Effect of Internal Pores Formed by a Superabsorbent Polymer on Durability and Drying Shrinkage of Concrete Specimens

被引：16

作者：

Kim, Il-Sun ^{[1
]}

Choi, So-Yeong ^{[1
]}

Choi, Yoon-Suk ^{[2
]}

Yang, Eun-Ik ^{[3
]}

机构：

[1] Gangneung Wonju Natl Univ, Disaster Prevent Res Inst, Jukheon Gil 7, Gangneung Si 25457, Gangwon Do, South Korea

[2] Construct Technol Res Ctr, Korea Conform Labs, Gasan Digital 1 Ro, Seoul 08503, South Korea

[3] Gangneung Wonju Natl Univ, Dept Civil Engn, Jukheon Gil 7, Gangneung Si 25457, Gangwon Do, South Korea

来源：

MATERIALS | 2021年 / 14卷 / 18期

基金：

新加坡国家研究基金会;

关键词：

superabsorbent polymer; compressive strength; drying shrinkage; pore size distribution; chloride penetration depth; durability; CEMENT-BASED MATERIALS; SUPER ABSORBENT POLYMERS; AUTOGENOUS SHRINKAGE; PERFORMANCE; SAP; ABSORPTION;

D O I：

10.3390/ma14185199

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, the effect of internal pores formed by a superabsorbent polymer (SAP) was analyzed by evaluating the compressive strength, chloride penetration depth, drying shrinkage, and pore size distribution of SAP-containing concrete, while securing workability using a water-reducing agent (WRA). The experimental results showed that the amount of WRA necessary increased as the amount of SAP added increased, and that the compressive strength was the highest when the SAP content was 1.5% of the concrete mix. Drying shrinkage tended to decrease as the SAP content increased, and it decreased by approximately 31-41% when the SAP content was 2.0% compared to that of the reference mix. The SAP expanded by approximately three times inside concrete, and it was distributed within the internal pores of air-entrained concrete. The optimal SAP content in concrete mix was 1.5%, and an SAP content of 2.0% or higher adversely affected the workability and compressive strength.

引用

页数：15

共 38 条

[1] [Anonymous], 2007, C150 ASTM
[2] [Anonymous], 2010, ASTM C143
[3] [Anonymous], 2014, ASTM C39
[4] [Anonymous], 2006, C457 ASTM
[5] [Anonymous], 2008, C157 ASTM
[6] [Anonymous], 2003, C231 ASTM
[7] Assmann A., 2013, THESIS U STUTTGART S
[8] Comparison of Drying Shrinkage of Concrete Specimens Recycled Heavyweight Waste Glass and Steel Slag as Aggregate
Choi, So Yeong
Kim, Il Sun
Yang, Eun Ik
[J]. MATERIALS, 2020, 13 (22) : 1 - 15
[9] The Use of Superabsorbent Polymers in High Performance Concrete to Mitigate Autogenous Shrinkage in a Large-Scale Demonstrator
De Meyst, Laurence
Kheir, Judy
Filho, Jose Roberto Tenorio
Van Tittelboom, Kim
De Belie, Nele
[J]. SUSTAINABILITY, 2020, 12 (11)
[10] Gil Damian Marek, 2018, E3S Web of Conferences, V49, DOI 10.1051/e3sconf/20184900030

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