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A platform for research: civil engineering, architecture and urbanism
High-performance mineral admixture and application thereof in concrete
The invention relates to a high-performance mineral admixture and application thereof in concrete. The high-performance mineral admixture comprises the following components in percentage by mass: 75-85% of blast furnace slag, 5-15% of reconstructed converter steel slag and 5-15% of lithium slag. A preparation method of the reconstructed converter steel slag comprises the following steps: 1) mixing: adding a reducing agent and a hardening and tempering agent into hot converter steel slag, and carrying out uniform mixing; 2) blending: after uniform mixing, conveying the formed mixture into an electric furnace, starting to heat, continuously introducing protective gas into the electric furnace while heating, heating the electric furnace to 1400-1650 DEG C, keeping the temperature for 20-60 minutes, and cooling the electric furnace to 1200-1300 DEG C after the temperature maintenance is completed; 3) granulation: after the slag is discharged from the electric furnace, enabling molten slagto fall onto a rotating granulating wheel, and carrying out water quenching; 4) magnetic separation: recovering iron generated in the step 3); and 5) grinding: grinding the steel slag having undergoneiron removal treatment in the step 4). According to the invention, the activity of the converter steel slag is improved, so the overall activity of the mineral admixture is improved, and therefore, the compactness and strength of the concrete are improved.
本发明涉及一种高性能矿物掺合料及其在混凝土中的应用，按照质量百分比计，包括高炉矿渣75～85%、重构转炉钢渣5～15%以及锂矿渣5～15%，重构转炉钢渣的制备方法为：1）混料：热态的转炉钢渣中加入还原剂和调质剂混合均匀；2）调制：混合均匀后输送至电炉中开始升温，升温同时向电炉内持续通入保护气体，电炉升温至1400～1650℃后保温20～60min，保温结束后，电炉温度冷却至1200～1300℃；3）粒化：电炉出渣后，使熔渣落到旋转的粒化轮上，进行水淬；4）磁选：回收步骤3）产生的铁；5）粉磨：经过步骤4）除铁处理的钢渣进行粉磨。本发明通过提高转炉钢渣的活性，提高矿物掺合料整体的活性，从而提高混凝土的密实度和强度。
High-performance mineral admixture and application thereof in concrete
The invention relates to a high-performance mineral admixture and application thereof in concrete. The high-performance mineral admixture comprises the following components in percentage by mass: 75-85% of blast furnace slag, 5-15% of reconstructed converter steel slag and 5-15% of lithium slag. A preparation method of the reconstructed converter steel slag comprises the following steps: 1) mixing: adding a reducing agent and a hardening and tempering agent into hot converter steel slag, and carrying out uniform mixing; 2) blending: after uniform mixing, conveying the formed mixture into an electric furnace, starting to heat, continuously introducing protective gas into the electric furnace while heating, heating the electric furnace to 1400-1650 DEG C, keeping the temperature for 20-60 minutes, and cooling the electric furnace to 1200-1300 DEG C after the temperature maintenance is completed; 3) granulation: after the slag is discharged from the electric furnace, enabling molten slagto fall onto a rotating granulating wheel, and carrying out water quenching; 4) magnetic separation: recovering iron generated in the step 3); and 5) grinding: grinding the steel slag having undergoneiron removal treatment in the step 4). According to the invention, the activity of the converter steel slag is improved, so the overall activity of the mineral admixture is improved, and therefore, the compactness and strength of the concrete are improved.
本发明涉及一种高性能矿物掺合料及其在混凝土中的应用，按照质量百分比计，包括高炉矿渣75～85%、重构转炉钢渣5～15%以及锂矿渣5～15%，重构转炉钢渣的制备方法为：1）混料：热态的转炉钢渣中加入还原剂和调质剂混合均匀；2）调制：混合均匀后输送至电炉中开始升温，升温同时向电炉内持续通入保护气体，电炉升温至1400～1650℃后保温20～60min，保温结束后，电炉温度冷却至1200～1300℃；3）粒化：电炉出渣后，使熔渣落到旋转的粒化轮上，进行水淬；4）磁选：回收步骤3）产生的铁；5）粉磨：经过步骤4）除铁处理的钢渣进行粉磨。本发明通过提高转炉钢渣的活性，提高矿物掺合料整体的活性，从而提高混凝土的密实度和强度。
High-performance mineral admixture and application thereof in concrete
一种高性能矿物掺合料及其在混凝土中的应用
YAN JIANQIANG (author)
2020-04-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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