Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Anti-freezing and anti-cracking recycled aggregate and preparation method thereof
The invention relates to the field of preparation of recycled aggregates, and particularly discloses a preparation method of an anti-freezing and anti-cracking recycled aggregate, which is characterized by comprising the following steps: S1, crushing and sieving waste concrete to obtain the recycled aggregate with the particle size of 5-30 mm; s2, the recycled aggregate is soaked in the nano silicon dioxide dispersion liquid for 4-6 h, and the recycled aggregate is fished out and aired; s3, a reinforcing agent is added, stirring is conducted for 12-24 h under the pressurization condition, the adding amount of the reinforcing agent is 10-20% of the mass of the recycled aggregate, and the reinforcing agent comprises kaolin, cement, reinforcing fibers, fly ash, expansive soil and water; and S4, airing the recycled aggregate obtained in the step S3 for at least 7 days to obtain the anti-freezing and anti-cracking recycled aggregate. The nano silicon dioxide dispersion liquid and the reinforcing agent have a synergistic effect, so that the strength and the anti-freezing property of the recycled aggregate are better improved, and the strength and the anti-freezing property of the concrete are improved.
本申请涉及再生骨料制备的领域，具体公开了一种抗冻抗开裂的再生骨料的制备方法，其特征在于，包括如下步骤：S1，将废弃混凝土经过破碎、过筛，得再生骨料，再生骨料的粒径为5‑30mm；S2，将再生骨料浸泡纳米二氧化硅分散液4‑6h，捞出晾干；S3，加入加强剂，加压条件下搅拌12‑24h，加强剂的添加量是再生骨料的质量的10‑20％，加强剂包括如下组分：高岭土、水泥、加强纤维、粉煤灰、膨胀土和水；S4，将S3步骤后得到的再生骨料晾干至少7d，得到抗冻抗开裂的再生骨料。纳米二氧化硅分散液和加强剂协同作用，较好的提高再生骨料的强度和抗冻性能，从而提高混凝土的强度和抗冻性能。
Anti-freezing and anti-cracking recycled aggregate and preparation method thereof
The invention relates to the field of preparation of recycled aggregates, and particularly discloses a preparation method of an anti-freezing and anti-cracking recycled aggregate, which is characterized by comprising the following steps: S1, crushing and sieving waste concrete to obtain the recycled aggregate with the particle size of 5-30 mm; s2, the recycled aggregate is soaked in the nano silicon dioxide dispersion liquid for 4-6 h, and the recycled aggregate is fished out and aired; s3, a reinforcing agent is added, stirring is conducted for 12-24 h under the pressurization condition, the adding amount of the reinforcing agent is 10-20% of the mass of the recycled aggregate, and the reinforcing agent comprises kaolin, cement, reinforcing fibers, fly ash, expansive soil and water; and S4, airing the recycled aggregate obtained in the step S3 for at least 7 days to obtain the anti-freezing and anti-cracking recycled aggregate. The nano silicon dioxide dispersion liquid and the reinforcing agent have a synergistic effect, so that the strength and the anti-freezing property of the recycled aggregate are better improved, and the strength and the anti-freezing property of the concrete are improved.
本申请涉及再生骨料制备的领域，具体公开了一种抗冻抗开裂的再生骨料的制备方法，其特征在于，包括如下步骤：S1，将废弃混凝土经过破碎、过筛，得再生骨料，再生骨料的粒径为5‑30mm；S2，将再生骨料浸泡纳米二氧化硅分散液4‑6h，捞出晾干；S3，加入加强剂，加压条件下搅拌12‑24h，加强剂的添加量是再生骨料的质量的10‑20％，加强剂包括如下组分：高岭土、水泥、加强纤维、粉煤灰、膨胀土和水；S4，将S3步骤后得到的再生骨料晾干至少7d，得到抗冻抗开裂的再生骨料。纳米二氧化硅分散液和加强剂协同作用，较好的提高再生骨料的强度和抗冻性能，从而提高混凝土的强度和抗冻性能。
Anti-freezing and anti-cracking recycled aggregate and preparation method thereof
一种抗冻抗开裂的再生骨料及其制备方法
ZENG ZHIYONG (Autor:in) / ZHANG JIYONG (Autor:in)
17.05.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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