CN118495861B - Concrete material containing modified rubber material and preparation method - Google Patents

Abstract

The present invention relates to a concrete material and preparation method containing modified rubber material, belonging to the technical field of concrete materials, wherein the concrete material comprises coarse aggregate, fine aggregate, 90# road petroleum asphalt, modified rubber and polyacrylate emulsion; wherein the modified rubber is a modified rubber obtained by mixing waste tire rubber powder with terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester, PEG-40 anhydrous sorbitan full oleate and sillimanite powder. The modified rubber can greatly improve the performance of waste tire rubber, mix and prepare road concrete, and has good crack resistance, water resistance and wear resistance, etc.; adding waste tire materials in large proportion will not reduce the use performance of concrete, ensure the service life, and the waste tire resource utilization rate is high.

Description

Concrete material containing modified rubber material and preparation method

Technical Field

The invention belongs to the technical field of concrete materials, and in particular relates to a concrete material containing a modified rubber material and a preparation method thereof.

Background Art

With the continuous development of social economy, the energy materials consumed by human activities are increasing day by day, and the amount of waste materials is gradually increasing, such as waste rubber tires, waste rubber gloves, waste rubber conveyor belts, etc. Rubber is a high-molecular elastic material that is not easy to degrade and rot, causing environmental pollution and belonging to a black pollution source. Therefore, it is necessary to reuse waste rubber. At present, the common uses of waste rubber include preparing retreaded tires, preparing road concrete, pyrolysis and refining heavy oil, carbon black, etc.

Among them, when waste rubber tire materials are used as road concrete components, due to the oxidation deterioration of waste tire rubber materials and poor elasticity, the crack resistance, water resistance and wear resistance of road concrete will be reduced. Long-term use will make the road surface prone to cracks or powdering, defects will appear, and the service life will be short. Therefore, the amount of waste rubber tire materials added to road concrete is limited.

Summary of the invention

Aiming at the problem that the existing waste rubber tire materials used in road concrete have poor pavement crack resistance, water resistance and wear resistance, the present invention provides a concrete material containing modified rubber material and a preparation method, using waste tires as raw materials, crushing to obtain waste tire rubber powder, adding terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester, PEG-40 anhydrous sorbitan full oleate and sillimanite powder for mixing, and the obtained modified rubber is used to prepare asphalt concrete for roads, which has good crack resistance, water resistance and wear resistance, etc.; adding a large proportion of waste tire materials will not reduce the performance of concrete, and the service life is guaranteed. The specific technical scheme is as follows:

A concrete material containing modified rubber material, the concrete material comprises the following raw materials in parts by mass: 100 to 150 parts of coarse aggregate, 60 to 90 parts of fine aggregate, 15 to 30 parts of 90# road petroleum asphalt, 20 to 30 parts of modified rubber and 3 to 5 parts of polyacrylate emulsion; the modified rubber is a modified rubber obtained by mixing waste tire rubber powder with terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol, PEG-40 dehydrated sorbitan full oleate and sillimanite powder.

In the above technical scheme, the preparation method of the modified rubber is as follows: crushing the waste tire to obtain waste tire rubber powder; according to the mass ratio, the waste tire rubber powder: terminal hydroxyl polybutadiene HTPB: PEG-4 trimethylolpropane distearate: β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl ester: PEG-40 anhydrous sorbitan full oleate: sillimanite powder = (100-120): (2-5): (0.5-3): (3-6): (0.5-2): (5-10), the waste tire rubber powder, terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl ester, PEG-40 anhydrous sorbitan full oleate, and sillimanite powder are mixed, kneaded, extruded, and crushed to obtain a granular modified rubber.

In the above technical solution, the particle size range of the sillimanite powder is below 500 μm.

In the above technical solution, the mixing temperature is 140°C to 160°C.

In the above technical solution, the particle size of the modified rubber ranges from 1 mm to 3 mm.

In the above technical solution, the coarse aggregate is one or more combinations of limestone, diabase and basalt; the particle size range of the coarse aggregate is 5mm to 20mm.

In the above technical solution, the fine aggregate is one or a combination of limestone and diabase; the particle size of the fine aggregate ranges from 0.1 mm to 3 mm.

The method for preparing the above-mentioned concrete material containing modified rubber material comprises the following steps:

S1: Heat-melt 90# road petroleum asphalt according to mass fraction and set aside;

S2: Coarse aggregate, fine aggregate and modified rubber are mixed according to mass proportions; then polyacrylate emulsion and hot-melt 90# road petroleum asphalt are added and mixed evenly to obtain concrete material.

In S1 of the above preparation method, the temperature of the hot melt is 160°C to 170°C.

In S2 of the above preparation method, the mixing temperature is 160°C to 170°C.

The gypsum powder and its preparation method and application provided by the present invention have the following beneficial effects compared with the prior art:

1. The present invention uses waste tires as raw materials, crushes them to obtain waste tire rubber powder, adds terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl ester, PEG-40 anhydrous sorbitan full oleate and sillimanite powder for mixing, and obtains modified rubber; the modified rubber is mixed with coarse aggregate, fine aggregate, 90# road petroleum asphalt, and polyacrylate emulsion to prepare road concrete, which has good crack resistance, water resistance and wear resistance, etc.; adding a large proportion of waste tire materials will not reduce the use performance of concrete, and the service life is guaranteed.

2. Modified rubber can provide good mechanical properties and waterproof properties, and is not prone to cracking and powdering. Among them, when the modified rubber is mixed and modified, adding terminal hydroxyl polybutadiene HTPB can improve the adhesion, improve the rutting and cracking resistance of concrete, and thus improve the waterproofness and wear resistance.

3. The combination of PEG-4 trimethylolpropane distearate and PEG-40 sorbitan full oleate can improve the homogeneity of rubber mixing and the mixing and fusion of each component, especially the mixing and fusion between waste rubber and β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol and sillimanite powder, so as to achieve a good homogenization effect and thus improve the anti-rutting, cracking resistance, water resistance and wear resistance.

4. The combination of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol and sillimanite powder can improve the strength, oxidation resistance and crack resistance of the modified rubber. Sillimanite powder also has the effect of improving wear resistance, has good anti-rutting and crack resistance, and is not easy to crack and powderize.

5. During the high-temperature mixing process of concrete, modified rubber is mixed with asphalt. The ingredients in the modified rubber can improve the performance of asphalt, including crack resistance, water resistance and wear resistance, and comprehensively improve the various properties of concrete. It can achieve a large amount of waste tire rubber powder without reducing the performance of the road surface, ensuring that the service life is not shortened, and can achieve the mixing and use effect of high-quality rubber.

6. An appropriate amount of polyacrylate emulsion is also added to the concrete mixing, which can improve the mixing and workability of the modified rubber and asphalt, and also has the function of bonding and waterproofing, thereby improving the bonding and waterproofing properties of rubber and asphalt, and can also improve the frost cracking resistance of concrete.

DETAILED DESCRIPTION

The present invention is further described below in conjunction with specific implementation cases, but the present invention is not limited to these embodiments.

Example 1

A concrete material containing modified rubber material, the concrete material comprises the following raw materials in parts by mass: 120 parts of coarse aggregate, 80 parts of fine aggregate, 20 parts of 90# road petroleum asphalt, 25 parts of modified rubber and 4 parts of polyacrylate emulsion; the modified rubber is a waste tire rubber powder which is mixed with terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol, PEG-40 dehydrated sorbitan full oleate and sillimanite powder to obtain the modified rubber.

The coarse aggregate is a mixture of limestone and diabase in equal mass ratio, and the particle size of the coarse aggregate ranges from 5mm to 20mm. The fine aggregate is a mixture of limestone and diabase in equal mass ratio, and the particle size of the fine aggregate ranges from 0.1mm to 3mm.

The preparation method of the modified rubber is as follows: crushing the waste tire to obtain waste tire rubber powder; according to the mass ratio, the waste tire rubber powder: terminal hydroxyl polybutadiene HTPB: PEG-4 trimethylolpropane distearate: β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester: PEG-40 anhydrous sorbitan full oleate: sillimanite powder = 110:3:2:5:1:8, the waste tire rubber powder, terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester, PEG-40 anhydrous sorbitan full oleate, and sillimanite powder with a particle size range of less than 500 μm are mixed, kneaded at 150° C., extruded, and crushed to obtain a granular modified rubber with a particle size range of 1 mm to 3 mm.

The method for preparing the above-mentioned concrete material containing modified rubber material comprises the following steps:

S1: According to the mass fraction, heat-melt 90# road petroleum asphalt at 165℃ and set aside;

S2: Coarse aggregate, fine aggregate and modified rubber are mixed according to mass proportions; then polyacrylate emulsion and hot-melt 90# road petroleum asphalt are added and mixed evenly at a mixing temperature of 165° C. to obtain concrete material.

Example 2

A concrete material containing modified rubber material, the concrete material comprises the following raw materials in parts by mass: 100 parts of coarse aggregate, 60 parts of fine aggregate, 15 parts of 90# road petroleum asphalt, 20 parts of modified rubber and 3 parts of polyacrylate emulsion; the modified rubber is a waste tire rubber powder which is mixed with terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol, PEG-40 dehydrated sorbitan full oleate and sillimanite powder to obtain the modified rubber.

The coarse aggregate is a mixture of limestone, diabase and basalt in equal mass ratios; the particle size of the coarse aggregate ranges from 5mm to 20mm. The fine aggregate is limestone; the particle size of the fine aggregate ranges from 0.1mm to 3mm.

The preparation method of the modified rubber is as follows: crushing the waste tire to obtain waste tire rubber powder; according to the mass ratio, the waste tire rubber powder: terminal hydroxyl polybutadiene HTPB: PEG-4 trimethylolpropane distearate: β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester: PEG-40 anhydrous sorbitan full oleate: sillimanite powder = 100:2:0.5:3:0.5:5, the waste tire rubber powder, terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester, PEG-40 anhydrous sorbitan full oleate, and sillimanite powder with a particle size range of less than 500 μm are mixed, kneaded at 140° C., extruded, and crushed to obtain a granular modified rubber with a particle size range of 1 mm to 3 mm.

The method for preparing the above-mentioned concrete material containing modified rubber material comprises the following steps:

S1: According to the mass fraction, heat-melt 90# road petroleum asphalt at 160℃ and set aside;

S2: Coarse aggregate, fine aggregate and modified rubber are mixed according to mass proportions; then polyacrylate emulsion and hot-melt 90# road petroleum asphalt are added and mixed evenly at a mixing temperature of 160° C. to obtain concrete material.

Example 3

A concrete material containing modified rubber material, the concrete material comprises the following raw materials in parts by mass: 150 parts of coarse aggregate, 90 parts of fine aggregate, 30 parts of 90# road petroleum asphalt, 30 parts of modified rubber and 5 parts of polyacrylate emulsion; the modified rubber is a waste tire rubber powder which is mixed with terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl ester, PEG-40 dehydrated sorbitan full oleate and sillimanite powder to obtain the modified rubber.

The coarse aggregate is limestone, and the particle size of the coarse aggregate is 5 mm to 20 mm. The fine aggregate is diabase, and the particle size of the fine aggregate is 0.1 mm to 3 mm.

The preparation method of the modified rubber is as follows: crushing the waste tire to obtain waste tire rubber powder; according to the mass ratio, the waste tire rubber powder: terminal hydroxyl polybutadiene HTPB: PEG-4 trimethylolpropane distearate: β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester: PEG-40 anhydrous sorbitan full oleate: sillimanite powder = 120:5:3:6:2:10, the waste tire rubber powder, terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester, PEG-40 anhydrous sorbitan full oleate, and sillimanite powder with a particle size range of less than 500 μm are mixed, kneaded at 160° C., extruded, and crushed to obtain a granular modified rubber with a particle size range of 1 mm to 3 mm.

The method for preparing the above-mentioned concrete material containing modified rubber material comprises the following steps:

S1: According to the mass fraction, heat-melt 90# road petroleum asphalt at 170℃ and set aside;

S2: Coarse aggregate, fine aggregate and modified rubber are mixed according to mass proportions; then polyacrylate emulsion and hot-melt 90# road petroleum asphalt are added and mixed evenly at a mixing temperature of 170° C. to obtain concrete material.

Example 4

A concrete material containing modified rubber material, the concrete material comprises the following raw materials in parts by mass: 100 parts of coarse aggregate, 90 parts of fine aggregate, 15 parts of 90# road petroleum asphalt, 30 parts of modified rubber and 3 parts of polyacrylate emulsion; the modified rubber is a waste tire rubber powder which is mixed with terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol, PEG-40 dehydrated sorbitan full oleate and sillimanite powder to obtain the modified rubber.

The coarse aggregate is diabase, and the particle size of the coarse aggregate is 5 mm to 20 mm. The fine aggregate is limestone, and the particle size of the fine aggregate is 0.1 mm to 3 mm.

The preparation method of the modified rubber is as follows: crushing the waste tire to obtain the waste tire rubber powder; according to the mass ratio, the waste tire rubber powder: terminal hydroxyl polybutadiene HTPB: PEG-4 trimethylolpropane distearate: β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester: PEG-40 anhydrous sorbitan full oleate: sillimanite powder = 120:2:3:3:2:5, the waste tire rubber powder, terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester, PEG-40 anhydrous sorbitan full oleate, and sillimanite powder with a particle size range of less than 500 μm are mixed, kneaded at 160° C., extruded, and crushed to obtain a granular modified rubber with a particle size range of 1 mm to 3 mm.

The method for preparing the above-mentioned concrete material containing modified rubber material comprises the following steps:

S1: According to the mass fraction, heat-melt 90# road petroleum asphalt at 160℃ and set aside;

S2: Coarse aggregate, fine aggregate and modified rubber are mixed according to mass proportions; then polyacrylate emulsion and hot-melt 90# road petroleum asphalt are added and mixed evenly at a mixing temperature of 170° C. to obtain concrete material.

Example 5

A concrete material containing modified rubber material, the concrete material comprises the following raw materials in parts by mass: 150 parts of coarse aggregate, 60 parts of fine aggregate, 30 parts of 90# road petroleum asphalt, 20 parts of modified rubber and 5 parts of polyacrylate emulsion; the modified rubber is a waste tire rubber powder which is mixed with terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol, PEG-40 dehydrated sorbitan full oleate and sillimanite powder to obtain the modified rubber.

The coarse aggregate is basalt, and the particle size of the coarse aggregate ranges from 5 mm to 20 mm. The fine aggregate is a mixture of limestone and diabase in equal mass ratio, and the particle size of the fine aggregate ranges from 0.1 mm to 3 mm.

The preparation method of the modified rubber is as follows: crushing the waste tire to obtain waste tire rubber powder; according to the mass ratio, the waste tire rubber powder: terminal hydroxyl polybutadiene HTPB: PEG-4 trimethylolpropane distearate: β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester: PEG-40 anhydrous sorbitan full oleate: sillimanite powder = 100:5:0.5:6:0.5:10, the waste tire rubber powder, terminal hydroxyl polybutadiene HTPB, PEG-4 trimethylolpropane distearate, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester, PEG-40 anhydrous sorbitan full oleate, and sillimanite powder with a particle size range of less than 500 μm are mixed, kneaded at 140° C., extruded, and crushed to obtain a granular modified rubber with a particle size range of 1 mm to 3 mm.

The method for preparing the above-mentioned concrete material containing modified rubber material comprises the following steps:

S1: According to the mass fraction, heat-melt 90# road petroleum asphalt at 170℃ and set aside;

S2: Coarse aggregate, fine aggregate and modified rubber are mixed according to mass proportions; then polyacrylate emulsion and hot-melt 90# road petroleum asphalt are added and mixed evenly at a mixing temperature of 160° C. to obtain concrete material.

Preparation Comparative Example 1

The modified rubber is replaced by waste tire rubber powder; other parameters and steps are the same as in Example 1.

Preparation Comparative Example 2

When the modified rubber is mixed and modified, no hydroxyl-terminated polybutadiene HTPB is added; other parameters and steps are the same as in Example 1.

Preparation Comparative Example 3

During the mixing and modification of the modified rubber, PEG-4 trimethylolpropane distearate and PEG-40 sorbitan full oleate were not added; other parameters and steps were the same as those in Example 1.

Preparation Comparative Example 4

During the mixing and modification of the modified rubber, β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol and sillimanite powder were not added; other parameters and steps were the same as those in Example 1.

The concrete materials of the above-mentioned embodiments and the concrete materials of the comparative examples were tested.

According to the "Highway Engineering Asphalt and Asphalt Mixture Test Code" JTGE20-2011, the concrete was subjected to rutting test, Marshall stability test, freeze-thaw splitting test and water immersion residual stability test. The test results are shown in Table 1 below:

Table 1 Test results

From the above results, it can be seen that the concrete of Examples 1 to 6 has better rutting resistance, crack resistance, water resistance and wear resistance, and has good road surface stability; that is, the modified rubber can provide good mechanical properties and water resistance, and is not easy to crack and pulverize. From the comparative example results, it can be seen that when the modified rubber is mixed and modified, the addition of terminal hydroxyl polybutadiene HTPB can improve the adhesion, improve the rutting resistance and crack resistance of the concrete, and then improve the water resistance and wear resistance; PEG-4 trimethylolpropane distearate and PEG-40 dehydrated sorbitan full oleate are used in combination to improve the homogeneity of rubber mixing and improve the mixing fusion of each component, especially the mixing compatibility between waste rubber and β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester and sillimanite powder, achieving a good homogenization effect, thereby improving indicators such as rutting resistance, crack resistance, water resistance and wear resistance; β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester and sillimanite powder. The combination of tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester and sillimanite powder can improve the strength, oxidation resistance and crack resistance of the modified rubber. The sillimanite powder also has the effect of improving wear resistance, has good anti-rutting and crack resistance effects, and is not easy to crack and pulverize. In addition, during the high-temperature mixing process of concrete, the modified rubber is mixed with asphalt, and the components in the modified rubber can improve the performance of asphalt, including crack resistance, water resistance and wear resistance, etc., and comprehensively improve various properties of concrete. It can achieve a large amount of waste tire rubber powder without reducing the performance of the road surface, ensuring that the service life is not shortened, and can achieve the mixed use effect of high-quality rubber.

Claims (8)

1. The concrete material containing the modified rubber material is characterized by comprising the following raw materials in parts by weight: 100 to 150 parts of coarse aggregate, 60 to 90 parts of fine aggregate, 15 to 30 parts of 90# road petroleum asphalt, 20 to 30 parts of modified rubber and 3 to 5 parts of polyacrylate emulsion; the modified rubber is obtained by mixing waste tire rubber powder with hydroxyl-terminated polybutadiene HTPB, PEG-4 trimethylolpropane distearate, beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, PEG-40 sorbitan monooleate and sillimanite powder;

The preparation method of the modified rubber comprises the following steps: crushing the waste tires to obtain waste tire rubber powder; the mass ratio of the waste tire rubber powder is as follows: hydroxyl-terminated polybutadiene HTPB: PEG-4 trimethylolpropane distearate: stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate: PEG-40 sorbitan monooleate: sillimanite powder= (100-120): (2-5): (0.5-3): (3-6): (0.5-2): (5-10), mixing waste tire rubber powder, hydroxyl-terminated polybutadiene HTPB, PEG-4 trimethylolpropane distearate, beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, PEG-40 sorbitan monooleate and sillimanite powder, mixing at 140-160 ℃, extruding, crushing, and obtaining granular modified rubber.

2. The concrete material according to claim 1, wherein the sillimanite powder has a particle size range of 500 μm or less.

3. The concrete material according to claim 1, wherein the particle size of the modified rubber is in the range of 1mm to 3mm.

4. The concrete material of claim 1, wherein the coarse aggregate is one or more of limestone, diabase, and basalt; the granularity range of the coarse aggregate is 5 mm-20 mm.

5. The concrete material according to claim 1, wherein the fine aggregate is one or a combination of two of limestone and diabase; the granularity range of the fine aggregate is 0.1 mm-3 mm.

6. A method of preparing a concrete material as claimed in claim 1, characterized in that the method comprises the steps of:

s1: according to the parts by weight, carrying out hot melting on 90# road petroleum asphalt for standby;

S2: mixing coarse aggregate, fine aggregate and modified rubber according to the parts by weight; and then adding polyacrylate emulsion and hot-melt 90# road petroleum asphalt to uniformly mix to obtain the concrete material.

7. The method for producing a concrete material according to claim 6, wherein in S1, the temperature of the hot melt is 160 ℃ to 170 ℃.

8. The method for preparing a concrete material according to claim 6, wherein in S2, the mixing temperature is 160 ℃ to 170 ℃.