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Lime-fly ash gravel and preparation method thereof

A technology of fly ash crushed stone and crushed stone, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of low strength and high shrinkage, easy cracking, etc., to reduce cracking and improve dispersion Degree, improve the effect of bending resistance and compression resistance

Pending Publication Date: 2021-12-03
浙江瑞美生态建设股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although this invention solves the problems of low strength and high shrinkage of old lime-fly ash and gravel recycled mixture in the prior art; Easy cracking problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: a kind of fly ash crushed stone, including lime, fly ash, water, crushed stone, stone powder, plant fiber and sulfoaluminate, wherein the stone powder is talcum powder, and the plant fiber is rice straw fiber, The sulphoaluminate cement comprises the following components by weight: 30 parts of silicon dioxide, 40 parts of calcium oxide, 15 parts of aluminum oxide, 2 parts of metal oxide, 10 parts of sulfur trioxide, wherein the metal oxide 2 parts are iron oxide.

[0044] The preparation method of described fly ash gravel comprises the following steps:

[0045] S1. The lime, fly ash, and water are mixed in a weight ratio of 10:12:20:1 to obtain a first-grade fly ash crushed stone;

[0046] S2. Add talc powder to the first-grade limestone gravel to obtain a secondary limestone gravel, the weight ratio of the first-grade limestone gravel to talcum powder is 200:1;

[0047] S3. Adding straw straw fiber to the secondary fly ash crushed stone to obtain a thir...

Embodiment 2

[0050] Embodiment 2: A kind of fly ash crushed stone, including lime, fly ash, water, crushed stone, stone powder, plant fiber and sulfoaluminate, wherein the stone powder is talcum powder, and the plant fiber is rice straw fiber, The sulphoaluminate cement comprises the following components by weight: 30 parts of silicon dioxide, 40 parts of calcium oxide, 15 parts of aluminum oxide, 2 parts of metal oxide, 10 parts of sulfur trioxide, wherein the metal oxide 2 parts are iron oxide.

[0051] The preparation method of described fly ash gravel comprises the following steps:

[0052] S1. The lime, fly ash, and water are mixed in a weight ratio of 10:12:20:1 to obtain a first-grade fly ash crushed stone;

[0053] S2. Adding talcum powder to the first-grade limestone gravel to obtain a secondary limestone gravel, the weight ratio of the first-grade limestone gravel to talcum powder is 100:1;

[0054] S3. Adding straw straw fiber to the secondary fly ash crushed stone to obtain a...

Embodiment 3

[0057] Embodiment 3: a kind of fly ash crushed stone, including lime, fly ash, water, crushed stone, stone powder, plant fiber and sulfoaluminate, wherein the stone powder is talcum powder, and the plant fiber is rice straw fiber, The sulphoaluminate cement comprises the following components by weight: 30 parts of silicon dioxide, 40 parts of calcium oxide, 15 parts of aluminum oxide, 2 parts of metal oxide, 10 parts of sulfur trioxide, wherein the metal oxide 2 parts are iron oxide.

[0058] The preparation method of described fly ash gravel comprises the following steps:

[0059] S1. The lime, fly ash, and water are mixed in a weight ratio of 10:12:20:1 to obtain a first-grade fly ash crushed stone;

[0060] S2. Adding talcum powder to the first-grade limestone gravel to obtain a secondary limestone gravel, the weight ratio of the first-grade limestone gravel to talcum powder is 100:1;

[0061] S3. Adding straw straw fiber to the secondary fly ash crushed stone to obtain a...

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Abstract

The invention belongs to the technical field of pavement bases, and particularly relates to lime-fly ash gravel and a preparation method thereof. The lime-fly ash gravel material which is not easy to crack during use is prepared from the lime, the fly ash and the water as well as the stone powder, the plant fibers and the sulphoaluminate. According to the present invention, the preparation steps are simple, the used material is safe and non-toxic, the stone powder improves the easy cracking defect when the lime-fly ash gravel is applied to the high-grade road base, the plant fiber improves the bending resistance and the pressure resistance of the lime-fly ash gravel, the added plant fiber reduces the falling phenomenon of the stone powder from the lime-fly ash gravel material, and the sulphoaluminate cement has the advantages that the coagulation speed of the lime-fly ash gravel is increased, and the stone powder is fixed on the plant fibers.

Description

technical field [0001] The invention belongs to the technical field of pavement bases, and in particular relates to a fly ash crushed stone and a preparation method thereof. Background technique [0002] The pavement base is a layered structure paved with a single material on the surface of the roadbed (or cushion) according to certain technical measures. Fly ash gravel is a semi-rigid structural material that constitutes the pavement base. Also known as fly ash stabilized crushed stone, fly ash crushed stone is generally prepared by mixing the inorganic binder lime, fly ash and graded crushed stone with a certain amount of water, rolling and curing, and the fly ash crushed stone has strength large, good water stability, etc., but the traditional fly ash macadam has the disadvantage of being easy to crack when it is applied to the base of high-grade roads, resulting in reflective cracks in the surface layer of high-grade roads, which affects the service life of the road, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/12C04B14/02C04B18/24C04B7/32C04B111/34
CPCC04B28/12C04B14/02C04B18/24C04B7/32C04B2111/00017C04B2111/0075C04B2111/343C04B18/08Y02W30/91
Inventor 施斌杰吴少峰杨琳钱敏
Owner 浙江瑞美生态建设股份有限公司