Measurement of Pozzolanic Activity Index of Scoria, Pumice, and Rice Husk Ash as Potential Supplementary Cementitious Materials for Portland Cement

Table 4

The influence of materials, temperature, and chemical composition on initial setting times, final setting times, shrinkage, and soundness.

Independent variable	Pillai trace	Approx.	Num DF	Den DF	value
Materials	0.33431	6.4029	4	51
Temperature	0.13917	2.0613	4	51	0.0996102
Fineness	0.26691	4.6422	4	51
Basic oxides	0.13841	2.0483	4	51	0.1014302
Replacement	0.11097	1.5915	4	51	0.1907633

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