Application technology for humic acid derivatives used as asphalt composition

A technology of humic acid and derivatives, applied in building structures, building components, building insulation materials, etc., can solve the problems of unknown asphalt components and asphalt modification, so as to alleviate the market supply of asphalt and improve high and low temperature performance. , the effect of simple preparation process

Active Publication Date: 2016-10-05
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There is no report on the use of humic acid and its derivatives as asphalt components and asphalt modification.

Method used

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  • Application technology for humic acid derivatives used as asphalt composition
  • Application technology for humic acid derivatives used as asphalt composition
  • Application technology for humic acid derivatives used as asphalt composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Put the humic acid in an oven at 95°C and dry it to constant weight for about 10 hours.

[0023] (2) Humic acid powder is added in the vacuum kneader according to the pitch mass ratio (the same below) as 10%, 15%, 25%, and 30%, and the kneader material temperature is set to 100°C, and the kneading time is 60min. The vacuum pump was turned on during the period of ~20min and 40~60min.

[0024] (3) The obtained samples were tested for softening point (standard GB / T 4507-1999, the same below), penetration (standard GB / T 4509-2010, the same below), ductility (standard GB / T 4508-2010, the same below), The same) performance index determination, the results are listed in Table 1.

[0025] Table 1 Summary table of results of Example 1

[0026]

Embodiment 2

[0028] (1) Humic acid and calcium hydroxide emulsion are reacted to form calcium humate, and the pH is adjusted to 9-10, and placed in an oven at 80-100°C to dry to constant weight.

[0029] (2) Dry the calcium humate and grind it into powder with a pulverizer.

[0030] (3) Add a certain quality of AH-90 asphalt into a stainless steel container, and heat it on a heating plate to 100°C to melt the asphalt into a slurry.

[0031] (4) The auxiliary agent is added in the stainless steel cup according to the addition mass ratio of 3%.

[0032] (5) Stir and mix with a high-speed shear emulsifier, set the rotating speed to 5000r / min, and set the stirring time to 60min. The calcium humate powder is added in a stainless steel cup according to the addition mass ratio of 5%.

[0033] (6) Measure the softening point, penetration and ductility performance indexes of the obtained samples, and repeat the above steps to determine the addition experiment of 10%, 20%, 25% and 30% additive mas...

Embodiment 3

[0037] (1) Dry the calcium humate and grind it into powder with a pulverizer.

[0038] (2) Add a certain quality of AH-90 asphalt into a stainless steel container, and heat it on a heating plate to 100°C to melt the asphalt into a slurry.

[0039] (3) Stir and mix with a high-speed shear emulsifier, and set the rotating speed to 5000r / min. According to the mass fraction of 25%, the corresponding mass of calcium humate powder is weighed and added to a stainless steel container. Set the stirring time to 60min.

[0040] (4) The auxiliary agent is added in the stainless steel cup according to the added mass of 1%.

[0041] (5) Determination of softening point, penetration and ductility performance indexes of the obtained samples. Repeat the above steps to measure the addition experiment of 2%, 3% and 4% additive mass fraction, and the results are listed in Table 3.

[0042] Table 3 Example 3 result summary table

[0043]

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Abstract

The invention relates to a formula and a mixing technology for natural humic acid and derivatives of the natural humic acid used as modifying components of pavement asphalt. The formula and the mixing technology comprise a technology and equipment for complete mixing of humic acid powder or calcium humate generated by a preliminary reaction of humic acid with calcium hydroxide, and asphalt. According to different varieties and application requirements of the asphalt, different formulas can be adopted. The asphalt of the asphalt composition series has the following advantages: the softening point reaches the standard; low-temperature performance is well improved; and standards and practical technologies of relevant modified asphalt are met. The invention provides a high-value-added utilization method for the asphalt used as a pavement binding material. High-value-added utilization of humic acid and cost reduction of modified asphalt have important values on alleviating of the lack of market supply of the asphalt and improvement of high-temperature and low-temperature performances of the asphalt. The technology provided by the invention is a complete set of practical techniques for recycling and high-value-added utilization of solid wastes. The technology provided by the invention has the advantages of widely-available raw materials, simple preparation process, and good economic, social and environmental benefits.

Description

technical field [0001] The invention relates to the formulation and composite technology of humic acid and its derivatives as modified components of pavement asphalt, and belongs to the technical field of building materials and applications. Background technique [0002] Natural humic acid (HA for short) is the remains of animals and plants (mainly plant remains), a type of organic substance accumulated through microbial decomposition and transformation, and a series of biochemical processes, with reserves of hundreds of billions of tons , is an important biomass resource worthy of development. Humic acid widely exists in rivers, lakes and seas, soil coal mines, mainly in soil, peat, lignite and weathered coal. Humic acid is rich in various active groups such as hydroxyl, carboxyl, methoxy, carbonyl, amino, quinone, etc., which makes it have acidity, hydrophilicity, interface activity, cation exchange ability, complexation ability and adsorption and dispersion ability. Ser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L99/00C08H99/00C07G99/00
Inventor 陈良森尹应武李大川周福亚田孝旭
Owner XIAMEN UNIV
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