Road base material and preparation method thereof

A technology of road base and raw materials, applied in the direction of roads, roads, clay preparation equipment, etc., to achieve the effects of reducing usage, improving mechanical engagement, and improving compressive strength

Pending Publication Date: 2021-11-26
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patent can effectively utilize part of coal gangue, but coal gangue is rarely used as a raw material in road materials. Based on this, the present invention proposes a road base material and its preparation method, which can make coal gangue be utilized. At the same time reduce the harm to the ecological environment

Method used

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  • Road base material and preparation method thereof

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Effect test

Embodiment 1

[0032] This embodiment provides a road base material, which is composed of the following raw materials in parts by weight: 24 parts of modified coal gangue, 20 parts of cement, 7 parts of silicon powder, 23 parts of gravel, and 2 parts of water reducing agent.

[0033] Modified coal gangue is prepared according to the following steps in the present embodiment:

[0034] Pulverize coal gangue through a 200-mesh sieve, raise the temperature from room temperature to 700 °C at a rate of 2 °C / min in an air atmosphere, keep it for 2 hours, and cool it down to room temperature at a rate of 15 °C / min to obtain activated coal gangue;

[0035] Add activated coal gangue into the ethanol solution and stir for 2 hours to obtain a solution A with a concentration of 10 g / L, add the silane coupling agent to the ethanol solution and ultrasonically for 0.5 hours to obtain a solution B with a concentration of 300 g / L, and mix solution A and solution B Stir at 60°C for 4h, wherein the volume rati...

Embodiment 2

[0046] This embodiment provides a road base material, which is composed of the following raw materials in parts by weight: 58 parts of modified coal gangue, 36 parts of cement, 9 parts of silicon powder, 10 parts of gravel, and 3 parts of water reducer.

[0047] Modified coal gangue is prepared according to the following steps in the present embodiment:

[0048] Pulverize coal gangue through a 200-mesh sieve, raise the temperature from room temperature to 750 °C at a rate of 10 °C / min in an air atmosphere, keep it warm for 2 hours, and cool it down to room temperature at a rate of 20 °C / min to obtain activated coal gangue;

[0049] Add the activated coal gangue into the ethanol solution and stir for 2 hours to obtain a solution A with a concentration of 15 g / L. Add the silane coupling agent to the ethanol solution and ultrasonicate for 1 hour to obtain a solution B with a concentration of 350 g / L. Mix solution A and solution B in Stir at 50°C for 6h, wherein the volume ratio ...

Embodiment 3

[0055] This embodiment provides a road base material, which is composed of the following raw materials in parts by weight: 36 parts of modified coal gangue, 10 parts of cement, 5 parts of silicon powder, 15 parts of gravel, and 2 parts of water reducing agent.

[0056] Modified coal gangue is prepared according to the following steps in the present embodiment:

[0057] Pulverize coal gangue through a 200-mesh sieve, raise the temperature from room temperature to 720°C at a rate of 5°C / min in an air atmosphere, keep it warm for 3 hours, and cool it down to room temperature at a rate of 18°C / min to obtain activated coal gangue;

[0058] Add activated coal gangue into the ethanol solution and stir for 3 hours to obtain a solution A with a concentration of 20g / L, add the silane coupling agent to the ethanol solution and sonicate for 0.5h to obtain a solution B with a concentration of 400g / L, and mix solution A and solution B Stir at 55°C for 2h, wherein the volume ratio of soluti...

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Abstract

The invention belongs to the technical field of road engineering materials, and discloses a road base material and a preparation method thereof, the road base material comprises the following raw materials by weight: 24-58 parts of modified coal gangue, 10-36 parts of cement, 5-9 parts of silicon powder, 10-23 parts of gravel, and 2-3 parts of a water reducer. The invention also provides a preparation method of the road base material and a stirring device for preparing the road base material. The coal gangue can be effectively utilized, harm to the ecological environment is reduced, and the performance of the road base material is improved.

Description

technical field [0001] The invention relates to the technical field of road engineering materials, in particular to a road base material and its preparation method and application. Background technique [0002] Coal gangue is the solid waste discharged during the coal mining process and coal washing process. It is a black-gray rock with low carbon content and harder than coal that is associated with the coal seam during the coal formation process, including the excavation during the roadway excavation process. Gangue, gangue extracted from the roof, floor and interlayer during the mining process, and gangue picked out during the coal washing process. Its main component is Al 2 o 3 , SiO 2 , also contains varying amounts of Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O.P 2 o 5 , SO 3 And gallium, vanadium, titanium and other trace rare elements. With the continuous discharge of coal gangue, coal gangue occupies a large amount of land, and the escape or leaching of sulfide in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04E01C3/00C04B20/02C04B20/04C04B18/12C04B18/14B28C5/16B28C7/00
CPCC04B28/04C04B20/04C04B20/023C04B18/12C04B18/146E01C3/003B28C5/16B28C7/0007C04B2111/00017C04B2201/50C04B2111/0075C04B14/02C04B2103/302Y02W30/91
Inventor 曹鹏曹亮
Owner BEIJING UNIV OF TECH
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