Effects of superabsorbent polymer on interfacial transition zone and mechanical properties of ultra-high performance concrete

被引：81

作者：

Liu, Jianhui ^{[1
]}

Farzadnia, Nima ^{[2
]}

Shi, Caijun ^{[1
]}

机构：

[1] Hunan Univ, Coll Civil Engn, Key Lab Green & Adv Civil Engn Mat & Applicat Tec, Changsha 410082, Hunan, Peoples R China

[2] Missouri Univ Sci & Technol, Ctr Infrastruct Engn Studies, Dept Civil Architectural & Environm Engn, Rolla, MO 65409 USA

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2020年 / 231卷

基金：

美国国家科学基金会;

关键词：

Bonding strength; Interfacial transition zone; Super-absorbent polymer; Steel fiber; Ultra-high performance concrete; CEMENT-BASED MATERIALS; PORE STRUCTURE; FIBER PULLOUT; FLY-ASH; FRACTURE-TOUGHNESS; STEEL FIBER; BOND SLIP; MICROSTRUCTURE; SHRINKAGE; AGGREGATE;

D O I：

10.1016/j.conbuildmat.2019.117142

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In this study, two particle sizes of superabsorbent polymer (SAP) with different contents (0-0.6%) were incorporated in the UHPC samples cured under two regimes: water and steam curing. The interfacial transition zone (ITZ) associated properties, namely compressive strength, flexural strength, and pullout behavior of steel fiber were evaluated. Micro-hardness method and backscattered electron (BSE) imaging examinations were also applied to investigate the underlying mechanisms of SAP performance in UHPC. The results show that the use of SAP densified the ITZ and reduced micro-cracks around the fibers. However, the pores left from SAP impaired the bonding strength and ITZ of UHPC, when high contents and large size of SAP particles were incorporated. Steam curing, though, partly compensated the bond strength loss of fibers caused by the SAP. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：13

共 41 条

[1]

[Anonymous], 2009, 132009 CCSC

[2]

[Anonymous], 2014, MAT STRUCTURES

[3]

Bentur A., 2014, Fibre reinforced cementitious composites

[4] CONTRIBUTION TO THE FORMATION MECHANISM OF THE TRANSITION ZONE BETWEEN ROCK-CEMENT PASTE [J].