Early-strength multi-scene applicable natural hydraulic lime slurry and modification preparation method thereof

A natural water, multi-scenario technology, applied in the direction of solid waste management, etc., can solve the problems of insufficient strength and slurry fluidity, water absorption and mortar porosity reduction, etc., to achieve good application prospects, high early curing strength, and repeatability strong effect

Active Publication Date: 2020-06-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, water absorption and mortar porosity are reduced
[0005] With the continuous development of modification work, natural hydraulic lime NHL has improved in terms of setting time, water absorption, permeability, mechanical properties and durability, but there are still deficiencies in early strength and slurry fluidity

Method used

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  • Early-strength multi-scene applicable natural hydraulic lime slurry and modification preparation method thereof
  • Early-strength multi-scene applicable natural hydraulic lime slurry and modification preparation method thereof
  • Early-strength multi-scene applicable natural hydraulic lime slurry and modification preparation method thereof

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Effect test

preparation example Construction

[0020] The modification preparation method of early-strength and multi-scenario application type natural hydraulic lime slurry comprises the following steps:

[0021] 1), with hydraulic lime 94%-99.9%, the ratio of isobutylene-maleic anhydride copolymer 0.1%-6%, take required hydraulic lime and isobutylene-maleic anhydride copolymer respectively; 0.3 to 0.6, according to the total mass of natural hydraulic lime and isobutylene-maleic anhydride copolymer weighed, measure the required water, the above are all in mass percentage; the ash in the water-cement ratio refers to the natural Hydraulic lime and isobutylene-maleic anhydride copolymer;

[0022] 2): adding the weighed isobutylene-maleic anhydride copolymer into water, heating in a water bath to obtain an aqueous solution of isobutylene-maleic anhydride copolymer, the temperature of the water bath is 35-55°C;

[0023] 3): adding the aqueous solution of isobutylene-maleic anhydride copolymer obtained in step 2) to the weighe...

Embodiment 1

[0027] 1) Weigh 188g of natural hydraulic lime and 12g of isobutylene-maleic anhydride copolymer; then weigh 60g of water.

[0028] 2) Add isobutylene-maleic anhydride copolymer to the weighed water, then heat in a water bath, the temperature of the water bath is 55°C; fully stir for 5 minutes, so that the isobutylene-maleic anhydride copolymer is fully dissolved in water, and the desired isobutylene-maleic anhydride copolymer is obtained. Aqueous solution of acid anhydride copolymer;

[0029] 3), transfer the natural hydraulic lime taken in step 1) into a standard cement mortar mixer for stirring, the stirring mode is automatic (the automatic mode is first slow, then pause for a period of time, and then stir quickly), in the stirring state Add the aqueous solution of isobutylene-maleic anhydride copolymer obtained in step 2), and mix the natural hydraulic lime and the aqueous solution of isobutylene-maleic anhydride copolymer to obtain the desired modified natural hydraulic l...

Embodiment 2

[0032] 1) Weigh 192g of natural hydraulic lime and 8g of isobutylene-maleic anhydride copolymer; then weigh 90g of water.

[0033] 2) Add isobutylene-maleic anhydride copolymer to the weighed water, then heat in a water bath, the temperature of the water bath is 45°C; fully stir for 5 minutes, so that the isobutylene-maleic anhydride copolymer is fully dissolved in water, and the desired isobutylene-maleic anhydride copolymer is obtained. Aqueous solution of acid anhydride copolymer;

[0034]3), the natural hydraulic lime taken by step 1) is transferred into a standard cement mortar mixer and stirred, the stirring mode is automatic, and in the stirring state, add the isobutylene-maleic anhydride copolymer aqueous solution obtained in step 2 to make the natural water The hard lime is mixed with the aqueous solution of isobutylene-maleic anhydride copolymer to obtain the desired modified natural hydraulic lime slurry.

[0035] 4), the modified natural hydraulic lime slurry prep...

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Abstract

The invention relates to early-strength multi-scene applicable natural hydraulic lime slurry, which comprises the following components in percentage by mass: and water, the water cement ratio is 30%-60%, and the ash comprises the following components in percentage by mass: 94%-99.9% of natural hydraulic lime and 0.1%-6% of an isobutylene-maleic anhydride copolymer. The preparation method comprisesthe following steps: dissolving the isobutylene-maleic anhydride copolymer in water, and uniformly mixing an isobutylene-maleic anhydride copolymer aqueous solution with natural hydraulic lime. According to the prepared slurry, the early strength and fluidity of natural hydraulic lime are improved, the service life of the natural hydraulic lime is prolonged, and the application scene of the natural hydraulic lime is expanded.

Description

technical field [0001] The invention belongs to the field of building materials and cultural relics protection materials, and in particular relates to a natural hydraulic lime slurry with early strength and multi-scenario application and a modification preparation method thereof. Background technique [0002] The rock and soil cultural relics such as ancient buildings (grotto temples, ancient city walls, ancient murals, ancient tomb sites, etc.) Cultural relics appear cracking, hollowing, massive peeling or even collapse in varying degrees. Therefore, materials for restoration of rock and soil cultural relics have always been the focus of research by cultural relic protection workers. [0003] Limestone, as one of the earliest inorganic materials for restoration of cultural relics, is widely used in restoration of cultural relics because of its good water permeability and air permeability. However, due to the shortcomings of traditional lime materials such as long setting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/12
CPCC04B28/12C04B2201/05C04B2201/50C04B24/2664
Inventor 朱建锋李允峰魏小红张彪惠晶张佩
Owner SHAANXI UNIV OF SCI & TECH
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