Printability and advantages of 3D printing mortar with 100% recycled sand

被引：60
|
作者：
Zou, Shuai [1 ]
Xiao, Jianzhuang [1 ,2 ]
Ding, Tao [1 ]
Duan, Zhenhua [1 ]
Zhang, Qingtian [1 ]
机构：
[1] Tongji Univ, Coll Civil Engn, Dept Struct Engn, Shanghai 200092, Peoples R China
[2] Tongji Univ, Minist Educ, Key Lab Performance Evolut & Control Engn Struct, Shanghai 200092, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2021年 / 273卷 / 273期
基金：
中国国家自然科学基金;
关键词：
3D concrete printing; Recycled sand; Sodium gluconate; Printability; Green strength;
D O I：
10.1016/j.conbuildmat.2020.121699
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Currently, 3D concrete printing attracts worldwide attention due to its digital-construction advantages, meanwhile, the problems of pollution caused by construction and demolition waste as well as the shortage of river sand become more and more serious. Based on it, this research tries to verify the printability of 3D printing mortar with 100% recycled sand by assessing its fluidity, extrudability, printability window, and green strength. Result shows that, when additional and suitable sodium gluconate is added into the printing mortar with 100% recycled sand, this mortar can not only meet the printability requirements of 3D printing, but also obtain a longer printability window and a higher green strength than the mortar with 100% natural sand, which is beneficial for the practical application of 3D concrete printing. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：6
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