High-temperature-resistant anti-cracking concrete and preparation method thereof

A technology of concrete and high temperature resistance, which is applied in the field of concrete and can solve the problems of poor high temperature resistance and crack resistance of concrete

Inactive Publication Date: 2021-02-05
何国辉
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a kind of high temperature and crack-resistant concrete and its preparation method: by dissolving the naphthalene-based water reducer in water, then adding graphene, and ultrasonically treating the graphene, the Graphene is dispersed until it is completely dissolved to obtain a graphene solution. Add EVA emulsion to the graphene solution, stir it evenly, and use ultrasonic treatment to obtain a mixed solution.

Method used

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  • High-temperature-resistant anti-cracking concrete and preparation method thereof
  • High-temperature-resistant anti-cracking concrete and preparation method thereof
  • High-temperature-resistant anti-cracking concrete and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] see Figure 1-9 As shown, the present embodiment is a kind of high-temperature-resistant and crack-resistant concrete, comprising the following components in parts by weight:

[0053] 60 parts of river sand, 100 parts of gravel, 50 parts of cement, 10 parts of water, 2 parts of nano-titanium dioxide, 10 parts of nano-silica, 16 parts of nano-carbon fiber, 3 parts of fly ash, 3 parts of EVA emulsion, 1 part of graphene , 2 parts of naphthalene-based water reducer.

[0054] A preparation method of high-temperature-resistant and crack-resistant concrete, comprising the following steps:

[0055] Step 1: Dissolving the naphthalene-based water reducer in water, then adding graphene, ultrasonically treating the graphene, dispersing the graphene until completely dissolved, and obtaining a graphene solution;

[0056] Step 2: adding EVA emulsion to the graphene solution, stirring evenly, and treating with ultrasonic waves to obtain a mixed solution;

[0057] Step 3: Add the mi...

Embodiment 2

[0066] The difference between this embodiment and Embodiment 1 is that: a high-temperature-resistant and crack-resistant concrete includes the following components in parts by weight:

[0067] 70 parts of river sand, 110 parts of gravel, 60 parts of cement, 15 parts of water, 4 parts of nano-titanium dioxide, 13 parts of nano-silica, 18 parts of nano-carbon fiber, 4 parts of fly ash, 4 parts of EVA emulsion, 3 parts of graphene , 4 parts of naphthalene-based water reducer.

[0068] The performance of the high-temperature-resistant and crack-resistant concrete of Example 2 is detected, and the test results: the compressive strength at 25°C is 64.4Mpa, the compressive strength at 100°C is 60.1Mpa, the compressive strength at 200°C is 58.2Mpa, and the compressive strength at 500°C It is 46.3Mpa.

Embodiment 3

[0070] The difference between this embodiment and Embodiment 1 is that: a high-temperature-resistant and crack-resistant concrete includes the following components in parts by weight:

[0071] 80 parts of river sand, 120 parts of gravel, 70 parts of cement, 20 parts of water, 6 parts of nano-titanium dioxide, 16 parts of nano-silica, 20 parts of nano-carbon fiber, 5 parts of fly ash, 5 parts of EVA emulsion, 5 parts of graphene , 6 parts of naphthalene-based water reducer.

[0072]The performance of the high-temperature-resistant and crack-resistant concrete of Example 3 is detected, and the test results: the compressive strength at 25°C is 65.8Mpa, the compressive strength at 100°C is 62.3Mpa, the compressive strength at 200°C is 58.9Mpa, and the compressive strength at 500°C It is 47.5Mpa.

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Abstract

The invention discloses a high-temperature-resistant anti-cracking concrete and a preparation method thereof. The preparation method comprises the following steps: dissolving a naphthalene water reducer in water, adding graphene, dispersing graphene to prepare a graphene solution, adding an EVA emulsion into the graphene solution, uniformly stirring, carrying out ultrasonic treatment to obtain a mixed solution, adding the mixed solution into concrete production equipment, adding nano titanium dioxide, nano silicon dioxide, nano carbon fibers, cement, fly ash, river sand and gravels into the mixed solution, uniformly mixing to obtain semi-finished product concrete, and finally performing ultrasonic treatment on the semi-finished product concrete to obtain the high-temperature-resistant anti-cracking concrete. The nano titanium dioxide, nano silicon dioxide and nano carbon fibers are added into the high-temperature-resistant anti-cracking concrete, the high-temperature-resistant performance and the compressive strength of the concrete are improved, by adding the graphene, the brittleness of cement is improved, the toughness of the concrete is improved, and therefore microcracks are reduced, and the durability of the concrete is improved.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a high-temperature-resistant and crack-resistant concrete and a preparation method thereof. Background technique [0002] With the economic development and social progress and the continuous increase of population, buildings are becoming more and more dense, high-rise buildings are developing rapidly, and the fire problem of building structures is becoming more and more prominent. Among all kinds of fires, the most frequent and most serious losses are buildings. things catch fire. Concrete is currently the most widely used building material in civil engineering. Concrete structure is the main structural form of buildings. Therefore, the high temperature performance of concrete is very important to the fire behavior of buildings, and concrete will crack severely when subjected to high temperature in fire. , After being subjected to high temperature, the mechanics and durability of concret...

Claims

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Application Information

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IPC IPC(8): C04B28/00B28C7/16B28C7/10B28C5/40B28C5/16B28C5/08B08B9/087
CPCB08B9/087B28C5/0806B28C5/0818B28C5/0831B28C5/16B28C5/40B28C5/402B28C7/10B28C7/161B28C7/163C04B28/00C04B2201/50C04B2201/52C04B14/02C04B14/06C04B14/305C04B14/062C04B14/386C04B14/024C04B18/08C04B24/26C04B2103/302
Inventor 何国辉
Owner 何国辉
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