Mechanical properties of concrete mixed with recycled powder produced from construction and demolition waste

Xiao, Jianzhuang; Ma, Zhiming; Sui, Tongbo; Akbarnezhad, Ali

doi:10.1016/j.jclepro.2018.03.277

Cited by 314 publications

(102 citation statements)

References 38 publications

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“…Recycling the waste concrete and bricks into recycled aggregate (RA) is the most effective method of reducing the amount of construction and demolition (C&D) wastes, which meets the sustainable development of construction industry [31,32]. e chloride permeability of recycled aggregate concrete (RAC) has been investigated by many scholars, and the results highlight that the addition of RA increases the chloride permeability [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Effects of High Temperature and Cooling Pattern on the Chloride Permeability of Concrete

Duan

2019

Advances in Civil Engineering

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Concrete structure is frequently subjected to the fire attack, whereas the permeability of concrete with fire-damage has received little consideration. is paper aims to investigate the chloride permeability of plain concrete and recycled aggregate concrete (RAC) with fire-damage, and the effects of various cooling patterns and recuring treatment on the chloride permeability are also studied. e results manifest that the elevated temperatures result in an increase in the fire-damage and chloride permeability of concrete, and that the increase becomes more obvious with the temperature above 400°C. Attributing to the water-cooling which provides a recuring environment, the chloride permeability after water-cooling is lower than that after air-cooling when the temperature is 200°C. Whereas when the temperature is above 400°C, the chloride permeability after water-cooling becomes higher than that after air-cooling, due to an extra damage that the water-cooling produces. e recuring treatment can reduce the chloride permeability of concrete with fire-damage, and the reduction becomes more significant when the concrete suffers a serious fire-damage. Exposing to the same condition of high temperature, the addition of recycled aggregate (RA) further boosts the fire-damage and chloride permeability of concrete. Particularly, the chloride permeability increases with the increasing of RA replacement ratios, linearly, and the increased temperatures further lead to an increase in the slope of the fitting straight line.

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Section: Introductionmentioning

confidence: 99%

Effects of High Temperature and Cooling Pattern on the Chloride Permeability of Concrete

Duan

2019

Advances in Civil Engineering

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“…In China, the rapid urbanization which reaches to about 58.5% in 2017 results in a massive construction of the new building along with the demolition of the old building [25,26]. Figure 1 gives the output of C&D wastes from 2008 to 2017 in China, and the results show that the amount of C&D wastes generally increases with increasing years, and it is, respectively, 1.6 and 1.8 billion tons in 2016 and 2017 [27]. For e ectively reducing the amount of C&D wastes in China, the recycling technology and related studies on the C&D wastes were conducted.…”

Section: Characteristics Of Recycledmentioning

confidence: 99%

Durability Studies on the Recycled Aggregate Concrete in China over the Past Decade: A Review

Yang

et al. 2019

Advances in Civil Engineering

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Since China hosted the Olympic Games in 2008, a mass of construction and demolition (C&D) wastes were produced with the rapid urbanization construction. Recycling the C&D waste into recycled aggregates (RA) is an effective method for reducing the amount of C&D wastes. Many studies on the properties of RA and the durability of recycled aggregate concrete (RAC) were conducted in China over the past decade. Due to the restrictions of various languages, some valuable studies on the durability of RAC are hard to be acquired by the scholars around the world. erefore, this paper is developed to review the studies on the durability of RAC in China, and the shrinkage behavior, chloride permeability, carbonation behavior, and freeze-thaw resistance of RAC are, respectively, introduced. Considering the waste concrete, bricks, and ceramics used in preparing RA are frequently mixed together in China, this study proposes an index of average water absorption rate to quantify the effects of RA types, quality, and replacement percentages on the durability of RAC. Meanwhile, the relationship between the average water absorption rate of RA and the durability parameters of RAC is established. Finally, the improving methods of RAC durability are introduced, and the RA particle shaping and carbonation modification are emphasized.

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“…An experimental and analytical assessment of the mechanical behavior of concrete using seawater and sea‐sand with or without RCA is conducted. The early‐age cracking behavior is investigated by means of knife‐edge binding method as its results can be used to estimate the shrinkage behavior and crack control of concrete, which can indicate the durability and workability of concrete accordingly . Furthermore, the stress–strain relationship of SSC in compression is studied.…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior of concrete using seawater and sea‐sand with recycled coarse aggregates

Xiao

Zhang

et al. 2019

Structural Concrete

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Adopting locally available seawater and sea-sand to produce concrete in marine and coastal projects is considered sustainable in concrete industry. This paper studies the mechanical behavior of seawater sea-sand concrete (SSC) and explores the feasibility of mixing SSC with recycled coarse aggregate (RCA). The early-age cracking and mechanical behaviors of SSC with or without the addition of RCA are experimentally studied. The results demonstrate that, compared with conventional concrete, the compressive strength of SSC with natural coarse aggregate (SSNAC) at 7 days increases by 36-76%, and the compressive strength at 28 days is similar while the compressive strength at 180 days decreases by 3.7-10.2%. The addition of seawater and sea-sand improves the mechanical behavior of recycled aggregate concrete, but deteriorates the early-age cracking behavior. Furthermore, the stress-strain relationship of SSNAC is analyzed, and applicability of the existing model is evaluated.cracking behavior, mechanical behavior, recycled coarse aggregate (RCA), seawater sea-sand concrete (SSC), stress-strain model

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Mechanical properties of concrete mixed with recycled powder produced from construction and demolition waste

Cited by 314 publications

References 38 publications

Effects of High Temperature and Cooling Pattern on the Chloride Permeability of Concrete

Effects of High Temperature and Cooling Pattern on the Chloride Permeability of Concrete

Durability Studies on the Recycled Aggregate Concrete in China over the Past Decade: A Review

Mechanical behavior of concrete using seawater and sea‐sand with recycled coarse aggregates

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