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Mixture with fire-resistant and heat-insulating functions

A mixture and heat insulation technology, applied in the field of concrete mixture, can solve the problems of aluminate refractory concrete not suitable for long-term load-bearing structure, long-term strength reduction and long-term strength reduction of aluminate refractory concrete, etc. The effect is good, the heat insulation performance is improved, and the effect of improving the anti-cracking performance

Inactive Publication Date: 2020-07-28
广东融泉汇混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The long-term strength of aluminate refractory concrete has a tendency to decrease, and the long-term strength of general aluminate refractory concrete is reduced by about 40% to 50%, which makes aluminate refractory concrete not suitable for long-term load-bearing structures, emergency repair projects (such as plugging In the temporary project of leakage), the applicability is narrow, and when Portland cement with high long-term strength is used to replace aluminate cement as the cement, although the made Portland concrete can effectively improve the aluminate refractory The long-term strength of concrete has a tendency to decrease, but the fire resistance and corrosion resistance of silicate concrete are much worse than that of aluminate refractory concrete. Mixture with good corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0050] An admixture with fire-resistant and heat-insulating functions, including the following components:

[0051] Portland cement, coarse aggregate, fine aggregate, magnesium fluoride, slag powder, water, water reducing agent.

[0052] The input quantity (unit kg) of each raw material among the embodiment 1-4 is shown in Table 2 for details

[0053] Table 2

[0054]

[0055]

[0056] refer to figure 1 , the preparation method of the mixture with refractory and heat insulating function in embodiment 1-4 comprises the following steps:

[0057] Step 1) Add Portland cement, water, and water reducing agent into the stirring tank at a rotating speed of 80r / min, and stir for 5min to form cement slurry.

[0058] Step 2) Add magnesium fluoride and slag powder into the cement slurry at a rotating speed of 80r / min and stir for 8min to form a premix.

[0059] Step 3) Add coarse aggregate and fine aggregate to the premix at a rotation speed of 50r / min, and stir for 15 minutes t...

Embodiment 5-8

[0061] The difference with embodiment 4 is:

[0062] An admixture with fire-resistant and heat-insulating functions, which also includes the following components:

[0063] Dysprosium fluoride.

[0064] The input amount (unit kg) of each raw material among the embodiment 5-8 is shown in Table 3 for details

[0065] table 3

[0066] Example 5 Example 6 Example 7 Example 8 Portland cement 100 100 100 100 coarse aggregate 260 260 260 260 fine aggregate 210 210 210 210 magnesium fluoride 112 112 112 112 Slag powder 26 26 26 26 water 135 135 135 135 Superplasticizer 11 11 11 11 Dysprosium fluoride 30 32.5 35 33

Embodiment 9-12

[0068] The difference with embodiment 4 is:

[0069] An admixture with fire-resistant and heat-insulating functions also includes the following components: dysprosium fluoride and neodymium fluoride.

[0070] The input amount (unit kg) of each raw material in embodiment 9-12 is shown in Table 4 for details

[0071] Table 4

[0072] Example 9 Example 10 Example 11 Example 12 Portland cement 100 100 100 100 coarse aggregate 260 260 260 260 fine aggregate 210 210 210 210 magnesium fluoride 112 112 112 112 Slag powder 26 26 26 26 water 135 135 135 135 Superplasticizer 11 11 11 11 Dysprosium fluoride 30 32.5 35 33 Neodymium fluoride 1 1.5 2 1.2

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Abstract

The invention relates to the technical field of concrete mixtures, in particular to a mixture with fire-resistant and heat-insulating functions. The mixture comprises the following components in partsby mass: 100 parts of Portland cement, 250 to 300 parts of coarse aggregate, 180 to 220 parts of fine aggregate, 110 to 120 parts of magnesium fluoride, 25 to 30 parts of slag powder and 120 to 150 parts of water. The mixture has the effects of high early strength and long-term strength, good corrosion resistance, good fire resistance and heat-insulating properties, good quality and wide applicability.

Description

technical field [0001] The invention relates to the technical field of concrete mixing materials, in particular to a mixing material with fire-resistant and heat-insulating functions. Background technique [0002] At present, with the development of society, concrete building structures are becoming more and more popular. Based on the different use requirements of different building structures, it is necessary to use different performance mixing materials. In buildings prone to fire, the building structure needs to have better fire resistance and heat insulation function, so it is necessary to use admixtures with refractory and thermal insulation functions to make refractory concrete building structures. [0003] The existing refractory concrete is a special concrete made of aggregate, cement and admixture in a certain proportion and directly poured into the mixture. Among them, the aluminate cement has a fast setting and hardening speed, a large heat of hydration, and sulfu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B111/28
CPCC04B28/04C04B2111/28C04B2201/50C04B18/12C04B14/06C04B22/126C04B18/141C04B2103/302
Inventor 夏先刚
Owner 广东融泉汇混凝土有限公司
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