High-performance man-made silicate aggregate was prepared with hydrothermal method by using industrial solid wastes, which can be used to replace natural aggregate. The obtained silicate aggregate was spherical with the bulk density of 859 kg/m3 and the maximum cylinder compressive strength of 20.65 MPa. The concrete was prepared using the silicate aggregate, accounting for 50% of the total amount in volume. The compressive strength of the concrete reached 52.26-68.71 MPa, and the apparent density was 1881-1949 kg/m3. Comparison of the concrete with silicate aggregate and common concrete with the same volume of aggregate and cement mortar shows that the compressive strengths of the two kinds of concrete were close, but the density of the former was 20% lower than that of the latter. The fracture morphology of the concrete shows that the interface structure of the silicate aggregate concrete is better than that of common concrete.
YANG Xiuli
,
CUI Chong
,
CUI Xiaoyu
,
JIA Jianping
,
ZHU Zhiping
. Properties of Man-made Silicate Aggregate and the Lightweight Concrete[J]. Science & Technology Review, 2014
, 32(23)
: 50
-54
.
DOI: 10.3981/j.issn.1000-7857.2014.23.007
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