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Sulfate attack resistance of recycled aggregate concrete

2021-6-14  This study investigates the sulfate attack resistance of recycled aggregate concrete with NaOH-solution-treated crumb rubber (CR). For this purpose, several recycled aggregate concrete mixes were developed using different concentrations (10%, 20% and 30%) of NaOH-solution-treated CR and different CR particle sizes (0.16–0.3 mm, 0.85–2 mm and 10–20 mm).

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Sulfate Resistance of Recycled Aggregate Concrete with

2019-4-16  The object of this work was to develop a green concrete with an improved sulfate resistance. In this new type of concrete, recycled aggregates from construction and demolition (CD) waste were used as coarse aggregates, and granulated blast furnace slag (GGBS) and fly ash-based geopolymer were used to totally replace the cement in concrete ...

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Sulfate Resistance of Recycled Aggregate Concrete with

2019-4-16  There is a constant drive for the development of ultra-high-performance concrete using modern green engineering technologies. These concretes have to exhibit enhanced durability and incorporate energy-saving and environment-friendly functions. The object of this work was to develop a green concrete with an improved sulfate resistance. In this new type of

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(PDF) Sulfate Resistance of Recycled Aggregate Concrete

2019-4-16  Sulfate Resistance of Recycled Aggregate Concrete with GGBS and Fly Ash-Based Geopolymer Jianhe Xie 1 , Jianbai Zhao 1 , Junjie Wang 2, * , Chonghao Wang 1 , Peiyan Huang 3 and Chi Fang 1

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Experimental study on sulfate resistance of concrete with

2021-6-1  After obtaining a saturated surface dry of RCA with PVA-water, ten concrete design mixes were prepared, as listed in Table 5.In this table, the materials used in the concrete mixes with different percentages (0 %, 8 %, 16 %, 24 %, and 32 %) of recycling concrete aggregate and different water-cement (w/c) ratios of 0.5 and 0.3.

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Improving the sulfate resistance of recycled aggregate

2021-8-23  1. Introduction. Recycled aggregate concrete (RAC) has attracted world-wide attention during the past decades, due to its widely recognized environmental benefits in reducing the excessive construction and demolition wastes (CDW), and in protecting the non-renewable natural aggregate resources as well , .In China, the most common recycled coarse aggregate

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Evaluation of sulfate resistance of concrete with recycled

2017-10-15  The paper deals with the results of sulfate resistance of eight concrete mixtures with coarse recycled concrete aggregate/natural aggregate, CEMI/CEMIII and two different water-to-cement ratios (w/c). These concretes were immersed in 5% Na 2 SO 4 or 5% MgSO 4 solutions for 90, 180 and 365 days. The evaluation of sulfate resistance was done by ...

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Prediction of the sulfate resistance for recycled aggregate

2022-1-24  This paper aims at using ensemble learning algorithms to predict the durability evolution for RAC under sulfate attack. The initial database with 206 samples on the sulfate resistance of RAC was collected from literature , , , , , , , , , , , .Factors affecting the sulfate resistance of RAC can be divided into two groups: materials properties and environmental

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Sulphate resistance of lightweight aggregate concrete

2022-7-22  OPS lightweight aggregate concrete (OPSLWAC) mixes were prepared with different percentages of POFA as partial fine aggregate replacement. A reference specimen with the targeted 28-day compressive strength of 30 MPa and density less than 1800 kg/m 3 was prepared using natural river sand. Three concrete mixes were prepared by replacing 10% and 20% by

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Degradation Resistance and Reliability Analysis of

2020-3-16  Resistance to sulfate degradation is an important index used to measure concrete’s durability. In this study, recycled aggregate concrete (RAC) with a 0%, 30%, and 50% recycled coarse aggregate ...

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Sulfate Resistance of Recycled Aggregate Concrete with

2019-4-16  There is a constant drive for the development of ultra-high-performance concrete using modern green engineering technologies. These concretes have to exhibit enhanced durability and incorporate energy-saving and environment-friendly functions. The object of this work was to develop a green concrete with an improved sulfate resistance. In this new type of

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[PDF] Sulfate Resistance of Recycled Aggregate Concrete

2019-4-1  The proposed GRACs, showing an excellent sulfate resistance, can be used in construction projects in sulfate environments and hence can reduce the need for cement as well as the disposal of CD wastes. There is a constant drive for the development of ultra-high-performance concrete using modern green engineering technologies. These concretes have to

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Sulfate Resistance of Recycled Aggregate Concrete with

2019-4-16  This study focused on the sulfate resistance of this geopolymer recycled aggregate concrete (GRAC). A series of measurements including compression, X-ray diffraction (XRD), and scanning electron microscopy (SEM) tests were conducted to investigate the physical properties and hydration mechanisms of the GRAC after different exposure cycles in a ...

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Sulfate Resistance of Recycled Aggregate Concrete

My Research and Language Selection Sign into My Research Create My Research Account English; Help and support. Support Center Find answers to questions about products, access, use, setup, and administration.; Contact Us Have a

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Sulfate attack resistance of recycled aggregate concrete

Abstract This study investigates the sulfate attack resistance of recycled aggregate concrete with NaOH-solution-treated crumb rubber (CR). For this purpose, several recycled aggregate concrete mixes were developed using different concentrations (10%, 20% and 30%) of NaOH-solution-treated CR and different CR particle sizes (0.16–0.3 mm, 0.85–2 mm and 10–20 mm).

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Experimental Study on Sulfate Resistance of Concrete

3 concrete compressive strength was proportional to the RCA dosage. Mandal et al. [18] stated that the RCAs do not affect the compressive strength of

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Improving the sulfate resistance of recycled aggregate

2021-8-1  The paper deals with the results of sulfate resistance of eight concrete mixtures with coarse recycled concrete aggregate/natural aggregate, CEMI/CEMIII and two different water-to-cement ratios (w/c).

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Sulphate resistance of lightweight aggregate concrete

2022-7-22  OPS lightweight aggregate concrete (OPSLWAC) mixes were prepared with different percentages of POFA as partial fine aggregate replacement. A reference specimen with the targeted 28-day compressive strength of 30 MPa and density less than 1800 kg/m 3 was prepared using natural river sand. Three concrete mixes were prepared by replacing 10% and 20% by

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Degradation Resistance and Reliability Analysis of

2020-3-16  Resistance to sulfate degradation is an important index used to measure concrete’s durability. In this study, recycled aggregate concrete (RAC) with a 0%, 30%, and 50% recycled coarse aggregate ...

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清华大学土木水利学院

2022-5-25  Experimental study on the compressive and flexural behaviour of recycled aggregate concrete modified with silica fume and fibres. Construction and Building Materials, Vol.178, pp 612-623. (IF = 4.419, Q1, 中科院一区, TOP期刊).

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Sulfate Resistance of Recycled Aggregate Concrete with ...

2019-11-1  This study focused on the sulfate resistance of this geopolymer recycled aggregate concrete (GRAC). A series of measurements including compression, X-ray diffraction (XRD), and scanning electron microscopy (SEM) tests were conducted to investigate the physical properties and hydration mechanisms of the GRAC after different exposure cycles in a sulfate environment.

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Sulfate Resistance of Recycled Aggregate Concrete with ...

2019-4-16  Sulfate Resistance of Recycled Aggregate Concrete with GGBS and Fly Ash-Based Materials ( IF 3.057Pub Date 10. Jianhe Xie, Jianbai Zhao, Junjie Wang, Chonghao Wang, Peiyan Huang, Chi Fang There is a constant drive for the development of ultra-high-performance concrete using modern green engineering technologies.

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Sulfate Resistance of Recycled Aggregate Concrete

My Research and Language Selection Sign into My Research Create My Research Account English; Help and support. Support Center Find answers to questions about products, access, use, setup, and administration.; Contact Us Have a

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Sulfate Resistance of Recycled Aggregate Concrete with

2021-8-2  Materials (2019-04-01) . Sulfate Resistance of Recycled Aggregate Concrete with GGBS and Fly Ash-Based Geopolymer

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Sulfate resistance of recycled ag... preview related info

In this new type of concrete, recycled aggregates from construction and demolition (C D) waste were used as coarse aggregates, and granulated blast furnace slag (GGBS) and fly ash-based geopolymer were used to totally replace the cement in concrete. This study focused on the sulfate resistance of this geopolymer recycled aggregate concrete ...

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Evaluation of sulfate resistance of concrete with recycled

Concrete specimens submerged in both solutions up to 365 days, containing recycled concrete aggregate, CEM III and both w/c ratios, showed good resistance to sulfate attack. Characteristics related to microstructure (SEM, BSE-EDS, XRD and FTIR) were analysed on the concrete which was not sulfate resistant.

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Sulphate resistance of lightweight aggregate concrete

2022-7-22  OPS lightweight aggregate concrete (OPSLWAC) mixes were prepared with different percentages of POFA as partial fine aggregate replacement. A reference specimen with the targeted 28-day compressive strength of 30 MPa and density less than 1800 kg/m 3 was prepared using natural river sand. Three concrete mixes were prepared by replacing 10% and 20% by

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Resistance of Recycled Aggregate Concrete

2020-1-29  Recycled aggregates were widely used in the concrete industry as a replacement of natural aggregates in the last two decades. In this study, the resistance of concrete mixtures having various levels of recycled aggregate as

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Effect of Sulphate Solution on Recycled Aggregate

2022-3-8  The strength of recycled aggregate concrete was compared with strengths of natural aggregates concrete. 5. RESULTS . Effect of sulphate solution on compressive strength of RCA concrete was investigated. Compressive strength of concrete made with recycled concrete aggregate was determined. After this concrete cubes were kept in MgSO. 4

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Modifying recycled aggregate concrete by aggregate

Recycled aggregate (RA) was surface treated by two strengthening slurries prepared with sulphoaluminate cement (SAC), with or without the addition of an industrial waste, basalt powder (BP). ... , meanwhile the mechanical properties and the resistance against chloride and sulphate attacks of the prepared RAC were enhanced. Based on the ...

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