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Nano modified inorganic mineral waterproof agent as well as preparation method and application thereof

An inorganic mineral and nano-modification technology, applied in the field of concrete structure protection and waterproof mortar, can solve the problems of high cost, poor weather resistance and durability, and decreased mechanical properties, and achieve the effect of low cost, good performance and good comprehensive performance.

Active Publication Date: 2022-03-11
BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Including the products involved in the above-mentioned inventions or technologies and many other waterproofing agent products on the market, in the actual use process, there are still common problems including: mainly surface hydrophobic When the concrete or mortar is damaged by abrasion, hammering, etc., the waterproof ability of the structure or components will be lost immediately, which cannot meet the protection requirements. At the same time, most of the surface waterproofing agents are mainly organic matter, so their weather resistance and durability are also poor.
The waterproofing agent mainly focuses on the overall hydrophobicity of the structure or component, usually a liquid agent. After being added in the process of concrete or mortar mixing, although it has an overall hydrophobic effect, it has a decline in mechanical properties, high cost, and difficulty in construction and molding. question

Method used

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  • Nano modified inorganic mineral waterproof agent as well as preparation method and application thereof
  • Nano modified inorganic mineral waterproof agent as well as preparation method and application thereof
  • Nano modified inorganic mineral waterproof agent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides a nano-modified inorganic mineral water repellent, the preparation method of which comprises the following steps:

[0035] Step 1: disperse 85 parts of fly ash into 200 parts of deionized water, and fully stir for 15 minutes to obtain a fly ash suspension;

[0036] Step 2: Add 2 parts of nano-graphene and 3 parts of nano-calcium stearate to the fly ash suspension, and stir for 20 minutes to obtain a mixed suspension;

[0037] Step 3: The above-mentioned mixed suspension and 0.2 parts of boric acid ester were mechanically activated and grafted in a planetary mill with a rotation speed of 500r / min for 6 hours, and the reaction temperature was controlled within the range of 80°C ± 10°C. After filtering Carry out low temperature drying to constant weight, drying temperature is 80 ℃. The dry matter is dispersed by high-speed stirring to obtain nano-modified inorganic mineral water repellent P1.

Embodiment 2

[0039] This embodiment provides a nano-modified inorganic mineral water repellent, the preparation method of which comprises the following steps:

[0040] Step 1: disperse 87 parts of heavy calcium powder into 240 parts of deionized water, and fully stir for 20 minutes to prepare heavy calcium powder suspension;

[0041] Step 2: Add 3 parts of nano-calcium stearate and 7 parts of nano-calcium carbonate to the heavy calcium powder suspension, and stir for 20 minutes to prepare a mixed suspension;

[0042] Step 3: The above-mentioned mixed suspension, 0.2 parts of stearic acid and 0.2 parts of titanate were subjected to mechanically activated grafting reaction for 8 hours in a planetary mill with a rotation speed of 450 r / min, and the reaction temperature was controlled at 70 ° C ± 10 Within the range of ℃, filter and dry at low temperature to constant weight, the drying temperature is 80 ℃. The dry matter is dispersed by high-speed stirring to obtain nano-modified inorganic mi...

Embodiment 3

[0044] This embodiment provides a nano-modified inorganic mineral water repellent, the preparation method of which comprises the following steps:

[0045] Step 1: Disperse 70 parts of fly ash and 25 parts of stone powder into 300 parts of deionized water and stir thoroughly for 10 minutes to prepare a mixed suspension of fly ash and stone powder;

[0046] Step 2: Add 5 parts of nano-calcium stearate to the mixed suspension of fly ash powder, and stir for 10 minutes to prepare the mixed suspension;

[0047] Step 3: The above-mentioned mixed suspension and 0.3 parts of aluminate coupling agent were subjected to mechanically activated grafting reaction in a ball mill with a rotation speed of 150 r / min for 8 hours, and the reaction temperature was controlled within the range of 80 ° C ± 10 ° C. After filtration Carry out low-temperature drying to constant weight, and the drying temperature is 70°C. The dry matter is dispersed by high-speed stirring to obtain nano-modified inorgan...

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Abstract

The invention relates to the field of concrete structure protection and waterproof mortar, in particular to a nano-modified inorganic mineral waterproof agent as well as a preparation method and application thereof. The nano modified inorganic mineral waterproof agent is prepared from the following raw materials: 80-95 parts of inorganic mineral powder; 2-10 parts of a nano material; 0 to 0.5 part of a coupling agent; the nano material is selected from one or more of nano graphene, nano stearate, nano calcium carbonate and nano titanium oxide. The nano-modified inorganic mineral waterproof agent provided by the invention is low in mixing amount when being used for preparing waterproof concrete or waterproof mortar, has better comprehensive performance while realizing an overall waterproof protection function, and meets the requirements of low cost and high performance of engineering.

Description

technical field [0001] The invention relates to the technical field of concrete structure protection and waterproof mortar, in particular to a nano-modified inorganic mineral waterproofing agent and its preparation method and application. Background technique [0002] Hydrophilicity and porous structure are important reasons why cement-based materials are extremely vulnerable to oxidation corrosion, ion erosion and freeze-thaw damage. In order to solve the problem that the durability of cement-based materials such as concrete and mortar is damaged by water erosion, the technical measures of coating the surface with waterproofing agent play a key role, but the defects of poor mechanics and durability of organic coatings lead to the protection of concrete structures and Waterproof mortar faces great challenges in practical application. Inorganic mineral waterproofing technology can perfectly make up for the defects of organic coating mechanics and durability, and can realize ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/08C04B24/40C04B103/65
CPCC04B40/0039C04B2103/65C04B18/08C04B14/022C04B24/085C04B24/006C04B14/28C04B24/40C04B14/02Y02W30/91
Inventor 王肇嘉涂玉波王帅房桂明陈旭峰白锡庆郑永超
Owner BEIJING BUILDING MATERIALS ACADEMY OF SCI RES
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