Mechanical properties of Self-Consolidating Concrete incorporating Cement Kiln Dust

Peer review under responsibility of Housing and Building National Research Center.

Figures & data

Fig. 1 Grain size distribution of fine aggregate.

Fig. 2 Grain size distribution of coarse aggregate.

Table 1 Chemical Composition of CKD and Cement.

Chemical compound	% of total weight
	CKD	Cement
Silicon dioxide, SiO2	13.50	23.00
Iron oxide, Fe2O3	2.50	1.70
Aluminum oxide, Al2O3	3.70	6.40
Calcium oxide, CaO	40.20	67.00
Magnesium oxide, MgO	1.14	4.10
Loss in ignition (LOI)	5.70	1.70

Table 2 Mixture proportions.

Mix	Cement (kg/m^3)	Water (kg/m^3)	Gravel (kg/m^3)	Sand (kg/m^3)	SP (kg/m^3)	CKD (kg/m^3)
NVC	400	180	1143	615	1.4	–
SCC-10	360	180	867	867	6.0	40
SCC-20	320	180	856	856	9.6	80
SCC-30	280	180	846	846	12.0	120
SCC-40	240	180	841	846	10.6	160

Table 3 Fresh Properties for NVC and SCC mixes.

Mix	Slump flow		l-box
	Diameter (mm)	T500 (s)	Passing ability ratio
NVC	80^a	–	–
SCC-10	665	4	0.80
SCC-20	670	4	0.79
SCC-30	645	4	0.82
SCC-40	655	4	0.85

a Conventional slump.

Fig. 3 Stress–strain curves at (a) 7 days, (b) 28 days, (c) 56 days, and (d) 91 days.

Fig. 4 Compressive strength against age.

Fig. 5 Modulus of elasticity at different ages.

Fig. 6 (a) Flexural strength, and (b) splitting tensile strength.

Fig. 7 Total shrinkage with age.