Article: Effect of superplasticiser mixing time on pumping characteristics of concrete mixtures Journal: International Journal of Structural Engineering (IJSTRUCTE) 2024 Vol.14 No.4 pp.341 - 355 Abstract: This article discusses experimental results related to the assessment of concrete slump and pump parameters utilising varying proportions of superplasticisers at two distinct time intervals: the initiation of mixing and the end of curing period. The test findings indicate that the pumpability of concrete mixes depends on the specific superplasticiser ratio used during each designated time. Furthermore, the slump of concrete mixes exhibits notable recovery when utilising a specific admixture ratio at the end of the concrete curing process. Additionally, the friction parameters, represented as shear stress (<i>τ</i>) and viscous surface friction (<i>η</i>), exhibit improvement with the gradual incorporation of admixture content at different stages of the concrete's curing period. The optimal proportion of admixture introduced at mixing initiation falls within the range of 20%-40%. Importantly, the addition of additives in various stages during the concrete mixing period, at judicious ratios, does not have adverse effects on concrete strength. Inderscience Publishers - linking academia, business and industry through research

Title: Effect of superplasticiser mixing time on pumping characteristics of concrete mixtures

Authors: Quang-Nhat Pham; Van-Nhan Vu; Phu-Anh-Huy Pham

Addresses: Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam; Faculty of Civil Engineering, Duy Tan University, Da Nang, 550000, Vietnam ' Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam; Faculty of Civil Engineering, Duy Tan University, Da Nang, 550000, Vietnam ' Institute of Research and Development, Duy Tan University, Da Nang, 550000, Vietnam; Faculty of Civil Engineering, Duy Tan University, Da Nang, 550000, Vietnam

Abstract: This article discusses experimental results related to the assessment of concrete slump and pump parameters utilising varying proportions of superplasticisers at two distinct time intervals: the initiation of mixing and the end of curing period. The test findings indicate that the pumpability of concrete mixes depends on the specific superplasticiser ratio used during each designated time. Furthermore, the slump of concrete mixes exhibits notable recovery when utilising a specific admixture ratio at the end of the concrete curing process. Additionally, the friction parameters, represented as shear stress (τ) and viscous surface friction (η), exhibit improvement with the gradual incorporation of admixture content at different stages of the concrete's curing period. The optimal proportion of admixture introduced at mixing initiation falls within the range of 20%-40%. Importantly, the addition of additives in various stages during the concrete mixing period, at judicious ratios, does not have adverse effects on concrete strength.

Keywords: contact slip threshold; superplasticiser; admixture; concrete pumping; concrete slump.

DOI: 10.1504/IJSTRUCTE.2024.142064

International Journal of Structural Engineering, 2024 Vol.14 No.4, pp.341 - 355

Received: 21 Oct 2023
Accepted: 14 Feb 2024
Published online: 07 Oct 2024 *

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Title: Effect of superplasticiser mixing time on pumping characteristics of concrete mixtures

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