Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Recycled concrete and preparation method thereof
The invention relates to the technical field of concrete, and particularly discloses recycled concrete and a preparation method thereof. The recycled concrete comprises the following raw materials: Portland cement, fly ash, recycled coarse aggregate, recycled fine aggregate, water and a water reducing agent, wherein the recycled coarse aggregate and the recycled fine aggregate are prepared according to a method including the steps of (1) crushing waste concrete to obtain waste concrete particles; (2) screening the waste concrete particles to obtain regenerated coarse particles and regenerated micro powder; (3) mixing the regenerated coarse particles with a modified liquid, standing for 6-8 hours, filtering, and screening obtained filter residues to obtain regenerated coarse aggregate; and (4) mixing the regenerated micro powder with natural sand, grinding, and screening to obtain the regenerated fine aggregate. According to the invention, the modification liquid reduces the porosity of the recycled coarse aggregate, the adhesion degree of the recycled coarse aggregate and cement paste is enhanced, and the strength of the recycled concrete can be improved.
本申请涉及混凝土技术领域，具体公开了一种再生混凝土及其制备方法。再生混凝土的原料包括硅酸盐水泥、粉煤灰、再生粗骨料、再生细骨料、水以及减水剂。其中，再生粗骨料和再生细骨料按照如下方法制备：（1）将废弃混凝土破碎，得到废弃混凝土颗粒；（2）对废弃混凝土颗粒进行筛分，得到再生粗颗粒和再生微粉；（3）将再生粗颗粒与改性液混合，静置6‑8h后进行过滤，并筛选所得滤渣，得到再生粗骨料；（4）将再生微粉与天然砂混合后进行研磨，然后进行筛选，得到再生细骨料。本申请的改性液降低了再生粗骨料的孔隙率，并且增强了再生粗骨料与水泥浆体的粘合度，有助于提高再生混凝土的强度。
Recycled concrete and preparation method thereof
The invention relates to the technical field of concrete, and particularly discloses recycled concrete and a preparation method thereof. The recycled concrete comprises the following raw materials: Portland cement, fly ash, recycled coarse aggregate, recycled fine aggregate, water and a water reducing agent, wherein the recycled coarse aggregate and the recycled fine aggregate are prepared according to a method including the steps of (1) crushing waste concrete to obtain waste concrete particles; (2) screening the waste concrete particles to obtain regenerated coarse particles and regenerated micro powder; (3) mixing the regenerated coarse particles with a modified liquid, standing for 6-8 hours, filtering, and screening obtained filter residues to obtain regenerated coarse aggregate; and (4) mixing the regenerated micro powder with natural sand, grinding, and screening to obtain the regenerated fine aggregate. According to the invention, the modification liquid reduces the porosity of the recycled coarse aggregate, the adhesion degree of the recycled coarse aggregate and cement paste is enhanced, and the strength of the recycled concrete can be improved.
本申请涉及混凝土技术领域，具体公开了一种再生混凝土及其制备方法。再生混凝土的原料包括硅酸盐水泥、粉煤灰、再生粗骨料、再生细骨料、水以及减水剂。其中，再生粗骨料和再生细骨料按照如下方法制备：（1）将废弃混凝土破碎，得到废弃混凝土颗粒；（2）对废弃混凝土颗粒进行筛分，得到再生粗颗粒和再生微粉；（3）将再生粗颗粒与改性液混合，静置6‑8h后进行过滤，并筛选所得滤渣，得到再生粗骨料；（4）将再生微粉与天然砂混合后进行研磨，然后进行筛选，得到再生细骨料。本申请的改性液降低了再生粗骨料的孔隙率，并且增强了再生粗骨料与水泥浆体的粘合度，有助于提高再生混凝土的强度。
Recycled concrete and preparation method thereof
一种再生混凝土及其制备方法
WU JIAJIAN (Autor:in) / MO XIANFENG (Autor:in) / CHEN ZHUOWEN (Autor:in) / CEN ZHONGZHI (Autor:in) / TAN BINGYE (Autor:in) / LIANG QIBEI (Autor:in) / HU GUOHUA (Autor:in)
14.01.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Recycled concrete, recycled concrete prefabricated part and preparation method thereof
| Europäisches Patentamt | 2021