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Cement prefabricated member, cement cementing material, and production method thereof

A production method and technology of cement glue, which is applied in the field of cement, can solve the problems of low flexural strength, achieve the effects of reducing types and dosage, simplifying the production process, and improving poor flexural performance

Inactive Publication Date: 2018-12-18
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the deficiencies of the prior art, the present invention provides a cement prefabricated part, a cementitious material and a manufacturing method thereof, so as to partially or completely improve or even solve the problem of low flexural strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment one: 0.03% graphene-standard sand-cement cementitious composite material

[0056] (1) Graphene dispersion: dissolve the polycarboxylate water-reducer in water at a mass ratio of 3:800, stir evenly, add graphene at a mass ratio of graphene to polycarboxylate water-reducer of 3:10, and stir fully to make graphite Alkene is dissolved in polycarboxylate superplasticizer solution;

[0057] (2) Mixing, with the mass ratio of each raw material: standard sand 50%, ordinary silicate 42.5 cement 40%, Belite 42.5 cement 10%, graphene 0.03%, polycarboxylate superplasticizer 0.1% (graphene and polycarboxylate superplasticizer mixed with cement quality) to mix the raw materials,

[0058] The mixing steps are as follows: first add the solution obtained in step 1 to the standard sand, stir slowly for 5 minutes, then add ordinary Portland 42.5 cement and Belite 42.5 cement at the same time, and stir for 3 minutes to obtain a mixture.

Embodiment 2

[0059] Embodiment 2: cement prefabricated parts

[0060] (1) Forming treatment, transfer the mixture in Example 1 to a mold with a specification of 160mm×40mm×40mm, vibrate for 5 minutes, scrape the surface of the mold, and place it in a curing box with a humidity of 90% at 20°C for 24 hours;

[0061] (2) Demoulding and curing, the sample in step 3 is removed from the mold, and cured in a curing box with a humidity of 90% at 20° C. to obtain a high-strength graphene-cement gelled composite material.

[0062] (3) After testing, the average 28-day flexural strength of this sample can reach 15.7MPa, the maximum strength can reach 16.4MPa, and the average compressive strength is 51MPa.

Embodiment 3

[0063] Embodiment three: 0.04% graphene-standard sand-cement cementitious composite material

[0064] (1) Graphene dispersion: dissolve the polycarboxylate water reducer in water at a mass ratio of 3:800, stir evenly, add graphene at a mass ratio of graphene and polycarboxylate water reducer at 2:5, and stir fully to make graphite Alkene is dissolved in polycarboxylate superplasticizer solution;

[0065] (2) Mixing, with the mass ratio of each raw material: 50% of standard sand, 40% of ordinary Portland cement 42.5, 10% of Belite 42.5 cement, 0.04% of graphene, 0.1% of polycarboxylate superplasticizer (graphene and polycarboxylate superplasticizer mixed with cement quality) to mix the raw materials,

[0066] The mixing steps are as follows: first add the solution obtained in step 1 to the standard sand, stir slowly for 5 minutes, then add ordinary Portland 42.5 cement and Belite 42.5 cement at the same time, and stir for 3 minutes to obtain a mixture.

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Abstract

A cement prefabricated member, a cement cementing material, and a production method thereof belong to the field of cement. The cement cementing material includes a cement base material, a graphene material and a polycarboxylate water reducer, wherein the graphene material accounting for 0.02-0.04 mass% of the cement base material. The cement base material includes an aggregate, Portland cement andBelite cement. By introducing the graphene, the cement cementing material is improved in rupture strength.

Description

technical field [0001] The invention relates to the field of cement, in particular to a cement prefabricated part, a cement gelling material and a manufacturing method thereof. Background technique [0002] Cementitious composites are the most common and widely used materials in engineering. Although cementitious composite materials have advantages such as high compressive strength, their durability is low and maintenance costs are high due to problems such as brittleness, easy fracture, low toughness and low flexural strength. For a long time, improving the flexural strength of cementitious composites has been an urgent problem to be solved. [0003] The information disclosed in this Background section is only intended to enhance the understanding of the general background of the present invention, and should not be considered as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B14/02
CPCC04B14/024C04B28/04C04B2201/50C04B24/24C04B22/002C04B14/06C04B7/3453
Inventor 张以河张娜李根袁健博
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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