A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Recycled coarse aggregate concrete and preparation method thereof
According to the recycled coarse aggregate concrete and the preparation method thereof provided by the invention, the recycled coarse aggregate is prepared by using the waste concrete, and the gelatinized starch permeating into the gaps of the recycled coarse aggregate is subjected to grafting reaction, so that the gaps generated in the crushing process of the recycled coarse aggregate are filled, and the water absorption rate of the coarse aggregate is reduced, so that the quality of the concrete is ensured. After the starch free radical solution infiltrating into the gaps of the recycled coarse aggregate and the unsaturated monomer are subjected to polymerization reaction, an approximately continuous structure is formed, and the bonding strength of the recycled coarse aggregate and other components is improved. Along with the increase of the addition proportion of the starch free radical solution, the release amount of cement hydration heat is also reduced to a certain extent, so that the formula is also beneficial to reducing the temperature stress of the concrete and reducing the cracking of the concrete.
本发明提供了一种再生粗骨料混凝土及其制备方法，使用废弃混凝土制备再生粗骨料，通过将渗入再生粗骨料缝隙中的糊化淀粉进行接枝反应，填充了再生粗骨料破碎过程中产生的缝隙，减少了粗骨料的吸水率，以保证混凝土质量。渗入到再生粗骨料缝隙中的淀粉自由基溶液与不饱和单体在发生聚合反应后，形成接近连续的结构，增大了再生粗骨料与其他组分的结合强度。随着淀粉自由基溶液添加比例的提高，水泥水化热的释放量也有一定程度的降低，所以该配方还有助于减少混凝土温度应力、减少混凝土开裂。
Recycled coarse aggregate concrete and preparation method thereof
According to the recycled coarse aggregate concrete and the preparation method thereof provided by the invention, the recycled coarse aggregate is prepared by using the waste concrete, and the gelatinized starch permeating into the gaps of the recycled coarse aggregate is subjected to grafting reaction, so that the gaps generated in the crushing process of the recycled coarse aggregate are filled, and the water absorption rate of the coarse aggregate is reduced, so that the quality of the concrete is ensured. After the starch free radical solution infiltrating into the gaps of the recycled coarse aggregate and the unsaturated monomer are subjected to polymerization reaction, an approximately continuous structure is formed, and the bonding strength of the recycled coarse aggregate and other components is improved. Along with the increase of the addition proportion of the starch free radical solution, the release amount of cement hydration heat is also reduced to a certain extent, so that the formula is also beneficial to reducing the temperature stress of the concrete and reducing the cracking of the concrete.
本发明提供了一种再生粗骨料混凝土及其制备方法，使用废弃混凝土制备再生粗骨料，通过将渗入再生粗骨料缝隙中的糊化淀粉进行接枝反应，填充了再生粗骨料破碎过程中产生的缝隙，减少了粗骨料的吸水率，以保证混凝土质量。渗入到再生粗骨料缝隙中的淀粉自由基溶液与不饱和单体在发生聚合反应后，形成接近连续的结构，增大了再生粗骨料与其他组分的结合强度。随着淀粉自由基溶液添加比例的提高，水泥水化热的释放量也有一定程度的降低，所以该配方还有助于减少混凝土温度应力、减少混凝土开裂。
Recycled coarse aggregate concrete and preparation method thereof
一种再生粗骨料混凝土及其制备方法
QIU YING (author) / ZHANG HUA (author) / XIAN JIAZHI (author) / MA BINBIN (author)
2024-07-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Recycled coarse aggregate concrete and preparation method thereof
| European Patent Office | 2020
Carbonized recycled coarse aggregate concrete and preparation method thereof
| European Patent Office | 2023
Preparation method of modified recycled coarse aggregate and recycled concrete
| European Patent Office | 2024
| European Patent Office | 2022
| European Patent Office | 2022