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Water super-absorbing resin-based inner cured cement stabilized broken stone base material and preparation method thereof

A technology of cement-stabilized gravel and superabsorbent resin, which is applied in the field of road materials to reduce the number of times of watering and maintenance, promote the development of strength, and improve the durability of road surfaces

Inactive Publication Date: 2017-09-22
JIANGSU SINOROAD ENG TECH RES INST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of drying and shrinkage of the above-mentioned water-stabilized base, the present invention aims to provide a cement-stabilized gravel base material based on internal curing of superabsorbent resin and its preparation method, thereby improving the crack resistance of the water-stabilized base

Method used

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  • Water super-absorbing resin-based inner cured cement stabilized broken stone base material and preparation method thereof
  • Water super-absorbing resin-based inner cured cement stabilized broken stone base material and preparation method thereof
  • Water super-absorbing resin-based inner cured cement stabilized broken stone base material and preparation method thereof

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preparation example Construction

[0027] The invention provides a cement-stabilized crushed stone base material based on superabsorbent resin for internal curing and a preparation method thereof, comprising the following components in parts by weight:

[0028]

[0029] Additives include superabsorbent resin additives.

[0030] Further, the superabsorbent resin is carboxymethyl fiber, hydroxyethyl cellulose, polyacrylic acid, polyvinyl alcohol, polyoxyethylene, cellulose grafted acrylamide, cellulose grafted acrylic, fiber Any one of the grafted acrylonitriles. The particle size of the superabsorbent resin is 100-200 mesh, and the water absorption ratio is 15-50. In addition, in order to improve the distribution uniformity of the superabsorbent resin in the mixture and ensure the effect of superabsorbent treatment for internal health, the additives also include dispersants. The dispersants are ethylene-acrylic acid copolymers, calcium stearate, and aliphatic amides. any of the. The use of the dispersant c...

Embodiment 1

[0040] 100 parts of gravel, 4.5 parts of cement, super absorbent resin is polyacrylic acid, the particle size is 200 mesh, the water absorption rate is 30.5, the dosage is 1.3% of the amount of cement, and the water consumption is 4.5 parts. In addition, the gradation of gravel As shown in the table below:

[0041] Table 1 Gradation table of Example 1 crushed stone

[0042] Gravel particle size / mm

0～3

3～5

5～10

10～15

15～30

Amount / %

25

15

10

30

20

[0043] It is prepared according to the following steps: firstly, the above components are weighed in parts by weight, the superabsorbent resin is premixed with cement, and the mixture is fully stirred evenly.

[0044] The two-layer continuous paving process is used for construction operations. Since the superabsorbent resin can release water, the number of watering and health maintenance can be reduced.

Embodiment 2

[0046]100 parts of gravel, 5.5 parts of cement, superabsorbent resin is carboxymethyl cellulose, particle size is 150 mesh, water absorption rate is 22.1, the dosage is 0.8% of cement consumption, water consumption is 5.0 parts, stearic acid Calcium dispersant, the dosage is 0.05% of the cement dosage, and the gradation of crushed stone is shown in the table below:

[0047] Table 2 Gradation table of embodiment 2 crushed stone

[0048] Gravel particle size / mm

0～3

3～5

5～10

10～15

15～30

Amount / %

10

15

20

25

30

[0049] It is prepared according to the following steps: firstly weigh the above components by weight, add the superabsorbent resin into the crushed stone at a rate of 135g / h and pre-mix evenly, add other components and fully stir evenly.

[0050] The two-layer continuous paving process is used for construction operations. Since the superabsorbent resin can release water, the number of watering and health maintenance can ...

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Abstract

The invention discloses a water super-absorbing resin-based inner cured cement stabilized broken stone base material. The material comprises, by weight, 100 parts of broken stones, 4.5 to 5.5 parts of cement and 4.5 to 6 parts of water and the additive use amount is 0.5 to 1.3% of the amount of the cement. The water super-absorbing resin is a water swelling-type polymer which contains strong hydrophilic groups such as a hydroxyl group and a carboxyl group and has a certain crosslinking degree. Through adsorption action, the water super-absorbing resin can store water and is uniformly distributed in the cement stabilized macadam mixture. In the latter period, under driving of humidity gradient difference, osmotic pressure and capillary interspace negative pressure in the mixture, the water super-absorbing resin releases pre-stored water to cure cement stabilized broken stones so that the problem that poor water supplement and maintenance in the cement stabilized broken stone cause shrinkage and reduce cracking resistance is solved, greatly improves cracking resistance of the cement stabilized broken stones, delays road surface base reflection cracking and improves road durability.

Description

technical field [0001] The invention relates to the technical field of road materials, in particular to a cement-stabilized crushed stone base material based on superabsorbent resin internal curing and a preparation method thereof. Background technique [0002] The semi-rigid base has good plate properties, can effectively and well spread the load capacity, has certain tensile strength, fatigue resistance and good water stability, and has low cost, so it has been widely used in my country and other parts of the world. Wide range of applications. In the cement-stabilized asphalt pavement structure, since the base material is a hydraulic material, it will shrink in the process of dehydration and drying, and then produce shrinkage stress. At the same time, during the temperature change process, temperature stress will be generated inside it. Under the joint action of drying shrinkage stress and temperature stress, cracks will appear in the cement gravel base. Cracks in the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02
CPCC04B28/02C04B2103/0051C04B2103/408C04B2111/0075C04B2201/50C04B14/02C04B20/0076C04B24/2641C04B24/383C04B24/085C04B24/2611
Inventor 关永胜周文费燕华黄麒金光来
Owner JIANGSU SINOROAD ENG TECH RES INST CO LTD
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