CN114573885A - High-performance rubber compound for damping support of highway bridge - Google Patents

High-performance rubber compound for damping support of highway bridge Download PDF

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Publication number
CN114573885A
CN114573885A CN202210052728.3A CN202210052728A CN114573885A CN 114573885 A CN114573885 A CN 114573885A CN 202210052728 A CN202210052728 A CN 202210052728A CN 114573885 A CN114573885 A CN 114573885A
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China
Prior art keywords
rubber
mixing
plasticizer
percent
damping support
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CN202210052728.3A
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徐鹏
苏怀生
井垒
周国荣
高建国
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Jiangsu Guanlian New Materials Technology Co ltd
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Jiangsu Guanlian New Materials Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L7/00Compositions of natural rubber
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/04Bearings; Hinges

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a high-performance rubber compound for a damping support of a highway bridge, which comprises the following components in percentage by weight: 55-61% of raw rubber, 30.5-36.5% of carbon black, 0-3% of plasticizer, 2.5-4.5% of anti-aging agent, 3-5% of other compounding agent and 1.5-2.5% of vulcanization accelerator. The product of the invention has excellent mechanical property, excellent adhesive property and aging property and longer service life.

Description

High-performance rubber compound for highway bridge damping support
Technical Field
The invention relates to rubber, in particular to high-performance rubber compound for a damping support of a highway bridge.
Background
With the increasing living standard, the traffic flow is larger and larger, the road network is densely distributed, and a plurality of large cities build viaducts to relieve traffic pressure. The vibration and noise pollution produced, if not solved in advance, can have a very adverse effect on the inhabitants living in their surrounding areas.
The bridge damping support mainly plays a role in transferring load on a bridge span structure to a pier, and plays a good buffering role in deformation such as displacement, torsion and the like of the bridge span structure, so that the bridge span and the pier are further protected. Early bridge beam supports are felt pad, cork, asbestos, concrete etc. and the quality is difficult to manage and control, and it is also poor to inhale the shake effect.
Generally, the rubber shock mount is formed by alternately stacking a plurality of rubber layers and reinforcing plates in parallel. The reinforced plate can improve the compressive strength of the support and ensure that the support has the rigidity required by load bearing; the rubber layer enables the support to deform under the action of external force and keeps elasticity. Therefore, compared with a rigid support, the rubber shock absorption support can absorb vibration more easily, and reduces the impact action of live load on the bridge span and the bridge pier. Moreover, the rubber shock absorption support has the advantages of sufficient raw material sources, easiness in processing and manufacturing, easiness in assembly, longer service life and capability of reducing maintenance cost.
In recent years, viaducts are continuously built in large cities, the positions of the viaducts are often closer to residential buildings or office buildings, and higher performance requirements are also made on the shock absorption support. In order to meet the market demand, the rubber compound for the high-performance road bridge damping support is urgently needed.
Disclosure of Invention
The invention discloses a high-performance rubber compound for a damping support of a highway bridge and a manufacturing method thereof aiming at the problems.
In order to achieve the purpose, the invention provides the following technical scheme: the rubber compound for the high-performance road bridge damping support comprises the following components in percentage by weight:
55-61% of raw rubber,
30.5 to 36.5 percent of carbon black,
0 to 3 percent of plasticizer,
2.5 to 4.5 percent of anti-aging agent,
3 to 5 percent of other compounding agents,
1.5 to 2.5 percent of vulcanization accelerator;
the other compounding agent is a mixture of zinc oxide, ZEH-DL, phenolic resin and a flow additive;
the flow auxiliary agent comprises at least one or a mixture of several of stearate, stearamide and fatty acid salt in any proportion.
The rubber compound for the high-performance road bridge damping support is prepared by the following preparation method, and the preparation method sequentially comprises the following steps:
(1) preparing materials in the following sequence:
sequentially comprises natural rubber, carbon black, a plasticizer, an anti-aging agent, other accessory ingredients and a vulcanization accelerator;
(2) firstly, mixing, namely putting natural rubber, an anti-aging agent and other ingredients into an internal mixer for mixing for about 50 s; adding N330 carbon black, and mixing for about 60 s; putting a plasticizer and N774 carbon black together, pressing a top plug to carry out banburying, and cleaning the top plug after the temperature reaches 135 ℃; finally, mixing for 50-70s, or discharging and discharging the material after the temperature reaches 145-155 ℃ to prepare the mixed rubber A for later use;
(3) and (3) second mixing, namely adding the vulcanization accelerator into the mixed rubber A, mixing for 60-90 seconds, cleaning, mixing for 30-60 seconds again, and ensuring that the mixed rubber is fully mixed and dispersed and then is discharged for later use.
The raw rubber is natural rubber, and the selected grade is Vietnam SVR 3L. The natural rubber has excellent physical properties, fatigue resistance and dynamic properties, and is the first choice for manufacturing damping products. And the vulcanized product of the natural rubber has better low temperature resistance, and can meet the use requirements in the temperature environment of most domestic areas. If necessary, a certain amount of plasticizer may be added to further improve the low temperature resistance thereof, if necessary for use in an extremely low temperature environment. Compared with smoked sheet glue and granulated glue, the price is low, and the performance difference is not great. To ensure end product batch-to-batch stability, different batches of SVR3L may be co-masticated prior to use.
The carbon blacks are N330 and N774. N330 has higher strength and fatigue resistance, while N774 has better rebound and low hysteresis. The proportion of the two can be flexibly adjusted according to the design requirements of the final product.
The plasticizer is DOA, which is mainly used for further improving the low temperature resistance of the product. The material itself is less compatible with natural rubber than naphthenic oil, and the amount of the material should be controlled.
The anti-aging agent is a mixture of RD, 4030, 4020 and WAX. Natural rubber is rubber with unsaturated main chain, has extremely poor aging resistance, and needs to be matched with a protection system to prolong the service life of the rubber. The combination of RD/4030/4020/WAX can play a synergistic role, and simultaneously improve the hot air aging resistance and ozone aging resistance of the natural rubber, and the ratio of the RD/4030/4020/WAX to the hot air aging resistance to the ozone aging resistance is 1.5:2:2: 2.
The other compounding agent is a mixture of zinc oxide, ZEH-DL, phenolic resin and a flow aid. The creep resistance of the rubber compound can be improved by adding the ZEH-DL, and the service life of the product is prolonged. The phenolic resin can enhance the self-adhesiveness of the compound and the adhesion properties to metal or tetrafluoroethylene sheets.
The vulcanization accelerator is a mixture of S, a thiuram accelerator (TT) and a sulfenamide accelerator (NS).
The invention adopts natural rubber with excellent physical properties and good dynamic fatigue properties as main rubber, and improves the poor aging resistance by matching a protection system. The product in the extremely low temperature application environment can be improved by adding a proper amount of low-molecular plasticizer. In actual production, different batches of natural rubber are blended and plasticated before use, so that the stability of the product is greatly improved. The product of the invention has excellent tensile strength, rebound resilience, low temperature resistance and fatigue performance, can greatly reduce creep deformation generated in the using process, and can meet the use requirement of the high-performance highway bridge damping support.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a high-performance rubber compound for a damping support of a highway bridge, which comprises the following components in percentage by weight:
55-61% of raw rubber,
30.5 to 36.5 percent of carbon black,
0 to 3 percent of plasticizer,
2.5 to 4.5 percent of anti-aging agent,
3 to 5 percent of other compounding agents,
1.5 to 2.5 percent of vulcanization accelerator;
wherein, the other compounding agents are a mixture of zinc oxide, ZEH-DL, phenolic resin and a flow additive;
specifically, the flow aid comprises at least one or a mixture of several of stearate, stearamide and fatty acid salt in any proportion.
Preferably, the raw rubber is natural rubber and the selected trade designation is vietnam SVR 3L. The natural rubber has excellent physical properties, fatigue resistance and dynamic properties, and is the first choice for manufacturing shock absorption products. And the vulcanized product of the natural rubber has better low temperature resistance, and can meet the use requirements in the temperature environment of most domestic areas. If necessary, a plasticizer may be added in an amount to further improve the low temperature resistance thereof, if necessary for use in an extremely low temperature environment. Compared with smoked sheet glue and granulated glue, the price is low, and the performance difference is not large. To ensure end product batch-to-batch stability, different batches of SVR3L may be co-masticated prior to use.
The carbon blacks are N330 and N774. N330 has higher strength and fatigue resistance, while N774 has better rebound and low hysteresis. The proportion of the two can be flexibly adjusted according to the design requirements of the final product.
The plasticizer is DOA, which is mainly used for further improving the low temperature resistance of the product. The material is not compatible with natural rubber, and the dosage of the material is controlled.
The anti-aging agent is a mixture of RD, 4030, 4020 and WAX. Natural rubber is rubber with unsaturated main chain, has extremely poor aging resistance, and needs to be matched with a protection system to prolong the service life of the rubber. The combination of RD/4030/4020/WAX can play a synergistic role, and simultaneously improve the hot air aging resistance and ozone aging resistance of the natural rubber, and the ratio of the RD/4030/4020/WAX to the hot air aging resistance to the ozone aging resistance is 1.5:2:2: 2.
In the present example, the other compounding agent was a mixture of zinc oxide, ZEH-DL, phenolic resin and flow aid. The added ZEH-DL can improve the creep resistance of the rubber compound and is beneficial to prolonging the service life of the product. The phenolic resin can enhance the self-adhesiveness of the compound and the adhesion properties to metal or tetrafluoroethylene sheets.
The vulcanization accelerator is a mixture of S, thiuram accelerator (TT) and sulfenamide accelerator (NS).
The invention also provides a preparation method of the rubber compound for the high-performance road bridge damping support, which comprises the following preparation steps according to the performance requirement characteristics of the formula:
(1) preparing materials in the following sequence:
sequentially comprises natural rubber, carbon black, a plasticizer, an anti-aging agent, other accessory ingredients and a vulcanization accelerator;
(2) firstly, mixing, namely putting natural rubber, an anti-aging agent and other ingredients into an internal mixer for mixing for about 50 s; adding N330 carbon black, and mixing for about 60 s; putting a plasticizer and N774 carbon black together, pressing a top plug to carry out banburying, and cleaning the top plug after the temperature reaches 135 ℃; finally, mixing for 50-70s, or discharging and discharging the material after the temperature reaches 145-155 ℃ to prepare the mixed rubber A for later use;
(3) and (3) second mixing, namely adding the vulcanization accelerator into the mixed rubber A, mixing for 60-90 seconds, cleaning, mixing for 30-60 seconds again, and ensuring that the mixed rubber is fully mixed and dispersed and then is discharged for later use.
Examples 1 to 4
The rubber compound for the high-performance road bridge damping support is manufactured according to the following steps.
And preparing the glue, namely accurately weighing the raw materials in sequence according to the mixture ratio shown in the table 1 and the actual operation multiple of the internal mixer, and standing for later use.
Firstly, mixing, namely firstly putting natural rubber, an anti-aging agent and other ingredients into an internal mixer for mixing for about 50 s; adding N330 carbon black, and mixing for about 60 s; putting a plasticizer and N774 carbon black together, pressing a top plug to carry out banburying, and cleaning the top plug after the temperature reaches 135 ℃; finally, mixing for 50-70s, or discharging and discharging the material after the temperature reaches 145-155 ℃ to prepare the mixed rubber A for later use;
and (3) second mixing, namely adding the vulcanization accelerator into the mixed rubber A, mixing for 60-90 seconds, cleaning, mixing for 30-60 seconds again, and ensuring that the mixed rubber is fully mixed and dispersed and then is discharged for later use.
Table 1 shows the ratios of the components in examples 1 to 4 in terms of their mass fractions. Example 1-1 had a plasticizer added, but not in the remaining examples.
Table 1 shows the ratios of the components in examples 1 to 4 in terms of their mass fractions. Table 2 shows the kneading times of examples 1 to 4.
TABLE 1
Figure 632487DEST_PATH_IMAGE001
TABLE 2
Figure 769070DEST_PATH_IMAGE002
Table 3 shows the properties of the rubber mixtures for high-performance road bridge damping supports prepared in examples 1 to 4.
Table 3 shows the performance parameters of the rubber compounds for high-performance highway bridge damping supports prepared in examples 1-4.
As can be seen from Table 3, the rubber compound for the high-performance road bridge damping support has the following characteristics:
firstly, the invention takes the natural rubber as the main rubber, has excellent mechanical property, the tensile strength obtained by the four embodiments is more than 18MPa, and the tensile strength is higher along with the improvement of the proportion of the natural rubber. The ozone aging resistance and the hot air aging resistance of the four embodiments are within the standard range, and the protection system used by the invention achieves the expected effect. In addition to the excellent material properties, the four examples also have good adhesive properties. The samples of the four embodiments can meet the use requirements of the bridge damping support. In example 1, the addition of a part of plasticizer causes some damage to the tensile strength and the adhesive property, and the amount of plasticizer should be strictly controlled in actual production.
TABLE 3
Figure 375632DEST_PATH_IMAGE003
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. The rubber compound for the high-performance road bridge damping support is characterized by comprising the following components in percentage by weight:
raw rubber: 55-61 percent of the total weight of the mixture,
30.5 to 36.5 percent of carbon black,
0 to 3 percent of plasticizer,
2.5 to 4.5 percent of anti-aging agent,
3 to 5 percent of other compounding agents,
1.5 to 2.5 percent of vulcanization accelerator;
wherein the other compounding agent is a mixture of zinc oxide, ZEH-DL, phenolic resin and a flow aid; the flow auxiliary agent comprises at least one or a mixture of several of stearate, stearamide and fatty acid salt in any proportion; the anti-aging agent is a mixture of RD, 4030, 4020 and WAX, and the ratio of the anti-aging agent to the anti-aging agent is 1.5:2:2: 2; the vulcanization accelerator is a mixture of S, a thiuram accelerator TT and a sulfenamide accelerator NS; the raw rubber is natural rubber, and the selected grade is Vietnam SVR 3L;
the rubber compound for the high-performance road bridge damping support is prepared by the following preparation method, and the preparation method sequentially comprises the following steps:
(1) preparing materials in the following sequence:
sequentially comprises natural rubber, carbon black, a plasticizer, an anti-aging agent, other accessory ingredients and a vulcanization accelerator;
(2) firstly, mixing, namely putting natural rubber, an anti-aging agent and other ingredients into an internal mixer for mixing for about 50 s; adding N330 carbon black, and mixing for about 60 s; putting a plasticizer and N774 carbon black together, pressing a top plug to carry out banburying, and cleaning the top plug after the temperature reaches 135 ℃; finally, mixing for 50-70s, or discharging and discharging the material after the temperature reaches 145-155 ℃ to prepare the mixed rubber A for later use;
(3) and (3) second mixing, namely adding the vulcanization accelerator into the mixed rubber A, mixing for 60-90 seconds, cleaning, mixing for 30-60 seconds again, and ensuring that the mixed rubber is fully mixed and dispersed and then is discharged for later use.
2. The rubber compound for the high-performance road bridge damping support according to claim 1, wherein the raw rubber is natural rubber.
3. The rubber compound for the high-performance road bridge damping support according to claim 1, wherein the carbon black is N330 and N774.
4. The rubber compound for the high-performance road bridge damping support according to claim 1, wherein the plasticizer is DOA (dioctyl phthalate) plasticizer.
CN202210052728.3A 2022-01-18 2022-01-18 High-performance rubber compound for damping support of highway bridge Pending CN114573885A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102226017A (en) * 2011-06-03 2011-10-26 天津市橡胶工业研究所 Rubber used for building shock-isolation support and manufacture method thereof
CN102850601A (en) * 2011-06-27 2013-01-02 太仓冠联高分子材料有限公司 Damping rubber material and its preparation method
CN103102513A (en) * 2013-01-29 2013-05-15 云南震安减震技术有限公司 Shock-insulation support laminated glue composition with less than 0.35 MPa of shear modulus
CN104109265A (en) * 2014-07-21 2014-10-22 无锡伏尔康科技有限公司 Shock-absorption rubber
CN110157050A (en) * 2018-03-15 2019-08-23 陕西永安减震科技有限公司 A kind of vibration isolator rubber bearing ageing-resistant natural rubber material and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102226017A (en) * 2011-06-03 2011-10-26 天津市橡胶工业研究所 Rubber used for building shock-isolation support and manufacture method thereof
CN102850601A (en) * 2011-06-27 2013-01-02 太仓冠联高分子材料有限公司 Damping rubber material and its preparation method
CN103102513A (en) * 2013-01-29 2013-05-15 云南震安减震技术有限公司 Shock-insulation support laminated glue composition with less than 0.35 MPa of shear modulus
CN104109265A (en) * 2014-07-21 2014-10-22 无锡伏尔康科技有限公司 Shock-absorption rubber
CN110157050A (en) * 2018-03-15 2019-08-23 陕西永安减震科技有限公司 A kind of vibration isolator rubber bearing ageing-resistant natural rubber material and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
赵贵新等: "建筑减震橡胶支座胶料最佳硫化温度试验研究" *

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Application publication date: 20220603