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Frontiers of Structural and Civil Engineering

Front. Struct. Civ. Eng.    2018, Vol. 12 Issue (1) : 58-66     https://doi.org/10.1007/s11709-017-0383-0
RESEARCH ARTICLE |
Properties of cement grout modified with ultra-fine slag
Sowmini GOPINATHAN, K B ANAND()
Department of Civil Engineering, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, Amrita University, Pin code 641 112, India
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Abstract

The purpose of the study is to obtain a cement grout with improved performance. The grout mixes of the present study contain cement, ultra-fine slag (UFS), super plasticizer and water. Properties like flowability, bleeding, compressive strength and shrinkage of cement grouts have been studied. Rheological parameters were also studied in order to explain the grout workability. The results show that, cement replacement with slag in grouts could reduce bleeding substantially without affecting the workability of the mixes. Introduction of slag enhanced the compressive strength and reduced shrinkage reasonably. Ultra-fine slag can be used as a supplementary cementitious material in cementitious grouts in order to improve the grout behavior.

Keywords cement grout      ultra-fine slag      flowability      bleeding      viscosity     
Corresponding Authors: K B ANAND   
Online First Date: 19 April 2017    Issue Date: 08 March 2018
 Cite this article:   
Sowmini GOPINATHAN,K B ANAND. Properties of cement grout modified with ultra-fine slag[J]. Front. Struct. Civ. Eng., 2018, 12(1): 58-66.
 URL:  
http://journal.hep.com.cn/fsce/EN/10.1007/s11709-017-0383-0
http://journal.hep.com.cn/fsce/EN/Y2018/V12/I1/58
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Sowmini GOPINATHAN
K B ANAND
chemical (%)physical
calcium oxide, CaO30-34bulk density600-700 kg/m3
aluminum oxide, Al2O318-25surface area12000 cm2/gm
silicon dioxide, SiO230-36average particle size4-6 microns
iron oxide, Fe2O30.8-3.0
magnesium oxide, MgO6-10
Tab.1  Chemical and physical properties of UFS*
SNF0.40.60.81.01.2
PCE0.60.851.11.351.6
Tab.2  SP dosages for the grout mixes
Fig.1  Details of mini slump test cone
Fig.2  Effect of UFS proportions on spread diameter of SNF based grouts
Fig.3  Effect of UFS proportions on spread diameter of PCE based grouts
Fig.4  Brookfield coaxial cylinder viscometer
Fig.5  Influence of OPC replacement with UFS on yield stress and average spread
Fig.6  Marsh cone test
Fig.7  Effect of OPC replacement with UFS on flow time of SNF based grouts
Fig.8  Effect of OPC replacement with UFS on flow time of PCE based grouts
Fig.9  Influence of OPC replacement with UFS on plastic viscosity and flow time
Fig.10  Effect of OPC replacement with UFS on bleeding in SNF based grouts
Fig.11  Effect of OPC replacement with UFS on bleeding in PCE based grouts
grout designationgrout composition detailscompressive strength, MPa (28day)
w/cSP%UFS%
SNF00.350.4039.4
SNF10.350.6548.9
SNF20.350.81041.3
SNF30.40.4540.0
SNF40.40.61041.9
PCE00.30.6041.2
PCE10.30.6543.0
PCE20.30.61051.8
PCE30.30.61553.1
Tab.3  Satisfactory grout mixes and their strength
Fig.12  Shrinkage of SNF based grout mixes
Fig.13  Shrinkage of PCE based grout mixes
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