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Rolling-resistant semi-rigid base internal curing water retention material and preparation method thereof

A technology of semi-rigid base layer and water-retaining material, which is applied in the field of road materials, can solve the problems of weakening the performance of semi-rigid base layer, internal curing material maintenance efficiency, premature release of internal moisture, low strength, etc., so as to enhance rigidity, ensure water demand, Chemically stable effect

Active Publication Date: 2021-10-01
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing commercially available internal health-preserving materials form a gel state after absorbing liquid and swelling in the semi-rigid base layer, and the strength is not high. cracking, and premature release of internal moisture, which impairs the performance of the semi-rigid substrate and the curing efficiency of the internal curing material

Method used

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  • Rolling-resistant semi-rigid base internal curing water retention material and preparation method thereof
  • Rolling-resistant semi-rigid base internal curing water retention material and preparation method thereof

Examples

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preparation example Construction

[0047] A method for preparing an internal health-preserving and water-retaining material for a rolling-resistant semi-rigid base, comprising the following steps:

[0048] Step 1: Weigh silica airgel powder, glass powder, and nano-silicon nitride by mass, and mix them uniformly for later use;

[0049] Step 2: hydrolyze the silane coupling agent Si-602 under the action of acetic acid, add a certain amount of mixed solution of absolute ethanol and deionized water, wherein, m 无水乙醇和去离子水 :m 硅烷偶联剂Si-602 = 16:1, v 去离子水 : v 无水乙醇 =7:3, forming silane coupling agent Si-602 hydrolyzate;

[0050] Step 3: Evenly disperse the evenly mixed silica airgel powder, glass powder, and nano-silicon nitride in the hydrolyzate of the silane coupling agent Si-602 in step 2, stir with argon gas, and then let stand Until the layers are separated, the supernatant liquid is poured off, and the remaining mixture is dried to obtain modified silica airgel powder, glass powder, and nano-silicon nitride, wh...

Embodiment 1

[0062] This example provides a preparation method for an internal health-preserving and water-retaining material of a rolling-resistant semi-rigid base, which consists of the following raw materials by weight:

[0063] 10% silica airgel powder, 3% glass powder, 5% nano silicon nitride, 2% silane coupling agent Si-602, 1% acetic acid, 27% methacrylic acid, 7% oil phase material, 3% Carrageenan, 16% polyaspartic acid, 20% succinimide, 0.1% 1,4 butanediol diacrylate, 0.2% azobisisobutyronitrile, 0.3% cerium ammonium nitrate, 5.6% sodium ethoxide .

[0064] Wherein, in the oil phase material, Span 80 is 4% of the mass fraction of diethyl phthalate.

[0065] In particular, absolute ethanol, deionized water, and isopropanol are used as solvents, used to prepare solutions or wash raw materials, and do not participate in chemical reactions.

[0066] The preparation method of the internal health and water retention material of the above-mentioned rolling-resistant semi-rigid base com...

Embodiment 2

[0078] This example provides a preparation method for an internal health-preserving and water-retaining material of a rolling-resistant semi-rigid base, which consists of the following raw materials by weight:

[0079] 10% silica airgel powder, 3% glass powder, 8% nano silicon nitride, 3% silane coupling agent Si-602, 1.5% acetic acid, 25% methacrylic acid, 8% oil phase material, 3% Carrageenan, 14% polyaspartic acid, 18.82% succinimide, 0.18% 1,4 butanediol diacrylate, 0.2% azobisisobutyronitrile, 0.3% cerium ammonium nitrate, 5% sodium ethoxide .

[0080]In particular, the oil phase material is Span 80 and diethyl phthalate, and Span 80 is 6% of the mass fraction of diethyl phthalate.

[0081] In particular, absolute ethanol, deionized water, and isopropanol are used as solvents, used to prepare solutions or wash raw materials, and do not participate in chemical reactions.

[0082] The preparation method of the internal health and water retention material of the above-ment...

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Abstract

The invention discloses a rolling-resistant semi-rigid base internal curing water retention material and a preparation method thereof, and the rolling-resistant semi-rigid base internal curing water retention material is prepared from the following raw materials: silicon dioxide aerogel powder, glass powder, nano silicon nitride, a silane coupling agent Si-602, acetic acid, methacrylic acid, an oil phase material, carrageenan, polyaspartic acid, succinimide and 1, 4 butanediol diacrylate. Adding azodiisobutyronitrile, ceric ammonium nitrate and sodium ethoxide; the oil phase material is a mixture of diethyl phthalate and Span 80. The internal curing gel has rolling resistance and strong water absorption-retention performance, and on the basis of ensuring the internal curing efficiency of the semi-rigid base, the internal curing gel is complete in structure and does not crack in the rolling process, so that the drying shrinkage and early temperature shrinkage of the internal curing gel are controlled, the internal crack expansion of the semi-rigid base is reduced, and the internal curing efficiency of the semi-rigid base is improved. The mechanical property and the service life of the semi-rigid base asphalt pavement are improved, and the maintenance cost is reduced.

Description

technical field [0001] The invention belongs to the field of road materials, and relates to a semi-rigid base maintenance material, in particular to a rolling-resistant semi-rigid base internal health and water retention material and a preparation method thereof. Background technique [0002] Semi-rigid base has high stiffness and strong load spreading ability, so it is widely used in high-grade highways in my country. The semi-rigid base is a mixture formed by mixing an appropriate amount of cement, lime, fly ash or other industrial waste and other binders with water. After paving, compaction and curing, the pavement base is formed. The main advantages of the semi-rigid base include: high rigidity, so the bending and tensile stress at the bottom of the asphalt surface layer is usually less than 0.17Mpa, so it has a strong ability to resist driving fatigue damage, and it can even be considered that the asphalt surface layer will not cause driving fatigue damage It has high ...

Claims

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Application Information

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IPC IPC(8): C04B24/42C08F283/04C08F251/00C08F220/06C08F222/14C04B103/46
CPCC04B40/0046C08F283/04C08F251/00C04B2103/465C08F220/06C08F222/102C04B14/064C04B14/22C04B14/328C04B24/42C04B24/04C04B24/045C04B24/085C04B24/38C04B24/287C04B24/121C04B24/06C04B24/129C04B22/085C04B24/026
Inventor 何锐王柯谈亚文郑睢宁鲁孝松郑欣欣徐紫祎徐鹏
Owner CHANGAN UNIV
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