High strength cementitious materials are usually prepared using iron ore tailings by step-milling method. For optimal stepmilling, this paper studies its effect on mechanical properties of the high strength structural materials based on uniform design. Stepwise regression analysis in SPSS software was used to establish the regression equation, which takes the strength of concrete as the objective function, and the optimum milled program for preparation of the high strength structural materials was obtained by the optimization technology in the Matlab software. The result of the experiment shows that the high strength structural material was successfully prepared when the milling time of each stage in the step-milling was set to be 21, 67 and 57 min and the specific surface areas were 285, 485and 550 m2/kg. Its compressive strength reached 75.28 MPa. The optimization of the step-milling method shows that the micro-ball effects play an important role in preparation of the cementitious materials.
WU Hui
,
NI Wen
,
TANG Chang
,
CHEN Xingjie
,
QIU Xiajie
. Preparation of High Strength Structural Materials Using Iron Ore Tailings Based on Uniform Design[J]. Science & Technology Review, 2014
, 32(11)
: 38
-42
.
DOI: 10.3981/j.issn.1000-7857.2014.11.005
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