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Improved lime material for repairing building heritage walls and preparation method thereof

A heritage and wall technology, applied in the field of improved lime materials and preparation for the repair of architectural heritage walls, can solve the problems that hydraulic lime cannot meet the requirements of construction technology, the masonry process is complicated, and it takes a lot of time to optimize the slurry. Composition, delaying the hydration process, prolonging the effect of setting time

Pending Publication Date: 2022-04-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increasing demand for the protection of architectural heritage, there is a more urgent need for lime for architectural heritage restoration. Therefore, natural hydraulic lime is continuously used in the field of ancient building restoration. However, the setting time of hydraulic lime is much larger than that of traditional lime. However, the masonry process of traditional building walls is complicated and the construction time required is long. For example, it takes a lot of time to "plow the joints" after the silk-seam wall is built, which makes hydraulic lime unable to meet the traditional construction technology in the field of masonry repair. Require

Method used

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  • Improved lime material for repairing building heritage walls and preparation method thereof
  • Improved lime material for repairing building heritage walls and preparation method thereof
  • Improved lime material for repairing building heritage walls and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An improved lime material for building heritage wall repair, the mass percentage of the lime material is as follows:

[0035]

[0036]

[0037] Mix slaked lime, hydraulic components, heavy calcium micropowder and active micropowder evenly in proportion, and then use a ball mill to mill for 5 minutes at a speed of 100rpm to obtain a mixture; put the obtained mixture, cellulose ether and sucrose into a high-speed mixer and mix evenly , the mixing speed is 600rpm, and the optimized lime cementitious material is obtained.

[0038] Refer to the European standard BS EN196-1-2005 for the molding requirements of mortar specimens. The water-binder ratio is selected as 0.55 and the mortar ratio is 1:3. After demoulding, test the flexural strength and compressive strength. At the same time, referring to GBT 1346-2011 "Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Method", the standard consistency water consumption is used to make standard c...

Embodiment 2

[0043] An improved lime material for building heritage wall repair, the mass percentage of the lime material is as follows:

[0044]

[0045] Mix slaked lime, hydraulic components, heavy calcium micropowder and active micropowder evenly in proportion, and then use a ball mill to mill for 8 minutes at a speed of 200rpm to obtain a mixture; put the obtained mixture, cellulose ether and sucrose into a high-speed mixer and mix evenly , the mixing speed is 800rpm, and the optimized lime cementitious material is obtained.

[0046] Refer to the European standard BS EN196-1-2005 for the molding requirements of mortar specimens. The water-binder ratio is selected as 0.55 and the mortar ratio is 1:3. After demoulding, test the flexural strength and compressive strength. At the same time, referring to GBT 1346-2011 "Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Method", the standard consistency water consumption is used to make standard consistency c...

Embodiment 3

[0051] An improved lime material for building heritage wall repair, the mass percentage of the lime material is as follows:

[0052]

[0053] Mix slaked lime, hydraulic components, heavy calcium micropowder and active micropowder evenly in proportion, and then use a ball mill to mill for 10 minutes at a speed of 400rpm to obtain a mixture; put the obtained mixture, cellulose ether and sucrose into a high-speed mixer and mix evenly , the mixing speed is 1000rpm, and the optimized lime cementitious material is obtained.

[0054] Refer to the European standard BS EN196-1-2005 for the molding requirements of mortar specimens. The water-binder ratio is selected as 0.55 and the mortar ratio is 1:3. After demoulding, test the flexural strength and compressive strength. At the same time, referring to GBT 1346-2011 "Cement Standard Consistency Water Consumption, Setting Time, and Stability Test Method", the standard consistency water consumption is used to make standard consistency...

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Abstract

The invention discloses an improved lime material for repairing building heritage walls and a preparation method. The lime material comprises 30 to 70 wt% of slaked lime, 5 to 25 wt% of a hydraulic component, 15 to 55 wt% of ground calcium carbonate micro powder, 5 to 45 wt% of active micro powder, 0.05 to 0.2 wt% of cellulose ether and 0.05 to 0.4 wt% of sucrose. The preparation method comprises the following steps: uniformly mixing slaked lime, a hydraulic component, ground calcium carbonate micropowder and active micropowder in proportion, carrying out ball milling by using a ball mill to obtain a mixture, and mixing the mixture with cellulose ether and cane sugar at a high speed to obtain the improved lime material. A small amount of hydraulic components are added into a traditional slaked lime material, the compressive strength and breaking strength of traditional lime are moderately improved on the basis of keeping the excellent performance of the traditional lime, the setting time of the improved lime material is prolonged by adding cellulose ether and cane sugar, and the service life of the improved lime material is prolonged. The setting time of the improved lime material can meet the requirements of traditional masonry procedures of ancient buildings, and normal proceeding of a traditional ancient building repairing process is guaranteed.

Description

technical field [0001] The invention belongs to ancient building repair materials, and in particular relates to an improved lime material suitable for repairing architectural heritage walls and a preparation method. Background technique [0002] Lime is an important cementing material in the remains of ancient buildings in my country. It is widely used in foundations, foundations, walls, roofs, finishes, etc. The damage is serious, and a large number of ancient buildings have been out of order for a long time, waiting for repair. Ancient building maintenance projects require a large amount of lime cemented materials, but there is a shortage of high-quality limestone raw materials, and the production quality of lime cemented materials generally declines. In addition, lime is no longer the dominant material in the construction industry. The traditional firing process of ancient lime has basically been lost and has become a high Realistic problems of quality lime production. W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B24/10C04B24/38C04B111/72C04B111/54
CPCC04B28/10C04B24/10C04B24/383C04B2111/72C04B2111/547C04B2201/20C04B2201/50C04B22/00C04B22/0093C04B14/28C04B18/141
Inventor 张云升朱盼盼赵鹏肖建强沈旸
Owner SOUTHEAST UNIV
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