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Fluidized bed combustion ash and high titanium slag compounded stable pavement base material

A pavement base material and high-titanium slag technology, which is applied in the field of road pavement-road engineering materials, can solve the problems of limited mass application and low activity, and achieve the goals of reducing drying shrinkage cracking, reducing hydration expansion, and shortening the project period Effect

Active Publication Date: 2014-08-27
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-titanium slag is water-quenched blast furnace slag produced by using vanadium-titanium magnetite ironmaking in Southwest my country, which is similar to traditional water-quenched blast furnace slag; but because of its high titanium content, its activity in cement concrete is not high, which limits its use. bulk application

Method used

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  • Fluidized bed combustion ash and high titanium slag compounded stable pavement base material

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Effect test

Embodiment 1

[0018] The invention discloses a composite stabilized pavement base material of sulfur-fixing ash and high-titanium slag. The content of sulfur-fixing ash is 30% by weight, and the content of high-titanium slag is 70% by weight. The measured value of the composite stabilized pavement base material of sulfur-fixed ash and high-titanium slag: the maximum dry density ρ is 1.429g / cm 3 , the optimal water content ω is 27.0%, and the 7-day unconfined compressive strength R 7d 2.49MPa, 28-day unconfined compressive strength R 28d 10.04MPa, 28d volume linear change rate -14.91×10 -4 .

Embodiment 2

[0020] The invention relates to a composite stabilized pavement base material of sulfur-fixing ash and high-titanium slag. The content of sulfur-fixing ash is 40% by weight, and the content of high-titanium slag is 60% by weight. The measured value of the composite stabilized pavement base material of sulfur-fixed ash and high-titanium slag: the maximum dry density ρ is 1.425g / cm 3 , the optimal water content ω is 27.2%, and the 7-day unconfined compressive strength R 7d 2.70MPa, 28-day unconfined compressive strength R 28d 10.87MPa, 28d volume linear change rate -6.12×10 -4 .

Embodiment 3

[0022] The invention discloses a composite stabilized pavement base material of sulfur-fixing ash and high-titanium slag. The content of sulfur-fixing ash is 50% by weight, and the content of high-titanium slag is 50% by weight. The measured value of the composite stabilized pavement base material of sulfur-fixed ash and high-titanium slag: the maximum dry density ρ is 1.421g / cm 3 , the optimal moisture content ω is 27.4%, and the 7-day unconfined compressive strength R 7d 3.20MPa, 28-day unconfined compressive strength R 28d 12.35MPa, 28d volume linear change rate is 0.17×10 -4 .

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Abstract

The invention discloses a fluidized bed combustion ash and high titanium slag compounded stable pavement base material. The fluidized bed combustion ash and high titanium slag compounded stable pavement base material is formed by mixing 30-90wt% of fluidized bed combustion ash with 10-70wt% of high titanium slag. The fluidized bed combustion ash, the high titanium slag and water are stirred and mixed, and the obtained mixture is molded and maintained to make a fluidized bed combustion ash and high titanium slag compounded stable pavement base. The compounded stable pavement base material completely utilizes difficult-treatment and high-discharge-amount industrial wastes comprising the fluidized bed combustion ash and the high titanium slag, contains no lime or fly ash, and has better performances than traditional lime-fly ash stable pavement base material; and the compounded stable pavement base material has the advantages of low cost, no consumption of natural resources, simple and easy preparation method, suitableness for being used in areas short of traditional road engineering materials, substantial economic benefit, wide market prospect and strong practicality.

Description

technical field [0001] The invention belongs to the road pavement-road engineering material field, and relates to a composite stabilized pavement base material of sulfur-fixing ash and high-titanium slag. The sulfur-fixing ash and high-titanium slag composite stabilized pavement base material is suitable for pavement base material in road engineering. Background technique [0002] The pavement structure in road engineering is divided into the pavement base layer and the pavement surface layer laid on the pavement base layer. As an important layer in the pavement structure, the pavement base material bears the vertical force of the vehicle load transmitted from the surface layer and spreads to the underlying cushion and roadbed. Traditional pavement base materials are divided into three categories: flexible base materials (including graded aggregates, interlocking gravel, asphalt gravel and asphalt penetration, etc.), semi-rigid base materials (including cement-stabilized so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/30
CPCY02W30/91
Inventor 李军卢忠远牛云辉彭洪
Owner SOUTHWEAT UNIV OF SCI & TECH
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