A strain-hardening cementitious composites with the tensile capacity up to 8%

Yu, Kequan; Wang, Yichao; Yu, Jiangtao; Xu, Sheng

doi:10.1016/j.conbuildmat.2017.01.060

Cited by 415 publications

(78 citation statements)

References 24 publications

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“…Engineered cementitious composite (ECC) is a kind of designed composite material reinforced with random short fibers with a volume fraction less than 2% to 3%, which features tensile strain hardening and multiple cracking properties [31]. The ultimate tensile strain can be more than 3%, even up to 8%, which is 300 to 800 times higher than that of normal or ordinary fiber reinforced concrete [32][33][34][35][36]. Cracking is one of the main reasons for the performance deterioration of material and then the structure; however, concrete is low in tension and is prone to cracking.…”

Section: Introductionmentioning

confidence: 99%

Strengthening of RC Structures by Using Engineered Cementitious Composites: A Review

Shang

et al. 2019

Sustainability

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This paper presents a review of the recent work assessing the performance of building structures strengthened with engineered cementitious composite (ECC). ECC characterizes tensile strain hardening and multiple cracking properties, as well as strong interfacial bonding performance with substrate concrete, which makes it a promising retrofitting material. A lot of researches have been conducted on reinforced concrete (RC) structures, including beams, columns, beam–column joints, and fire-damaged slabs, strengthened with ECC material, and an extensive collection of valuable conclusions were obtained. These strengthening systems usually combine ECC with FRP textiles or steel bars to form a composite strengthening layer. The review demonstrates that ECC strengthening can greatly improve the performance of RC structures.

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Section: Introductionmentioning

confidence: 99%

Strengthening of RC Structures by Using Engineered Cementitious Composites: A Review

Shang

et al. 2019

Sustainability

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“…Comprehensive methods can be employed to increase the bear capacity of reinforced concrete (RC) structures, such as structural retrofitting [1][2][3][4] and the use of high-performance materials [5][6][7][8][9][10][11][12][13][14][15]. Recently, a newly arising bolted side-plating (BSP) technique, i.e., attaching steel plates to the side faces of reinforced concrete (RC) beams using anchor bolts, has become increasingly popular all over the world [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Shear Performance of Reinforced Concrete Beams Strengthened with Bolted Side-Plating

Liu

Chen

et al. 2019

Sustainability

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To investigate the residual shear capacity of post-fire bolted side-plated (BSP) reinforced concrete (RC) beams with different depths of steel plate and types of anchor adhesive, i.e., magnesium oxychloride cement (MOC) and HIT-RE500, a control beam and five BSP beams were fabricated, of which two were exposed to fire in accordance with ISO834 temperature curve. Four-point bending shear tests were conducted to investigate the influence of elevated temperature on the failure mode, cracking load, shear capacity, stiffness, ductility and strain development, etc. The shear capacities of RC beams were found to be improved significantly by using the BSP technique. However, the stiffness of BSP beams was seriously degraded after exposed to fire, but the reduction in shear capacity was negligible, whereas the ductility and the strain of longitudinal reinforcement were obviously increased. Thus, the failure-mode was changed from shear failure to flexural failure. Regarding the adhesive mortar used for bolt anchorage, magnesium oxychloride cement (MOC) achieved higher shear capacity and better ductility but lower stiffness for BSP beams compared with HIT-RE500. Additionally, increasing the depth of bolted steel plates effectively improved the shear performance of BSP beams. In the tests, uneven relative slips were observed on the plate-RC interface due to the shear deformation of bolt shafts and the plates’ tensile principal stress perpendicular to the main diagonal crack, which proved the deformation lag of the bolted steel plates with respect to the RC beam. The outcomes of this study provide a better understanding on the shear performance of BSP beams at room temperatures and at fire conditions.

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“…Its tensile strain capacity can reach 3–5%, whereas the maximum crack width is restricted to only 60–100 μm [ 11 , 12 ]. Recently, a new kind of ECC material with a tensile strain capacity as large as 8% has been manufactured with randomly dispersed polyethylene (PE) fiber [ 13 ]. Therefore, the use of ECC could significantly improve the durability [ 14 , 15 ] of concrete components and structures, thereby reducing maintenance cost during their lifetime and meeting the demands of modern civil engineering.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Carbonation Durability of Engineered Cementitious Composites Reinforced by Polypropylene and Hydrophilic Polyvinyl Alcohol Fibers

Zhang

Yin

et al. 2018

Materials

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Herein, the mechanical properties and carbonation durability of engineered cementitious composites (ECC) were studied. For the cost-efficient utilization of ECC materials, different types of specimens were cast with polypropylene (PP) and hydrophilic polyvinyl alcohol (HPVA) fibers. The compressive strength, Poisson’s ratio, strength-deflection curves, cracking/post-cracking strength, impact index, and tensile strain-stress curves of two types of ECC materials, with differing fiber contents of 0 vol %, 1 vol %, 1.5 vol %, and 2 vol %, were investigated with the use of compressive tests, four-point bending tests, drop-weight tests, and uniaxial tensile tests. In addition, the matrix microstructure and failure morphology of the fiber in the ECC materials were studied by scanning electron microscopy (SEM) analysis. Furthermore, carbonation tests and characterization of steel corrosion after carbonization were employed to study durability resistance. The results indicated that for both PP fiber- and HPVA fiber-reinforced ECCs, the compressive strength first increases and then decreases as fiber content increases from 0 vol % to 2 vol %, reaching a maximum at 1 vol % fiber content. The bending strength, deformation capacity, and impact resistance show significant improvement with increasing fiber content. The ECC material reinforced with 2 vol % PP fiber shows superior carbonized durability with a maximum carbonation depth of only 0.8 mm.

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A strain-hardening cementitious composites with the tensile capacity up to 8%

Cited by 415 publications

References 24 publications

Strengthening of RC Structures by Using Engineered Cementitious Composites: A Review

Strengthening of RC Structures by Using Engineered Cementitious Composites: A Review

Experimental Study on the Shear Performance of Reinforced Concrete Beams Strengthened with Bolted Side-Plating

Mechanical Properties and Carbonation Durability of Engineered Cementitious Composites Reinforced by Polypropylene and Hydrophilic Polyvinyl Alcohol Fibers

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