Early strengthening flyash three-slag road forndation material

A roadbed material, fly ash technology, applied in the field of fly ash three-slag roadbed materials, can solve the problems of inability to be widely used, high cost, long maintenance period, etc.

Inactive Publication Date: 2004-03-24
SHANGHAI JINGAN NEW BUILDING MATERIAL SCI INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of using fly ash lime as the pavement base material in the prior art. It has a wide source of materials, low cost, good water stability and frost resistance to a certain degree, but its early strength is low, and construction is difficult. There are certain requirements on the temperature, and the maintenance period is long, and the traffic cannot be opened after the base is paved. To solve the above problems, the existing method is to add chemical additives or cement, but the cost is high, and it cannot be widely used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0005] Implementation 1: Get 65 kilograms of crushed stone, 24 kilograms of fly ash, 10 kilograms of slaked lime, the particle size of the crushed stone is 40-70MM, crushed stone, fly ash and slaked lime are the weight of dry material, stir, and then mix 1 kg of Accelerator (prepared by two parts of high calcium ash and one part of sodium sulfate) and mixed with 37 kg of water, and the total water content was controlled at about 27%.

Embodiment 2

[0006] Implementation 2: Get 73 kilograms of crushed stone, 18 kilograms of fly ash, and 8 kilograms of slaked lime. The particle size of the crushed stone is 5-30MM. Accelerator (prepared by two parts of high calcium ash and one part of sodium sulfate) and mixed with 37 kg of water, and the total water content was controlled at about 27%.

Embodiment 3

[0007] Implementation 3: get 80 kilograms of crushed stone, 14 kilograms of fly ash, 5 kilograms of slaked lime, the particle diameter of crushed stone is 5-30MM, crushed stone, fly ash and slaked lime are dry weight, stir, then 1 1kg of accelerator (prepared with 2 parts of high calcium ash and 1 part of sodium sulfate) and add 37 kg of water, mix and stir, and control the total water content at about 27%.

[0008] The moisture content of the above-mentioned early-strength fly ash three-slag roadbed material should be controlled not to exceed 5 percentage points of the standard after mixing, and the moisture content should not exceed 8 percentage points of the standard in hot days, so as to ensure that the moisture content is close to the optimum during construction and rolling. , should be paved as evenly as possible on the construction site, generally 15-25CM thick, and compacted with tire rollers or vibratory rollers.

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PUM

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Abstract

The present invention relates to an early-strength flyash three-slag road bed material, said road bed material composition includes 10%-30% of flyash, 5%-15% of slaked lime, 60%-84.5% of broken stone and 0.5%-1% of early-strength agent, and adds the water whose added quantity is 37% of the above-mentioned total weight, and the early strength agent is formed from two portions of high calcium lime and one portion of sodium sulfate, the flyash, slaked lime and broken stone are dry material, and the total content of SiO2 and Al2O3 in the flyash is greater than 70%, and the total content of active calcium oxide and magnesium oxide in the slaked lime is greater than 30%.

Description

technical field [0001] The invention relates to a fly ash three-slag roadbed material, in particular to an early-strength fly ash three-slag roadbed material. Background technique [0002] As early as the 1960s, Shanghai used fly ash lime as the pavement base material. It has a wide range of sources, low cost, good water stability and a certain degree of frost resistance, but its early strength is low, and it has a negative impact on the temperature during construction. Certain requirements, and the maintenance period is long, and the base layer cannot be opened to traffic after paving. To solve the above problems, the existing method is to add chemical additives or cement, but the cost is high, and it cannot be widely used. Contents of the invention [0003] The purpose of the present invention is to solve the problem of using fly ash lime as the pavement base material in the prior art. It has a wide source of materials, low cost, good water stability and frost resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/08C04B22/14C04B28/10E01C3/00
CPCY02W30/91
Inventor 孙家瑛施惠生周承功沈增光于鸣
Owner SHANGHAI JINGAN NEW BUILDING MATERIAL SCI INST
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