Sustained-release anti-freezing point asphalt pavement admixture and preparation method thereof
A slow-release technology for asphalt pavement, which is applied in the preparation and application of environmentally friendly deicing agents, can solve the problems of unsatisfactory slow-release effect, high cost, and general long-term performance, and achieve reduced maintenance costs, low prices, and improved long-term effect
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Embodiment 1
[0040] A slow-release anti-freezing point asphalt pavement admixture is prepared from modified volcanic rock powder, freezing point depressant and surfactant; the mass percentage of each raw material component is: modified volcanic rock powder is 40%, chlorine Sodium is 55%, Sipan 80 is 5%;
[0041] A preparation method of a slow-release anti-freezing point asphalt pavement admixture, carried out according to the following steps:
[0042] (1) material preparation
[0043] After the volcanic rock is ground, it is calcined at 800°C to obtain a specific surface area greater than 300m 2 / kg of modified volcanic rock powder;
[0044] Add sodium chloride to water to make a saturated aqueous solution of sodium chloride.
[0045] (2) Preparation of salt carrier
[0046] According to the proportion, add the modified volcanic rock powder into saturated aqueous sodium chloride solution, stir at 25°C for 4 hours at a stirring rate of 2500r / min, and after mixing thoroughly, dry at 135°C ...
Embodiment 2
[0052] A slow-release anti-freezing point asphalt pavement admixture is prepared from modified volcanic rock powder, freezing point depressant and surfactant; each raw material component and its mass percentage are: modified volcanic rock powder is 40%, Sodium chloride is 55%, Span 60 is 5%;
[0053] A preparation method of a slow-release anti-freezing point asphalt pavement admixture, carried out according to the following steps:
[0054] (1) material preparation
[0055] After the volcanic rock is ground, it is calcined at 800°C to obtain a specific surface area greater than 300m 2 / kg of modified volcanic rock powder;
[0056] Add sodium chloride to water to make a saturated aqueous solution of sodium chloride.
[0057] (2) Preparation of salt carrier
[0058] According to the proportion, add the modified volcanic rock powder into the saturated sodium chloride aqueous solution, stir at 25°C for 4 hours at a stirring rate of 3000r / min, after mixing thoroughly, dry at 135...
Embodiment 3
[0064] A slow-release anti-freezing point asphalt pavement admixture is prepared from modified volcanic rock powder, freezing point depressant and surfactant; each raw material component and its mass percentage are: modified volcanic rock powder is 40%, Sodium chloride is 55%, OP-10 is 5%;
[0065] A preparation method of a slow-release anti-freezing point asphalt pavement admixture, carried out according to the following steps:
[0066] (1) material preparation
[0067] After the volcanic rock is ground, it is calcined at 800°C to obtain a specific surface area greater than 300m 2 / kg of modified volcanic rock powder;
[0068] Add sodium chloride to water to make a saturated aqueous solution of sodium chloride.
[0069] (2) Preparation of salt carrier
[0070] According to the proportion, add the modified volcanic rock powder into the saturated sodium chloride aqueous solution, stir at 25°C for 5h at a stirring rate of 2500r / min, after mixing thoroughly, dry at 130°C unti...
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