Montmorillonite substrate layer material capable of improving fracture resistance of cement mortar and preparation method of montmorillonite substrate layer material

A lamella material, montmorillonite-based technology, applied in the field of montmorillonite-based lamella material and its preparation, can solve problems such as difficult to disperse mechanical properties, difficult to break through micro-nano threshold adsorption, etc.

Active Publication Date: 2021-09-14
WUHAN UNIV OF TECH
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Problems solved by technology

However, since the particle size of montmorillonite is difficult to break through the micro-nano threshold and has strong adsorption, it is difficult to disperse in cement-based materials to improve its mechanical properties. Therefore, it is expected to find an effective method to combine montmorillonite Effectively used in cement-based materials

Method used

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  • Montmorillonite substrate layer material capable of improving fracture resistance of cement mortar and preparation method of montmorillonite substrate layer material
  • Montmorillonite substrate layer material capable of improving fracture resistance of cement mortar and preparation method of montmorillonite substrate layer material
  • Montmorillonite substrate layer material capable of improving fracture resistance of cement mortar and preparation method of montmorillonite substrate layer material

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Embodiment 1-6

[0034] Preparation of montmorillonite-based sheet material with improved flexural performance of cement mortar, the raw material components and mass percentages are: montmorillonite 11-13%, water 84-88%, intercalation modifier 1-3 %.

[0035] The preparation method of intercalation modifier used is: dissolving acrylamide and polyether (the number-average molecular weight is 400) in water is prepared into a solution with a total mass concentration of 40%, adding 2-mercaptoethanol (addition amount is acrylamide and 0.5% of the total mass of polyether), stirred for 5min, and then added vitamin C (the amount added was 0.2% of the total mass of acrylamide and polyether) and ammonium persulfate (the amount added was 0.1% of the total mass of acrylamide and polyether) , stirred and reacted at 60° C. for 3 h to obtain an intercalation modifier.

[0036] The molecular structural formula of the intercalation modifier used is as follows:

[0037]

[0038] Wherein m:n=9~11:1, k=9.

...

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Abstract

The invention relates to a montmorillonite substrate layer material capable of improving the fracture resistance of cement mortar. The montmorillonite substrate layer material is obtained by mixing and wet-grinding montmorillonite, an intercalation modifier and water. According to the invention, a small amount of the montmorillonite substrate layer material capable of improving the fracture resistance of the cement mortar, provided by the invention, is doped into a cement-based material, so that the early-stage compressive strength and fracture resistance of cement can be remarkably improved; and when 1-3% of the montmorillonite substrate layer material is doped into the cement-based material, the 1d compressive strength of the cement mortar can be improved by 6-45%, and the 1d fracture resistance can be improved by 25-53%.

Description

technical field [0001] The invention belongs to the technical field of mortar, concrete or artificial stone compositions containing inorganic binders or reaction products of inorganic and organic binders, and in particular relates to a montmorillonite-based layer material capable of improving the bending resistance of concrete and its preparation method. Background technique [0002] Montmorillonite is a natural layered aluminosilicate mineral with abundant reserves and wide sources. Its special layered structure, ion exchange and water absorption characteristics make it have good exfoliation dispersion. The exfoliated montmorillonite has a larger specific surface area and surface energy, so the physical and chemical properties will be further improved. Based on montmorillonite The cation exchangeability of the stone interlayer domain can expand its interlayer domain through intercalation reaction, and even form a part of nano-montmorillonite with approximate lamellar struc...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B28/02
CPCC04B40/0039C04B28/02C04B2201/50C04B14/104C04B24/124C04B24/32C04B24/16C04B24/06C04B22/14
Inventor 谭洪波古先粤贺行洋张俊杰聂康峻
Owner WUHAN UNIV OF TECH
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