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Ardealite road base material and preparation method thereof

A technology of road base and phosphogypsum, which is applied in the field of road construction materials, can solve problems such as easy adhesion to various equipment, low compressive resistance of road base, and great impact on resource utilization, so as to improve CBR value and non-toxicity Confining strength, improving lightness and stability, and reducing the effect of production links

Pending Publication Date: 2021-12-10
SICHUAN GREENTECH ENVIRONMENTAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the phosphorus pentoxide and fluorine contained in phosphogypsum have a great impact on resource utilization, the comprehensive utilization rate of phosphogypsum in my country in 2010 was only about 20%.
[0004] From the perspective of using phosphogypsum as roadbed filler, pure phosphogypsum is not suitable for roadbed filler, because pure phosphogypsum has strong hydrophilicity and poor water stability
The moisture content of phosphogypsum generally reaches 20%-25%. Due to its high moisture content and strong viscosity, it is easy to adhere to various equipment during loading, lifting, and transportation, resulting in blockage of accumulated material and affecting the normal production process. Carried out; the road base made of roadbed materials has low compressive resistance, especially the early strength is low, and the later stage is easy to crack

Method used

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  • Ardealite road base material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of phosphogypsum road base material, comprising the following steps:

[0024] S1, prepare phosphogypsum 68 (the crystal water content of the phosphogypsum is 15%, and the attached water content is 3%), 11 parts of quicklime (the effective content of calcium oxide is 95%), 13 parts of fly ash (the fly ash The natural water content of the fly ash is 35%, and the total content of silicon dioxide, aluminum oxide and iron oxide in the fly ash is 73%, the 0.3mm pass rate is 92%, and the 0.075mm pass rate is 76%), particle 7 parts of material soil (the content of granular soil with a particle size of 0.425mm in the granular soil is controlled at 5%), 3 parts of ZY2 solid curing agent, 20 parts of crushed stone, 20 parts of phosphorus slag, 4 parts of Portland cement back up;

[0025] S2. Stir 11 parts of the quicklime and 4 parts of the phosphogypsum at a low speed for 16 hours, grind the evenly stirred quicklime and the fly ash, pass through a 0.07mm sie...

Embodiment 2

[0029] S1, prepare 71 parts of phosphogypsum (the crystal water content of the phosphogypsum is 15%, and the attached water content is 5%), 11 parts of quicklime (the effective content of calcium oxide is 95%), 15 parts of fly ash (the powdered coal The natural water content of the ash is 35%, and the total content of silicon dioxide, aluminum oxide and iron oxide in the fly ash is not more than 73%, the 0.3mm pass rate is 92%, and the 0.075mm pass rate is 76%) , 8 parts of granular soil (in the granular soil, the granular soil content of 0.425mm in particle size is controlled at 5%), 5 parts of ZY2 type solid curing agent, 26 parts of gravel, 25 parts of phosphorus slag, silicate 5 parts of cement for backup;

[0030] S2. Stir 11 parts of the quicklime and 5 parts of the phosphogypsum at a low speed for 16 hours, grind the evenly stirred quicklime and the fly ash, and pass through a 0.07mm sieve for later use. Said phosphogypsum is pulverized through a 0.075mm sieve for subs...

Embodiment 3

[0034] S1, prepare 71 parts of phosphogypsum (the crystal water content of the phosphogypsum is 16%, and the attached water content is 3%), 12 parts of quicklime (the effective content of calcium oxide is 95%), 15 parts of fly ash (the powdered coal The natural water content of the ash is 35%, and the total content of silicon dioxide, aluminum oxide and iron oxide in the fly ash is not more than 73%, the 0.3mm pass rate is 92%, and the 0.075mm pass rate is 76%) , 9 parts of granular soil (in the granular soil, the granular soil content of 0.425mm in particle size is controlled at 5%), 4 parts of ZY2 type solid curing agent, 25 parts of crushed stone, 25 parts of phosphorus slag, silicate 6 parts of cement for standby;

[0035] S2. Stir 12 parts of the quicklime and 4 parts of the phosphogypsum at a low speed for 16 hours, grind the evenly stirred quicklime and the fly ash, pass through a 0.07mm sieve for later use, and simultaneously put the remaining Said phosphogypsum is pu...

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Abstract

The invention discloses an ardealite road base material and a preparation method thereof. The base material is prepared from the following raw materials: ardealite, quick lime, fly ash, granular soil, a curing agent, gravel, phosphorus slag and Portland cement. The preparation method comprises the following steps: preparing the raw materials for later use; stirring the quick lime and a part of the ardealite at a low speed, grinding and sieving the quick lime and the part of the ardealite for later use, and crushing and sieving the residual ardealite for later use; stirring the sieved ardealite and the curing agent at a low speed, then adding the sieved mixture of the quick lime and the ardealite and the fly ash, conducting stirring at a low speed, then adding the granular soil, the gravel, the phosphorus slag and the Portland cement, and carrying out uniform stirring; and adding water into the uniformly stirred total materials, and carrying out stirring. According to the invention, the preparation steps are simplified; and meanwhile, the early strength and other properties of the base material are effectively improved.

Description

technical field [0001] The invention relates to the field of road construction materials, in particular to a phosphogypsum road base material and a preparation method thereof. Background technique [0002] Phosphogypsum is a by-product of sulfuric acid extraction of phosphate rock to produce phosphoric acid. The main component is calcium sulfate dihydrate, which belongs to industrial waste. With the rapid development of my country's phosphate fertilizer industry, the production of phosphogypsum is increasing rapidly year by year. In 2009, the production of phosphogypsum in my country was as high as about 50 million tons, mainly concentrated in the southwest region, and relatively less in other regions. As of the end of 2011, the accumulated storage of phosphogypsum was about 300 million tons. A large amount of phosphogypsum stockpiling will not only encroach on valuable land resources, but also pollute the atmosphere, groundwater, and soil through wind and rain erosion. I...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B22/06
CPCC04B28/143C04B22/064C04B2111/0075C04B2201/50C04B18/08C04B14/361C04B18/12C04B18/145C04B7/02
Inventor 王艳岭黄辉王学
Owner SICHUAN GREENTECH ENVIRONMENTAL CO LTD