Material Properties of Concrete Produced with Bio-polymer Made from Sargassum Honeri for the Repair of Bridge Deck Pavement

Hyun, Jung Hwan; Lee, Sun-Mok; Kim, Seong Su

doi:10.4334/jkci.2019.31.2.191

Cited by 1 publication

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“…Lithium carbonate facilitates the hydration of C3A and actively contributes to the formation of ettringite(3CaO·Al 2 O 3 ·3CaO·3SO 3 ·32H 2 O). This process results in rapid hardening, consequently enhancing the initial strength 10 .…”

Section: Basic Characteristics Experimentsmentioning

confidence: 99%

Mock-up performance evaluation study for crack reduction of blast furnace slag powder concrete mixed with expansive and swelling admixtures

Yoon,

Choi,

Jeon

2024

Sci Rep

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In this study, the drying shrinkage and crack reduction characteristics of blast furnace slag concrete mixed with expansive and swelling admixtures were investigated. Basic performance experiments were conducted using different mixtures of ground granulated blast-furnace slag (GGBS), with calcium sulfoaluminate as the expansive admixture and bentonite and hydroxypropyl methyl cellulose (HPMC) as swelling admixtures. Bentonite outperformed HPMC as a swelling admixture. Specimens were then prepared for mock-up tests to evaluate the drying shrinkage of blast furnace slag concrete with different combinations of bentonite, a hardening accelerator, and a self-healing agent. The addition of bentonite and calcium phosphate as a self-healing agent in small quantities reduced the drying shrinkage of the specimens, thereby reducing cracks. The cement mixture composed of 30% GGBS, 1% bentonite, and 1% calcium phosphate (30-E1-I1) showed the optimal performance among the specimens. Further, crack monitoring was performed in concrete made with ordinary Portland cement and optimal mixture 30-E1-I1. No cracks were observed for the optimal mixture. This shows that GGBS concrete can be used in practical and field applications, subject to mid- and long-term tests for cracking.

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Section: Basic Characteristics Experimentsmentioning

confidence: 99%