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Repair mortar and construction method thereof

A technology of repairing mortar and composite additives, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of increased cost, shedding, low construction efficiency, etc. The effect of improving bond strength and cohesive strength

Active Publication Date: 2010-07-28
SHENZHEN GRANDLAND DECORATION GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of light weight, the elastic modulus of these mortars is significantly greater than that of the air-entrained concrete block, which does not match the elastic modulus of the air-entrained concrete block, resulting in large deformation stress at the plastering interface and then air-entrained concrete. Drums and cracks; or the mortar layer cracks and falls off due to the movement of houses, bridges and large public buildings, which will affect the appearance of walls and large public buildings, and even bring safety hazards to owners or pedestrians
Secondly, due to the heavy weight of the existing mortar, it is difficult to achieve the effect of one-time filling and repairing thickness, and secondary operations are required. While increasing the cost of construction, the process is cumbersome and the construction efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Get each component according to the weight shown in embodiment 1 in table 1, production process is as follows:

[0042] Mix ordinary Portland cement, building gypsum, slaked lime, light aggregate, heavy aggregate, and F-type compound additives according to the above specific gravity, and stir evenly with a machine to obtain the lightweight repair mortar of Example 1, which is packed in paper bags Or in bulk.

[0043] Construction method: Take 100 kg of the light repair mortar obtained above in Example 1, add 30 kg of water to dilute, stir mechanically or manually until the mixture is uniform, and reach a viscosity suitable for mechanical spraying or manual construction. Mechanized spraying or manual work can then be carried out.

[0044]According to national standard GB / T 20473-2006 test dry surface density, national standard GB / T20473-2006 test thermal conductivity and industry standard SJG11-2004 test method for testing 28d bond strength, the results are as correspond...

Embodiment 2

[0046] With the weight of each component shown in Example 2 in Table 1, repeat the production process described in Example 1 (only the weight of each component changes) to obtain the lightweight repair mortar of Example 2; repeat the construction method in Example 1 , Take 100 kg of light repair mortar and add 40 kg of water to dilute, mechanically or manually stir until the mixture is uniform, and reach a viscosity suitable for mechanical spraying or manual construction, and then carry out mechanized spraying or manual work. Perform performance testing with each standard described in Example 1, and the results are as shown in the corresponding data of Example 2 in Table 2.

Embodiment 3

[0048] With the weight of each component shown in Example 3 in Table 1, repeat the production process described in Example 1 (only the weight of each component changes) to obtain the lightweight repair mortar of Example 3; repeat the construction method in Example 1 , Take 100 kg of lightweight repair mortar and add 50 kg of water to dilute it, stir it mechanically or manually until it is evenly mixed, and then carry out mechanized spraying or manual work. Perform performance testing with each standard described in Example 1, and the results are as shown in the corresponding data of Example 3 in Table 2.

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PUM

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Abstract

A light energy-saving repair mortar is prepared by mixing the following components according to the parts by weight: 25-30 parts of ordinary Portland cement higher than or equal to R325, 5-8 parts of construction gypsum, 3-5 parts of slaked lime with the fineness more than 300 meshes, 10-15 parts of light aggregate, 50-55 parts of heavy aggregate and 1 part of F compound additive, wherein the light aggregate is inorganic vitrified hollow microporous material with the fineness lower than 100 meshes; the heavy aggregate is river sand; and the F compound additive is prepared by mixing 0.25 part of lignocellulose, 0.25 part of polypropylene fiber and 0.4 part of redispersible latex powder according to parts by weight. 30-50 % of the repair mortar by weight is diluted with water and uniformly mixed through mechanical or manual stirring to meet the viscosity suitable for mechanical spraying or manual construction, and the mechanical spraying or manual construction can be carried out. The light repair mortar is applicable to be matched with various mortars for use so as to repair cracking and dropping and can fill the repair thickness at once, the process is simple, the manufacturing cost is low, and the repair mortar is applicable to indoor and outdoor repair works of houses, bridges and large public buildings.

Description

technical field [0001] The invention relates to a construction mortar, in particular to a composition of repair mortar and a construction method thereof. Background technique [0002] In vigorously developing and promoting the application of new wall materials (such as aerated concrete blocks, the weight of which is about 600-800Kg / m 3 ) at the same time, the self-weight of ordinary plastering mortar (its composition and weight ratio is generally ordinary portland cement 18-25, slaked lime 0-5, limestone sand 60-75, additive 0.24-0.40) is between 1700- 1800Kg / m 3 between. Due to the lack of light weight, the elastic modulus of these mortars is significantly greater than that of the air-entrained concrete block, which does not match the elastic modulus of the air-entrained concrete block, resulting in large deformation stress at the plastering interface and then air-entrained concrete. Drums and cracks; or the cracking and falling off of the mortar layer due to the movemen...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B2111/00482C04B2111/72C04B28/04Y02W30/91C04B14/02C04B16/0633C04B18/027C04B18/24C04B22/064C04B22/143C04B2103/0057C04B2103/46C04B24/26
Inventor 李少强张绮珊郭晓燕
Owner SHENZHEN GRANDLAND DECORATION GROUP