A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for carbon sequestration and reinforcement of recycled aggregate by using composite alkali solution and recycled aggregate
The invention relates to a method for carbon sequestration and reinforcement of recycled aggregate by using a composite alkali solution and recycled aggregate, and the method comprises the following steps: the waste concrete recycled aggregate is soaked by using the composite alkali solution, the solute of the composite alkali solution comprises a first solute and a second solute which are used for reacting to generate sodium hydroxide, the first solute is soluble alkali with hydroxyl, and the second solute is soluble sodium salt; and introducing carbon dioxide into the composite alkali solution, and carrying out a carbonization reaction to obtain the recycled aggregate. According to the method, the composite alkali solution which is higher in operability and safer is used for exciting the recycled aggregate to be attached to the unhydrated clinker in the mortar and the mineral admixture to generate the hydration product, carbon dioxide is used for enabling the hydration product and the residual alkali solution to be subjected to carbonization reaction, calcium carbonate is generated to block pores and cracks, and the performance of the recycled aggregate can be effectively improved.
本申请涉及一种利用复合碱溶液固碳强化再生骨料的方法及再生骨料，其包括如下步骤：利用复合碱溶液浸泡废弃混凝土再生骨料，所述复合碱溶液的溶质包括用于反应生成氢氧化钠的第一溶质和第二溶质，其中，所述第一溶质为具有氢氧根的可溶性碱，所述第二溶质为可溶性钠盐；再向所述复合碱溶液中通入二氧化碳进行碳化反应，得到再生骨料。本申请利用操作性更强且更安全的复合碱溶液，以激发再生骨料附着砂浆中未水化熟料与矿物掺合料生成水化产物，并利用二氧化碳使水化产物与残留碱溶液发生碳化反应，生成碳酸钙以堵塞孔隙与裂缝，能够有效改善再生骨料性能。
Method for carbon sequestration and reinforcement of recycled aggregate by using composite alkali solution and recycled aggregate
The invention relates to a method for carbon sequestration and reinforcement of recycled aggregate by using a composite alkali solution and recycled aggregate, and the method comprises the following steps: the waste concrete recycled aggregate is soaked by using the composite alkali solution, the solute of the composite alkali solution comprises a first solute and a second solute which are used for reacting to generate sodium hydroxide, the first solute is soluble alkali with hydroxyl, and the second solute is soluble sodium salt; and introducing carbon dioxide into the composite alkali solution, and carrying out a carbonization reaction to obtain the recycled aggregate. According to the method, the composite alkali solution which is higher in operability and safer is used for exciting the recycled aggregate to be attached to the unhydrated clinker in the mortar and the mineral admixture to generate the hydration product, carbon dioxide is used for enabling the hydration product and the residual alkali solution to be subjected to carbonization reaction, calcium carbonate is generated to block pores and cracks, and the performance of the recycled aggregate can be effectively improved.
本申请涉及一种利用复合碱溶液固碳强化再生骨料的方法及再生骨料，其包括如下步骤：利用复合碱溶液浸泡废弃混凝土再生骨料，所述复合碱溶液的溶质包括用于反应生成氢氧化钠的第一溶质和第二溶质，其中，所述第一溶质为具有氢氧根的可溶性碱，所述第二溶质为可溶性钠盐；再向所述复合碱溶液中通入二氧化碳进行碳化反应，得到再生骨料。本申请利用操作性更强且更安全的复合碱溶液，以激发再生骨料附着砂浆中未水化熟料与矿物掺合料生成水化产物，并利用二氧化碳使水化产物与残留碱溶液发生碳化反应，生成碳酸钙以堵塞孔隙与裂缝，能够有效改善再生骨料性能。
Method for carbon sequestration and reinforcement of recycled aggregate by using composite alkali solution and recycled aggregate
利用复合碱溶液固碳强化再生骨料的方法及再生骨料
MA MENGYANG (author) / LIU DAODE (author) / CHEN RENGUANG (author) / MAO WEIQI (author) / NONG DAIPEI (author) / PENG XUMIN (author) / WANG YU (author) / WU BAIHAN (author) / BAI MIN (author) / WANG SHUO (author)
2023-12-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Double carbon sequestration recycled aggregate concrete production system
| European Patent Office | 2024
| European Patent Office | 2023
| European Patent Office | 2022
RECYCLED AGGREGATE PRODUCTION SYSTEM, AND RECYCLED AGGREGATE PRODUCTION METHOD
| European Patent Office | 2022