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High temperature-resistant composite cement-based material and preparation method thereof

A technology of composite cement and base materials, applied in the field of cementitious materials, can solve the problems of cement-based materials such as reduced strength and poor fire resistance, and achieve the effects of increased strength, long setting time, and improved performance

Inactive Publication Date: 2018-06-08
BEIFANG UNIV OF NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the fiber that adopts in the above-mentioned invention belongs to flexible fiber, and its mechanism of action is to reduce the early shrinkage of cement-based material, simple mixing flexible fiber easily causes the reduction of cement-based material strength
[0006] In addition, because the hydration products of traditional Portland cement generally contain about 20% calcium hydroxide, and calcium hydroxide will decompose at about 500°C to 600°C, resulting in poor fire resistance of traditional Portland cement.

Method used

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  • High temperature-resistant composite cement-based material and preparation method thereof
  • High temperature-resistant composite cement-based material and preparation method thereof
  • High temperature-resistant composite cement-based material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh the preparations by the following parts by weight:

[0034] The specific surface area is 500m 2 / kg, alkalinity coefficient is 1.1, activity coefficient is 60 parts of slag (the slag with smaller specific surface area can be ground by ball mill);

[0035] The specific surface area is 550m 2 30 parts of metakaolin per kg;

[0036] 10 parts of calcined bauxite whose grade is first-class special grade;

[0037] The specific surface area is 600m 2 5 parts / kg of aluminum hydroxide powder;

[0038] 5 parts of sodium hydroxide;

[0039] 0.00015 copies of 4mm composite ecological fiber;

[0040] 6mm steel fiber 0.002 parts;

[0041] Solid content 45%, modulus is 30 parts of commercially available water glass of 3.3;

[0042] 0.1 parts of YP-3 retarder;

[0043] 26 parts of water.

[0044] Process as follows:

[0045] 1), slowly dissolve 5 parts of the weighed sodium hydroxide in 26 parts of the weighed water, prepare the sodium hydroxide solution, and place it ...

Embodiment 2

[0053] For comparison, ordinary Portland cement specimens were mixed and formed under laboratory conditions:

[0054] Prepare by weight:

[0055] Ordinary 52.5R Portland cement 100 parts;

[0056] 40 parts of water.

[0057] A cube specimen of 40mm×40mm×40mm was prepared from the obtained slurry according to the proportion, and the compressive strength at 28 days of age was 62.5MPa. After 2 hours of high temperature exposure at 1000 ° C, the specimen was destroyed, and the residual strength was 0. See the macroscopic photo and microscopic composition of the specimen. image 3 and Figure 4 .

Embodiment 3

[0059] This implementation case is an embodiment of molding different proportions under laboratory conditions.

[0060] Prepare materials according to the weight in Table 1:

[0061] Table 1 raw material ratio (by mass)

[0062]

[0063]

[0064] In Table 1, the physical properties of the relevant raw materials are shown in Table 2:

[0065] The physical property parameter of raw material in table 2 table 1

[0066]

[0067] The number A in Table 2 represents the material parameters used in the mix ratio of A1-A6 group in Table 1, and correspondingly, B represents the mix ratio of B1-B6 group, and C and D follow this rule.

[0068] Process as follows:

[0069] 1), slowly dissolve the weighed sodium hydroxide in the weighed water, prepare the sodium hydroxide solution, and place it to room temperature;

[0070] 2), take commercially available water glass by weight, the sodium hydroxide solution that will be placed to room temperature is mixed with commercially avai...

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Abstract

The invention relates to the technical field of gelling materials, and aims to provide a high temperature-resistant composite cement-based material suitable for being used in a high temperature environment, and a preparation method thereof. Powder raw materials include, by weight, 60-70 parts of slag, 20-30 parts of metakaolin, 5-10 parts of calcined bauxite, 4-8 parts of aluminum hydroxide, 0.0001-0.0005 part of composite ecological fibers, 0.005-0.0015 part of steel fibers and 0.1-0.2 part of a YP-3 set retarder; and a liquid raw material includes 45-65 parts by weight of a water glass solution. The preparation method has the advantages of utilization of industrial byproducts, greenness and energy saving; and the above product has a long setting time, can meet normal construction requirements, has excellent mechanical properties and excellent high temperature resistance, has a higher strength than 52.5 grade ordinary Portland cement, and can guarantee no destroy of the structure at ahigh temperature of 1000 DEG C.

Description

technical field [0001] The invention belongs to the technical field of cementitious materials, and in particular relates to a high-temperature-resistant composite cement-based material and a preparation method thereof. Background technique [0002] Cement is the most widely used man-made material in the world. With the rapid development of my country's economy, the demand for cement continues to increase, and my country's cement production has ranked first in the world for many years. The production of traditional Portland cement is an industry with high energy consumption, high resource consumption and high environmental load, which brings heavy pressure on my country's energy, resources and environment, and also brings severe challenges to the sustainable development of the cement industry. challenge. [0003] Alkali-activated gelling materials are a new type of gelling materials composed of potentially active industrial by-products and alkali components. Compared with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/006C04B2201/50C04B2201/52C04B18/141C04B14/106C04B14/303C04B20/0048C04B14/48C04B22/062C04B12/04C04B2103/22
Inventor 傅博程臻赟王德志韩静云李庆达
Owner BEIFANG UNIV OF NATITIES
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