Study on the Effectiveness of Shrinkage Reducing Admixtures on Plastic Shrinkage of Concrete

Arya, Ekta; James, Jerison Scariah; John, Elson

doi:10.1007/978-3-030-26365-2_14

Cited by 5 publications

(10 citation statements)

References 6 publications

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“…Similar observations were done in the literature published by Matalkah et al 22 and Arya et al 27 . This process was carried out after the specimen was demolded.…”

Section: Resultssupporting

confidence: 63%

“…A slight deviation was noticed in the study done by Yasue et al 65 where the less gradual increase in the bleeding was observed after 200 min. During the stiffening concrete acquires the free water for hydration which could decline the amount of free water in the mix 24,27 . This causes a reduction in bleeding and the cessation of bleeding occurred when cement reaches its initial setting time.…”

Section: Resultsmentioning

confidence: 99%

“…During the stiffening concrete acquires the free water for hydration which could decline the amount of free water in the mix. 24,27 This causes a reduction in bleeding and the cessation of bleeding occurred when cement reaches its initial setting time. Furthermore, comparing MC and MH concretes, the bleeding rate of MC concrete is higher than MH concrete irrespective to the MFA replacement levels.…”

Section: Rate Of Bleedingmentioning

confidence: 99%

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Plastic settlement and hardened state assessments of manufactured sand made concrete for varying microfine levels

Arulmoly

Konthesingha

Nanayakkara

2022

Structural Concrete

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Manufactured sand (MS) has been started utilizing as an alternative in constructions due to the escalated demand for river sand (RS). The microfine aggregate (MFA) is a salient constituent in manufactured sand, which is a crushed reactive form of parent rocks having particles less than 0.075 mm. This paper presents the effects of varying microfine aggregate levels on bleeding, plastic shrinkage cracking (PSC) and compressive strength of MS made concrete. Two types of MS were utilized: MS from Hornblende‐Gneiss rock (MH) and MS from Charnockite rock (MC) and the MFA level was ranged from 0% to 12% at 3% increments and the reference concrete was prepared with RS alone. With the MFA levels, the bleeding of MS concretes was reduced where, at 0% MFA level the maximum bleeding rates were observed for MC (1.63 kg/m2) and MH (0.84 kg/m2) concretes. PSC results were analyzed from an image processing technique, which revealed an increasing trend of mean and maximum crack widths, crack length and crack area with the MFA levels. At 0% MFA, the mean crack width of MC (0.19 mm) and MH (0.17 mm) concretes manifested marginally similar to RS concrete (0.17 mm). The decreasing bleeding with the MFA levels can be attributed to the increasing severity to PSC. Moreover, the optimum 28 days compressive strength of MC (57.5 MPa) and MH (56.1 MPa) concretes was achieved at 3% MFA level which are higher than RS concrete (51.5 MPa). Consequently, the MFA level should be limited to 3% for better plastic and hardened performance of MS made concrete.

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“…Similar observations were done in the literature published by Matalkah et al 22 and Arya et al 27 . This process was carried out after the specimen was demolded.…”

Section: Resultssupporting

confidence: 63%

Section: Resultsmentioning

confidence: 99%

Section: Rate Of Bleedingmentioning

confidence: 99%

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Plastic settlement and hardened state assessments of manufactured sand made concrete for varying microfine levels

Arulmoly

Konthesingha

Nanayakkara

2022

Structural Concrete

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“…But in a deep sense, concrete shrinks and overtime in the plastic period causes cracking, which decreases its service life period. The volume reduces in three dimensions during this plastic period and stresses develop within the concrete, which may lead to cracking 2 . Many shrinkage‐reducing agents have been deployed in concrete in past years.…”

Section: Introductionmentioning

confidence: 99%

“…The volume reduces in three dimensions during this plastic period and stresses develop within the concrete, which may lead to cracking. 2 Many shrinkage-reducing agents have been deployed in concrete in past years. Among them, shrinkage reducing admixture (SRA) is too much popular and easily available in the local market.…”

Section: Introductionmentioning

confidence: 99%

Effect of natural rubber latex on the shrinkage behavior and porosity of geopolymer concrete

Rath

2021

Structural Concrete

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Shrinkage‐reducing admixture has been proved as the best solution to reduce the shrinkage cracks on the surface of the concrete. Various shrinkage‐reducing admixtures available in the local market are chemical, highly hazardous, and limited use in concrete. In the present research, rubber latex was used by replacing water up to 2% in geopolymer concrete. Volumetric shrinkage for geopolymer concrete with different doses of rubber latex was determined and compared those results with traditional cement concrete of the same mix. The relation between volumetric shrinkage and porosity of concrete was studied at a deep level. It was found that a large number of micropores of concrete were reduced by using 2% of rubber latex resulting in decrease in shrinkage significantly. By using rubber latex in concrete, a hazardous expensive chemical shrinkage‐reducing admixture can be replaced by a low‐cost nonhazardous organic substance.

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Influence of Alkali Resistant Glass Fiber on the Reduction of Plastic Shrinkage Cracking of Self Compacting Concrete

George¹,

Thomas²

2020

Lecture Notes in Civil Engineering

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Study on the Effectiveness of Shrinkage Reducing Admixtures on Plastic Shrinkage of Concrete

Cited by 5 publications

References 6 publications

Plastic settlement and hardened state assessments of manufactured sand made concrete for varying microfine levels

Plastic settlement and hardened state assessments of manufactured sand made concrete for varying microfine levels

Effect of natural rubber latex on the shrinkage behavior and porosity of geopolymer concrete

Influence of Alkali Resistant Glass Fiber on the Reduction of Plastic Shrinkage Cracking of Self Compacting Concrete

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