Flexural Properties of ECC‐Concrete Composite Beam

Guan, Yanhua; Yuan, Huaqiang; Ge, Zhi; Huang, Yueyue; Li, Shuai; Sun, Renjuan

doi:10.1155/2018/3138759

Cited by 14 publications

(3 citation statements)

References 16 publications

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“…Meanwhile, ECC was often applied to reinforce a variety of FRP structures. The ECC layer showed promising effects regarding inhibiting slip and considerably improving the carrying capacity of FRP under different loads, such as bending, tension, and shearing [ 34 , 35 , 36 , 37 ]. Hence, ECC generally showed a desirable bonding effect when combined with various concrete structures, which, in theory, meets the needs of the problem mentioned earlier in (III).…”

Section: Introductionmentioning

confidence: 99%

Preliminary Exploration of Economic Polypropylene-Fiber-Reinforced ECC with Superfine River Sand (SSPP-ECC) Applied to a Bridge Pavement Leveling Overlay

et al. 2022

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In response to the current common disease of concrete leveling overlays of bridge pavement in China, the feasibility of using an economic SSPP-ECC with local waste superfine sand as an alternative material for a leveling overlay was proposed in this study. To evaluate the interface bonding property in the girder between the SSPP-ECC and concrete, a slant shear test and split tensile test were designed to study the interfacial shear and tensile properties of the ordinary concrete/ordinary concrete (OC/OC) and ordinary concrete/SSPP-ECC (OC/ECC), where the results showed that SSPP-ECC could significantly improve the interface shear stress and split tensile strength compared to ordinary concrete. Furthermore, the damage status of OC/ECC no longer involved fracturing along the interface; instead, each of the two substrates was partially destroyed, which revealed that OC/ECC had a high bonding effect. Moreover, a restrained shrinkage test was carried out to evaluate the shrinkage property of SSPP-ECC, where the result showed that the shrinkage strain of SSPP-ECC was slightly lower than concrete, where the average cracking time for SSPP-ECC was far longer than for ordinary concrete under the same ambient drying conditions; furthermore, the stress rate for SSPP-ECC revealed that it was a low-cracking-risk material. Meanwhile, the crack width of SSPP-ECC was only 0.1 mm after 35 d, which showed that SSPP-ECC had a more substantial crack width control capacity relative to concrete. The test results initially verified the feasibility and great potential of economic SSPP-ECC applied in a bridge pavement leveling overlay.

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Section: Introductionmentioning

confidence: 99%

Preliminary Exploration of Economic Polypropylene-Fiber-Reinforced ECC with Superfine River Sand (SSPP-ECC) Applied to a Bridge Pavement Leveling Overlay

et al. 2022

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“…e ultimate tensile strain of ECC can be above 3%, which is 300 times larger than that of the ordinary cement concrete, and the crack width in a saturated state is below 100 μm [1][2][3]. Since the successful preparation of ECC, many scholars have carried out the engineering applications of ECC, such as highway bridge link slab, steel deck pavement, and ECC-concrete composite beam, retrofitting of structures in seismic regions [4][5][6][7][8][9]. e good mechanical properties and simple construction technology make ECC suitable for practical engineering projects.…”

Section: Introductionmentioning

confidence: 99%

Sustainable High‐Ductility Concrete with Rapid Self‐Healing Characteristic by Adding Magnesium Oxide and Superabsorbent Polymer

Lü

Liu

et al. 2020

Advances in Materials Science and Engineering

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As a class of high-ductility concrete, engineered cementitious composites (ECC) have wide application prospects in engineering fields. However, the occurrence of cracks and the limited self-healing ability hinder the development of ECC. Rapid self-healing has important significance for ECC in reducing maintenance costs and prolonging service life, which are conducive to sustainable development of ECC. Therefore, the aim of this paper is to enhance the self-healing property of ECC by adding light-burned magnesium oxide (MgO) and superabsorbent polymer (SAP) on the premise of maintaining the high ductility. First, the effect of MgO and SAP on the ductility property of ECC which is the most important feature was explored with the uniaxial tensile test. The results indicated that MgO is helpful to the strength but not conducive to the ductility of ECC, while SAP has an opposite effect. The effects of MgO and SAP on the ductility of ECC can be balanced. Later, the permeability test, scanning electron microscopy (SEM), and X-ray diffraction (XRD) were used to evaluate the effects of MgO and SAP on the self-healing property of ECC. The results showed that the combined addition of MgO and SAP shows much better effect than the individual addition and can cut the healing time by half. Overall, it is concluded that ECC with MgO and SAP have the potential for self-healing, and the ductility can also be reconciled.

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“…Strengthening of RC structures is critically important for several reasons [1][2][3][4][5][6][7]. One is to restore the load-bearing capacity of deteriorated concrete infrastructures because of aging or damage.…”

Section: Introductionmentioning

confidence: 99%

Axial Behaviour of Slender RC Circular Columns Strengthened with Circular CFST Jackets

Zhu

et al. 2018

Advances in Civil Engineering

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is paper investigates the axial behavior of slender reinforced concrete (RC) columns strengthened with concrete filled steel tube (CFST) jacketing technique. It is realized by pouring self-compacting concrete (SCC) into the gap between inner original slender RC columns and outer steel tubes. Nine specimens were prepared and tested to failure under axial compression: a control specimen without strengthening and eight specimens with heights ranging between 1240 and 2140 mm strengthened with CFST jacketing. Experimental variables included four different length-to-diameter (L/D) ratios, three different diameter-to-thickness (D/t) ratios, and three different SCC strengths. e experimental results showed that the outer steel tube provided confinement to the SCC and original slender RC columns and thus effectively improved the behavior of slender RC columns. e failure mode of slender RC columns was changed from brittle failure (concrete peel-off) into ductile failure (global bending) after strengthening. And, the load-bearing capacity, material utilization, and ductility of slender RC columns were significantly enhanced. e strengthening effect of CFST jacketing decreased with the increase of L/D ratio and D/t ratio but showed little variation with higher SCC strength. An existing expression of load-bearing capacity for traditional CFST columns was extended to propose a formula for the load-bearing capacity of CFST jacketed columns, and the predictions showed good agreement with the experimental results. Recently, a novel technique, CFST jacketing, has become an option to strengthen concrete columns because of the superior performance of CFST columns (e.g., high loadbearing capacity and good ductility). It has been successfully applied in the strengthening of RC bridge piers [20,21]. CFST jacketing is realized by the installation of in-field welded steel tube around the original RC column and

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Flexural Properties of ECC‐Concrete Composite Beam

Cited by 14 publications

References 16 publications

Preliminary Exploration of Economic Polypropylene-Fiber-Reinforced ECC with Superfine River Sand (SSPP-ECC) Applied to a Bridge Pavement Leveling Overlay

Preliminary Exploration of Economic Polypropylene-Fiber-Reinforced ECC with Superfine River Sand (SSPP-ECC) Applied to a Bridge Pavement Leveling Overlay

Sustainable High‐Ductility Concrete with Rapid Self‐Healing Characteristic by Adding Magnesium Oxide and Superabsorbent Polymer

Axial Behaviour of Slender RC Circular Columns Strengthened with Circular CFST Jackets

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