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Novel grouting agent

A new type of coagulant technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of unreasonable use of admixtures, insufficient effect, difficult control of the expansion process, etc., to achieve enhanced stability , Improve the expansion effect and control the reaction rate

Active Publication Date: 2021-07-27
吉安市金羧科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the calcium oxide expansion agent is physically, chemically coated or chemically modified to slow down the hydration rate of the expansion agent, but the effect of this method is not good enough, the expansion process is difficult to control, and the grouting agent is not used reasonably The role of other admixtures in

Method used

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  • Novel grouting agent

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment provides a new type of grouting agent, including 10 parts of expansion-water-reducing compound, 15 parts of expansion-retarding component and 5 parts of retarder B. The expansion component in the expansion-water-reducing compound is expansion agent A, the expansion-retarder component includes expansion agent B and retarder A.

[0036] Expansion agent A is composed of sulfoaluminate type expansion agent and calcium oxide type expansion agent according to the mass ratio of 1:1, the mass ratio of expansion agent B and retarder A is 1:0.8, and expansion agent B is calcium oxide type expansion agent , the retarder A is molasses, and the retarder B is citric acid.

Embodiment 2

[0038] On the basis of Example 1, this example also provides a new type of grouting agent. The raw materials for the preparation of the expansion-water-reducing compound include: 30 parts of acrylic acid, 10 parts of sodium methacrylate, allyl alcohol poly 8 parts of oxyethylene ether, 0.14 parts of initiator, 0.1 part of fumed silica, 20 parts of expansion agent A, and the initiator is azobicyclohexylcarbonitrile.

[0039] The preparation method of swelling-water-reducing compound is:

[0040] S1. Dry the reaction raw materials acrylic acid, sodium methacrylsulfonate, allyl alcohol polyoxyethylene ether, initiator, fumed silica, and expansion agent A to remove moisture respectively, and set aside;

[0041] S2. Add allyl alcohol polyoxyethylene ether into the reaction vessel, heat to dissolve, then add sodium methacrylate and fumed silica, and stir at 200r / min for 10min to obtain a suspension;

[0042] S3. After mixing the acrylic acid and 1 / 2 initiator evenly, add dropwise to ...

Embodiment 3

[0048] On the basis of Example 1, this embodiment also provides a novel grouting agent, the preparation method of the expansion-retarding component is:

[0049] A. After the expansion agent B is dried, mix it evenly, place it in a pulverizer of 1000r / min, pulverize it, pass through a 160 mesh sieve, and obtain the expansion agent B powder;

[0050] B. After heating and melting retarder A, add expansion agent B powder and mix evenly, then pass through a granulator to make 80-mesh granules, and then put them into a spherical shot blasting machine to make a ball core;

[0051] C. Put the ball core into the coating machine, spray into the coating material liquid, cool and dry to obtain the expansion-retarding component.

[0052] The mass ratio of pellet core to coating material solution is 1:0.02.

[0053] The preparation method of the coating material liquid is as follows: the paraffin, palm oil and o-phenylphenol glycidyl ether are dried to remove water respectively, and set as...

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Abstract

The invention discloses a novel grouting agent, which comprises 10-20 parts of an expanding-water reducing compound, 15-30 parts of an expanding-retarding component and 5-7 parts of a retarder B. The expanding component in the expanding-water reducing compound is an expanding agent A, wherein the expanding-retarding component comprises an expanding agent B and a retarder A. According to the novel grouting agent provided by the invention, an expansion component and a water reducing component are combined to prepare an expansion-water reducing compound, so that the expansion effect of concrete in the early stage is improved; by combining the expansion component and the retarding component, the expansion and retarding effects in the later period of concrete hydration are improved; due to the two combination modes, all the components in the grouting agent can be matched with one another, and a greater effect can be achieved.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and more specifically relates to a novel grouting agent. Background technique [0002] The grouting agent is a new type of admixture composed mainly of inorganic functional materials and compounded with organic polymer functional materials. It has multiple functions such as efficient water reduction, reinforcement, plastic retention and reduction of bleeding. The grouting agent is suitable for cement slurry, mortar and concrete grouting materials, especially suitable for the construction of post-tensioned prestressed concrete channel grouting materials for large-scale projects such as railways, roads, bridges, and nuclear power plants. Therefore, it is also required that the grouting agent can cause moderate expansion to compensate for the shrinkage of the hardened cement mixture in different periods, so the grouting agent needs to introduce an expansion agent. [0003] Calcium oxide...

Claims

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Application Information

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IPC IPC(8): C04B24/38C08F283/06C08F220/06C08F228/02
CPCC04B40/0039C08F283/065C08F220/06C08F228/02C04B24/04C04B24/16C04B24/32C04B14/064C04B2103/0068C04B24/38C04B24/06C04B22/064Y02W30/91
Inventor 阙小文张伟甘霖肖东亮
Owner 吉安市金羧科技有限公司
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