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 a preparation method of recycled concrete, which comprises the following steps: soaking recycled aggregate in a nano calcium carbonate suspension to obtain recycled aggregate in a saturated water state; treating the recycled aggregate in the saturated water state to obtain the recycled aggregate in a saturated surface dry state; mixing the recycled aggregate in the saturated surface dry state with a cementing material and water to obtain prefabricated recycled concrete; the prefabricated recycled concrete is placed in a curing box with the temperature of 10-20 DEG C and the relative humidity of 70-90% to be cured until a carbonized layer appears on the surface of the prefabricated recycled concrete, and the recycled concrete is obtained. The recycled aggregate saturated and treated by the nano calcium carbonate suspension is used for prefabricating the recycled concrete, the recycled concrete is cured in a set curing box, nano calcium carbonate and calcium hydroxide continuously migrate to the surface of the recycled concrete through the migration effect of a pore solution, and calcium hydroxide makes contact with carbon dioxide to be subjected to a carbonization reaction, so that a compact carbonization protection layer is formed; erosion media in the environment are prevented from entering the concrete, and the durability of the recycled concrete is effectively improved.
本申请涉及一种再生混凝土的制备方法，包括：将再生骨料置于纳米碳酸钙悬浮液中浸泡，以得到饱水状态的再生骨料；将饱水状态的再生骨料进行处理，以得到饱和面干状态的再生骨料；将饱和面干状态的再生骨料与胶凝材料、水拌合，以得到预制的再生混凝土；将预制的再生混凝土置于温度10～20℃、相对湿度70～90％的养护箱中养护至其表面出现碳化层，以得到再生混凝土。本发明使用经纳米碳酸钙悬浮液饱水并处理的再生骨料预制再生混凝土，于设定养护箱中养护，通过孔溶液迁移作用，纳米碳酸钙与氢氧化钙不断向再生混凝土表面迁移，氢氧化钙与二氧化碳接触发生碳化反应，形成致密的碳化保护层，阻断环境中侵蚀介质进入混凝土内部，有效提升再生混凝土的耐久性。
Recycled concrete and preparation method thereof
The invention relates to a preparation method of recycled concrete, which comprises the following steps: soaking recycled aggregate in a nano calcium carbonate suspension to obtain recycled aggregate in a saturated water state; treating the recycled aggregate in the saturated water state to obtain the recycled aggregate in a saturated surface dry state; mixing the recycled aggregate in the saturated surface dry state with a cementing material and water to obtain prefabricated recycled concrete; the prefabricated recycled concrete is placed in a curing box with the temperature of 10-20 DEG C and the relative humidity of 70-90% to be cured until a carbonized layer appears on the surface of the prefabricated recycled concrete, and the recycled concrete is obtained. The recycled aggregate saturated and treated by the nano calcium carbonate suspension is used for prefabricating the recycled concrete, the recycled concrete is cured in a set curing box, nano calcium carbonate and calcium hydroxide continuously migrate to the surface of the recycled concrete through the migration effect of a pore solution, and calcium hydroxide makes contact with carbon dioxide to be subjected to a carbonization reaction, so that a compact carbonization protection layer is formed; erosion media in the environment are prevented from entering the concrete, and the durability of the recycled concrete is effectively improved.
本申请涉及一种再生混凝土的制备方法，包括：将再生骨料置于纳米碳酸钙悬浮液中浸泡，以得到饱水状态的再生骨料；将饱水状态的再生骨料进行处理，以得到饱和面干状态的再生骨料；将饱和面干状态的再生骨料与胶凝材料、水拌合，以得到预制的再生混凝土；将预制的再生混凝土置于温度10～20℃、相对湿度70～90％的养护箱中养护至其表面出现碳化层，以得到再生混凝土。本发明使用经纳米碳酸钙悬浮液饱水并处理的再生骨料预制再生混凝土，于设定养护箱中养护，通过孔溶液迁移作用，纳米碳酸钙与氢氧化钙不断向再生混凝土表面迁移，氢氧化钙与二氧化碳接触发生碳化反应，形成致密的碳化保护层，阻断环境中侵蚀介质进入混凝土内部，有效提升再生混凝土的耐久性。
Recycled concrete and preparation method thereof
一种再生混凝土及其制备方法
MA MENGYANG (Autor:in) / LONG YONG (Autor:in) / GAO LIQIANG (Autor:in) / CHEN LUYI (Autor:in) / OUYANG HUALIN (Autor:in) / SHI GANG (Autor:in) / PENG XUMIN (Autor:in) / WANG YU (Autor:in)
25.04.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
Recycled concrete, recycled concrete prefabricated part and preparation method thereof
| Europäisches Patentamt | 2021