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A platform for research: civil engineering, architecture and urbanism
Recycled aggregate durable self-compacting concrete and preparation method thereof
The invention relates to the technical field of concrete, and particularly discloses recycled aggregate durable self-compacting concrete and a preparation method thereof.The recycled aggregate durable self-compacting concrete is prepared from Portland cement, fly ash, tailing ore powder, modified recycled fine aggregate, gravel, a fiber expanding agent, paraffin, a polycarboxylate superplasticizer and water; the modified recycled fine aggregate is obtained by coating and modifying waste concrete through sol. The self-compacting concrete obtained in the invention has relatively high mechanical properties, expansibility and segregation resistance. Meanwhile, the 28d impermeability grade of the obtained self-compacting concrete is P20, the lowest compressive strength loss rates are 19.2%, 5.0% and 11.8% respectively after the self-compacting concrete is oxidized and aged for 28d at-20 DEG C, 25 DEG C and 60 DEG C, and the durability of the self-compacting concrete is improved.
本申请涉及混凝土技术领域，具体公开了一种再生骨料耐久自密实混凝土及其制备方法，一种再生骨料耐久自密实混凝土，其包括如下原料：硅酸盐水泥，粉煤灰、尾矿石粉、改性再生细骨料、碎石、纤维膨胀剂、石蜡、聚羧酸减水剂和水；所述改性再生细骨料为废旧混凝土通过溶胶包覆改性而得。本申请得到的自密实混凝土具有较高力学性能、膨胀性和抗离析性。同时，所得到自密实混凝土28d抗渗等级为P20，在‑20℃、25℃和60℃氧化28d老化后抗压强度损失率最低分别为19.2%、5.0%和11.8%，提高了自密实混凝土耐久性。
Recycled aggregate durable self-compacting concrete and preparation method thereof
The invention relates to the technical field of concrete, and particularly discloses recycled aggregate durable self-compacting concrete and a preparation method thereof.The recycled aggregate durable self-compacting concrete is prepared from Portland cement, fly ash, tailing ore powder, modified recycled fine aggregate, gravel, a fiber expanding agent, paraffin, a polycarboxylate superplasticizer and water; the modified recycled fine aggregate is obtained by coating and modifying waste concrete through sol. The self-compacting concrete obtained in the invention has relatively high mechanical properties, expansibility and segregation resistance. Meanwhile, the 28d impermeability grade of the obtained self-compacting concrete is P20, the lowest compressive strength loss rates are 19.2%, 5.0% and 11.8% respectively after the self-compacting concrete is oxidized and aged for 28d at-20 DEG C, 25 DEG C and 60 DEG C, and the durability of the self-compacting concrete is improved.
本申请涉及混凝土技术领域，具体公开了一种再生骨料耐久自密实混凝土及其制备方法，一种再生骨料耐久自密实混凝土，其包括如下原料：硅酸盐水泥，粉煤灰、尾矿石粉、改性再生细骨料、碎石、纤维膨胀剂、石蜡、聚羧酸减水剂和水；所述改性再生细骨料为废旧混凝土通过溶胶包覆改性而得。本申请得到的自密实混凝土具有较高力学性能、膨胀性和抗离析性。同时，所得到自密实混凝土28d抗渗等级为P20，在‑20℃、25℃和60℃氧化28d老化后抗压强度损失率最低分别为19.2%、5.0%和11.8%，提高了自密实混凝土耐久性。
Recycled aggregate durable self-compacting concrete and preparation method thereof
一种再生骨料耐久自密实混凝土及其制备方法
LIU QUANXIN (author) / DU GUANGMING (author) / LI YINGXIN (author) / LIU HUI (author) / MA LEI (author) / WANG RONGHUA (author) / HAN HAOJIE (author) / YANG DONGLONG (author) / AN XIAOMING (author)
2023-08-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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