Road water stabilizing material and preparation method thereof

A water-stabilized material and road technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of high production energy consumption, miscellaneous components, poor quality stability, etc., and achieve high early strength, The production process is simple and the maintenance period is short

Active Publication Date: 2021-04-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the invention needs to be calcined at high temperature, and the production energy consumption is high
Patent CN102815915A discloses a modified phosphogypsum stabilization layer material for highways and its preparation method. The stabilization layer material prepared by this method has good water stability and small expansion, but the patent requires blast furnace slag, siliceous shale 1. Cement clinker is used as a modifier, with many components and poor quality stability

Method used

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  • Road water stabilizing material and preparation method thereof
  • Road water stabilizing material and preparation method thereof
  • Road water stabilizing material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1: Prepare medium-grained soil water-stabilizing material with cement-stabilized steel slag-gravel-phosphogypsum, wherein the dosage of phosphogypsum is 6%, and it is carried out according to the following steps:

[0039] Step 1. Weigh about 487.7g of steel slag in the range of particle size 4.65-20.0mm, about 709.3g of steel slag in the range of particle size 0.5-4.65mm, about 133.0g of phosphogypsum in the range of particle size 0-0.15mm, add about 76ml of water, stir and mix for 2 hours ;

[0040] Step 2: Weigh 487.7g of gravel with a particle size of 4.65-20.0mm, soak in water for 2 hours;

[0041] Step 3: Weigh 133g of cement, pour it into a mortar mixer together with the steel slag and phosphogypsum powder that have been stuffed in step 1, and mix and stir for 2 minutes;

[0042] Step 4: Add 133ml of water to the mixture in Step 3, mix and stir for 2 minutes;

[0043] Step 5. Pour the crushed stones completed in step 2 into the mixture in step 4, and ...

Embodiment 2

[0048] Embodiment 2: Prepare medium-grained soil water-stabilizing material with cement-stabilized steel slag-gravel-phosphogypsum, wherein the dosage of phosphogypsum is 9%, and it is carried out according to the following steps:

[0049] Step 1. Weigh 487.7g of steel slag in the range of 4.65-20.0mm in particle size, 642.7g of steel slag in the range of 0.5-4.65mm in particle size, 199.3g of phosphogypsum in the range of 0-0.15mm in particle size, add 76ml of water and stir and mix for 2 hours;

[0050] Step 2: Weigh 487.7g of gravel with a particle size of 4.65-20.0mm, soak in water for 2 hours;

[0051]Step 3: Weigh 133g of cement, pour it into a mortar mixer together with the steel slag and phosphogypsum powder that have been stuffed in step 1, and mix and stir for 2 minutes;

[0052] Step 4: Add 133ml of water to the mixture in Step 3, mix and stir for 2 minutes;

[0053] Step 5. Pour the crushed stones completed in step 2 into the mixture in step 4, and mix and stir fo...

Embodiment 3

[0058] Embodiment 3: Prepare fine-grained soil water-stabilizing material with cement-stabilized steel slag-phosphogypsum, wherein the dosage of phosphogypsum is 3%, and it is carried out according to the following steps:

[0059] Step 1. Weigh 25.2g of steel slag within the range of 0-0.3mm, 63.0g of steel slag within the range of 0.3-0.8mm, 63.0g of steel slag within the range of 0.8-3.0mm, and 52.2g of steel slag within the range of 3-4.65mm. , 6.3g of phosphogypsum within the range of 0-0.15mm, add 11.3ml of water and stir and mix for 2 hours;

[0060] Step 2: Weigh 12.6g of cement, pour it into a mortar mixer together with the steel slag and phosphogypsum powder that have been stuffed in step 1, and mix and stir for 3 minutes;

[0061] Step 3: Pour the water stabilizer mixed in Step 2 into the mold, use a concrete vibrating tamping rod or a manual tamping rod for preliminary vibration, and use a press with a range of not less than 2000KN to pressurize at a loading speed o...

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Abstract

The invention discloses a road water stabilizing material which is prepared from steel slag, ardealite, gravel and cement and is divided into a medium-grained soil water stabilizing material and a fine-grained soil water stabilizing material, the particle size of the fine-grained soil water stabilizing material does not exceed 4.65 mm, and the medium-grained soil water stabilizing material contains the gravel and the steel slag with the particle size ranging from 4.65 mm to 20.0 mm. The road water stabilizing material prepared from the steel slag, the phosphogypsum, the water and the gravel has the advantages of simple manufacturing process, short maintenance period, high early strength, wide material source, low price and the like, and has better economic practicability. The phosphogypsum and the steel slag can be co-processed, the phosphogypsum accounts for 6-9% of the total weight of the dry material of the water stabilizing material, the steel slag accounts for 50% of the total weight of the dry material of the water stabilizing material, and the technology can realize large-amount utilization of the two solid wastes. The phosphogypsum is moderate in mixing amount, and is not greatly adhered to the surface of the aggregate to hinder the adhesion of C-S-H and the aggregate. The steel slag, the gravel and the ardealite are separately sealed, so that the phosphogypsum adhered to the surface of the gravel can be effectively reduced, and the overall strength development of the water stabilizing material is facilitated.

Description

technical field [0001] The invention relates to a road water stabilizer and a preparation method thereof, belonging to the technical field of road water stabilizers. Background technique [0002] Steel slag is a kind of industrial solid waste produced in the steelmaking process of iron and steel enterprises. The annual output of steel slag in my country is about 100 million tons, and the cumulative stockpiles have reached 1.28 billion tons, and the utilization rate is only 20%. Phosphogypsum is a by-product of wet-process phosphoric acid production. The storage capacity in my country has exceeded 500 million tons, and there is a new storage capacity of 50 million tons every year. The storage pressure is high. [0003] Patent CN 105948639A uses cement, steel slag sand, and fine-grained soil as raw materials, aiming to solve the problem of shrinkage and cracking of cement-stabilized fine-grained soil as the pavement base. But this invention needs to be calcined at high temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/14
CPCC04B28/00C04B2111/0075C04B2111/00767C04B18/142C04B14/02C04B22/144Y02W30/91
Inventor 马丽萍卿三成敖冉隗一
Owner KUNMING UNIV OF SCI & TECH
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