Compressive strength and chloride resistance of self-compacting concrete containing high level fly ash and silica fume

Abstract The influence of high-calcium fly ash and silica fume as a binary and ternary blended cement on compressive strength and chloride resistance of self-compacting concrete (SCC) were investigated in this study. High-calcium fly ash (40–70%) and silica fume (0–10%) were used to replace part of cement at 50, 60 and 70 wt.%. Compressive strength, density, volume of permeable pore space (voids) and water absorption of SCC were investigated. The total charge passed in coulombs was assessed in order to determine chloride resistance of SCC. The results show that binary blended cement with high level fly ash generally reduced the compressive strength of SCC at all test ages (3, 7, 28 and 90 days). However, ternary blended cement with fly ash and silica fume gained higher compressive strength after 7 days when compared to binary blended fly ash cement at the same replacement level. The compressive strength more than 60 MPa (high strength concrete) can be obtained when using high-calcium fly ash and silica fume as ternary blended cement. Fly ash decreased the charge passed of SCC and tends to decrease with increasing fly ash content, although the volume of permeable pore space (voids) and water absorption of SCC were increased. In addition when compared to binary blended cement at the same replacement level, the charge passed of SCC that containing ternary blended cement was lower than binary blended cement with fly ash only. This indicated that fly ash and silica fume can improve chloride resistance of SCC at high volume content of Portland cement replacement.

[1]  Dale P. Bentz,et al.  Evaluation of Sustainable High-Volume Fly Ash Concretes | NIST , 2011 .

[2]  Halit Yazici,et al.  Mechanical properties of reactive powder concrete containing mineral admixtures under different curing regimes , 2009 .

[3]  P. K. Mehta,et al.  Concrete: Microstructure, Properties, and Materials , 2005 .

[4]  R. Siddique.  Properties of self-compacting concrete containing class F fly ash , 2011 .

[5]  Min-hong Zhang,et al.  Mechanical properties and durability of concrete made with high-volume fly ash blended cements using a coarse fly ash , 2001 .

[6]  J. Jawahar,et al.  Micro and macrolevel properties of fly ash blended self compacting concrete , 2013 .

[7]  Ran Huang,et al.  Establishment of the durability indices for cement-based composite containing supplementary cementitious materials , 2012 .

[8]  Hjh Jos Brouwers,et al.  Chloride binding related to hydration products , 2012 .

[9]  Wichian Chalee,et al.  Effect of W/C ratio on covering depth of fly ash concrete in marine environment , 2007 .

[10]  A. Neville.  Properties of Concrete , 1968 .

[11]  S. Kosmatka,et al.  Design and Control of Concrete Mixtures , 2002 .

[12]  P. Dinakar,et al.  Behaviour of self compacting concrete using Portland pozzolana cement with different levels of fly ash , 2013 .

[13]  J. Jawahar,et al.  Design of cost-effective M 25 grade of self compacting concrete , 2013 .

[14]  Amarnath Yerramala,et al.  Transport properties of high volume fly ash roller compacted concrete , 2011 .

[15]  Mark G. Richardson,et al.  Fundamentals of Durable Reinforced Concrete , 2002 .

[16]  Miao Liu,et al.  Self-compacting concrete with different levels of pulverized fuel ash , 2010 .

[17]  A. Chaipanich,et al.  Compressive strength and drying shrinkage of fly ash-bottom ash-silica fume multi-blended cement mortars , 2012 .

[18]  Halit Yazici,et al.  The effect of silica fume and high-volume Class C fly ash on mechanical properties, chloride penetration and freeze–thaw resistance of self-compacting concrete , 2008 .

[19]  M. Lachemi,et al.  Self-compacting concrete incorporating high volumes of class F fly ash: Preliminary results , 2001 .

[20]  Manu Santhanam,et al.  Durability properties of high volume fly ash self compacting concretes , 2008 .

[21]  Mucteba Uysal,et al.  Durability performance of concrete incorporating Class F and Class C fly ashes , 2012 .

[22]  A. Scott,et al.  The effect of supplementary cementitious materials on chloride binding in hardened cement paste , 2012 .

[23]  C. Atiş.  Strength Properties of High-Volume Fly Ash Roller Compacted and Workable Concrete, and Influence of Curing Condition , 2005 .