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Zeolite carrier concrete internal curing agent as well as preparation method and application thereof

A concrete curing agent technology, applied in the field of concrete, can solve the problems of difficult uniform dispersion and complicated material sources, and achieve the effects of low cost, early shrinkage inhibition, and easy popularization and utilization

Active Publication Date: 2021-01-15
CCCC WUHAN HARBOR ENG DESIGN & RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the internal curing agent disclosed in the above-mentioned patent is difficult to disperse evenly in concrete, and the source of the material is complicated.

Method used

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  • Zeolite carrier concrete internal curing agent as well as preparation method and application thereof
  • Zeolite carrier concrete internal curing agent as well as preparation method and application thereof
  • Zeolite carrier concrete internal curing agent as well as preparation method and application thereof

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preparation example Construction

[0036] In addition, the present invention also discloses a preparation method of the above-mentioned internal curing agent, which includes the following steps:

[0037] 1) The parts by mass are deionized water: 100-300 parts, acrylic compound: 4.5-10 parts, acrylamide compound: 50-100 parts, sodium hydroxide: 20-50 parts, cross-linking agent: 0.05- 0.2 parts and initiator: 0.05 to 0.2 parts of each raw material component are mixed and reacted to prepare a water-absorbing polymer as a core-shell structure core solution; the water-absorbing capacity of the water-absorbing polymer in fresh water is not less than 40 times.

[0038] 2) Take the porous zeolite and soak it in the nuclear solution of step 1) until it is completely saturated, then take it out and drain it; generally soak for about 45 minutes. The mass of the porous zeolite is 0.5-2wt% of the mass of the nuclear solution; during this step, the water-absorbing polymer is adsorbed inside the porous zeolite, and the water-a...

Embodiment 1

[0046] This embodiment discloses a kind of preparation method of internal maintenance agent, it comprises the steps:

[0047] 1) The parts by mass are deionized water: 100 parts, acrylic acid: 4.5 parts, methacrylamide: 50 parts, sodium hydroxide: 20 parts, N,N'-methylenebisacrylamide: 0.05 parts and over Potassium sulfate: 0.05 parts of each raw material component is mixed and reacted to prepare a water-absorbing polymer as a core-shell structure core solution; 2) The average particle size is 0.02mm, and the specific surface area is >800m 2 / g, the natural zeolite with a porosity of 50% is immersed in the nuclei solution of step 1) and soaked until fully saturated for 45min and then taken out and drained; the quality of the natural zeolite is 0.5wt% of the nuclei solution quality; during this step , the water-absorbing polymer is adsorbed inside the porous zeolite, which better retains the water-absorbing and water-releasing properties of the water-absorbing polymer;

[0048...

Embodiment 2

[0050] This embodiment discloses a kind of preparation method of internal maintenance agent, it comprises the steps:

[0051] 1) The parts by mass are deionized water: 300 parts, methacrylic acid: 10 parts, N-methylolacrylamide: 100 parts, sodium hydroxide: 50 parts, ethylene glycol dimethacrylate: 0.2 parts And sodium persulfate: 0.2 parts of each raw material component mixed reaction to prepare water-absorbing high molecular polymer as core-shell structure core solution; 2 / g, the natural zeolite with a porosity of 60% is immersed in the nuclei solution of step 1) and soaked until fully saturated for 45min and then taken out and drained; the quality of the natural zeolite is 2wt% of the nuclei solution quality; during this step, The water-absorbing polymer is adsorbed inside the porous zeolite, which better retains the water-absorbing and water-releasing properties of the water-absorbing polymer;

[0052] 3) The product obtained in step 2) is placed in a microwave reactor, ...

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Abstract

The invention discloses a zeolite carrier concrete internal curing agent as well as a preparation method and application thereof, and belongs to the technical field of concrete. The internal curing agent is prepared from the following raw material components in parts by mass: 4.5 to 10 parts of an acrylic acid compound, 50 to 100 parts of an acrylamide compound, 0.05 to 0.2 part of a cross-linkingagent, 0.05 to 0.2 part of an initiator, 100 to 300 parts of deionized water and 2.5 to 10 parts of porous zeolite, wherein the particle size of the porous zeolite is 0-0.15 mm, the specific surfacearea of the porous zeolite is greater than 800m<2> / g, and the porosity of the porous zeolite is 50-60%. Porous zeolite is used as an outer shell and adsorbs a water-absorbing high-molecular polymer core solution prepared from the raw material components to prepare a particle material with appropriate granularity and a core-shell structure, the particle material is compounded with other materials to prepare concrete, the particle material can occupy certain hollow holes in the concrete due to water absorption and swelling, the water absorption process is slow, the water release effect is slow,and the early shrinkage of the concrete can be effectively inhibited on the basis of improving the mechanical property of the concrete.

Description

[0001] The invention relates to a concrete admixture, which belongs to the technical field of concrete, in particular to a zeolite-carrier concrete internal curing agent and its preparation method and application. Background technique [0002] With the gradual development of modern concrete technology towards high-strength and high-performance concrete, the concrete has considerable chemical shrinkage and autogenous shrinkage during the hydration process and drying process due to the reduction of the water-binder ratio and the high amount of glue. High-strength and high-performance concrete is facing The problem of large early shrinkage and high crack sensitivity. According to the research, the most feasible and effective way is to compensate the water required for hydration from the inside of the concrete, and to maintain the concrete, that is, internal curing or self-curing. The internal curing of concrete refers to adding water-absorbing materials into the concrete, which c...

Claims

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Application Information

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IPC IPC(8): C04B24/24C04B28/04C08F220/06C08F220/56C08F222/38C08F220/58C08F222/14
CPCC04B40/0039C04B28/04C08F220/06C08F220/56C08F222/385C08F220/58C08F222/102C04B24/124C04B24/04C04B22/062C04B22/14C04B14/047C04B24/24C04B18/08C04B18/141C04B14/06C04B14/28C04B2103/302Y02W30/91
Inventor 程书凯李顺凯屠柳青汪华文骆晚玥
Owner CCCC WUHAN HARBOR ENG DESIGN & RES
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