Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Early-strength cold-resistant concrete material and preparation method thereof
The invention relates to the technical field of concrete, in particular to an early-strength cold-resistant concrete material and a preparation method thereof. A silane coupling agent is used for carrying out charge modification on a composite material of polydopamine-coated boron nitride nanosheets, silicon dioxide and ferric oxide, and the concrete modified filler is obtained through electrostatic interaction self-assembly. The modified filler is good in dispersity and can achieve the effects of reinforcing concrete and preventing cracking. The nano silicon dioxide on the surface layer of the composite material can be subjected to secondary hydration reaction with calcium hydroxide generated by cement hydration, so that the concentration of surrounding calcium ions is reduced, and the dispersity of boron nitride is further improved; after the silicon dioxide on the surface layer is reduced along with the secondary hydration reaction, the internal nano iron oxide can adsorb hydration products around to form a new columnar network, so that the compactness of the concrete is improved, and the strength and toughness of the concrete are further improved.
本发明涉及混凝土技术领域，具体为一种早强耐寒的混凝土材料及其制备方法。本发明利用硅烷偶联剂对聚多巴胺包裹氮化硼纳米片、二氧化硅和氧化铁的复合材料进行电荷改性，并通过静电作用自组装得到混凝土改性填料。改性填料分散性良好，能够起到混凝土补强、防裂的效果。复合材料表层的纳米二氧化硅能与水泥水化生成的氢氧化钙进行二次水化反应，导致周围钙离子浓度下降，进一步提高氮化硼的分散性；表层二氧化硅随着二次水化反应减少后，内部的纳米氧化铁可以将水化产物吸附在周围形成新的柱状网络，从而提高混凝土的密实度，进一步改善混凝土的强度和韧性。
Early-strength cold-resistant concrete material and preparation method thereof
The invention relates to the technical field of concrete, in particular to an early-strength cold-resistant concrete material and a preparation method thereof. A silane coupling agent is used for carrying out charge modification on a composite material of polydopamine-coated boron nitride nanosheets, silicon dioxide and ferric oxide, and the concrete modified filler is obtained through electrostatic interaction self-assembly. The modified filler is good in dispersity and can achieve the effects of reinforcing concrete and preventing cracking. The nano silicon dioxide on the surface layer of the composite material can be subjected to secondary hydration reaction with calcium hydroxide generated by cement hydration, so that the concentration of surrounding calcium ions is reduced, and the dispersity of boron nitride is further improved; after the silicon dioxide on the surface layer is reduced along with the secondary hydration reaction, the internal nano iron oxide can adsorb hydration products around to form a new columnar network, so that the compactness of the concrete is improved, and the strength and toughness of the concrete are further improved.
本发明涉及混凝土技术领域，具体为一种早强耐寒的混凝土材料及其制备方法。本发明利用硅烷偶联剂对聚多巴胺包裹氮化硼纳米片、二氧化硅和氧化铁的复合材料进行电荷改性，并通过静电作用自组装得到混凝土改性填料。改性填料分散性良好，能够起到混凝土补强、防裂的效果。复合材料表层的纳米二氧化硅能与水泥水化生成的氢氧化钙进行二次水化反应，导致周围钙离子浓度下降，进一步提高氮化硼的分散性；表层二氧化硅随着二次水化反应减少后，内部的纳米氧化铁可以将水化产物吸附在周围形成新的柱状网络，从而提高混凝土的密实度，进一步改善混凝土的强度和韧性。
Early-strength cold-resistant concrete material and preparation method thereof
一种早强耐寒的混凝土材料及其制备方法
WANG KEKE (Autor:in) / WU XIANG (Autor:in) / FAN XIAOXIAO (Autor:in)
14.07.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
High-strength corrosion-resistant concrete material and preparation method thereof
| Europäisches Patentamt | 2020
Cold-resistant concrete and preparation method thereof
| Europäisches Patentamt | 2021
Cold-resistant concrete and preparation method thereof
| Europäisches Patentamt | 2015
Early-strength asphalt cold patch material and preparation method thereof
| Europäisches Patentamt | 2021
Early-strength ultrahigh-ductility geopolymer concrete material and preparation method thereof
| Europäisches Patentamt | 2021