Preparation of active nano calcium carbonate composite modified asphalt material

A technology of composite modified asphalt and nano-calcium carbonate, which is applied in building insulation materials, building components, buildings, etc., can solve the problems of high cost of modified asphalt and expensive elastomers, and improve high temperature performance and dynamic stability , Reduce production cost, good compatibility effect

Inactive Publication Date: 2009-07-15
山东海泽纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These modification methods have greatly improved the performance of asphalt, especially SBS, which has become the main product of asphalt modifier due to its excellent comprehensive performance. However, due to the high price of elastomers such as SBR or SBS, especially in recent years with the Rising oil prices lead to significantly higher cost of modified bitumen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Heat 400g of Tepco 70# asphalt at 140°C until it flows completely, then add 16g of SBS (Yanshan Petrochemical 4303) and 20g of active nano calcium carbonate and stir at a low speed for 30 minutes, then add 0.4g of sulfur stabilizer and heat up to 190°C , high-speed shearing for 30 minutes, the composite modified asphalt was obtained, and its properties are shown in Table 1.

Embodiment 2

[0018] Heat 400g of Korean SK70# asphalt at 140°C until it flows completely, then add 16g of SBS (Yanshan Petrochemical 4303) and 12g of active nano calcium carbonate and stir for 30 minutes at low speed, then add 0.4g of sulfur stabilizer and heat up to 190°C, high speed Cut for 30 minutes to obtain composite modified asphalt. Its properties are shown in Table 2.

[0019] Table 2

[0020] Numbering Example 2 Comparative example 2 Asphalt raw material (g) 400 400 SBS(g) 16 16 Active Nano Calcium Carbonate (g) 12 0 Stabilizer (g) 0.4 0.4 Penetration, mm(25℃) 45 49 Penetration index 1.761 1.292 Softening point (℃) 66 62 Ductility, cm(5℃) 24 26 Kinematic viscosity, Pa·s(135℃) 1.71 1.53

Embodiment 3

[0022] Heat 400g of Korean SK70# asphalt at 140°C until it flows completely, then add 16g of SBS (Yanshan Petrochemical 4303) and 20g of active nano calcium carbonate and stir for 30 minutes at low speed, then add 0.4g of sulfur stabilizer and heat up to 190°C, high speed Cut for 30 minutes to obtain composite modified asphalt. Its properties are shown in Table 3.

[0023] table 3

[0024] Numbering Example 3 Comparative example 3 Asphalt raw material (g) 400 400 SBS(g) 16 16 Active Nano Calcium Carbonate (g) 20 0 Stabilizer (g) 0.4 0.4 Penetration, mm(25℃) 43 49 Penetration index 1.781 1.292 Softening point (℃) 69 62 Ductility, cm(5℃) 22 26 Kinematic viscosity, Pa·s(135℃) 1.80 1.53

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Abstract

The invention discloses a method for preparing an active nano calcium carbonate compound modified asphalt material, which comprises the following steps in turn: heating base asphalt to be 120 to 190 DEG C till the base asphalt can fully flow, adding definite amount of SBS and active nano calcium carbonate into the base asphalt, stirring the mixture for 30 minutes at low speed, adding definite amount of stabilizing agent, emulsifying and shearing the mixture for 30 minutes. Based on the prior SBS modified asphalt, the method adds the definite amount of the active nano calcium carbonate as compound modifier. Because the surface of the active nano calcium carbonate is subjected to organic active treatment and has better oleophilic property, the active nano calcium carbonate has better compatibility and dispersion property in the asphalt. The high-temperature property and the dynamic stability of the asphalt can be remarkably improved by adding the definite amount of the active nano calcium carbonate into the modified asphalt; and simultaneously because the active nano calcium carbonate is already subjected to large-scale industrialized production, the cost is relatively low, and the active nano calcium carbonate after adding can lower the production cost of the modified asphalt remarkably.

Description

technical field [0001] The invention relates to a preparation method of modified asphalt material used for road construction. Background technique [0002] Adding polymers to bitumen has been used to improve bitumen properties for decades. For example, US Pat. No. 4,145,322 discloses a method for preparing SBS (ie, styrene butadiene triblock copolymer) modified asphalt. Chinese patent CN1287133A has announced a kind of method that adopts SBR (styrene-butadiene rubber) and SBS compound modified asphalt. These modification methods have greatly improved the performance of asphalt, especially SBS, which has become the main product of asphalt modifier due to its excellent comprehensive performance. However, due to the high price of elastomers such as SBR or SBS, especially in recent years with the The rising price of petroleum has led to a significant increase in the cost of modified asphalt. Therefore, the development of low-cost, high-performance modified asphalt has become ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K9/00C08K3/26C08L53/02
Inventor 李雪冰范娜李振东陈祥芝徐西庆徐铸德
Owner 山东海泽纳米材料有限公司
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