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Red mud desalted sea sand AC-16 asphalt mixture and preparation method thereof

A technology of asphalt mixture and sea sand, which is applied in the field of building materials, can solve the problems of low utilization rate, inability to alleviate the heavy burden of red mud, and low added value of products, so as to achieve convenient material acquisition, environmental protection and land occupation problems, and improve utilization value effect

Active Publication Date: 2020-12-01
广西路建集团建筑工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the huge discharge of red mud, the limited utilization rate still cannot alleviate the heavy burden brought by red mud to the society and the environment.
There are hundreds of millions of tons of red mud stacked in the open air in our country, and only some of them are currently used for brick making, paving and cement mixture, but their utilization rate is low and the added value of products is low; therefore, it is urgent to improve the utilization rate and value of red mud , realize multi-channel, large-scale resource utilization, and minimize red mud stockpiling and hazards

Method used

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  • Red mud desalted sea sand AC-16 asphalt mixture and preparation method thereof
  • Red mud desalted sea sand AC-16 asphalt mixture and preparation method thereof
  • Red mud desalted sea sand AC-16 asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First, desalinated sea sand is produced by the following process.

[0032] Specifically, the purchased sea sand is piled up; the sea sand that is piled up is desalinated, that is, washed with water, dried, and passed through a 2.36mm sieve to obtain sea sand with a particle size range of 0-2mm; the obtained sea sand The mass percentages passing through the following sieves are shown in Table 2.

[0033]

[0034] Then, the red mud with the indicators listed in Table 3 is used.

[0035]

[0036] The asphalt used is 70#A grade road asphalt, with a penetration of 73 (0.1mm), a softening point of 50°C, and a ductility of 116cm at 15°C.

[0037] The 1# gravel (particle size 10mm-20mm), 2# gravel (particle size 5mm-10mm) and 3# gravel (particle size 2mm-5mm) used are all limestone gravel, and the apparent density is 2.722g in turn. / cm 3 , 2.729g / cm 3 : 2.697g / cm 3 , and its grading range is shown in Table 1.

[0038] Finally, according to the mass percentage, take 4...

Embodiment 2

[0041] The performance of each raw material used in Example 2 is consistent with that described in Example 1. The difference between Example 2 and Example 1 is that the mass percentage of each raw material component used in this example is 3.7% red mud, 25.4% of desalinated sea sand with particle size of 0-2mm, 15.3% of 3# crushed stone, 13.6% of 2# crushed stone, 38.1% of 1# crushed stone; Mix #crushed stone, 2# crushed stone and 1# crushed stone evenly, and heat to 165°C to prepare the mixed material;

[0042] In order to verify the road performance of the above mixed material, the optimal asphalt ratio was determined by Marshall compaction test, and 70#A grade road with a mass percentage of 3.9% and a temperature of 155-160°C was added to the prepared mixed material The asphalt was mixed to obtain the desalinated red mud sea sand AC-16 asphalt mixture, and the same measurement method as in Example 1 was used to measure the red mud desalinated sea sand AC-16 asphalt mixture ...

Embodiment 3

[0044] The performance of each raw material used in Example 3 is consistent with that described in Example 1. The difference between Example 3 and Example 1 is that the mass percentage of each raw material component used in this example is 4.5% red mud, 22.3% of desalinated sea sand with a particle size of 0-2mm, 17.3% of 3# crushed stone, 10.1% of 2# crushed stone, 41.6% of 1# crushed stone; Mix #crushed stone, 2# crushed stone and 1# crushed stone evenly, and heat to 165°C to prepare the mixed material;

[0045] In order to verify the road performance of the above mixture, the optimum asphalt content (4.2%) determined by the Marshall compaction test was added to the mixture prepared above with 70# A-grade road asphalt was mixed to obtain red mud desalinated sea sand AC-16 asphalt mixture, and the red mud desalinated sea sand AC-16 asphalt mixture of the present embodiment was measured by the same measurement method as in Example 1. The measurement results are shown in Table...

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Abstract

The invention belongs to the technical field of building materials. The invention relates to a red mud desalted sea sand AC-16 asphalt mixture and a preparation method thereof. The raw material components are uniformly mixed and comprise, by mass, 3.7%-5.4% of red mud, 3.7%-5.4% of asphalt, 22.3%-28.8% of desalted sea sand (with the particle size of 0 mm to 2 mm), 13.4%-17.3% of 3# gravel (with the particle size of 2 mm to 5 mm), 8.9%-13.9% of 2# gravel (with the particle size of 5 mm to 10 mm) and 35.4%-41.6% of 1# gravel (with the particle size of 10 mm to 20 mm). The invention further discloses a preparation method of the red mud desalted sea sand AC-16 asphalt mixture. The red mud desalted sea sand AC-16 asphalt mixture disclosed by the invention has the characteristics of being convenient in material taking, energy-saving and environment-friendly, and is a novel building material, a large amount of red mud and sea sand are utilized, the problems of environmental protection and land occupation of the red mud can be solved, increasingly scarce river sand resources can be relieved, the river sand market is stabilized, the application range of the red mud and the sea sand is expanded, and the red mud-sea sand composite material has far-reaching influence and wide application prospects. The pavement performance indexes meet the standard requirements, and the material cost of the AC-16 asphalt mixture can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a red mud desalinated sea sand AC-16 asphalt mixture and a preparation method thereof. Background technique [0002] Sand is also called concrete fine aggregate, which is a necessary material for construction projects; salvaging river sand for construction aggregate production is a traditional method in my country. River sand often contains more mud and needs to be washed and dried for dry powder Mortar; as my country's economy continues to take off today, the demand for sand and gravel aggregates is naturally increasing; river sand can no longer meet the construction requirements of my country's rapid development. Every year, my country's infrastructure construction requires hundreds of billions of tons of sand, causing "green mountains to hang white and rivers to turn yellow", which seriously affects my country's ecological environment. In order to protect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B18/04C04B14/06
CPCC04B26/26C04B18/0409C04B14/068C04B18/12Y02W30/91
Inventor 张立明江羽习赵武裴润先李臣光蒋昌盛张媛媛
Owner 广西路建集团建筑工程有限公司
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