阅读说明：本技术 一种环保型改性沥青及其制备方法 (A kind of environment-friendly modified pitch and preparation method thereof ) 是由 徐鹏 何锐 弥海晨 韩瑞民 弓锐 郭彦强 于 2019-08-29 设计创作，主要内容包括：本发明提供了一种环保型改性沥青及其制备方法,由以下原料制成：具基质沥青,骨胶,褐藻胶,异乳香二烯酮酸,甲醇,氯化铁,瓜尔豆胶,粘合剂,邻苯二甲酸二异辛酯。本发明所用到的主要成分骨胶、褐藻胶、异乳香二烯酮酸和瓜尔豆胶均来自于天然原材料,其原材料来源广泛,均可再生,制备工艺简单,无污染物排放,具有良好的环保效益。氯化铁中的铁离子与骨胶、褐藻胶和异乳香二烯酮酸分子中的活性基团氨基、羧基等发生配位反应,生成骨胶-金属的配位化合物,提高其耐水性,在与基质沥青融解过程中扩散形成了稳定的五元环网状结构,从而改善沥青的高温流变性能,增大其抗车辙能力。(The present invention provides a kind of environment-friendly modified pitches and preparation method thereof, are prepared from the following raw materials: tool matrix pitch, gelatine, algin, isomasticadienonic acid, methanol, iron chloride, guar gum, adhesive, diisooctyl phthalate.Both from natural material, raw material sources are extensive for main component gelatine, algin, isomasticadienonic acid and guar gum used in the present invention, and renewable, preparation process is simple, non-pollutant discharge, have good environmental benefit.Complexation reaction occurs for the active group amino in iron ion and gelatine, algin and isomasticadienonic acid molecule, carboxyl in iron chloride etc., generate gelatine-metal complex, improve its water resistance, with stable five-membered ring reticular structure has been diffuseed to form in matrix pitch melting process, so as to improve the high temperature rheology energy of pitch, increase its rutting resistance.)

1. a kind of environment-friendly modified pitch, which is characterized in that be prepared from the following raw materials: tool matrix pitch, gelatine, algin are different Masticadienonic acid, methanol, iron chloride, guar gum, adhesive, diisooctyl phthalate.

2. environment-friendly modified pitch as described in claim 1, which is characterized in that based on mass fraction, be prepared from the following raw materials: Matrix pitch be 78%~85%, gelatine be 5%~8%, algin be 2%~3%, isomasticadienonic acid be 1.5%~ 2.5%, methanol is 1.3%~2.4%, and iron chloride is 0.2%~0.5%, and guar gum is 3%~4.5%, and adhesive is 1%~2%, diisooctyl phthalate is 0.2%~0.6%, and the sum of parts by weight of raw material are 100%.

3. environment-friendly modified pitch as claimed in claim 2, which is characterized in that based on mass fraction, be prepared from the following raw materials: Matrix pitch is 78%, gelatine 8%, algin 3%, isomasticadienonic acid 2%, methanol 2.4%, and iron chloride is 0.5%, guar gum 4.5%, adhesive 1%, diisooctyl phthalate 0.6%.

4. environment-friendly modified pitch as claimed in claim 2, which is characterized in that based on mass fraction, be prepared from the following raw materials: Matrix pitch is 85%, gelatine 5%, algin 2%, isomasticadienonic acid 1.5%, methanol 1.3%, iron chloride It is 0.2%, guar gum 3%, adhesive 1.8%, diisooctyl phthalate 0.2%.

5. environment-friendly modified pitch as claimed in claim 2, which is characterized in that based on mass fraction, be prepared from the following raw materials: Matrix pitch is 80%, gelatine 6.3%, algin 2.5%, isomasticadienonic acid 2.5%, methanol 2.2%, chlorine Changing iron is 0.3%, guar gum 4.2%, adhesive 1.7%, diisooctyl phthalate 0.3%.

6. environment-friendly modified pitch as claimed in claim 2, which is characterized in that based on mass fraction, be prepared from the following raw materials: Matrix pitch is 82%, gelatine 5.8%, algin 2.2%, isomasticadienonic acid 1.7%, methanol 1.8%, chlorine Changing iron is 0.4%, guar gum 3.7%, adhesive 2%, diisooctyl phthalate 0.4%.

7. environment-friendly modified pitch as claimed in claim 2, which is characterized in that based on mass fraction, be prepared from the following raw materials: Matrix pitch is 80.5%, gelatine 7%, algin 2.7%, isomasticadienonic acid 2.2%, methanol 2%, chlorination Iron is 0.4%, guar gum 3.3%, adhesive 1.4%, diisooctyl phthalate 0.5%.

8. a kind of preparation method of environment-friendly modified pitch, which is characterized in that this method uses such as any power of claim 1 to 7 Benefit requires the formula of the environment-friendly modified pitch.

9. the preparation method of environment-friendly modified pitch as claimed in claim 8, which is characterized in that this method includes following step It is rapid:

Gelatine, algin and isomasticadienonic acid are uniformly mixed by step 1, and methanol is added after being then heated to 40 DEG C, permanent Iron chloride is added in temperature 30 minutes, persistently stirs 30 minutes, virgin rubber A is prepared；

Guar gum and adhesive are heated to 60 DEG C by step 2 after mixing, persistently stir 30 minutes, virgin rubber is prepared B；

After matrix pitch is heated to 160-165 DEG C, virgin rubber A and virgin rubber B is added in step 3, under the conditions of 3000rpm/min, High speed shear 15min, is then added diisooctyl phthalate, under the conditions of 4000rpm/min, high speed shear 30min, and system It is standby to obtain environment-friendly modified pitch.

Technical field

The present invention relates to technical field of road engineering, are related to modified pitch, and in particular to a kind of environment-friendly modified pitch and Preparation method.

Background technique

A large number of studies show that bituminous cements plays a crucial role the performance of bituminous pavement military service performance.It is general Passway asphalt is limited to its own chemical component and composed structure, generally existing temperature sensitivity is big, adhesiveness is low and The defects of durability is poor has seriously affected its using effect as asphalt cementitious matter when.For bi tumenf orr oad These defects carry out materialization study on the modification, the key technology of the service performance of bituminous pavement are significantly promoted with this, by the country The great attention of outer researcher.So-called modified asphalt technology, according to China " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004) definition: " add rubber, resin, high molecular polymer, bitumen, levigate rubber powder or other The outer-penetrating agents such as material (modifying agent), or take to measures such as pitch mild oxidation processing, make the performance of pitch or asphalt It is improved and manufactured asphalt binder ".Polymer modified asphalt technology is due to excellent pavement performance, from it from 19 Increasingly by the common concern of researcher since the proposition of initial stage in century, and the popularization at home and abroad obtaining large area is answered With.

Most common polymer modifiers includes: SBS, SBR, EVA and rubber powder etc., though such product can substantially change The high/low temperature and fatigue behaviour of kind pitch, but have a common problem and exactly the high temperature viscosity of pitch is obviously improved, To guarantee its construction quality, in modified pitch production, mixes and stirs and have to improve construction temperature in paving process, greatly improve energy Source consumption, and increase the discharge of pernicious gas.Meanwhile the raw material of such product derive from petrochemicals, life There is the discharges of a large amount of pollutants during producing, as the production of the promotion of environmental consciousness such product is increasingly limited System, price is also that when the river rises the boat goes up, brings huge pressure to road project.Although there have researcher to propose to be de- using covering The natural materials modified pitch such as soil, diatomite, attapulgite, though obtain certain effect, its to the improvement of pavement performance still It needs to be further improved.Therefore, the free of contamination environment-friendly modified bitumen technology of one kind is developed for pushing using natural material The sustainable development of road engineering plays a significant role.

Summary of the invention

In view of the deficiencies of the prior art, the present invention intends to provide a kind of environment-friendly modified pitch and its system Preparation Method solves the technical problem of modified pitch raw material environmental-protecting performance deficiency in the prior art and performance indicator deficiency.

In order to solve the above-mentioned technical problem, the present invention is realised by adopting the following technical scheme:

A kind of environment-friendly modified pitch, is prepared from the following raw materials: tool matrix pitch, gelatine, algin, different olibanum dienone Acid, methanol, iron chloride, guar gum, adhesive, diisooctyl phthalate.

Specifically, based on mass fraction, being prepared from the following raw materials: matrix pitch be 78%~85%, gelatine be 5%~ 8%, algin is 2%~3%, and isomasticadienonic acid is 1.5%~2.5%, and methanol is 1.3%~2.4%, and iron chloride is 0.2%~0.5%, guar gum is 3%~4.5%, and adhesive is 1%~2%, diisooctyl phthalate 0.2% ~0.6%, the sum of parts by weight of raw material are 100%.

The present invention also has following technical characteristic:

Preferably, based on mass fraction, be prepared from the following raw materials: matrix pitch 78%, gelatine 8%, algin are 3%, isomasticadienonic acid 2%, methanol 2.4%, iron chloride 0.5%, guar gum 4.5%, adhesive is 1%, diisooctyl phthalate 0.6%.

Preferably, based on mass fraction, be prepared from the following raw materials: matrix pitch 85%, gelatine 5%, algin are 2%, isomasticadienonic acid 1.5%, methanol 1.3%, iron chloride 0.2%, guar gum 3%, adhesive is 1.8%, diisooctyl phthalate 0.2%.

Preferably, based on mass fraction, it is prepared from the following raw materials: matrix pitch 80%, gelatine 6.3%, algin It is 2.5%, isomasticadienonic acid 2.5%, methanol 2.2%, iron chloride 0.3%, guar gum 4.2%, bonding Agent is 1.7%, diisooctyl phthalate 0.3%.

Preferably, based on mass fraction, it is prepared from the following raw materials: matrix pitch 82%, gelatine 5.8%, algin It is 2.2%, isomasticadienonic acid 1.7%, methanol 1.8%, iron chloride 0.4%, guar gum 3.7%, bonding Agent is 2%, diisooctyl phthalate 0.4%.

Preferably, based on mass fraction, it is prepared from the following raw materials: matrix pitch 80.5%, gelatine 7%, algin It is 2.7%, isomasticadienonic acid 2.2%, methanol 2%, iron chloride 0.4%, guar gum 3.3%, adhesive It is 1.4%, diisooctyl phthalate 0.5%.

The present invention also protects a kind of preparation method of environment-friendly modified pitch, and this method is changed using environment-friendly type as described above The formula of property pitch.

Method includes the following steps:

Gelatine, algin and isomasticadienonic acid are uniformly mixed by step 1, and first is added after being then heated to 40 DEG C Alcohol constant temperature 30 minutes, is added iron chloride, persistently stirs 30 minutes, virgin rubber A is prepared；

Guar gum and adhesive are heated to 60 DEG C by step 2 after mixing, are persistently stirred 30 minutes, are prepared Virgin rubber B；

After matrix pitch is heated to 160-165 DEG C, virgin rubber A and virgin rubber B is added, in 3000rpm/min condition in step 3 Under, then diisooctyl phthalate is added in high speed shear 15min, under the conditions of 4000rpm/min, high speed shear Environment-friendly modified pitch is prepared in 30min.

Compared with prior art, the present invention having the following technical effect that

(I) present invention used in main component gelatine, algin, isomasticadienonic acid and guar gum both from Natural material, raw material sources are extensive, renewable, and preparation process is simple, non-pollutant discharge, have good environmental protection Benefit.

(II) iron ion in iron chloride and the active group ammonia in gelatine, algin and isomasticadienonic acid molecule Complexation reaction occurs for base, carboxyl etc., generates gelatine-metal complex, improves its water resistance, melt with matrix pitch Stable five-membered ring reticular structure has been diffuseed to form in the process, so as to improve the high temperature rheology energy of pitch, increases its Rut resistance Ability.And the addition of guar gum and adhesive can introduce small molecule branched structure in five-membered ring mesh skeleton structure, improve Its flexibility and ductility.After diisooctyl phthalate is added, improve the compatibility of matrix pitch and virgin rubber A and virgin rubber B, Promote its uniform score, and further increase the low temperature ductility of pitch, improves the cracking resistance of bituminous pavement.

(III) this preparation process significantly reduces the heating temperature in traditional modified pitch preparation process, saves the energy and disappears Low exhaust gas emission drops in consumption, and preparation process is simple.

Specific embodiment

It should be noted that in the application:

Matrix pitch, using 90# matrix pitch, needle penetration is 72 (0.1mm), and softening point is 49 DEG C, and 25 DEG C of ductilities are greater than 100cm, 5 DEG C of ductilities are less than 1cm, and 135 DEG C of brookfield viscosities are 590mPas.

Adhesive uses AURO No.380 adhesive.

Specific embodiments of the present invention are given below, it should be noted that the invention is not limited to implement in detail below Example, all equivalent transformations made on the basis of the technical solutions of the present application each fall within protection scope of the present invention.