CN115368083B - JS waterproof paint and preparation method and application thereof - Google Patents

Abstract

The invention discloses a JS waterproof paint which comprises powder and liquid, wherein the powder comprises the following components in parts by weight: 30-45% of Portland cement; 5-10% of fly ash; 50-65% of tailing sand; 0.1 to 0.3 percent of early strength agent; 0.05-0.3% of dry powder water reducer; 0.1-0.3% of dry powder defoaming agent; cellulose ether 0.01-0.05%; the liquid comprises the following components in parts by weight: 5-10% of water; 90-95% of emulsion; 0.1-0.3% of defoaming agent; 0.1-0.3% of bactericide; 0.1-0.3% of water reducer; wherein the weight ratio of the liquid material to the powder material is =1: (1.2-1.6). The JS waterproof paint disclosed by the invention has excellent mechanical property, can meet GB/T23445-2009 type II standard, is high in drying speed, can effectively shorten the construction period, and has high use value.

Description

JS waterproof paint and preparation method and application thereof

Technical Field

The invention relates to the technical field of high polymer materials, in particular to a JS waterproof paint and a preparation method and application thereof.

Background

The JS waterproof paint is a kind of water-proof paint of polymer cement, which is prepared by using polyacrylate emulsion, ethylene-vinyl acetate copolymer emulsion and cement as main raw materials, adding filler and other auxiliary agent, and solidifying and forming film through water evaporation and cement hydration reaction. At present, a large amount of quartz sand and quartz powder are required to be used as aggregate in powder materials in the water-proof JS coating product on the market, so that the effect of filling coating gaps is achieved. However, the quartz sand and the quartz powder consume a great deal of manpower and material resources in the crushing process, seriously damage the natural environment, cause dust pollution and other problems, and greatly increase the environmental protection pressure. Therefore, how to reduce the use of quartz sand and quartz powder is a problem to be solved.

Tailings are components which are produced in mineral processing operations and have low content of useful components and cannot be economically used for industrial production at present, and are also main components in industrial solid wastes. At present, the tailing accumulation amount in China is quite huge, and most of the tailings and waste stones are tailings and waste stones generated by the mining and separation of iron ores, copper ores, gold ores and phosphorite. The piled tailings not only have great pollution to the environment and waste a large amount of land, but also have serious potential safety hazards (such as extremely easy debris flow danger in the rainwater season, pollution of the tailings along with rainwater infiltration for drinking fresh water resources and the like). Therefore, the comprehensive recycling of tailing resources is necessary. The main mineral components of the tailings are various gangue minerals such as quartz, feldspar, pyroxene, amphibole and the like, and the main chemical components are oxides and silicates of Si, ca, fe, al, zn and other elements, and are mainly applied to building materials (for example, used for manufacturing cement, tiles, concrete aggregates and the like, or used for building roads and the like).

In the prior art, tailings have been studied for use in water-resistant coatings. Chinese patent application CN113896486A discloses that fine-grained copper tailings with the mesh of-100 to +400 are adopted to replace heavy calcium powder produced by traditional natural water-washed river sand and natural ore, so as to prepare a waterproof coating material; however, according to the embodiment data, the mechanical property of the waterproof coating material cannot reach the GB/T23445-2009 II type standard, the practical application value is not high, and the waterproof coating material has the problem of low drying speed, long construction period and influence on the construction efficiency.

Therefore, the invention mainly researches how to reasonably utilize tailing resources in JS waterproof paint products, effectively reduces the use of cement, quartz sand and quartz powder, can ensure each performance of JS waterproof paint, and meets the actual use requirements.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide the JS waterproof paint which has excellent mechanical properties (tensile strength is more than 2.5Mpa, elongation at break is more than or equal to 120%, bonding strength is more than 1 Mpa), can meet GB/T23445-2009 type II standard, is high in drying speed, can effectively shorten construction period, and has high use value.

The invention also aims to provide a preparation method of the JS waterproof paint.

The invention is realized by the following technical scheme:

a JS waterproof paint, which comprises powder and liquid,

the powder comprises the following components in parts by weight:

30-45 parts of silicate cement;

5-10 parts of fly ash;

50-65 parts of tailing sand;

0.1-0.3 part of early strength agent;

0.05-0.3 part of dry powder water reducer;

0.1-0.3 part of dry powder defoamer;

cellulose ether 0.01-0.05 parts;

the liquid comprises the following components in parts by weight:

5-10 parts of water;

90-95 parts of emulsion;

0.1-0.3 part of defoaming agent;

0.1-0.3 part of bactericide;

0.1-0.3 part of water reducer;

wherein the weight ratio of the liquid material to the powder material is =1: (1-2); preferably, the weight ratio of the liquid material to the powder material is =1: (1.2-1.6).

According to the invention, a certain amount of fly ash is added into the powder component, so that the consumption of cement can be greatly reduced, meanwhile, the workability and the construction property of cement can be well improved by the vitrified microbeads formed by high-temperature calcination in the fly ash, the aperture of a waterproof coating film is effectively filled, the compactness of the coating film is improved, and the tensile strength mechanical property and the waterproof effect of the coating are ensured. Preferably, the fly ash is 200-400 mesh.

The tailing sand is selected from any one or more of gold tailing sand and iron tailing sand. Preferably, the weight ratio of the iron tailings to the gold tailings in the tailing sand is (2-3.5): 1.

preferably, the tailings sand is 50-200 mesh. The tailing sand is the ore with the lowest grade of useful minerals left after ore dressing or other comprehensive treatment, and the tailing sand with the required particle size is obtained after screening and drying.

The early strength agent in the powder is selected from any one or more of calcium formate or lithium carbonate. The addition of the early strength agent can effectively promote the hydration speed of dicalcium silicate and tricalcium silicate in cement, thereby improving the early strength of cement.

Preferably, the early strength agent is calcium formate and lithium carbonate according to the weight ratio of (2-12): 1, compounding; more preferably, the early strength agent is calcium formate and lithium carbonate according to the weight ratio of (4-6): 1. According to the invention, the early strength agent compounded by calcium formate and lithium carbonate according to a certain proportion is selected, so that the drying rate is obviously improved, and meanwhile, the mechanical property of the coating can be effectively improved.

Preferably, the dry powder defoamer in the powder is refined by simethicone, silicone resin, a carrier and a compounding agent. In particular, the dry powder defoamer includes, but is not limited to, ming Ling Chemie P803. According to the invention, a certain amount of dry powder defoamer is added into the powder, so that bubbles generated in the mixing process of the liquid material and the powder can be eliminated, and the compactness and the workability of the slurry in the construction process are effectively improved.

Preferably, the dry powder water reducer in the powder is selected from any one or more of dry powder polycarboxylate water reducer, melamine water reducer or lignosulfonate. And a certain amount of water reducer is added into the powder, so that the surface tension can be effectively reduced, and the powder is more easily and fully dispersed in the liquid material.

Preferably, the cellulose ether is selected from any one or more of hydroxyethyl methyl cellulose ether and hydroxypropyl methyl cellulose ether. The addition of the cellulose ether can increase the water retention performance of the material, so that the cement in the slurry fully participates in hydration reaction, and the tensile strength mechanical property of the coating film is ensured; meanwhile, the cellulose ether can adjust the viscosity of the slurry to be moderate, so that the slurry has a certain sagging resistance effect. Preferably, the viscosity of the cellulose ether is 1000 mPa.S-10000 mPa.S. The viscosity test method comprises the following steps: the viscosity of the liquid was measured using a 2% purified water solution of cellulose ether (2 g cellulose ether +98g purified water with stirring and melting) and then using a brookfield viscosity tester.

Preferably, the emulsion in the liquid material is selected from any one or more of acrylic emulsion, styrene-acrylic ester emulsion or styrene-butadiene emulsion.

Preferably, the defoaming agent in the liquid material is selected from any one or more of organosilicon defoaming agents or mineral oil defoaming agents.

Preferably, the bactericide in the liquid material is selected from isothiazolinone bactericides.

Preferably, the water reducing agent in the liquid material is selected from polycarboxylate water reducing agents.

The invention also provides a preparation method of the JS waterproof paint, which comprises the following steps:

(1) Preparing powder: adding silicate cement, fly ash and tailing sand into a mixer according to the proportion, uniformly mixing, adding an early strength agent, a dry powder water reducing agent, a dry powder defoaming agent and cellulose ether, and mixing at a high speed for 10-20min to obtain powder;

(2) Preparing liquid: adding the emulsion and water into a stirring container according to the proportion, starting stirring, and stirring for 10-20 min; then adding bactericide and reserved water, then adding defoamer and water reducer, and stirring for 20-30min; during discharging, filtering and discharging by using a 100-mesh filter screen to prepare liquid material;

(3) And fully and uniformly mixing the liquid material and the powder material according to a certain proportion to prepare the JS waterproof paint.

Preferably, in the step (2), the part of water is 40% -90% of the total mass of the added water.

The invention also provides application of the JS waterproof paint in a waterproof coating of a building.

The invention has the following beneficial effects:

(1) The JS waterproof paint disclosed by the invention has excellent mechanical property, can meet GB/T23445-2009 type II standard, is high in drying speed, can effectively shorten the construction period, and has high use value.

(2) According to the formula of the JS waterproof paint, the specific tailing sand is adopted to replace the traditional quartz sand and quartz powder, so that the reasonable utilization of tailing resources is realized, a certain amount of fly ash is matched, the addition amount of cement is greatly reduced, and compared with the traditional JS waterproof paint, the JS waterproof paint has the advantages of better mechanical property, lower carbon and environmental protection.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.

The raw materials used in the examples and comparative examples of the present invention are described below, but are not limited to these materials:

powder component raw materials:

portland cement 1:42.5R, conch Cement Co., ltd;

portland cement 2:52.5R, conch Cement Co., ltd;

fly ash 1:200 meshes;

fly ash 2:400 mesh;

fly ash 3:100 mesh;

fly ash 4:600 mesh;

tailing sand 1: iron tailings, 100 mesh;

tailing sand 2: gold tailings, 100 mesh;

early strength agent 1: calcium formate and lithium carbonate in the weight ratio of 2:1, compounding;

early strength agent 2: the weight ratio of calcium formate to lithium carbonate is 6:1, compounding;

early strength agent 3: the weight ratio of calcium formate to lithium carbonate is 12:1, compounding;

early strength agent 4: calcium formate, building materials, inc.;

early strength agent 5: lithium carbonate, building materials, inc.;

dry powder water reducer: carboxylic acid water reducer, basf;

dry powder defoamer: ming Ling Chem P803;

cellulose ether 1:4000 mPa.S, shandong Heda Co., ltd;

cellulose ether 2: 800 mPa.S, shandong Heda Co., ltd;

cellulose ether 3:12000 mPa.S, shandong Heda Co., ltd;

quartz sand: 100 mesh.

The chemical compositions of the fly ash and the tailing sand used in the examples and comparative examples of the present invention are shown in the following table:

liquid material component raw materials:

water:

emulsion 1: acrylic emulsion containing 55.+ -. 1wt% solids, guangdong BaderFu Co., ltd;

emulsion 2: styrene-butadiene emulsion with solid content of 55+/-1 wt% and Basoff;

defoaming agent: silicone defoamer, basf;

a bactericide: isothiazolinones, dow chemistry;

water reducing agent: polycarboxylic acid water reducer and basf.

Preparation methods of examples and comparative examples:

(1) Preparing powder: adding silicate cement, fly ash and tailing sand into a mixer according to the proportion, uniformly mixing, adding an early strength agent, a dry powder water reducing agent, a dry powder defoaming agent and cellulose ether, and mixing at a high speed for 10-20min to obtain powder;

(2) Preparing liquid: adding the emulsion and a part of water (90% of the total mass of the added water) into a stirring container according to the proportion, starting stirring, and stirring for 10-20 min; then adding the bactericide and the reserved other part of water, then adding the defoamer and the water reducer, and stirring for 20-30min; during discharging, filtering and discharging by using a 100-mesh filter screen to prepare liquid material;

(3) And fully and uniformly mixing the liquid material and the powder material according to a certain proportion to prepare the JS waterproof paint.

Correlation performance test:

the JS waterproof paint prepared by the test examples and the comparison examples is tested for tensile strength, elongation at break, bonding strength and drying time by referring to the standards GB/T23445-2009 and GB/T16777-2008.

GB/T23445-2009 type ii standard requires: the tensile strength (without treatment) is more than or equal to 1.8Mpa; the elongation at break (without treatment) is more than or equal to 80 percent, and the bonding strength (without treatment) is more than or equal to 0.7Mpa.

Table 1: the JS waterproof paint of examples 1-8 comprises the components in parts by weight

Table 2: the JS waterproof paint of examples 9-16 comprises the components in parts by weight

Table 3: the JS waterproof paint of examples 17-19 and comparative examples 1-3 were prepared from the components (in parts by weight)

Table 4: test results of the properties of the JS waterproof paint of examples 1-19 and comparative examples 1-3

From the results, the JS waterproof paint disclosed by the invention has excellent mechanical properties, can meet GB/T23445-2009 II type standard, is high in drying speed, can effectively shorten the construction period, and has high use value.

Comparative example 1 compared with example 1, without fly ash addition, the drying rate was slower and the mechanical properties were poorer.

Comparative example 2 was inferior to example 1 in mechanical properties such as tensile strength, elongation at break and adhesive strength, without addition of an early strength agent, and at a low drying rate.

Compared with the example 1, the JS waterproof paint prepared by adopting quartz sand has the same performance as the JS waterproof paint prepared by the example 1, and the JS waterproof paint formula provided by the invention can effectively replace the traditional quartz sand and quartz powder by adopting specific tailing sand, can meet the requirement of actual use performance, realizes reasonable utilization of tailing resources, and is lower in carbon and environment-friendly.

Claims (8)

1. A JS waterproof paint comprises powder and liquid, and is characterized in that,

the powder comprises the following components in parts by weight:

30-45 parts of silicate cement;

5-10 parts of fly ash;

50-65 parts of tailing sand;

0.1-0.3 part of early strength agent;

0.05-0.3 part of dry powder water reducer;

0.1-0.3 part of dry powder defoamer;

cellulose ether 0.01-0.05 parts;

the pulverized fuel ash is 200-400 meshes;

the weight ratio of the iron tailings to the gold tailings in the tailing sand is (2-3.5): 1, a step of;

the early strength agent is calcium formate and lithium carbonate according to the weight ratio of (2-12): 1, compounding;

the viscosity of the cellulose ether is 1000 mPa.S-10000 mPa.S;

the liquid comprises the following components in parts by weight:

5-10 parts of water;

90-95 parts of emulsion;

0.1-0.3 part of defoaming agent;

0.1-0.3 part of bactericide;

0.1-0.3 part of water reducer;

wherein the weight ratio of the liquid material to the powder material is =1: (1.2-1.6).

2. The JS waterproof paint of claim 1, wherein the tailings sand is 50-200 mesh.

3. The JS waterproof paint of claim 1, wherein the early strength agent is calcium formate and lithium carbonate in the weight ratio (4-6): 1.

4. The JS waterproof paint of claim 1, wherein the dry powder defoamer in the powder is prepared from simethicone, silicone, a carrier and a complexing agent; the dry powder water reducer in the powder is selected from any one or more of dry powder polycarboxylate water reducer, melamine water reducer or lignosulfonate.

5. The JS waterproof paint as claimed in claim 1, characterized in that the cellulose ether is selected from any one or more of hydroxyethyl methyl cellulose ether or hydroxypropyl methyl cellulose ether.

6. The JS waterproof paint as claimed in claim 1, wherein the emulsion in the liquid material is selected from any one or more of acrylic emulsion, styrene-acrylate emulsion or styrene-butadiene emulsion; the defoaming agent in the liquid material is selected from any one or more of organic silicon defoaming agents or mineral oil defoaming agents; the bactericide in the liquid material is selected from isothiazolinone bactericides; the water reducer in the liquid material is selected from polycarboxylate water reducer.

7. The method for producing a JS waterproof paint as claimed in any one of claims 1-6, including the steps of:

(1) Preparing powder: adding silicate cement, fly ash and tailing sand into a mixer according to the proportion, uniformly mixing, adding an early strength agent, a dry powder water reducing agent, a dry powder defoaming agent and cellulose ether, and mixing at a high speed for 10-20min to obtain powder;

(2) Preparing liquid: adding the emulsion and a part of water into a stirring container according to the proportion, starting stirring, and stirring for 10-20 min; then adding the bactericide and the reserved other part of water, then adding the defoamer and the water reducer, and stirring for 20-30min; during discharging, filtering and discharging by using a 100-mesh filter screen to prepare liquid material;

(3) And fully and uniformly mixing the liquid material and the powder material according to a certain proportion to prepare the JS waterproof paint.

8. Use of the JS waterproof paint as claimed in any one of claims 1-6 in waterproof coating of buildings.