A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for enhancing concrete interface bonding force through graphene or graphene oxide and silica fume
The invention discloses a method for enhancing concrete interface bonding force by graphene or graphene oxide and silica fume, which comprises the following steps: firstly, chiseling an old concrete interface, then uniformly spraying a mixed dispersion liquid of G/GO and silica fume so as to form an old concrete pretreatment bonding surface, and finally, covering the pretreatment bonding surface with bonding mortar so as to form the graphene/graphene oxide/silica fume enhanced concrete interface bonding force. And the old concrete is tightly combined with the bonding mortar layer. According to the invention, the uniform dispersion liquid is prepared from the G/GO and the silica fume to pretreat a bonding interface, so that the problem of uneven dispersion caused by directly adding the G/GO into a cementing material is avoided, and the problems of dust pollution and aggregate dispersion in the transportation and use process of the silica fume are avoided. Generation of hydrated calcium silicate gel is attracted by means of G/GO, silica fume participates in secondary hydration of cement, and through the combined action of the G/GO and the silica fume, the compactness degree of a bonding interface is increased, and the bonding strength of the interface is improved. Meanwhile, the consumption of G/GO and silica fume is extremely low, the cost is low, the components are green and environment-friendly, and the operation is simple and easy to implement.
本发明公开了一种石墨烯或氧化石墨烯及硅灰增强混凝土界面粘接力的方法，首先对旧混凝土界面进行凿毛处理，然后均匀喷涂G/GO和硅灰的混合分散液，以此形成旧混凝土预处理粘接面，最后将粘接砂浆覆盖在此预处理粘接面，使旧混凝土与粘接砂浆层紧密结合。本发明通过将G/GO、硅灰制成均匀的分散液预处理粘接界面，规避了G/GO直接加入胶凝材料分散不均的问题，避免了硅灰运输使用过程中的粉尘污染及团聚体分散问题。借助G/GO吸引水化硅酸钙凝胶的生成，通过硅灰参与水泥二次水化，二者共同作用，增加粘接界面的致密程度，提高界面粘接强度。同时G/GO、硅灰用量极少，成本较低，成分绿色环保，操作简单易行。
Method for enhancing concrete interface bonding force through graphene or graphene oxide and silica fume
The invention discloses a method for enhancing concrete interface bonding force by graphene or graphene oxide and silica fume, which comprises the following steps: firstly, chiseling an old concrete interface, then uniformly spraying a mixed dispersion liquid of G/GO and silica fume so as to form an old concrete pretreatment bonding surface, and finally, covering the pretreatment bonding surface with bonding mortar so as to form the graphene/graphene oxide/silica fume enhanced concrete interface bonding force. And the old concrete is tightly combined with the bonding mortar layer. According to the invention, the uniform dispersion liquid is prepared from the G/GO and the silica fume to pretreat a bonding interface, so that the problem of uneven dispersion caused by directly adding the G/GO into a cementing material is avoided, and the problems of dust pollution and aggregate dispersion in the transportation and use process of the silica fume are avoided. Generation of hydrated calcium silicate gel is attracted by means of G/GO, silica fume participates in secondary hydration of cement, and through the combined action of the G/GO and the silica fume, the compactness degree of a bonding interface is increased, and the bonding strength of the interface is improved. Meanwhile, the consumption of G/GO and silica fume is extremely low, the cost is low, the components are green and environment-friendly, and the operation is simple and easy to implement.
本发明公开了一种石墨烯或氧化石墨烯及硅灰增强混凝土界面粘接力的方法，首先对旧混凝土界面进行凿毛处理，然后均匀喷涂G/GO和硅灰的混合分散液，以此形成旧混凝土预处理粘接面，最后将粘接砂浆覆盖在此预处理粘接面，使旧混凝土与粘接砂浆层紧密结合。本发明通过将G/GO、硅灰制成均匀的分散液预处理粘接界面，规避了G/GO直接加入胶凝材料分散不均的问题，避免了硅灰运输使用过程中的粉尘污染及团聚体分散问题。借助G/GO吸引水化硅酸钙凝胶的生成，通过硅灰参与水泥二次水化，二者共同作用，增加粘接界面的致密程度，提高界面粘接强度。同时G/GO、硅灰用量极少，成本较低，成分绿色环保，操作简单易行。
Method for enhancing concrete interface bonding force through graphene or graphene oxide and silica fume
石墨烯或氧化石墨烯及硅灰增强混凝土界面粘接力的方法
YANG FENGYUAN (author) / CHEN HONGYU (author) / WANG AIWEN (author) / CHEN JIAKUN (author)
2022-03-11
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Preparation method of graphene bonding modified silica fume
| European Patent Office | 2015
Graphene oxide and silica fume composite modified concrete and preparation method thereof
| European Patent Office | 2022
| British Library Online Contents | 2010
Condensed Silica Fume in Concrete
| UB Braunschweig | 1988