A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Recycled concrete capable of being repeatedly utilized in cold regions and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to recycled concrete capable of being repeatedly utilized in cold regions and a preparation method, the recycled concrete comprises the following components in parts by weight: 860-912 parts of recycled coarse aggregate, 692-736 parts of river sand, 286-312 parts of Portland cement, 22-24 parts of silica fume, 88-96 parts of fly ash, 44-48 parts of slag, 2.2-2.4 parts of a water reducing agent, 0.26-0.29 part of an air entraining agent and 169-182 parts of water. The recycled concrete capable of being repeatedly utilized in the cold regions provided by the invention has the advantages of high strength and good anti-freezing property, and the second-generation recycled coarse aggregate obtained from the waste recycled concrete after being crushed, frozen and thawed 300 times meets the physical property requirements of the third-class recycled coarse aggregate and can be applied to structural concrete again; second-generation recycled concrete prepared from the concrete also has excellent mechanical and anti-freezing properties, so that the recycled concrete can be used for multiple times, and meanwhile, the problem that waste recycled concrete in cold regions pollutes the environment is solved.
本发明属于建筑材料技术领域，具体涉及一种可在寒冷地区多次利用的再生混凝土及制备方法，该再生混凝土包括以下重量份的组分：再生粗骨料860~912份，河砂692~736份，硅酸盐水泥286~312份，硅灰22~24份，粉煤灰88~96份，矿渣44~48份，减水剂2.2~2.4份，引气剂0.26~0.29份和水169~182份。本发明提供的可在寒冷地区多次利用的再生混凝土具有强度高、抗冻性能好的优点，破碎冻融300次后的废弃再生混凝土得到的第二代再生粗骨料满足第Ⅲ类再生粗骨料物理性能要求，可以再次应用于结构混凝土，使用其制备的第二代再生混凝土同样具备优良的力学与抗冻性能，使得再生混凝土能够多次利用，同时解决了寒冷地区废弃再生混凝土污染环境的问题。
Recycled concrete capable of being repeatedly utilized in cold regions and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to recycled concrete capable of being repeatedly utilized in cold regions and a preparation method, the recycled concrete comprises the following components in parts by weight: 860-912 parts of recycled coarse aggregate, 692-736 parts of river sand, 286-312 parts of Portland cement, 22-24 parts of silica fume, 88-96 parts of fly ash, 44-48 parts of slag, 2.2-2.4 parts of a water reducing agent, 0.26-0.29 part of an air entraining agent and 169-182 parts of water. The recycled concrete capable of being repeatedly utilized in the cold regions provided by the invention has the advantages of high strength and good anti-freezing property, and the second-generation recycled coarse aggregate obtained from the waste recycled concrete after being crushed, frozen and thawed 300 times meets the physical property requirements of the third-class recycled coarse aggregate and can be applied to structural concrete again; second-generation recycled concrete prepared from the concrete also has excellent mechanical and anti-freezing properties, so that the recycled concrete can be used for multiple times, and meanwhile, the problem that waste recycled concrete in cold regions pollutes the environment is solved.
本发明属于建筑材料技术领域，具体涉及一种可在寒冷地区多次利用的再生混凝土及制备方法，该再生混凝土包括以下重量份的组分：再生粗骨料860~912份，河砂692~736份，硅酸盐水泥286~312份，硅灰22~24份，粉煤灰88~96份，矿渣44~48份，减水剂2.2~2.4份，引气剂0.26~0.29份和水169~182份。本发明提供的可在寒冷地区多次利用的再生混凝土具有强度高、抗冻性能好的优点，破碎冻融300次后的废弃再生混凝土得到的第二代再生粗骨料满足第Ⅲ类再生粗骨料物理性能要求，可以再次应用于结构混凝土，使用其制备的第二代再生混凝土同样具备优良的力学与抗冻性能，使得再生混凝土能够多次利用，同时解决了寒冷地区废弃再生混凝土污染环境的问题。
Recycled concrete capable of being repeatedly utilized in cold regions and preparation method thereof
一种可在寒冷地区多次利用的再生混凝土及制备方法
ZHU PINGHUA (author) / WEI DA (author) / WANG XINJIE (author) / CHEN CHUNHONG (author) / LIU HUI (author)
2022-01-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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