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Super-tough dry-mixed mortar and preparation method thereof

A dry powder mortar and toughness technology, applied in the field of dry powder mortar and its preparation, can solve the problems of uneven mixing, low mortar measurement accuracy, poor mortar stability, etc., and achieves low price, mature extraction method, and improved toughness and anti-cracking performance. Effect

Pending Publication Date: 2021-05-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional construction mortar is mixed on site. Due to construction technical problems, it is easy to cause low measurement accuracy and uneven mixing of mortar components, resulting in poor mortar stability and significantly affecting project quality.
The dry powder mortar is prepared and stirred evenly before construction, which can solve the above problems well, but to meet the construction needs, a variety of admixtures have to be mixed into the dry powder mortar to achieve better workability, which greatly increases the cost of the dry powder mortar
Moreover, due to the brittleness of the mortar itself, the phenomenon of cracking of the plastering mortar is still unavoidable

Method used

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  • Super-tough dry-mixed mortar and preparation method thereof
  • Super-tough dry-mixed mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of super-toughness dry powder mortar comprises the following steps:

[0025] (1) Iron tailings are selected as tailings, crushed, and fine aggregates of 50-100 mesh, 100-150 mesh, and 50 mesh or less are screened out, blended according to 1:1.5:0.1, and mixed evenly for later use;

[0026] (2) Weigh 150 parts of Portland cement, 2 parts of admixture, and 1.5 parts of anthocyanin powder. The admixture includes redispersible latex powder, cellulose ether, air-entraining agent and polypropylene fiber, according to available The weight ratio of redispersing latex powder, cellulose ether, air-entraining agent and polypropylene fiber is 1:0.25:0.05:0.125 to obtain A component, measure and pack it, and record it as A bag;

[0027] (3) According to the mass ratio of construction sand and tailings of 1:0.2, weigh 300 parts of construction sand and 60 parts of iron tailings and mix them evenly to obtain component B, measure and pack them into bags, and reco...

Embodiment 2

[0031] The preparation method of super-toughness dry powder mortar comprises the following steps:

[0032] (1) Iron tailings are selected as tailings, crushed, and fine aggregates of 50-100 mesh, 100-150 mesh, and 50 mesh or less are screened out, blended according to 1:1.2:0.05, and mixed evenly for later use;

[0033] (2) Weigh 150 parts of ordinary Portland cement, 5 parts of admixture, and 4 parts of glucose powder. The admixture includes redispersible latex powder, cellulose ether, air-entraining agent and polypropylene fiber. The weight ratio of dispersed latex powder, cellulose ether, air-entraining agent and polypropylene fiber is 1:0.25:0.05:0.125 to obtain A component, which is measured and packed into bags, which is recorded as A bag;

[0034] (3) According to the mass ratio of construction sand and tailings of 1:0.3, weigh 300 parts of construction sand and 90 parts of iron tailings and mix them uniformly to obtain component B, measure and pack them into bags, and ...

Embodiment 3~6

[0037] It is basically the same as Example 2, except that the dosage of glucose in Examples 3 to 6 is 0 parts, 2 parts, 6 parts, and 8 parts respectively.

[0038] Embodiment 2~6 all mixes with 45 parts of waters and obtains the mortar of mixing thoroughly, measures the coagulation time of the prepared mortar of embodiment 2~6, and result schematic diagram is as follows figure 1 shown. Depend on figure 1 It can be seen that with the increase of glucose content, the setting time of mortar increases, and the setting time can be adjusted according to the content of glucose in application.

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Abstract

The invention relates to super-tough dry-mixed mortar and a preparation method thereof. The super-tough dry-mixed mortar comprises a component A and a component B. The component A comprises, by weight, 120-500 parts of cement, 2-10 parts of an additive and 0.01-10 parts of a polyhydroxy compound; the component B comprises, in parts by weight, 200-1200 parts of building sand and 0-600 parts of tailings; and a weight ratio of the component A to the component B is 1: (1.0-4.0). The polyhydroxy compound can significantly improve the toughness and cracking resistance of concrete, so compared with traditional dry-mixed mortar, the mortar has the functional characteristics of high toughness, abrasion resistance, high damping and the like, can be used as plastering mortar for walls, grounds and the like, and can cope with the engineering problems of large-area mortar shrinkage and cracking, high temperature in summer, scouring in rainy seasons and the like; and the use of other admixtures can be greatly reduced due to the dispersion, water reduction and delayed coagulation effects of the super-tough dry-mixed mortar at normal temperature.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to dry powder mortar and a preparation method thereof. Background technique [0002] Traditional construction mortar is mixed on the construction site. Due to construction technical problems, the measurement accuracy of each component of the mortar is low and the mixing is uneven, resulting in poor stability of the mortar and significantly affecting the quality of the project. The dry powder mortar is prepared and stirred evenly before construction, which can solve the above problems well, but to meet the construction needs, a variety of admixtures have to be mixed into the dry powder mortar to achieve better workability, which greatly increases the cost of the dry powder mortar . Moreover, due to the brittleness of the mortar itself, the phenomenon of cracking of the plastering mortar is still unavoidable. Contents of the invention [0003] Aiming at the deficiencies in the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00017
Inventor 张津瑞韩庆华董必钦王安祝瑜
Owner TIANJIN UNIV
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