Cement-based material self-repairing agent applicable to low-temperature environments and application of self-repairing agent
A technology of cement-based materials and low-temperature environment, which is applied in the field of interdisciplinary science, can solve the problems that the self-repair function cannot meet the needs, and achieve the effect of meeting actual engineering needs, strong durability, and simple application methods
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Embodiment 1
[0025] A self-healing agent for cement-based materials suitable for low-temperature environments. The self-healing agent is suitable for low-temperature or normal-temperature environments. The self-healing agent includes the following components in terms of mass percentages: 2.0wt% of Bacillus lysinica powder, 29.0wt% of calcium lactate , Water 69.0wt%.
[0026] The preparation method of the self-healing agent for cement-based materials suitable for low-temperature environments includes dissolving calcium lactate and Bacillus lysinica powder in water respectively, stirring evenly, and mixing to ensure that the self-healing agent does not delaminate.
[0027] Prepare cement-based material specimens at 20°C, including 450g of cement, 1350g of sand, and 225g of tap water. During the mixing process, a cement-based material self-healing agent with 2% of the cement mass is added, and the specimens are formed by mixing and placed in the environment. Curing was carried out at 2°C, and...
Embodiment 2
[0029] A self-healing agent for cement-based materials suitable for low-temperature environments. The self-healing agent is suitable for low-temperature or normal-temperature environments. The self-healing agent includes the following components in terms of mass percentages: 2.0 wt% of Bacillus lysinica powder, calcium chloride and lactic acid Calcium complex 29.5wt%, ionized water 68.5wt%.
[0030] Cement-based material specimens were prepared at 20°C, including 450g of cement, 1350g of sand, and 225g of tap water. During the mixing process, 0.5% cement-based material self-healing agent was added to the cement-based material, and the specimens were formed by mixing and placed in the environment. Curing was carried out at a temperature of 5°C. Cracks were formed after 7 days of curing. Then, curing was also carried out at an ambient temperature of 5°C. After 7 days of curing, the self-healing effect of cracks in cement-based materials was tested by SEM and XRD, as shown in fig...
Embodiment 3
[0033] A self-healing agent for cement-based materials suitable for low-temperature environments. The self-healing agent is suitable for low-temperature or normal-temperature environments. The self-healing agent includes the following components in terms of mass percentages: 2.5wt% of Bacillus lysinica powder, 29.0wt% of calcium lactate , Ionized water 68.5wt%.
[0034] Prepare cement-based material specimens at 20°C, including 450g of cement, 1350g of sand, and 225g of tap water. During the mixing process, a cement-based material self-healing agent with 2% of the cement mass is added, and the specimens are formed by mixing and placed in the environment. Curing is carried out at 10°C. Cracks are created after 7 days of curing. Then, the curing is also carried out at an ambient temperature of 10°C. After 7 days of curing, the surface repair rate of cracks reaches 95%. image 3 shown. Compared with the pure cement mortar of the test piece, there is no obvious repair on the surf...
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