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Additive for warm-mixing rubber-asphalt mixture and mixing method of mixture

A technology of rubber asphalt and additives, which is applied in building insulation materials, building components, climate change adaptation, etc. It can solve the problems of threatening the personal safety of operators and harmfulness to human body, and achieve the effects of improving the working environment, reducing emissions, and reducing energy consumption

Inactive Publication Date: 2012-08-29
RES INST OF HIGHWAY MINIST OF TRANSPORT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a high temperature is very unfavorable for the use of waste rubber, and a large amount of smoke will be generated during construction, which is usually harmful to the human body, thus threatening the personal safety of operators

Method used

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  • Additive for warm-mixing rubber-asphalt mixture and mixing method of mixture
  • Additive for warm-mixing rubber-asphalt mixture and mixing method of mixture
  • Additive for warm-mixing rubber-asphalt mixture and mixing method of mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Synthesis of 2-methylamino-5-(2'-amino-3'-hydroxybutyl)pyrazine

[0032] 9g (0.1mol) triethylamine and 146g (1mol) 1,4-diamino-4 hydroxy-pentan-2-ketone are installed in a four-neck flask equipped with a dropping funnel of a thermometer, a stirring rod, and a condenser tube, to 400ml of dichloromethane was dissolved, and 96.7g (1.1mol) of 1-aminoacetylmethylamine was added dropwise to the bottle through the dropping funnel, and reacted at 60-70°C for 10 hours. The reaction solution was cooled to room temperature, and concentrated to remove the solvent. Recrystallize twice with a 30:70 toluene and ethanol solution to obtain 2-methylamino-5-(2'-amino-3'-hydroxybutyl)pyrazine as a light yellow solid, melting point, 78-79°C, liquid -The molecular weight measured by mass spectrometry is 197.

Embodiment 2

[0033] Example 2: Synthesis of 2-methylamino-5-(2'-amino-3'-hydroxybutyl)pyridine

[0034]Put 68.2g (1.1mol) of propargyl sodium and 200ml of pyridine in a 1L four-necked flask equipped with a thermometer, a stirring rod, a condenser tube and a dropping funnel. Add 157g (1mol) 1-methylamino-5-chloromethylpyridine dropwise, stir the reaction at 50°C after the dropwise addition, and concentrate to remove Solvent, the residue was dissolved in 500ml of ethyl acetate, washed three times with 50ml of water, dried over sodium sulfate, put into the solution 5g of sodium silk, and placed in a desiccator for 24 hours. The mixture was transferred to a 2L autoclave equipped with 50g of Lindlar catalyst, and the air in the autoclave was purged with hydrogen to keep the temperature of the autoclave at about 40°C and the pressure of hydrogen at 1.8 atmospheres. The reaction was carried out for 24 hours. Open the autoclave, add 80g of peracetic acid thereinto, and continue to react at 40°C ...

Embodiment 3

[0036] The stone gradation used is shown in Table 1.

[0037] Table 1 Grading of warm mix rubber asphalt mixture

[0038] square hole sieve

(mm)

Synthesis pass rate (%)

16

100

13.2

95.43

9.5

65.69

4.75

30.00

2.36

23.60

1.18

18.38

0.6

14.45

0.3

11.42

0.15

8.44

0.075

7.05

[0039] The rubber asphalt used was purchased from Shandong Dashan Road and Bridge Engineering Co., Ltd., and its performance indicators are listed in Table 2, which meets the requirements of the "Technical Guidelines for Design and Construction of Beijing Waste Tire Rubber Powder Asphalt and Mixture".

[0040] Table 2 Test results of rubber asphalt performance indicators

[0041]

[0042] Asphalt Rotating Thin Film Oven Test TFOT

[0043]

[0044] The mixing operation of the mixture is as follows:

[0045] (1) Pre-heat the s...

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Abstract

The invention relates to a compound with a formula I in the specification, which is used for a rubber-asphalt mixture for paving. In the formula, at least one of R1 and R2 is N and the rest is C. The invention also relates to the rubber-asphalt mixture for paving and a mixing method, the mixture comprises the compound shown in the formula I, the rubber-asphalt, building stones and cement and / or mineral power. By utilizing the compound and the method, pavement materials can be mixed under lower temperature, thereby the purposes of emission reduction and energy saving can be realized.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a preparation method of pavement materials, in particular to a warm-mixed rubber asphalt mixture. Background technique [0002] Currently known asphalt mixtures used for asphalt pavement construction and maintenance mainly include two types: hot mix asphalt mixture and cold mix (normal temperature) asphalt mixture, of which hot mix asphalt mixture is the mainstream technology. Harmful gas emissions, excessive energy consumption, and thermal aging of hot mix asphalt mixture during mixing, transportation, and paving have attracted more and more attention. Although cold-mix asphalt mixture has great advantages in terms of environmental protection and energy consumption, it can only be used for asphalt pavement because its road performance is still far behind that of hot-mix asphalt mixture. Underlayer and base course of patched, low traffic pavement, medium to heavy tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C04B24/12C04B26/26
CPCY02A30/30
Inventor 黄颂昌秦永春徐剑吴德龙黄文元
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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