Hardened property changes due to the pumping process of self-consolidating concrete

被引：1

作者：

Li, Fumin ^{[1
,2
,3
]}

Shen, Wenkai ^{[4
]}

Yuan, Qiang ^{[5
]}

Chen, Zheng ^{[6
]}

Zhang, Shuqing ^{[6
]}

Ji, Youhong ^{[7
]}

Zeng, Rong ^{[7
]}

Wu, Youwu ^{[7
]}

Lao, Lilin ^{[7
]}

Shi, Caijun ^{[1
,2
,3
]}

机构：

[1] Hunan Univ, Coll Civil Engn, Changsha 410082, Peoples R China

[2] Key Lab Green & Adv Civil Engn Mat & Applicat Tech, Changsha 410082, Peoples R China

[3] Int Innovat Ctr Green & Adv Civil Engn Mat Hunan P, Changsha 410082, Peoples R China

[4] Qingdao Univ Technol, Innovat Inst Sustainable Maritime Architecture Res, Qingdao 266033, Peoples R China

[5] Cent South Univ, Natl Engn Res Ctr High Speed Railway Construct, Sch Civil Engn, Changsha 410075, Peoples R China

[6] Guangxi Univ, Sch Civil Engn & Architecture, Key Lab Disaster Prevent & Struct Safety, China Minist Educ, Nanning 530004, Peoples R China

[7] China Resources Cement Tech R&D Guangxi Co Ltd, Nanning, Peoples R China

来源：

CEMENT & CONCRETE COMPOSITES | 2024年 / 148卷

基金：

中国国家自然科学基金;

关键词：

Self-consolidating concrete (SCC); Pumping; Mechanical properties; Air-void system; Durability; Shrinkage; LUBRICATION LAYER PROPERTIES; SHRINKAGE; BEHAVIOR; PREDICTION; HYDRATION;

D O I：

10.1016/j.cemconcomp.2024.105481

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Pumping of self-consolidating concrete (SCC) is a vital construction technique. Curiosities are aroused by the effect of this intense physical process on the hardened properties of SCC. To examine this issue, a total of seven SCC mixtures are pumped at constant flow rates in pipelines with lengths of 324, 600, and 912 m. Parameters related to the hydration stages, air-void system, compressive strength, elastic modulus, and shrinkage at early ages are tested on specimens made of concrete before and after pumping. Results of tested samples find that the spacing factor grows, but the specific surface lessens after pumping. Also, in most cases, the compressive strength and elastic modulus decrease due to the pumping. The variations of these two factors are linearly related to the pumping distance in most cases. Additionally, the variations in the early age of shrinkage cracking show a dependency on the concrete compositions, temperature, and pumping characteristics.

引用

页数：15

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