Experimental Study of Reinforced Concrete T-Beams Strengthened with a Composite of Prestressed Steel Wire Ropes Embedded in Polyurethane Cement (PSWR–PUC)

Zhang, Kexin; Sun, Quansheng

doi:10.1007/s40999-017-0264-x

Cited by 29 publications

(20 citation statements)

References 25 publications

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“…The main components of PUC are polyurethane and cement, mixed together [3][4][5][6]. The hardness range of this material is 10-100 (IRHD), and it possesses good chemical resistance, flexibility, adhesion and film-forming properties.…”

Section: Experimental Program and Testing Methodsmentioning

confidence: 99%

“…The availability of many tests and the number of projects demonstrate that the use of polyurethane cement (PUC) materials to strengthen bridge structures is becoming a feasible technique [1][2][3][4][5][6]. PUC material can make the repair or retro-fitting of bridge elements more effective, easier to handle, and cheaper because of its very simple method of implementation and its excellent properties and flexural behaviour [1].…”

Section: Introductionmentioning

confidence: 99%

“…The crack width measurement also indicates that this technique could increase the durability of the bridge. The PUC material is used as the embedded material of steel wire ropes in reinforcement [5], and the results showed significantly enhanced strength, stiffness, and ability to constrain cracks. The PUC also increases the durability of the steel wire ropes and promotes secure anchoring.…”

Section: Introductionmentioning

confidence: 99%

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Bending Fatigue Properities Research of Polyurethane Cement (Puc)

Zhang¹,

Sun²

2019

CEJ

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In order to study the fatigue properties of polyurethane cement (PUC), the newly bridge reinforcement material, three different densities of PUC beams were tested. The studies indicate that the fatigue life of PUC material obeys two parameters Weibull distribution, and the double logarithm fatigue equation with different failure probability is established by this mathematical model. The fatigue life equations of the PUC with three different densities (PUC1500, PUC1200 and PUC800) were established when the failure rate was 0.5. The fatigue life of PUC1500 is the largest, and the fatigue life of PUC material decreases with the decrease of its density. Under the action of bending fatigue load, the fatigue strain of PUC material can be divided into three phases.

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Section: Experimental Program and Testing Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bending Fatigue Properities Research of Polyurethane Cement (Puc)

Zhang¹,

Sun²

2019

CEJ

Self Cite

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“…Compared with traditional reinforcing methods, this method has the advantages of having strong adhesion to the concrete as well as good fluidity, and it is environmentally friendly, light weight, high in toughness, and easy for use in construction, etc. PUC composite has been gradually applied to the reinforcement and renovation of concrete bridges and pier columns [5][6][7]. However, the reinforcement is limited to the improvement of strength, stiffness, and durability.…”

Section: Introductionmentioning

confidence: 99%

Study on the Self-Monitoring of Bending Fatigue Cumulative Damage for Carbon Nanofiber Polyurethane Cement

Yang

Sun

2019

Applied Sciences

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Polyurethane cement (PUC) is a kind of high-strength composite bending and strengthening material that is made by adding an appropriate amount of super fine aggregate, such as cement, into the polyurethane matrix. Carbon nanofiber polyurethane cement (CNFPUC) prepared by adding an appropriate amount of carbon nanofiber (CNF) can significantly reduce the resistivity of PUC. In order to reveal the change regulation of electrical resistivity of CNFPUC under fatigue load, the four-point bending fatigue life test of CNFPUC under different temperatures and stress levels was conducted by using a multifunction test device on a mixture of UTM-30 asphalt. The results showed that the resistivity increased slightly with the increase of bending strain in the process of the CNFPUC bending test, which presented a two-stage trend of a small increase and a sharp increase, and the maximum bending tensile stress was up to 26.65 MPa. Under periodic load, the resistivity increased with the increase of stress level and cycle times. When the damage amount reached 90%, the fatigue resistivity increased sharply, and with the increase of stress level, the effect of temperature on resistivity decreased gradually. This study may provide a theoretical basis for practical engineering applications.

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“…Adding cement into PU leads to polyurethane cement (PUC), which has the advantages of high compressive strength, excellent fluidity, environmental friendliness, low weight and easy construction. Therefore, PUC has been gradually applied for the reinforcement of highways and bridges and in the construction industry [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Dispersion and Pressure Sensitivity of Carbon Nanofiber-Reinforced Polyurethane Cement

2018

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The sensitivity of carbon nanofiber polyurethane cement (CNFPUC) was evaluated to determine whether the cement can act as an intelligent reinforcement material. The percolation thresholds at different polymer-to-cement ratios were determined through experimentation. Taking a specific carbon nanofiber (CNF) content of the percolation zone, several CNFPUC mixtures with different poly-ash ratios and silica fume contents were made. They were then sampled from the mixture and poured into a hexahedron CNFPUC test block; the coefficient of variation of resistance and the piezoresistive characteristics under axial load were examined and the blocks were examined by scanning electron microscope. The sensitivity of the CNFPUC mixture was evaluated via the resistance variation coefficient of a sample hexahedron. For different CNF dosages, the critical value of the variation coefficient was used to assess the sensitivity characteristic by fitting the conic curve. These findings may provide a novel and simple method for determining the sensitivity of CNFPUC mixtures.

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Experimental Study of Reinforced Concrete T-Beams Strengthened with a Composite of Prestressed Steel Wire Ropes Embedded in Polyurethane Cement (PSWR–PUC)

Cited by 29 publications

References 25 publications

Bending Fatigue Properities Research of Polyurethane Cement (Puc)

Bending Fatigue Properities Research of Polyurethane Cement (Puc)

Study on the Self-Monitoring of Bending Fatigue Cumulative Damage for Carbon Nanofiber Polyurethane Cement

Dispersion and Pressure Sensitivity of Carbon Nanofiber-Reinforced Polyurethane Cement

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