Preparation method of chemical reaction type cold patch asphalt mixture

A chemical reaction type, cold patching asphalt technology, applied in the field of road engineering, can solve the problems of insufficient volatilization, insufficient initial strength, poor water stability, etc., and achieve the effect of rapid response, compact structure and high early strength

Inactive Publication Date: 2021-05-28
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention aims to propose a method for preparing a chemical reaction type cold-patched asphalt mixture, which reduces the viscosity of the asphalt by mixing an appropriate amount of diluent into the asphalt, so that the cold-patched asphalt mixture can be used in Construction at room temperature; by adding a chemical reactant to the asphalt mixture, the chemical reactant can react with the diluent after the road surface is repaired, which can greatly improve the bonding effect between the asphalt mixture, and can also Make the cold-patch asphalt mixture have better construction workability, effectively solve the problem of insufficient initial strength of the existing cold-patch asphalt mixture pavement, poor water stability caused by large porosity, and slow and volatile diesel oil inside the concrete inadequate problem

Method used

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  • Preparation method of chemical reaction type cold patch asphalt mixture

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Embodiment 1

[0033] A method for preparing a chemical reaction type cold-patch asphalt mixture, specifically comprising the following steps:

[0034] 1) Preparation of cold patching reagent

[0035] CaCO 3 , SiO 2 with Fe 2 o 3 After fully mixing evenly according to the molar ratio of 3:1:0.006, put it into a high-temperature furnace and raise the temperature to 800°C for 20 minutes. After the heat preservation is completed, heat it up to 1500°C for 30 minutes. Calcined product A is obtained, wherein the CaCO in the calcined raw material 3 , SiO 2 , Fe 2 o 3 All quality scores are ≥95%,

[0036] The calcined product A and NaOH are mixed according to a mass ratio of 1:0.5, and then placed in a ball mill to be ground into powder to obtain a cold-replenishment reagent, wherein NaOH is analytically pure, and its mass fraction is ≥99%;

[0037] 2) Preparation of reactive asphalt fluid

[0038]Heat the base asphalt at 170°C to soften it, add a diluent to the softened base asphalt solut...

Embodiment 2

[0048] A method for preparing a chemical reaction type cold-patch asphalt mixture, specifically comprising the following steps:

[0049] 1) Preparation of cold patching reagent

[0050] CaCO 3 , SiO 2 with Fe 2 o 3 After fully mixing evenly according to the molar ratio of 3:1:0.006, put it into a high-temperature furnace and raise the temperature to 800°C for 20 minutes. After the heat preservation is completed, heat it up to 1500°C for 30 minutes. Calcined product A is obtained, wherein the CaCO in the calcined raw material 3 , SiO 2 , Fe 2 o 3 All quality scores are ≥95%,

[0051] Calcined product A and Ca(OH) 2 After being mixed at a mass ratio of 1:0.5, it is placed in a ball mill and ground into powder to obtain a cold-replenishment reagent, wherein Ca(OH) 2 It is analytically pure, and its mass fraction is ≥99%;

[0052] 2) Preparation of reactive asphalt fluid

[0053] Heat the base asphalt at 170°C to soften it, add a diluent to the softened base asphalt so...

Embodiment 3

[0063] A method for preparing a chemical reaction type cold-patch asphalt mixture, specifically comprising the following steps:

[0064] 1) Preparation of cold patching reagent

[0065] CaCO 3 , SiO 2 with Fe 2 o 3 After fully mixing evenly according to the molar ratio of 3:1:0.006, put it into a high-temperature furnace and raise the temperature to 800°C for 20 minutes. After the heat preservation is completed, heat it up to 1500°C for 30 minutes. Calcined product A is obtained, wherein the CaCO in the calcined raw material 3 , SiO 2 , Fe 2 o 3 All quality scores are ≥95%,

[0066] The calcined product A and CaO are mixed according to a mass ratio of 1:1, and then placed in a ball mill to be ground into powder to obtain a cold patching reagent, wherein CaO is analytically pure, and its mass fraction is ≥99%;

[0067] 2) Preparation of reactive asphalt fluid

[0068] Heat the base asphalt at 170°C to soften, add a diluent to the softened base asphalt solution, stir e...

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Abstract

The invention provides a preparation method of a chemical reaction type cold patch asphalt mixture. According to the preparation method, a proper amount of a special diluent is doped into asphalt to reduce the viscosity of the asphalt so as to enable the cold patch asphalt mixture to be constructed at normal temperature, a chemical reactant is doped into the asphalt mixture, and after a pavement is repaired, the chemical reactant can react with the special diluent, so that not only is the bonding effect between the asphalt mixture improved, but also the cold patch asphalt mixture has better construction workability. In addition, a calcined product prepared by calcining CaCO3, SiO2 and Fe2O3 can be slowly hydrated after construction of the cold patch asphalt mixture to generate Ca(OH)2, the chemical reactant and oleic acid are promoted to continuously react to generate fatty acid salt, and the resultant can be used for filling gaps of the mixture, so that the structure of the asphalt mixture is denser, and the water stability and the later strength of the mixture can be improved.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a preparation method of a chemical reaction type cold patch asphalt mixture. Background technique [0002] With the rapid development of my country's transportation industry, asphalt pavement is widely used in the construction of highways, urban roads and other types of roads. During long-term use, asphalt pavement gradually appears various road surface diseases such as rutting, potholes, and cracks under the action of natural conditions and vehicle loads. Among them, pavement potholes will not only affect road performance and driving comfort, but also endanger driving safety. Therefore, timely repair of pavement potholes is very important. [0003] As an efficient and convenient road repair material, cold-patch asphalt mixture can be applied to road sections with small engineering volume and scattered potholes. In addition, cold patching materials are not limited by n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/06C04B26/26
CPCC04B40/0039C04B26/26C04B2111/0075C04B22/064C04B22/06C04B22/062C04B24/085C04B14/28C04B14/04
Inventor 沈凡刘非易韦国苏余泳幸满吉田姜亦夏张子艺姜庭威李国梁陈楚琪沈永李
Owner WUHAN INSTITUTE OF TECHNOLOGY
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