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High-magnesium waste stone dust-based composite mineral admixture, and applications thereof in low-strength concrete
The invention discloses a high-magnesium waste stone dust-based composite mineral admixture, and applications thereof in low-strength concrete. The high-magnesium waste stone dust-based composite mineral admixture is prepared via following steps: (1) high-magnesium waste stone, wet discharged fly ash, and manganese residue are dried until water content is lower than 1.0%; and (2) by weight, 70 to 85 parts of the dried high-magnesium waste stone, 10 to 20 parts of the dried wet discharged fly ash, and 0 to 10 parts of the dried manganese residue are mixed, and an obtained mixture is smashed into powder with a specific surface area ranging from 480 to 600m2/kg so as to obtain the high-magnesium waste stone dust-based composite mineral admixture. According to the high-magnesium waste stone dust-based composite mineral admixture, morphology effects and filling effects of high-magnesium waste stone powder are used so as to increase compactness of concrete mixtures, and increase fluidity of concrete; slump loss is less; less additives such as polycarboxylic acid are absorbed; concrete early-stage strength development is accelerated, and later-stage development is stabilized. And in addition, the high-magnesium waste stone dust-based composite mineral admixture can be applied to concrete together with high-magnesium waste stone coarse and fine aggregates so as to increase utilization ratio of high-magnesium waste stone greatly.
High-magnesium waste stone dust-based composite mineral admixture, and applications thereof in low-strength concrete
The invention discloses a high-magnesium waste stone dust-based composite mineral admixture, and applications thereof in low-strength concrete. The high-magnesium waste stone dust-based composite mineral admixture is prepared via following steps: (1) high-magnesium waste stone, wet discharged fly ash, and manganese residue are dried until water content is lower than 1.0%; and (2) by weight, 70 to 85 parts of the dried high-magnesium waste stone, 10 to 20 parts of the dried wet discharged fly ash, and 0 to 10 parts of the dried manganese residue are mixed, and an obtained mixture is smashed into powder with a specific surface area ranging from 480 to 600m2/kg so as to obtain the high-magnesium waste stone dust-based composite mineral admixture. According to the high-magnesium waste stone dust-based composite mineral admixture, morphology effects and filling effects of high-magnesium waste stone powder are used so as to increase compactness of concrete mixtures, and increase fluidity of concrete; slump loss is less; less additives such as polycarboxylic acid are absorbed; concrete early-stage strength development is accelerated, and later-stage development is stabilized. And in addition, the high-magnesium waste stone dust-based composite mineral admixture can be applied to concrete together with high-magnesium waste stone coarse and fine aggregates so as to increase utilization ratio of high-magnesium waste stone greatly.
High-magnesium waste stone dust-based composite mineral admixture, and applications thereof in low-strength concrete
CUI CHEN (author) / LI WEI (author) / ZENG RONG (author) / WANG GAOFENG (author) / TAN PENGFEI (author) / LIAO WUZHI (author) / TAN CONGQIN (author) / WU YOUWU (author) / LAO LILIN (author)
2015-09-16
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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