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CN-121991542-A - Preparation method of color mortar coating for permeable concrete base surface

CN121991542ACN 121991542 ACN121991542 ACN 121991542ACN-121991542-A

Abstract

The invention discloses a preparation method of a color mortar coating for a permeable concrete base surface, which comprises the following steps of (1) uniformly mixing red mud powder and/or red brick micropowder, waste glass powder and nano silicon dioxide, then sintering to melt the glass powder, cooling to room temperature, crushing and screening to obtain modified pigment fine aggregate. (2) Adding sepiolite particles into an ethyl orthosilicate-absolute ethyl alcohol mixed solution, performing ultrasonic treatment, separating sepiolite, and drying to obtain pretreated sepiolite. And (3) soaking the sepiolite in water to be saturated, and then carrying out solid-liquid separation to obtain the modified sepiolite. (3) The color mortar coating is prepared by taking silicate cement, fine aggregate, modified pigment fine aggregate, modified sepiolite, water reducer and mixing water as raw materials and uniformly mixing the raw materials. The method of the invention not only effectively avoids the problems of easy abrasion and fading of the pigment, but also prevents the adverse effect on the water permeability of the permeable concrete matrix.

Inventors

  • WEN HUAPING
  • WANG JIANBIN
  • XIAO XUE
  • LIU GEMING
  • LI XI

Assignees

  • 江西省萍乡市建筑设计院有限责任公司

Dates

Publication Date
20260508
Application Date
20260212

Claims (10)

  1. 1. The preparation method of the color mortar coating for the permeable concrete base surface is characterized by comprising the following steps of: (1) Uniformly mixing red mud powder and/or red brick micropowder, waste glass powder and nano silicon dioxide, sintering to melt the glass powder, cooling to room temperature, crushing and screening to obtain modified pigment fine aggregate; (2) Adding sepiolite particles into an ethyl orthosilicate-absolute ethyl alcohol mixed solution, performing ultrasonic treatment, separating sepiolite, and drying to obtain pretreated sepiolite; (3) The color mortar coating is prepared by taking silicate cement, fine aggregate, the modified pigment fine aggregate, the modified sepiolite, a water reducing agent and mixed water as raw materials and uniformly mixing the raw materials.
  2. 2. The method for preparing the color mortar paint for the permeable concrete base surface according to claim 1, wherein in the step (1), the proportion of the red mud powder and/or the red brick micro powder, the waste glass powder and the nano silicon dioxide is 7.5-8.2 parts by weight, 9-11 parts by weight and 2-2.6 parts by weight.
  3. 3. The method for preparing the color mortar paint for the permeable concrete base surface according to claim 1, wherein in the step (1), the fineness of the red mud powder and/or the red brick micro powder and the waste glass powder is 200-300 meshes.
  4. 4. The method for preparing the color mortar coating for the permeable concrete base surface according to claim 1, wherein in the step (1), the sintering temperature is 30-50 ℃ higher than the softening temperature of the waste glass powder, the sintering time is 20-35 min, and optionally, in the step (1), the particle size of the modified pigment fine aggregate is 0.5-1 mm.
  5. 5. The method for preparing a color mortar coating for a pervious concrete base surface according to claim 1, wherein in the step (2), the ratio of the sepiolite particles to the ethyl orthosilicate-absolute ethyl alcohol mixed solution is 1 g:10-15 mL, and optionally, the particle size of the sepiolite particles is 1-2 mm.
  6. 6. The method for preparing the color mortar paint for the permeable concrete base surface according to claim 1, wherein in the step (2), the volume ratio of the tetraethoxysilane to the absolute ethyl alcohol is 1:1.5-2.
  7. 7. The method for preparing the color mortar paint for the permeable concrete base surface according to claim 1, wherein in the step (2), the ultrasonic treatment time is 10-20 mL, and optionally, the drying temperature is 60-70 ℃ and the time is not less than 10min.
  8. 8. The method for preparing a color mortar coating for a pervious concrete base surface according to claim 1, wherein in the step (2), the ratio of the pretreated sepiolite to water is 1 g:25-40 mL.
  9. 9. The method for preparing the color mortar paint for the permeable concrete base surface according to any one of claims 1 to 8, wherein in the step (3), the proportion of each component in the raw materials is 100 to 115 parts by weight of Portland cement, 80 to 98 parts by weight of fine aggregate, 70 to 79 parts by weight of modified pigment fine aggregate, 21 to 27 parts by weight of modified sepiolite and 1.2 to 1.6 parts by weight of water reducer, and the mass ratio of mixing water to Portland cement is 0.3 to 0.4:1.
  10. 10. The method for preparing a color mortar coating for a permeable concrete base according to any one of claims 1 to 8, wherein in the step (3), the fine aggregate comprises at least one of river sand and quartz sand; Optionally, in the step (3), the grain size of the fine aggregate is 0.3-0.6 mm; Optionally, in the step (3), the water reducer comprises at least one of a polycarboxylate water reducer, a naphthalene water reducer, an aliphatic water reducer and a lignosulfonate water reducer.

Description

Preparation method of color mortar coating for permeable concrete base surface Technical Field The invention relates to the technical field of pervious concrete, in particular to a preparation method of a color mortar coating for a pervious concrete base surface. Background The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art. The pervious cement concrete is concrete with a void ratio of 15% or more, also called porous concrete, which does not contain fine aggregate, and is a honeycomb structure with uniformly distributed holes formed by mutually bonding coarse aggregate and cement paste, so that the pervious cement concrete has the characteristics of water drainage, skid resistance, sound absorption, noise reduction and the like. The good water permeability of the composite material is widely applied to occasions such as sponge cities, landscape engineering, ecological slope protection and the like, but the composite material has the defects of single surface color and insufficient aesthetic property, and is difficult to meet personalized requirements. In order to solve the problems, the prior art mainly adopts two schemes, namely (1) directly doping pigment into a pervious concrete matrix, but the method has the problems of high cost (a large amount of pigment is needed and the matrix material is used in large amount), easy fading in the later period and the like. (2) The method can quickly color the pervious concrete surface by brushing paint coloring products, but has the problems of poor environmental protection (VOC is contained, the environment is polluted and the human health is endangered), easy abrasion, weak weather resistance, fading in a short term and the like. Meanwhile, the porous surface layer of the pervious concrete can be blocked in the mode, so that the water permeability is reduced. Disclosure of Invention Aiming at the problems, the invention discloses a preparation method of a color mortar coating for a pervious concrete base surface, which not only effectively avoids the problems of easy abrasion and fading of pigment, but also prevents adverse effects on the water permeability of a pervious concrete matrix. Specifically, the technical scheme of the invention is as follows. A preparation method of color mortar paint for permeable concrete base surface comprises the following steps: (1) Uniformly mixing red mud powder and/or red brick micropowder, waste glass powder and nano silicon dioxide, sintering to melt the glass powder, cooling to room temperature, crushing and screening to obtain the modified pigment fine aggregate. (2) Adding sepiolite particles into an ethyl orthosilicate-absolute ethyl alcohol mixed solution, performing ultrasonic treatment, separating sepiolite, and drying to obtain pretreated sepiolite. And (3) soaking the sepiolite in water to be saturated, and then carrying out solid-liquid separation to obtain the modified sepiolite. (3) The color mortar coating is prepared by taking silicate cement, fine aggregate, the modified pigment fine aggregate, the modified sepiolite, a water reducing agent and mixed water as raw materials and uniformly mixing the raw materials. In the step (1), the proportion of the red mud powder and/or the red brick micropowder, the waste glass powder and the nano silicon dioxide is 7.5-8.2 parts by weight, 9-11 parts by weight and 2-2.6 parts by weight. In the step (1), the fineness of the red mud powder and/or the red brick micro powder and the waste glass powder is 200-300 meshes. Further, in the step (1), the sintering temperature is 30-50 ℃ higher than the softening temperature of the waste glass powder, and the sintering time is 20-35 min. Further, in the step (1), the particle size of the modified pigment fine aggregate is 0.5-1 mm. In the step (2), the ratio of the sepiolite particles to the ethyl orthosilicate-absolute ethyl alcohol mixed solution is 1 g:10-15 mL. Optionally, the sepiolite particles have a particle size of 1-2 mm. Further, in the step (2), the volume ratio of the tetraethoxysilane to the absolute ethyl alcohol is 1:1.5-2. Further, in the step (2), the ultrasonic treatment time is 10-20 mL. Optionally, the drying temperature is 60-70 ℃ and the drying time is not less than 10min. Further, in the step (2), the ratio of the pretreated sepiolite to water is 1 g:25-40 mL. In the step (3), the raw materials comprise 100-115 parts of Portland cement, 80-98 parts of fine aggregate, 70-79 parts of modified pigment fine aggregate, 21-27 parts of modified sepiolite and 1.2-1.6 parts of water reducer, wherein the mass ratio of mixing water to Portland cement is 0.3-0.4:1. Further, in the step (3), the fine aggregate comprises at least one of river sand, quartz sand and the like.