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Concrete grouting agent and preparation method thereof

A grouting agent and concrete technology, applied in the field of building materials, can solve the problems of poor reliability, stability and durability, and achieve the effects of improving performance, being less prone to shrinkage cracking, and improving compression and crack resistance.

Inactive Publication Date: 2019-03-01
俞小峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a concrete grouting agent and its preparation method in view of the poor reliability, stability and durability of the current concrete grouting agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] The preparation method of expansion additive is:

[0028] Calcinate lime at 1700~1800°C for 3~5h, cool to room temperature, crush it through an 80-mesh sieve, collect the sieved particles and feed carbon dioxide gas, keep the flow rate at 5L / h, keep it at 600~700°C for 60~90min, and cool to At room temperature, to obtain a cooling product, take magnesite and crush it through a 100-mesh sieve, collect the sieved particles a, calcinate at 800-850°C for 20-40min, cool to room temperature, and obtain a cooling product a, take the cooling product a according to the mass ratio of 100~ 200:1~3, add octadecanoic acid, ball mill for 30~60min to get the ball mill, take the ball mill according to the mass ratio of 30~50:40~60:1~4, add the cooling material and sodium carbonate and mix to get the expansion additive.

[0029] The preparation method of cross-linking repair additive is:

[0030] (1) Take block copolymer P123 and add tetrahydrofuran according to the mass ratio of 1~3:1...

Embodiment 1

[0040] Block copolymer P123: PEO-PPO-PEO, polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer.

[0041] Limestone gravel size 5mm.

[0042] The preparation method of expansion additive is:

[0043] Lime was calcined at 1700°C for 3 hours, cooled to room temperature, crushed and passed through an 80-mesh sieve, and the sieved particles were collected and passed into carbon dioxide gas, keeping the flow rate at 5L / h, kept at 600°C for 60 minutes, cooled to room temperature, and the cooled product was obtained. The magnesium ore is crushed through a 100-mesh sieve, and the sieved particles a are collected, calcined at 800°C for 20 minutes, and cooled to room temperature to obtain a cooling product a. Take the cooling product a, add octadecanoic acid at a mass ratio of 100:1, and ball mill for 30 minutes to obtain a ball milling product , Take the ball mill and add the cooling material and sodium carbonate in a mass ratio of 30:40:1 to mix to obtain the e...

Embodiment 2

[0055] Block copolymer P123: PEO-PPO-PEO, polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer.

[0056] Limestone gravel size 10mm.

[0057] The preparation method of expansion additive is:

[0058] Lime was calcined at 1750°C for 4 hours, cooled to room temperature, crushed through an 80-mesh sieve, and the sieved particles were collected and passed into carbon dioxide gas, keeping the flow rate at 5L / h, kept at 650°C for 70 minutes, cooled to room temperature, and the cooled product was obtained. The magnesium ore is crushed through a 100-mesh sieve, and the sieved particles a are collected, calcined at 830°C for 30 minutes, and cooled to room temperature to obtain a cooled product a. Take the cooled product a and add octadecanoic acid at a mass ratio of 150:2, and ball mill for 40 minutes to obtain a ball-milled product , Take the ball mill and add the cooling material and sodium carbonate in a mass ratio of 40:50:3 to mix to obtain the expansion a...

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Abstract

The invention discloses a concrete grouting agent and a preparation method thereof, and belongs to the technical field of construction materials. The preparation method comprises the steps that lime serving as a raw material is calcinated, and then carbon dioxide is introduced in, through calcium oxide in lime which reacts rapidly at the earlier stage and magnesium oxide which reacts at a later stage, the concrete is not liable to crack in the later stage, and the property of a grouting agent is improved. A segmented copolymer P123 serves as a raw material to react with N-hydroxyphthalimide tomake end groups of the segmented copolymer P123 be modified to be oxygen amino groups, and chloridion penetration resistance, sulfate corrosion resistance and carbonization resistance are improved. According to the preparation method, a swelling additive is added first to improve the fluidity of cement paste material, then hydrated lime powder and microsilicon powder serving as auxiliary materials are added to enhance concrete bleeding permeation resistance, a cellulose additive is added to toughen the concrete, the elasticity modulus is increased, and the integral mechanical property is improved. The concrete grouting agent solves the problem that a current concrete grouting agent has poor reliable stability and durability.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a concrete grouting agent and a preparation method thereof. Background technique [0002] Prestressed concrete technology is a new technology focused on promotion. It is widely used in buildings, bridges and special engineering structures, and is an indispensable and important part of construction technology. The key technology to ensure the service life of the prestressed concrete structure is to make the prestressed tunnel grouting dense, reduce the loss of prestressed force, and prevent the corrosion of steel bars. Post-tensioned prestressed concrete channel grouting construction technology is a new technology and a key procedure in the prestressed concrete construction process. In prestressed concrete structures, the quality of grouting directly affects the safety and reliability of the structure. The prestressed concrete channel grouting material is ...

Claims

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Application Information

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IPC IPC(8): C04B28/10C04B111/20
CPCC04B28/10C04B2111/00293C04B2111/20C04B2201/50C04B7/02C04B7/32C04B18/146C04B14/28C04B18/16C04B24/18C04B24/42C04B14/386C04B16/0633C04B18/248C04B24/124C04B24/121C04B22/14C04B22/064C04B22/066C04B22/10C04B24/281C04B24/003C04B24/129C04B24/023C04B24/005C04B24/125C04B22/124C04B24/10C04B24/04C04B24/16C04B24/38C04B22/06
Inventor 俞小峰路芸庞成荣
Owner 俞小峰
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