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Technical Journal, Vol. 17 No. 4, 2023.

Original scientific paper

https://doi.org/10.31803/tg-20230106211441

Properties of CLC According to Replacement Ratio of Cao-CSA Expansive Additive

Yong-Gu Kim ; Hanbat National University, 125, Dongseo-daero, Yuseong-gu, Daejeon, Korea
Chang-Woo Lee ; Hanbat National University, 125, Dongseo-daero, Yuseong-gu, Daejeon, Korea
Woo-Jun Hwang ; Hanbat National University, 125, Dongseo-daero, Yuseong-gu, Daejeon, Korea
Sang-Soo Lee ; Hanbat National University, 125, Dongseo-daero, Yuseong-gu, Daejeon, Korea *

* Corresponding author.

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Abstract

According to the National Statistical Office's 2019 Population and Housing Survey in August 2020, the number of apartments, including apartments, was about 14 million last year, accounting for 77.2% of all houses, of which 11.287 million were 80.6% of apartments. Based on this change in housing trends, researchers have developed and studied cellular light-weight concrete (CLC) that can be cured at room temperature and normal pressure with advantages such as light weight, insulation, and construction. There have been several studies in Korea, including state-run projects, but they have not been commercialized, but the biggest reason is that stability has not been secured. Therefore, to improve the reliability of CLC that can be cured at normal temperature and pressure, this study attempts to analyze the properties of CLC by incorporating CaO-CSA expansive additive. Based on the drying density of 0.55-0.65 kg/m3, cement, blast furnace slag, animal foaming additive and fiber are utilized to analyze the properties of CLC with CaO-CSA expansive and the results are as follows. By using the CaO-CSA expansive additive, it is determined that the formation of calcium hydroxide and ettringite fills the CLC between the tobermorite layers and the internal structure becomes dense. Currently, based on KS F 2701, the compression strength based on 0.6 items is more than 4.9 MPa, and the strength is about twice as strong as that of the existing CLC, and durability of the CLC are improved by incorporating CaO-CSA expansive additive.

Keywords

CaO-CSA expansive additive; cellular light-weight concrete (CLC); drying shrinkage; settlement; tobermorite

Hrčak ID:

308679

URI

https://hrcak.srce.hr/308679

Publication date:

15.12.2023.

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