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Red mud desalination 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 added value of products, cannot alleviate the heavy burden of red mud, and low utilization rate, so as to improve the use value, environmental protection and land occupation. convenient effect

Active Publication Date: 2022-06-21
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 desalination sea sand ac-16 asphalt mixture and preparation method thereof
  • Red mud desalination sea sand ac-16 asphalt mixture and preparation method thereof
  • Red mud desalination 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 according to the following process.

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

[0033]

[0034] Then, use the red mud of the indexes listed in Table 3.

[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 used 1# crushed stone (particle size 10mm-20mm), 2# crushed stone (particle size 5mm-10mm) and 3# crushed stone (particle size 2mm-5mm) are limestone crushed stone, and the apparent density is 2.722g in turn / cm 3 , 2.729g / cm 3 : 2.697g / cm 3 , and its gradation ...

Embodiment 2

[0041] The properties of the raw materials used in Example 2 are consistent with those 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% of red mud, The desalinated sea sand with a particle size of 0-2mm is 25.4%, the 3# gravel is 15.3%, the 2# gravel is 13.6%, and the 1# gravel is 38.1%; according to the mass percentage, red mud, desalinated sea sand, 3 # crushed stone, 2# crushed stone and 1# crushed stone are mixed evenly, and heated to 165 ℃ to obtain a mixed material;

[0042] In order to verify the road performance of the above mixture, the optimum oil-stone 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 mixture prepared above. Asphalt is mixed to obtain red mud desalinated sea sand AC-16 asphalt mixture, and the same measurement method as in Example 1 is used to ...

Embodiment 3

[0044] The properties of the raw materials used in Example 3 are consistent with those 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% of red mud, The desalinated sea sand with a particle size of 0-2mm is 22.3%, the 3# gravel is 17.3%, the 2# gravel is 10.1%, and the 1# gravel is 41.6%; first, according to the mass percentage, red mud, desalinated sea sand, 3 # crushed stone, 2# crushed stone and 1# crushed stone are mixed evenly, and heated to 165 ℃ to obtain a mixed material;

[0045] In order to verify the road performance of the above mixture, the optimal asphalt content (4.2%) determined by the Marshall compaction test was added to the mixture prepared above with a mass percentage of 4.2% and a temperature of 155 ℃. 70# A grade road asphalt is mixed to obtain red mud desalinated sea sand AC-16 asphalt mixture, and the same measurement method as in Example 1 is us...

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Abstract

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, which comprises homogeneously mixed raw material components with the following mass content: 3.7% to 5.4% red mud , 3.7% to 5.4% of asphalt, 22.3% to 28.8% of desalinated sea sand (with a particle size of 0‑2mm), 13.4% to 17.3% of 3# gravel (2mm‑5mm), 8.9% to 13.9% of 2 # Gravel (5mm‑10mm), 35.4% to 41.6% of 1# gravel (10mm‑20mm). The invention also discloses a preparation method of the above red mud desalinated sea sand AC-16 asphalt mixture. The red mud desalinated sea sand AC-16 asphalt mixture of the present invention has the characteristics of convenient material acquisition, energy saving and environmental protection, and is a new type of building material; it uses a large amount of red mud and sea sand, which can solve the environmental protection and land occupation problems of red mud , can alleviate the increasingly scarce river sand resources, stabilize the river sand market, and expand the application range of red mud and sea sand, which has far-reaching influence and broad application prospects; and the road performance index meets the specification requirements, which can greatly reduce Material costs for AC‑16 asphalt mixtures.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a red mud desalination sea sand AC-16 asphalt mixture and a preparation method thereof. Background technique [0002] Sand is also known as concrete fine aggregate, which is a necessary material for construction projects; salvaged river sand for construction aggregate production is a traditional method in my country. Mortar; in today's continuous economic boom in my country, the demand for sand and gravel aggregates is naturally increasing; river sand can no longer meet the requirements of my country's rapid development of construction. Every year, my country's infrastructure construction requires hundreds of billions of tons of sand, causing "green mountains to turn white and rivers to turn yellow", which seriously affects my country's ecological environment. The amount of mining was unexpected, and there was an urgent need to replace sand resources with ot...

Claims

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Application Information

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Patent Type & Authority Patents(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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