalt concrete (HMAC), jointed reinforced concrete pavement (JRCP), and continuously reinforced concrete pavement (CRCP) construction as well as the asphalt concrete (AC) overlays (first, second, and third overlays) of these original pavements. These studies were conducted on more than 2,000 centerline miles of Interstate and other freeways that were constructed beginning in the 1950s in Illinois. Significant findings on the performance of the original pavements and overlays were obtained, and these findings will be of value to designers and managers to improve pavement cost-effectiveness and life. Survival curves have an economic impact on the agency. Key findings show the impact of pavement type (HMAC, JRCP, or CRCP), slab thickness, geographic location (north or south), durability cracking (D-cracking), and AC overlay thickness (coupled with preoverlay condition) on longevity and load-carrying capacity. The results of the probabilistic analysis illustrate the wide variation in pavement life and traffic carried. The study also provides models for predicting the probability of survival for various designs of original pavements and AC overlays in Illinois for use in pavement management.

scholarly journals Basalt-Fiber-Reinforced Polyvinyl Acetate Resin: A Coating for Ductile Plywood Panels

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 49 ◽  
Author(s):  
Samuel Kramár ◽  
Miroslav Trcala ◽  
Korawit Chitbanyong ◽  
Pavel Král ◽  
Buapan Puangsin
Keyword(s):  
Polyvinyl Acetate ◽  
Basalt Fiber ◽  
Fiber Reinforced Polymer ◽  
Core Material ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Bending Load ◽  
Fiber Fractions ◽  
Parallel Direction ◽  
The Impact

The aim of this study was to create a reinforced composite wood-based panel that would be leaned towards the environment Plywood was used as a core material and fiber-reinforced polymer was used as a reinforcement. Conventional resin for the fiber-reinforced polymer was substituted with polyvinyl acetate (PVAC), which has several advantages, such as a lower price, easier handling, and better degradability. The second chosen component, basalt fiber, is cost attractive and environmentally friendly. The combination of one and two layers of fabric with three fiber fractions and 4 mm thick plywood was investigated. The best results were achieved with two layers of fabric and the highest fiber fraction. The improvements of the ultimate bending load and bending stiffness of the plywood in the perpendicular direction were 305% and 325%, respectively. The ultimate load and stiffness of the parallel direction were improved by 31% and 35%, respectively. However, specimens always failed in the compressional zone. The highest reinforcing effect was found with the impact test: The energy required to fracture specimens increased by 4213% and 6150% for one and two layers of fabric, respectively. In conclusion, specimens exhibited high ductility due to the PVAC and basalt fiber. The amount of work and energy required to cause fractures was extensive.

scholarly journals Finite element simulation and multi-factor stress prediction model for cement concrete pavement considering void under slab

2021 ◽  
Author(s):  
Liu Bangyi ◽  
Huang Xiaoming
Keyword(s):  
Finite Element ◽  
Tensile Stress ◽  
Concrete Slab ◽  
Three Dimensional ◽  
Maximum Tensile Stress ◽  
Concrete Pavement ◽  
Slab Thickness ◽  
Void Size ◽  
Tensile Stresses ◽  
The Impact

Uneven support as result of voids beneath concrete slabs can lead to high tensile stresses at the corner of the slab and eventually cause many forms of damage, such as cracking or faulting. Three-dimensional (3D) finite element models of the concrete pavement with void are presented. The accuracy of the model is verified by two methods. The analysis shows that the impact of void size and void depth at the slab corner on the slab stress are similar, which result in the change of the position of the maximum tensile stress. The maximum tensile stresses do not increase with the increase of the void size for relatively small void size. The maximum tensile stress increases rapidly with the enlargement in the void size when the size≥0.4m. The increments of maximum tensile stress can reach 183.7% when the void size are 1.0m. The increase of slab thickness can effectively reduce maximum tensile stress. A function is established to calculate the maximum tensile stress of the concrete slab. The function takes into account the void size and the slab thickness. The reliability of the function was verified by comparing the error between the calculated and simulated results.

scholarly journals Analyses on Prestress Loss and Flexural Performance of the Laminated Bamboo Beam Applied with Prestressed BFRP Sheet

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Qingfang Lv ◽  
Ye Liu ◽  
Yi Ding
Keyword(s):  
Basalt Fiber ◽  
Fiber Reinforced Polymer ◽  
Specimen Preparation ◽  
Fiber Reinforced ◽  
Prestress Loss ◽  
Loading Test ◽  
Flexural Performance ◽  
Ultimate Deformation ◽  
Reinforced Polymer ◽  
Laminated Bamboo

Inspired by the studies about wooden beam applied with prestressed steel plate and bamboo beam strengthened by fiber-reinforced polymer (FRP), this paper aims to explore the applicability of the prestressed basalt fiber-reinforced polymer (BFRP) sheet to the laminated bamboo beam and the variation of the flexural performance of the laminated bamboo beam applied with prestressed BFRP sheet. Two series of tests were conducted in the present study. In the first series of tests, the prestress loss of the prestressed BFRP sheet was classified and analyzed based on measured strains and deflections, which led to a derivation of the effective prestressed force considering the prestress loss. Analyses showed that the recommended value of prestress loss compared with the initial prestressed force was 22.0% based on the existing test data in the specimen preparation stage. In the second series of tests, the static loading test was performed to investigate the flexural performance of the laminated bamboo beam applied with prestressed BFRP sheet and analyze the difference between the laminated bamboo beams applied with prestressed and non-prestressed BFRP sheets. Test results showed that the no significant variation of the ultimate load and a reduction of the ultimate deformation capacity were caused by the application of the prestressed BFRP sheet.

Quantifying the Impact of Structural Fibers on the Performance of Concrete Overlays on Asphalt

2021 ◽  
Author(s):  
Thomas Burnham ◽  
Michael Wallace ◽  
Manik Barman
Keyword(s):  
Cross Sections ◽  
Plain Concrete ◽  
Fiber Reinforced Concrete ◽  
Test Facility ◽  
Asphalt Pavements ◽  
Ride Quality ◽  
Concrete Overlays ◽  
Traffic Loads ◽  
The Difference ◽  
The Impact

Concrete overlays on asphalt pavement, also known as whitetopping, are growing in popularity as an option for the rehabilitation of distressed asphalt pavements. The performance of whitetoppings over the past several decades has shown that under heavy and frequent traffic loads, they can be susceptible to panel migration and faulting due to the lack of tie bars and dowel bars within the thin cross sections. One mitigation method to reduce panel migration and faulting is the inclusion of structural fibers into the concrete mix. While structural fibers have anecdotally been shown to contribute toward better performance in whitetoppings, few studies have quantified the benefits provided by the typical dosage of fibers used in recent specifications. Two sets of similarly designed experimental test sections constructed at the MnROAD test facility in 2004 and 2013, have provided the opportunity to evaluate and quantify the impact of structural fibers on whitetopping performance. This comparison of the performance between plain concrete and fiber-reinforced concrete overlay test sections includes analysis of material properties of the mixes, the difference in response to environmental and traffic loads, typical distresses, and ride quality. Based on the results of the analysis, recommendations were made with regards to whether the types and dosages of structural fibers used in the test sections made a sufficient impact on performance.

The Influence of Polypropylene Fiber on the Performance of Concrete Pavement

2012 ◽  
Vol 178-181 ◽  
pp. 1099-1103 ◽  
Author(s):  
Hua Rong Shen ◽  
Yue Xin She ◽  
Pei Wei Gao
Keyword(s):  
Mechanical Performance ◽  
Impact Resistance ◽  
Polypropylene Fiber ◽  
Plain Concrete ◽  
Concrete Pavement ◽  
Cement Concrete Pavement ◽  
Average Crack ◽  
Tensile Splitting Strength ◽  
Resistance Performance ◽  
The Impact

This paper presents the influence of the appropriate polypropylene fibers on the performance of cement concrete pavement. The experimental results show that the fibers can obviously reduce cracks and improve the mechanical performance and durability of concrete. When the content of polypropylene fiber is 0.8 kg/m3, the time of the first crack appearance is 45min and 2h 17min later than that of the concrete samples with 0.4 kg/m3 polypropylene fiber and plain concrete. Comparing with the concrete samples with 0.4 kg/m3 polypropylene fiber and plain concrete, the indexes of average crack area, numbers of cracks per area, and total crack area per area of concrete with 0.8 kg/m3 polypropylene fiber reduce 16.2%, 33.0%, 44.3% and 26.9%, 48.1%, 62.2% respectively. Comparing with plain concrete, the 7d and 28d compressive strength of concrete with 0.4 kg/m3 and 0.8 kg/m3 polypropylene fiber enhances 3%, 4% and 4%, 2%, the 90d tensile splitting strength enhances 7% and 10%, and the impact resistance performance of concrete enhances 130% and 250% respectively.

Research of the Properties of Basalt Fiber Reinforced Polymer Bar for Continuously Reinforced Concrete Pavement

2014 ◽  
Vol 505-506 ◽  
pp. 184-187
Author(s):  
Qi Yang Liu ◽  
Ming He
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Matrix Material ◽  
Basalt Fiber ◽  
Concrete Pavement ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Contraction Joints ◽  
Basalt Fiber Reinforced Polymer

Continuously reinforced concrete pavement (CRCP) does not require any contraction joints which is a high-performance pavement structure type that just need a sufficient number of reinforced pavement longitudinal configuration to constrain sideway random crack width. With continuous basalt fiber as reinforced material and synthetic resin as the matrix material and adding appropriate adjuvants, basalt fiber reinforced polymer (BFRP) bar form a new type of material after pultrusion processing and surface treatment technologies. BFRP on the mechanical properties were studied by two kinds of test methods which are using extensometer strain detection and fiber optic strain sensing and the parameter of homegrown BFRP bars mechanical properties. Because of the lower tensile elastic modulus of BFRP bars compared with rebar, the mechanical properties of basalt fiber-steel wire composite bar has been studied along with the research corrosion and flexural properties of BFRP bar.

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