Effect of nanoparticles on foaming agent and the foamed concrete

被引:87
作者
Hou, Li [1 ,2 ]
Li, Jun [1 ,2 ]
Lu, Zhongyuan [1 ]
Niu, Yunhui [1 ,2 ]
Jiang, Jun [1 ,2 ]
Li, Taozhu [2 ]
机构
[1] Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China
[2] Southwest Univ Sci & Technol, Sch Mat Sci & Engn, Mianyang 621010, Sichuan, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
Nanoparticles; Foaming agent; Prefabricated foams; Stability; Foamed concrete; PORE-SIZE DISTRIBUTION; POROSITY CEMENT FOAMS; AIR-VOID SYSTEM; THERMAL-CONDUCTIVITY; FROST-RESISTANCE; DRYING SHRINKAGE; NANO-SILICA; ASH CONTENT; FLY-ASH; STRENGTH;
D O I
10.1016/j.conbuildmat.2019.116698
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Nanoparticles are expected to improve properties of foaming agents and that prefabricated foams, further the performances of foamed concrete. In this study, foaming agents were prepared by introducing a certain content of nano-SiO2 (NS) and graphene (G), respectively. Effect of nanoparticles on foaming agent and that prefabricated foams has been investigated. Stability of prefabricated foams could be improved with the addition of NS, which might be attributed to the increased viscosity and a few changes in surface tension of foaming agents with NS. However, stability of the prefabricated foams would be degraded with the addition of G due to the obvious increase in surface tension of foaming agent with G. Furthermore, prefabricated foams through foaming agents with nanoparticles were used to prepare foamed concrete at dry density level of 500 kg/m(3). Foamed concretes with decreased and evenly distributed pore sizes were obtained when foaming agents with NS were used, which is related to the much higher stability of prefabricated foams. Proper content of nanoparticles in foaming agents and the prefabricated foams can improve the mechanical properties of as-prepared foamed concrete. However, improvements for other performance of foamed concrete, such as thermal conductivity, water absorption and shrinkage, were not obvious when foaming agent with nanoparticles were used. (C) 2019 Elsevier Ltd. All rights reserved.
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页数:10
相关论文
共 49 条
[1]  
[Anonymous], 2013, 21992013 JCT
[2]  
[Anonymous], 2011, 2662011 JCT
[3]   ASPECTS OF AQUEOUS FOAM STABILITY IN THE PRESENCE OF HYDROCARBON OILS AND SOLID PARTICLES [J].
AVEYARD, R ;
BINKS, BP ;
FLETCHER, PDI ;
PECK, TG ;
RUTHERFORD, CE .
ADVANCES IN COLLOID AND INTERFACE SCIENCE, 1994, 48 :93-120
[4]   Superior thermal conductivity of single-layer graphene [J].
Balandin, Alexander A. ;
Ghosh, Suchismita ;
Bao, Wenzhong ;
Calizo, Irene ;
Teweldebrhan, Desalegne ;
Miao, Feng ;
Lau, Chun Ning .
NANO LETTERS, 2008, 8 (03) :902-907
[5]   The effects of nano-silica and nano-alumina on frost resistance of normal concrete [J].
Behfarnia, Kiachehr ;
Salemi, Niloofar .
CONSTRUCTION AND BUILDING MATERIALS, 2013, 48 :580-584
[6]   Aqueous foams stabilized solely by silica nanoparticles [J].
Binks, BP ;
Horozov, TS .
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (24) :3722-3725
[7]   Particles as surfactants - similarities and differences [J].
Binks, BP .
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 2002, 7 (1-2) :21-41
[8]   Cellular concrete review: New trends for application in construction [J].
Chica, Lina ;
Alzate, Albert .
CONSTRUCTION AND BUILDING MATERIALS, 2019, 200 :637-647
[9]   Properties of a foamed concrete with soil as filler [J].
Cong, Ma ;
Bing, Chen .
CONSTRUCTION AND BUILDING MATERIALS, 2015, 76 :61-69
[10]   Durability performances of concrete with nano-silica [J].
Du, Hongjian ;
Du, Suhuan ;
Liu, Xuemei .
CONSTRUCTION AND BUILDING MATERIALS, 2014, 73 :705-712