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Retarder for novel water-resistant quick-hardening inorganic cementing material and preparation method thereof

A technology of inorganic gelling materials and retarders, applied in the field of retarders and preparations for repair materials, which can solve problems such as unfavorable engineering applications, loss of excellent performance, and short setting time, so as to protect the environment and improve retarding stability , Prolonging the effect of retarding time

Active Publication Date: 2020-11-13
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this water-resistant and fast-hardening inorganic gelling material has a short setting time and can be set within 10-60s, which is not conducive to engineering applications.
The retarder commonly used in this new type of water-resistant and fast-hardening inorganic gelling material is borate, which can prolong the coagulation time of the inorganic gelling material to 15-20 minutes, but at the same time will cause the strength of the material to drop greatly , losing the excellent properties of early strength and rapid hardening materials

Method used

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  • Retarder for novel water-resistant quick-hardening inorganic cementing material and preparation method thereof
  • Retarder for novel water-resistant quick-hardening inorganic cementing material and preparation method thereof
  • Retarder for novel water-resistant quick-hardening inorganic cementing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a novel water-resistant and fast-hardening inorganic gelling material refers to the Chinese patent document with the authorized announcement number CN104529378B, which specifically includes the following steps:

[0032] S1, weigh 30 parts of magnesium oxide, 50 parts of nano-silicon dioxide, 5 parts of sodium tetraborate powder, 5 parts of composite water reducing agent, 5 parts of potassium dihydrogen phosphate, and 5 parts of chloride-based early strength agent according to parts by weight. Put it into the cement slurry mixer and stir for 4 minutes to mix evenly;

[0033] S2. Add 10 parts of water to the cement slurry mixer and continue stirring for 18 seconds;

[0034] S3. Add 3 parts of polyvinyl alcohol water-based water repellent to the cement slurry mixer, and continue stirring for 22 seconds;

[0035] S4. Pour it into a mold and mold it for 28 minutes, then demould it to obtain a new type of water-resistant and fast-hardening inorganic g...

Embodiment 2

[0037] Step 1: Weigh and mix 30 parts of sodium tetraborate, 5 parts of phosphoric acid, 5 parts of potassium carbonate, and 10 parts of sodium tripolyphosphate according to parts by weight, stir at 100 r / min for 5 minutes and mix evenly to obtain mixture A;

[0038] Step 2, weigh and mix 25 parts of oligosaccharides, 35 parts of water, and 3 parts of dispersing aids according to parts by weight, and stir at 100 r / min for 10 minutes to mix evenly to obtain mixture B;

[0039] The mixture B was subjected to freeze-drying treatment, first dried at minus 45-60°C for 4 hours, and then hollow-dried for 8 hours to obtain oligosaccharide powder B with good dispersion and adsorption properties;

[0040] Step 3, mix the mixture powder A prepared in step 1, the oligosaccharide powder B prepared in step 2, and 5 parts of fly ash, and stir at 60r / min for 10min to mix evenly to obtain a slow Coagulant sample 1.

[0041] The retarder sample 1 that embodiment 2 makes, the novel water-resist...

Embodiment 3

[0043] Step 1: Weigh and mix 30 parts of sodium tetraborate, 5 parts of phosphoric acid, 5 parts of potassium carbonate, and 10 parts of sodium tripolyphosphate according to parts by weight, stir at 100 r / min for 5 minutes and mix evenly to obtain mixture A;

[0044] Step 2, weigh and mix 25 parts of oligosaccharides, 35 parts of water, and 3 parts of dispersing aids according to parts by weight, and stir at 100 r / min for 10 minutes to mix evenly to obtain mixture B;

[0045] The mixture B was subjected to freeze-drying treatment, first dried at minus 45-60°C for 4 hours, and then hollow-dried for 8 hours to obtain oligosaccharide powder B with good dispersion and adsorption properties;

[0046] Step 3, mix the mixture powder A prepared in step 1, the oligosaccharide powder B prepared in step 2, and 5 parts of lignin, and stir at 60 r / min for 10 minutes to mix evenly to obtain a retarder for inorganic repair materials Sample 2.

[0047] The prepared retarder sample 2 was added ...

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Abstract

The invention discloses a retarder for a novel water-resistant quick-hardening inorganic cementing material and a preparation method thereof. The retarder is characterized by being prepared from the following raw materials: borate, an inorganic acid, carbonate, construction waste powder, sodium tripolyphosphate, oligosaccharide and a dispersing aid according to a weight ratio of (30-40): (5-15): (5-10): (5-10): (10-15): (25-35): (1-5). Firstly, borate, inorganic acid, carbonate and sodium tripolyphosphate are mixed to prepare an inorganic retarder, and then the inorganic retarder, organic retarder oligosaccharide and construction waste powder are mixed. The inorganic retarder and the organic retarder cooperate with each other to achieve a retarding effect on the novel water-resistant quick-hardening inorganic cementing material. The method is simple and easy to implement and low in production cost, the prepared retarder has a good retarding effect on a novel water-resistant quick-hardening inorganic cementing material, and a foundation is laid for industrial application of the novel water-resistant quick-hardening inorganic cementing material.

Description

technical field [0001] The invention relates to a retarder for repairing materials and a preparation method thereof, in particular to a novel water-resistant rapid-hardening inorganic gelling retarder and a preparation method thereof. Background technique [0002] Natural disasters such as earthquakes, landslides, and mudslides can easily cause large-scale damage to roads and bridges, interrupt transportation with the outside world, and cause great difficulties for rescuers and relief materials. However, the maintenance of concrete pavement is very complicated. Ordinary cement concrete has the disadvantages of long repair setting time and poor adhesion of new and old concrete in the later stage of repair. At the same time, cement concrete pavement cannot be opened to traffic immediately after repair and requires long-term maintenance. Generally, it needs to be repaired after paving. It takes 14-28 days to open the traffic, which is a very difficult problem for heavy traffic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/10C04B24/24C04B103/22
CPCC04B40/0042C04B2103/22C04B22/0013C04B22/165C04B22/10C04B22/16C04B22/002C04B2103/408C04B24/10C04B18/08C04B24/24C04B18/26
Inventor 刘研研李潇潇王化田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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