CN103044936A - Gangue asphalt modifier, modified asphalt mixture, and preparation methods of gangue asphalt modifier and modified asphalt mixture - Google Patents
Gangue asphalt modifier, modified asphalt mixture, and preparation methods of gangue asphalt modifier and modified asphalt mixture Download PDFInfo
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- CN103044936A CN103044936A CN2013100086296A CN201310008629A CN103044936A CN 103044936 A CN103044936 A CN 103044936A CN 2013100086296 A CN2013100086296 A CN 2013100086296A CN 201310008629 A CN201310008629 A CN 201310008629A CN 103044936 A CN103044936 A CN 103044936A
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Abstract
The invention relates to a highway asphalt material technique, and discloses a gangue asphalt modifier, a modified asphalt mixture and preparation methods of the gangue asphalt modifier and the modified asphalt mixture. The gangue asphalt modifier comprises the following components by weight percentage: 70-90% of activated gangue powder, 10-20% of quick lime, and 10-20% of natural brucite fiber. The modified asphalt mixture is characterized in that the modified asphalt mixture comprises the following components in parts by weight: 5-8 parts of gangue asphalt modifier, 4-6 parts of asphalt and 88-92 parts of aggregate. The gangue asphalt modifier can obviously improve high-temperature stability, low-temperature cracking resistance and water stability of the asphalt mixture, can effectively prevent and control early diseases of a pavement, and can prolong the service life of an asphalt pavement; in addition, the gangue asphalt modifier is prepared by taking gangue as a main raw material, full use of industrial residues is facilitated, and the highway construction cost is lowered, so that higher economic and social benefits can be obtained.
Description
Technical field
The present invention relates to the highway asphalt material technology, particularly a kind of coal gangue asphalt modifier, modified asphalt mixture and preparation method thereof.
Background technology
At present, Asphalt Pavement of Highway is under the acting in conjunction of traffic loading and physical environment, the early diseases such as high temperature rut, cold cracking and Moisture Damage take place frequently, and failure mechanism is more complicated, cause the using character of bituminous pavement to descend, the lost of life also increases the asphalt pavement maintenance maintenance cost greatly.In recent years, bituminous pavement new texture, novel process, novel material continue to bring out, and the research level of bituminous pavement and technology application level have also reached higher level, and wherein the development of modified asphalt technology is attracted attention the most.The polymer modified asphalts such as well-known SBS and SBR obtain using very widely in High Grade Bitumen Pavement with its excellent performance, but have also increased considerably the Bituminous Pavement Construction cost simultaneously.Therefore, based on China's national situation, be Resources for construction saving type high-grade highway, explore and study the asphalt modification technology that cost performance is relatively high, can have to the bituminous pavement using character good improvement effect and adaptation Heavy Traffic demand, have undoubtedly certain realistic meaning and use value.
Propelling along with China's process of industrialization, energy structure take coal as main Types can not change within the quite a long time, and the quantum of output of coal gangue generally accounts for about 15% ~ 20% of coal production, so coal gangue has become one of industrial solid castoff of China's quantity discharged and accumulating amount maximum.The accumulation of a large amount of coal gangues has produced many adverse influences to environment, as takies a large amount of soils, affects natural landscape, also can cause atmosphere, and soil and water pollutes, even causes the generation of geologic hazard.China has begun to pay attention to the comprehensive utilization of coal gangue in recent years, but aggregate level is not ideal enough, and therefore comprehensive utilization ratio less than 20%, is carried out activity excitation and building resource recycling to coal gangue and also had very large research space.
At present, coal gangue building resource recycling field relates to industry and building trade both at home and abroad, mainly concentrates on the cement building material aspect, yet there are no the related data introduction for preparing asphalt modifier take coal gangue as main raw material(s).
Summary of the invention
One object of the present invention is to provide a kind of coal gangue asphalt modifier and preparation method thereof, and another purpose is to provide modified asphalt mixture that adds above-mentioned coal gangue asphalt modifier and preparation method thereof.The method can solve motorway early disease problem, and in conjunction with coal gangue building resource recycling present situation, take coal gangue as main raw material, Effective Raise asphalt over-all properties, make it not be prone to hot car rut, cold cracking and Moisture Damage, and can fully ensure Pavement Condition and traffic safety.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
(1) a kind of coal gangue asphalt modifier is characterized in that, comprises the component of following weight percent: activated coal gangue powder 70% ~ 90%, unslaked lime 10% ~ 20%, natural brucite fiber 10% ~ 20%.
Preferably, described natural brucite fiber is 7 grades of fibers.
Preferably, described unslaked lime fineness is less than 200 orders.
Preferably, described activated coal gangue powder is: got the coal gangue powder in 4 ~ 6 hours with putting into the ball mill fine grinding after the fragmentation of former lumped coal spoil; The water glass of modulus 0.7 ~ 1.3 is added in the coal gangue powder again and mixes thoroughly, addition is quality 4% ~ 7%, fine grinding after 1 ~ 2 hour 600 ~ 750 ℃ of calcinings and be incubated 6 ~ 8 hours; Then, gained after grinding was processed in 2 ~ 4 hours again behind the chilling in the water.
(2) preparation method of above-mentioned coal gangue asphalt modifier is characterized in that, may further comprise the steps: at first, with putting into the ball mill fine grinding 4 ~ 6 hours after the fragmentation of the former lumped coal spoil of former lumped coal spoil, get the coal gangue powder; The water glass of modulus 0.7 ~ 1.3 is added in the coal gangue powder again and mixes thoroughly, addition is coal gangue powder quality 4% ~ 8%, fine grinding 600 ~ 750 ℃ of calcinings and be incubated 6 ~ 8 hours after 1 ~ 2 hour; Then, grinding 2 ~ 4 hours again behind the chilling gets activated coal gangue powder in the water; At last, mix after taking by weighing by weight percentage activated coal gangue powder, brucite fiber and unslaked lime, the compound grinding to less than 200 purpose powder, and be get final product.
(3) a kind of modified asphalt mixture is characterized in that, comprises the component of following weight part: the coal gangue asphalt modifier in 5 ~ 8 parts of technique scheme, 4 ~ 6 parts of pitch and 88 ~ 92 parts gather materials.
(4) preparation method of above-mentioned modified asphalt mixture is characterized in that, at first with heated bitumen and the uniform mixing in mixing building of gathering materials, adds the uniform mixing of coal gangue asphalt modifier again, gets final product.
Technical scheme of the present invention has following outstanding advantages and significant beneficial effect: (1) coal gangue asphalt modifier of the present invention, starting material are (70% ~ 90%) take coal gangue as main raw material(s), can utilize one of the industrial solid castoff of China's quantity discharged and accumulating amount maximum coal gangue, reduce the road construction cost, have higher economic benefit and social benefit.(2) among the coal gangue asphalt modifier preparation method of the present invention, adopt water glass in earlier stage to process the coal gangue powder, reduced the calcined coal gangue temperature, its calcining temperature is 600 ~ 750 ℃, and other thermal activation calcined coal gangue temperature are greater than 750 ℃.Like this, reduced the calcined coal gangue cost.(3) coal gangue asphalt modifier of the present invention adds in the asphalt, when significantly improving stability at high temperature of asphalt mixture, has improved low-temperature performance and the anti-water damage ability of rubber cement, has realized the high low temperature unity of contradictions of asphalt.The high temperature rut dynamic stability of modified asphalt mixture of the present invention, low temperature be curved to pull open bad strain and freeze thawing Ratio of split strength test-results up to 2265 times/mm, 2939 μ ε and 92%; And under identical proportioning condition, do not adopt that warm rut dynamic stability, the low temperature of benchmark asphalt of the present invention is curved to pull open bad strain and freeze thawing Ratio of split strength test-results only is 1872 times/mm, 2425 μ ε and 83%, amplification is respectively 21.0%, 21.2% and 10.8%.
Embodiment
Below by embodiment the present invention is done further and to illustrate; these preferred embodiments also do not limit the present invention in any way; under the prerequisite that does not deviate from the technology of the present invention solution, any change or change that those of ordinary skills that the present invention is made realize easily all fall within the claim protection domain of the present invention.
Embodiment 1
(1) with putting into the ball mill fine grinding 5 hours after the fragmentation of the former lumped coal spoil of former lumped coal spoil, gets the coal gangue powder; The water glass of modulus 1.0 is added in the coal gangue powder again and mixes thoroughly, addition is coal gangue powder quality 7%, and fine grinding is put into resistance furnace 700 ℃ of calcinings after 2 hours, be incubated 7 hours, and grinding 3 hours again behind the chilling makes activated coal gangue powder in the water.
(2) activated coal gangue powder 70%, brucite fiber 20% and the unslaked lime 10% that step (1) are prepared mix and obtain compound, and the compound grinding to less than 200 purpose powder, is namely obtained the coal gangue asphalt modifier.
(3) be Kelamayi A-70 number 150 ℃ of heated bitumen of 5 parts and 90 parts the uniform mixing in mixing building of gathering materials with weight part, add again 5 parts coal gangue asphalt modifier uniform mixing, make modified asphalt mixture.Modified asphalt mixture test grating adopts AC-13C.The anti-rut performance of high temperature, crack resistance at low-temperature and the anti-water damage property of test modified asphalt mixture.
The high temperature rut dynamic stability of this modified asphalt mixture, low temperature be curved to pull open bad strain and freeze thawing Ratio of split strength test-results up to 2265 times/mm, 2939 μ ε and 92%; And under identical proportioning condition, do not add that high temperature rut dynamic stability, the low temperature of coal gangue asphalt modifier benchmark asphalt is curved to pull open bad strain and freeze thawing Ratio of split strength test-results only is 1872 times/mm, 2425 μ ε and 83%, amplification is respectively 21.0%, 21.2% and 10.8%.
Embodiment 2
(1) with putting into the ball mill fine grinding 4 hours after the fragmentation of the former lumped coal spoil of former lumped coal spoil, gets the coal gangue powder; The water glass of modulus 1.3 is added in the coal gangue powder again and mixes thoroughly, addition is coal gangue powder quality 4%, and fine grinding is put into resistance furnace 750 ℃ of calcinings after 2 hours, be incubated 6 hours, and grinding 4 hours again behind the chilling makes activated coal gangue powder in the water.
(2) activated coal gangue powder 80%, brucite fiber 10% and the unslaked lime 10% that step (1) are prepared mix and obtain compound, and the compound grinding to less than 200 purpose powder, is namely obtained the coal gangue asphalt modifier.
(3) be Kelamayi A-70 number 170 ℃ of heated bitumen of 4 parts and 88 parts the uniform mixing in mixing building of gathering materials with weight part, add again 8 parts coal gangue asphalt modifier uniform mixing, make modified asphalt mixture.Modified asphalt mixture test grating adopts AC-13C.The anti-rut performance of high temperature, crack resistance at low-temperature and the anti-water damage property of test modified asphalt mixture.
The high temperature rut dynamic stability of this modified asphalt mixture, low temperature be curved to pull open bad strain and freeze thawing Ratio of split strength test-results up to 2322 times/mm, 2871 μ ε and 90%; And under identical proportioning condition, do not add that high temperature rut dynamic stability, the low temperature of coal gangue asphalt modifier benchmark asphalt is curved to pull open bad strain and freeze thawing Ratio of split strength test-results only is 1872 times/mm, 2425 μ ε and 83%, amplification is respectively 24.0%, 18.4% and 8.4%.
Embodiment 3
(1) with putting into the ball mill fine grinding 6 hours after the fragmentation of the former lumped coal spoil of former lumped coal spoil, gets the coal gangue powder; The water glass of modulus 0.7 is added in the coal gangue powder again and mixes thoroughly, addition is coal gangue powder quality 4%, and fine grinding is put into resistance furnace 650 ℃ of calcinings after 1 hour, be incubated 8 hours, and grinding 2 hours again behind the chilling makes activated coal gangue powder.
(2) activated coal gangue powder 70%, brucite fiber 10% and the unslaked lime 20% that step (1) are prepared mix and obtain compound, and the compound grinding to less than 200 purpose powder, is namely obtained the coal gangue asphalt modifier.
(3) be Kelamayi A-70 number 160 ℃ of heated bitumen of 6 parts and 91 parts the uniform mixing in mixing building of gathering materials with weight part, add again 5 parts coal gangue asphalt modifier uniform mixing, make modified asphalt mixture.Modified asphalt mixture test grating adopts AC-13C.The anti-rut performance of high temperature, crack resistance at low-temperature and the anti-water damage property of test modified asphalt mixture.
The high temperature rut dynamic stability of this modified asphalt mixture, low temperature be curved to pull open bad strain and freeze thawing Ratio of split strength test-results up to 2415 times/mm, 2745 μ ε and 87%; And under identical proportioning condition, do not add that high temperature rut dynamic stability, the low temperature of coal gangue asphalt modifier benchmark asphalt is curved to pull open bad strain and freeze thawing Ratio of split strength test-results only is 1872 times/mm, 2425 μ ε and 83%, amplification is respectively 29.0%, 13.2% and 6.0%.
From above-described embodiment as can be known, after the coal gangue asphalt modifier of the present invention's preparation is used for asphalt, can obviously improve high-temperature stability, low-temperature cracking-resistance and the water stability of asphalt, comprehensively improve Asphalt Mixture Performance.
Claims (7)
1. a coal gangue asphalt modifier is characterized in that, comprises the component of following weight percent: activated coal gangue powder 70% ~ 90%, unslaked lime 10% ~ 20%, natural brucite fiber 10% ~ 20%.
2. coal gangue asphalt modifier according to claim 1 is characterized in that, described natural brucite fiber is 7 grades of fibers.
3. coal gangue asphalt modifier according to claim 1 is characterized in that, described unslaked lime fineness is less than 200 orders.
4. coal gangue asphalt modifier according to claim 1 is characterized in that, described activated coal gangue powder is: got the coal gangue powder in 4 ~ 6 hours with putting into the ball mill fine grinding after the fragmentation of former lumped coal spoil; The water glass of modulus 0.7 ~ 1.3 is added in the coal gangue powder again and mixes thoroughly, addition is quality 4% ~ 7%, fine grinding after 1 ~ 2 hour 600 ~ 750 ℃ of calcinings and be incubated 6 ~ 8 hours; Then, gained after grinding was processed in 2 ~ 4 hours again behind the chilling in the water.
5. the preparation method of coal gangue asphalt modifier according to claim 1 is characterized in that, may further comprise the steps: at first, with putting into the ball mill fine grinding 4 ~ 6 hours after the fragmentation of the former lumped coal spoil of former lumped coal spoil, get the coal gangue powder; The water glass of modulus 0.7 ~ 1.3 is added in the coal gangue powder again and mixes thoroughly, addition is coal gangue powder quality 4% ~ 8%, fine grinding 600 ~ 750 ℃ of calcinings and be incubated 6 ~ 8 hours after 1 ~ 2 hour; Then, grinding 2 ~ 4 hours again behind the chilling gets activated coal gangue powder in the water; At last, mix after taking by weighing by weight percentage activated coal gangue powder, brucite fiber and unslaked lime, the compound grinding to less than 200 purpose powder, and be get final product.
6. a modified asphalt mixture is characterized in that, comprises the component of following weight part: 5 ~ 8 parts of coal gangue asphalt modifiers claimed in claim 1,4 ~ 6 parts of pitch and 88 ~ 92 parts gather materials.
7. the preparation method of modified asphalt mixture according to claim 5 is characterized in that, at first with heated bitumen and the uniform mixing in mixing building of gathering materials, adds the uniform mixing of coal gangue asphalt modifier again, gets final product.
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Cited By (4)
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| CN103483835A (en) * | 2013-09-09 | 2014-01-01 | 长安大学 | Asphalt modifier and modified asphalt mixture as well as preparation methods thereof |
| CN110078415A (en) * | 2018-01-26 | 2019-08-02 | 天津壹鸣环境污染治理有限公司 | A kind of domestic garbage incineration flyash base asphalt modifier, modified asphalt mixture and preparation method thereof |
| CN112227139A (en) * | 2020-10-23 | 2021-01-15 | 重庆交通职业学院 | Coal gangue asphalt mixture |
| CN114230247A (en) * | 2021-12-21 | 2022-03-25 | 中建五局土木工程有限公司 | High-performance nanofiber machine-made sand concrete and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103483835A (en) * | 2013-09-09 | 2014-01-01 | 长安大学 | Asphalt modifier and modified asphalt mixture as well as preparation methods thereof |
| CN103483835B (en) * | 2013-09-09 | 2015-10-21 | 长安大学 | A kind of asphalt modifier, modified asphalt mixture and preparation method thereof |
| CN110078415A (en) * | 2018-01-26 | 2019-08-02 | 天津壹鸣环境污染治理有限公司 | A kind of domestic garbage incineration flyash base asphalt modifier, modified asphalt mixture and preparation method thereof |
| CN112227139A (en) * | 2020-10-23 | 2021-01-15 | 重庆交通职业学院 | Coal gangue asphalt mixture |
| CN114230247A (en) * | 2021-12-21 | 2022-03-25 | 中建五局土木工程有限公司 | High-performance nanofiber machine-made sand concrete and preparation method thereof |
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| CN103044936B (en) | 2016-04-06 |
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