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Fiber reinforced mortar for repairing ancient masonry and preparation method of fiber reinforced mortar

A fiber-reinforced and masonry technology is applied to fiber-reinforced mortar. The mortar preparation field can solve the problems of easy occurrence of cracks and low strength, and achieve the effects of improving integrity and improving tensile strength.

Inactive Publication Date: 2020-02-04
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a fiber-reinforced mortar for the repair of old masonry, which solves the problems of cracks and low strength existing in the prior art when the mortar is hardened

Method used

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  • Fiber reinforced mortar for repairing ancient masonry and preparation method of fiber reinforced mortar

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Experimental program
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Effect test

Embodiment 1

[0040] Weigh respectively 54.4% of calcium hydroxide powder, 43% of water, 0.5% of natural flax plant fiber, and 2.1% of glutinous rice flour according to mass percentages; pour the weighed glutinous rice flour and water into the container and mix evenly, and heat the container at 100 ° C. Heating, heating for 0.5h, stirring at a low speed during the heating period, the rotation speed of the low-speed stirring is 50r / min, and adding water to the container every 10min to keep the concentration of the mixture at 5%, after the heating is completed, cool the container to 33°C , to obtain glutinous rice slurry; the calcium hydroxide powder, strength additives, titanium dioxide and the obtained glutinous rice slurry were mixed uniformly, poured into a cement mortar mixer and stirred at a high speed for 16 minutes, and the rotating speed of high-speed stirring was 200r / min to obtain a glutinous rice mortar Pour the obtained glutinous rice mortar into the test mold, use a metal ruler a...

Embodiment 2

[0042] Take by weight 53.35% of calcium hydroxide powder, 43.5% of water, 1% of natural flax plant fiber, and 2.15% of glutinous rice flour according to mass percentage; The container is heated, and the heating lasts for 0.8h. During the heating period, it is kept stirring at a low speed. The rotation speed of the low-speed stirring is 60r / min, and water is added to the container every 10 minutes to keep the concentration of the mixture at 5%. After the heating is completed, the container is cooled to 30 ℃, to obtain glutinous rice slurry; the calcium hydroxide powder, polypropylene and the obtained glutinous rice slurry were mixed evenly, poured into a cement mortar mixer and stirred at a high speed for 18min, and the rotating speed of high speed stirring was 180r / min to obtain a glutinous rice mortar. Pour the obtained glutinous rice mortar into the test mold, use a metal ruler along the top plane of the test mold, and move from one end of the top of the test mold to the othe...

Embodiment 3

[0044]Take by weight 52.3% of calcium hydroxide powder, 44% of water, 1.5% of natural flax plant fiber, and 2.2% of glutinous rice flour according to mass percentage; Heating the container, heating for 1.2h, stirring at a low speed during the heating period, the rotation speed of the low speed stirring is 70r / min, and adding water to the container every 10min to keep the concentration of the mixture at 5%, after the heating is completed, cool the container to 30 ℃, to obtain glutinous rice pulp; mix the calcium hydroxide powder weighed, natural flax plant fiber and the obtained glutinous rice pulp evenly, pour it into a cement mortar mixer and stir at a high speed for 15min, and the rotating speed of high speed stirring is 160r / min, to obtain glutinous rice Mortar, pour the obtained glutinous rice mortar into the test mold, use a metal ruler along the top plane of the test mold, move from one end of the test mold top to the other end of the test mold top in a split motion along...

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Abstract

The invention discloses a fiber reinforced mortar for repairing ancient masonry. The fiber reinforced mortar consists of the following raw material components in percentage by mass: 50.2-54.4% of calcium hydroxide powder, 43-45% of water, 0.5-2.5% of plant fibers and 2.1-2.3% of glutinous rice flour, wherein the sum of mass percentages of the components is 100%. The invention also discloses a preparation method of the mortar. The preparation method comprises the following steps: weighing the raw materials, preparing glutinous rice pulp, preparing glutinous rice mortar, preparing the glutinousrice mortar into an experiment test piece, and carrying out curing. The mortar prepared by the method has obviously improved compressive strength and meets requirements of restoration of cultural relics and buildings.

Description

technical field [0001] The invention belongs to the technical field of repairing materials for ancient building structures, and relates to a fiber-reinforced mortar used for repairing old masonry, and also relates to a preparation method of the mortar. Background technique [0002] Glutinous rice mortar is an important building material commonly used in masonry structures of ancient Chinese buildings, and is widely used in ancient Chinese architecture, transportation and water conservancy projects. As a bonding material for masonry structures, glutinous rice mortar can effectively bond block materials to form walls, columns and other structural components, and has good strength and durability. Due to the limited strength of ordinary glutinous rice mortar after hardening, the structural components formed by masonry are easy to crack along the masonry joints and affect the normal use of the structure under the long-term action of the environment or under various loads. In the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/28C04B111/72
CPCC04B26/285C04B2111/72C04B2201/50C04B18/248C04B22/064C04B24/2611C04B14/305C04B22/142
Inventor 卢俊龙王振山李晓蕾田建勃
Owner XIAN UNIV OF TECH
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