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A kind of antibacterial asphalt concrete and preparation method thereof

A technology of asphalt concrete and asphalt, which is applied in the field of antibacterial asphalt concrete and its preparation, can solve the problems of affecting the service life of asphalt concrete, affecting the adhesion of asphalt and aggregate, affecting the bactericidal effect, etc., and achieves good antibacterial and sterilizing effects , save natural coarse aggregate, improve the effect of antibacterial effect

Active Publication Date: 2021-11-30
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After being damaged or peeled off, although it can be painted and repaired repeatedly, it needs continuous investment in manpower and materials and other resources, and the maintenance cost is high
[0005] (3) Commonly used fungicides are mostly chemical agents. Spraying fungicides on the surface of asphalt concrete may affect the adhesion between asphalt and aggregates and affect the service life of asphalt concrete
[0006] (4) Due to factors such as the easy adsorption and agglomeration of nano-photocatalytic materials and the viscosity of asphalt, it is difficult to mix evenly with asphalt or gravel when directly mixed, resulting in poor photocatalytic performance and affecting the bactericidal effect during use

Method used

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  • A kind of antibacterial asphalt concrete and preparation method thereof

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preparation example Construction

[0034] A preparation method of antibacterial asphalt concrete, carried out as follows:

[0035] Step 1: Add antibacterial main ingredients and antibacterial auxiliary materials into tap water with a volume of 1000 Å at the same time, ultrasonically disperse for 12 to 25 minutes, then filter and remove the tap water, and then use a ball mill to mill for 1.5 to 3.5 hours to obtain the antibacterial agent; V 1 =(50~300) V 2,in V 2 is the sum of the bulk volume of the antibacterial main material and the bulk volume of the antibacterial auxiliary material;

[0036] Step 2: Divide the antibacterial agent into three parts by weight, and record it as the first part of antibacterial agent, the second part of antibacterial agent, and the third part of antibacterial agent;

[0037] Step 3: Add the first part of antibacterial agent to tap water with a volume of , stir and disperse evenly to obtain a lubricating film liquid; put the coarse aggregate in a mixer, spray the lubricating f...

Embodiment 1

[0051] In this embodiment, the raw material ratio of asphalt concrete by weight is: 8 parts of asphalt, 40 parts of quartz sand, 150 parts of coarse aggregate, 4 parts of mineral powder, and 0.02 part of antibacterial agent; the antibacterial agent consists of antibacterial main material and antibacterial auxiliary material Composition; the antibacterial main material is an equal mass combination of nano-titanium dioxide, nano-graphite carbon nitride, and nano-zirconia; the anti-bacterial auxiliary material is nano-hexagonal boron nitride; the weight ratio of the anti-bacterial main material and the anti-bacterial auxiliary material is 1:0.16. The raw material ratio of artificial coarse aggregate by weight is: 21 parts of cement, 1.8 parts of metakaolin, 60 parts of quartz sand, 0.16 parts of basalt fiber, 0.035 parts of antibacterial agent, 11 parts of deionized water, and the natural coarse aggregate is basalt crushed stone.

[0052] In this embodiment, the coarse aggregate ...

Embodiment 2

[0063] In this embodiment, the raw material ratio of asphalt concrete by weight is: 8 parts of asphalt, 40 parts of quartz sand, 150 parts of coarse aggregate, 4 parts of mineral powder, and 0.02 part of antibacterial agent; the antibacterial agent consists of antibacterial main material and antibacterial auxiliary material Composition; the antibacterial main material is an equal mass combination of nano-titanium dioxide, nano-graphite carbon nitride, and nano-zirconia; the anti-bacterial auxiliary material is nano-hexagonal boron nitride; the weight ratio of the anti-bacterial main material and the anti-bacterial auxiliary material is 1:0.16. The raw material ratio of artificial coarse aggregate by weight is: 21 parts of cement, 1.8 parts of metakaolin, 60 parts of quartz sand, 0.16 parts of basalt fiber, 0.035 parts of antibacterial agent, 11 parts of deionized water, and the natural coarse aggregate is basalt crushed stone.

[0064] In this embodiment, the coarse aggregate ...

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Abstract

The invention relates to an antibacterial asphalt concrete and a preparation method thereof. The raw material ratio of the antibacterial asphalt concrete is: 5.5-11 parts of asphalt, 38-50 parts of quartz sand, 95-165 parts of coarse aggregate, mineral powder 3.5~7 parts, antibacterial agent 0.015~0.054 parts. The present invention uses artificial coarse aggregate to replace part of natural coarse aggregate, while saving natural coarse aggregate, significantly increases the light-receiving area of ​​the antibacterial agent; disperses the antibacterial agent on the surface of coarse aggregate, mineral powder and asphalt respectively to improve antibacterial The dispersibility of the agent in asphalt concrete ensures the number of exposed reactive sites and achieves the purpose of effective antibacterial.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to an antibacterial asphalt concrete and a preparation method thereof. Background technique [0002] Asphalt concrete is a mixture made by mixing asphalt and aggregate. Asphalt concrete is exposed to the air for a long time, and it is easy to accumulate a large number of bacteria on its surface or in the void. Bacterial metabolites have an erosive effect on aggregates, resulting in a decrease in the strength of aggregates, accelerating the stripping of asphalt and aggregates, and reducing the service life of asphalt concrete. At present, in order to prevent bacteria from eroding and destroying asphalt concrete structures, the existing solutions include spraying bactericides, coating bactericidal coatings, and photocatalytic sterilization. Among them, the effect of photocatalytic sterilization is affected by factors such as the properties of nano-photocatalytic materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B40/00C04B18/02C04B20/10C04B14/32C04B14/30C04B14/14C04B111/20
CPCC04B18/021C04B20/1066C04B26/26C04B40/0028C04B40/0039C04B2103/67C04B2111/0075C04B2111/2038C04B2111/2061C04B2111/2092C04B14/06C04B18/141C04B14/14C04B14/106C04B14/4656C04B20/1055C04B14/305C04B20/008C04B14/325C04B14/306C04B14/327
Inventor 杨政险卢林张勇王志远
Owner FUZHOU UNIV
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