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High-corrosion-resistance low-shrinkage concrete and preparation method thereof
The invention discloses a preparation method of high-corrosion-resistance low-shrinkage concrete. The high-strength anti-erosion concrete is prepared from the following raw materials in parts by weight: 100 parts of cement, 40 to 150 parts of modified composite mineral ultrafine powder, 1 to 4 parts of layered double hydroxides, 0.2 to 1.5 parts of nano SiO2, 160 to 240 parts of medium-grade sand, 280 to 340 parts of 5 to 20mm continuous grading aggregate, 240 to 320 parts of water and 0.5 to 5 parts of functional efficient additives. The water, the cement, the composite mineral ultrafine powder, the medium-grade sand, the aggregate, the layered double hydroxide, the nano SiO2 and the functional efficient additive are sequentially added into a stirrer, uniformly stirred, molded and cured, and the high-corrosion-resistance low-shrinkage concrete can be prepared. Through detection, the 7d hydration heat of the high-corrosion-resistance low-shrinkage concrete is less than or equal to 220kJ/kg, the strength grade is greater than or equal to C45, the 56d electric flux is less than or equal to 850C, the 28d seawater corrosion resistance coefficient is greater than or equal to 1.12, and the 90d dry shrinkage rate is less than or equal to 350 * 10 <-6 >. The invention has the characteristics of low hydration heat, high strength, small shrinkage, good corrosion resistance and high utilization rate of metallurgical solid waste.
本发明公开一种高抗蚀低收缩混凝土的制备方法。所述高强度抗侵蚀混凝土由以下重量份原料组成：水泥100份，改性复合矿物超细粉40～150份，层状双氢氧化物1～4份，纳米SiO20.2～1.5份，中级砂160～240份，5～20mm连续级配骨料280～340份，水240～320份，功能性高效外加剂0.5～5份。将所述水，水泥，复合矿物超细粉，中级砂，骨料，层状双氢氧化物，纳米SiO2和功能性高效外加剂依次加入搅拌机，拌和均匀，成型养护后即可制备出高抗蚀低收缩混凝土。经检测：高抗蚀低收缩混凝土的7d水化热≤220kJ/kg，强度等级≥C45，56d电通量≤850C，28d抗海水侵蚀系数≥1.12，90d干缩率≤350×10‑6。本发明具有水化热低、强度高、收缩小、抗蚀性好和冶金固废利用率高的特点。
High-corrosion-resistance low-shrinkage concrete and preparation method thereof
The invention discloses a preparation method of high-corrosion-resistance low-shrinkage concrete. The high-strength anti-erosion concrete is prepared from the following raw materials in parts by weight: 100 parts of cement, 40 to 150 parts of modified composite mineral ultrafine powder, 1 to 4 parts of layered double hydroxides, 0.2 to 1.5 parts of nano SiO2, 160 to 240 parts of medium-grade sand, 280 to 340 parts of 5 to 20mm continuous grading aggregate, 240 to 320 parts of water and 0.5 to 5 parts of functional efficient additives. The water, the cement, the composite mineral ultrafine powder, the medium-grade sand, the aggregate, the layered double hydroxide, the nano SiO2 and the functional efficient additive are sequentially added into a stirrer, uniformly stirred, molded and cured, and the high-corrosion-resistance low-shrinkage concrete can be prepared. Through detection, the 7d hydration heat of the high-corrosion-resistance low-shrinkage concrete is less than or equal to 220kJ/kg, the strength grade is greater than or equal to C45, the 56d electric flux is less than or equal to 850C, the 28d seawater corrosion resistance coefficient is greater than or equal to 1.12, and the 90d dry shrinkage rate is less than or equal to 350 * 10 <-6 >. The invention has the characteristics of low hydration heat, high strength, small shrinkage, good corrosion resistance and high utilization rate of metallurgical solid waste.
本发明公开一种高抗蚀低收缩混凝土的制备方法。所述高强度抗侵蚀混凝土由以下重量份原料组成：水泥100份，改性复合矿物超细粉40～150份，层状双氢氧化物1～4份，纳米SiO20.2～1.5份，中级砂160～240份，5～20mm连续级配骨料280～340份，水240～320份，功能性高效外加剂0.5～5份。将所述水，水泥，复合矿物超细粉，中级砂，骨料，层状双氢氧化物，纳米SiO2和功能性高效外加剂依次加入搅拌机，拌和均匀，成型养护后即可制备出高抗蚀低收缩混凝土。经检测：高抗蚀低收缩混凝土的7d水化热≤220kJ/kg，强度等级≥C45，56d电通量≤850C，28d抗海水侵蚀系数≥1.12，90d干缩率≤350×10‑6。本发明具有水化热低、强度高、收缩小、抗蚀性好和冶金固废利用率高的特点。
High-corrosion-resistance low-shrinkage concrete and preparation method thereof
一种高抗蚀低收缩混凝土及其制备方法
HU CHENG (author) / CHEN PING (author) / XIANG WEIHENG (author) / LI SHUNKAI (author) / LIU RONGJIN (author) / ZHOU LIBO (author) / LIU MENG (author)
2022-03-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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