Impervious marble powder compound admixture and application thereof

A technology of composite admixture and marble powder, which is applied in the field of impermeable marble powder composite admixture, can solve the problems of low utilization rate of marble powder and poor application effect, and achieves improved pore structure distribution, improved pore structure, and improved Effects of Mechanical Properties and Durability

Active Publication Date: 2019-07-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to propose an impermeable marble powder composite admixture to solve the problems of low utilization rate of existing marble powder and poor application effect in concrete

Method used

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  • Impervious marble powder compound admixture and application thereof
  • Impervious marble powder compound admixture and application thereof
  • Impervious marble powder compound admixture and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A kind of anti-seepage type marble powder composite admixture (MI), by weight, comprises the following components:

[0035] Modified marble powder: 75 parts,

[0036] Modified metakaolin: 25 parts,

[0037] Rubber powder: 3 parts,

[0038] Basalt Fiber: 1 part.

[0039] Wherein, the rubber powder is redispersible vinyl acetate-ethylene copolymer rubber powder, and its solid content is greater than 98%; the monofilament diameter of the basalt fiber is preferably 15 μm, the length is preferably 18 mm, and the elastic modulus is preferably greater than 95 GPa. The elongation at break is preferably not less than 2%.

[0040] In the present embodiment, the modification method of modified marble powder comprises the following steps:

[0041] It is 50% activator solution that preparation concentration is 50% in the ultra-life disperser, wherein, the activator of preparation activator solution comprises sodium sulfate, soda ash, triisopropanolamine; The quality of sodium su...

Embodiment 2

[0049] The difference between this embodiment and the foregoing embodiments is that the anti-seepage type marble powder composite admixture (MII) of the present embodiment includes the following components in parts by weight:

[0050] Modified marble powder: 83 parts,

[0051] Modified metakaolin: 17 parts,

[0052] Rubber powder: 4 parts,

[0053] Basalt fiber: 0.5 parts.

[0054] During the modification process of marble powder, the activator accounts for 1.5% of the total amount of marble powder.

[0055] During the modification process of metakaolin, the silane coupling agent was prepared into a dilution solution with a mass concentration of 2% with absolute ethanol.

Embodiment 3

[0057] The difference between the present embodiment and the foregoing embodiments is that the anti-seepage type marble powder composite admixture (MⅢ) of the present embodiment comprises the following components in parts by weight:

[0058] Modified marble powder: 90 parts,

[0059] Modified metakaolin: 10 parts,

[0060] Rubber powder: 6 parts,

[0061] Basalt fiber: 1.5 parts.

[0062] During the modification process of marble powder, the activator accounts for 3% of the total amount of marble powder.

[0063] During the modification process of metakaolin, the silane coupling agent was prepared into a dilution solution with a mass concentration of 1.5% with absolute ethanol.

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Abstract

The invention provides an impervious marble powder compound admixture and an application thereof. The impervious marble powder compound admixture is prepared from following components in parts by weight: 75-90 parts of modified marble powder, 10-25 parts of modified metakaolin, 2-6 parts of rubber powder and 0.5-1.5 parts of basalt fiber. According to the impervious marble powder compound admixture, the marble powder and metakaolin are modified and then compounded with the rubber powder and the basalt fiber, the admixture for concrete is prepared, reaction activity of the impervious marble powder compound admixture and cement is greatly improved under the synergistic effect of the four components, an organic-inorganic three-dimensional interpenetration network structure which is stacked and staggered can be formed in the concrete when the admixture is applied to preparation of the concrete, so that pore structure distribution of the concrete is greatly improved, compactibility of the concrete is improved, and the prepared concrete has higher mechanical property and durability.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to an anti-seepage type marble powder composite admixture. Background technique [0002] In recent years, with the rapid advancement of my country's infrastructure construction, the demand for concrete has increased sharply, and the amount of concrete admixtures has also increased. However, due to insufficient resources of high-quality mineral admixtures and uneven regional distribution, commonly used admixtures (slag, fly ash, volcanic ash, etc.) are facing a shortage of resources and increased transportation costs, resulting in high concrete production costs. , poor economic benefits and other issues. In response to this situation, it is imperative to find a new concrete mineral admixture to alleviate the shortage of existing admixtures. [0003] my country is rich in marble resources, widely used, and has a huge output. In 2015, the output of natural marble building panels in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42
CPCC04B40/0039C04B14/285C04B14/46C04B22/147C04B22/10C04B24/122C04B24/42C04B14/106C04B24/026C04B24/26
Inventor 马保国储著根谭洪波汪杰彭毅
Owner WUHAN UNIV OF TECH
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