Creep of cement paste containing fly ash - An investigation using microindentation technique

被引：18
作者：
Mallick, Shatabdi [1 ]
Anoop, M. B. [2 ]
Rao, K. Balaji [2 ]
机构：
[1] CSIR, Engn Struct, AcSIR, Struct Engn Res Ctr, Chennai 600113, Tamil Nadu, India
[2] CSIR, Struct Engn Res Ctr, Chennai 600113, Tamil Nadu, India
来源：
CEMENT AND CONCRETE RESEARCH | 2019年 / 121卷
关键词：
Creep; Microindentation; Cement paste; Fly ash; Water-binder ratio; C-S-H; EARLY-AGE; CONCRETE CREEP; TERM CREEP; NANOINDENTATION; SHRINKAGE; STRENGTH; MODULUS; MICRO; RELAXATION;
D O I：
10.1016/j.cemconres.2019.04.006
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Grid-microindentation tests were conducted to study the effect of fly ash content, water-binder ratio and capillary water on creep of cement paste. Cement paste specimens containing 0%, 20% and 40% fly ash (by weight of binder) were tested at 1, 3, 7, 28 and 90 days. It is found that the effect of fly ash content on creep depends on the age at loading. It is also noted that for a given loading age, the creep deformations increase with increase in water-binder ratio. Presence of capillary water is found to have an influence on creep of cement-fly ash paste system. Logarithmic fit for creep deformation, while overestimating the experimental values in the early stages, is in good agreement at later stages.
引用
收藏
页码：21 / 36
页数：16
相关论文
共 72 条
[1]  
Aligizaki K.K., 2006, Pore structure of cement-based materials: testing, interpretation and requirement
[2]  
[Anonymous], 2005, C61805 ASTM INT
[3]  
[Anonymous], 2013, JCSS PROB MOD COD
[4]  
[Anonymous], WARMEDEHNUNG E MODUL
[5]  
Bazant ZP, 2018, SOLID MECH APPL, V225, DOI 10.1007/978-94-024-1138-6
[6]  
Bazant ZP, 2011, ACI STRUCT J, V108, P766
[7]  
Bazant ZP, 1997, J ENG MECH-ASCE, V123, P1188
[8]   Prediction of concrete creep and shrinkage: past, present and future [J].
Bazant, ZP .
NUCLEAR ENGINEERING AND DESIGN, 2001, 203 (01) :27-38
[9]  
Bhaskara G. S. Vijaya, 2017, MAGAZINE CONCRETE RE, V70, P1
[10]   30-year creep and shrinkage of concrete [J].
Brooks, JJ .
MAGAZINE OF CONCRETE RESEARCH, 2005, 57 (09) :545-556
12345678