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CN-122010478-A - Preparation method of C2-level ceramic tile bonding mortar for improving sagging resistance and construction handfeel

CN122010478ACN 122010478 ACN122010478 ACN 122010478ACN-122010478-A

Abstract

The invention discloses a preparation method of C2-level ceramic tile bonding mortar for improving sagging resistance and construction handfeel, and relates to the field of building material chemistry and composite materials. The preparation method of the C2-level ceramic tile bonding mortar for improving the sagging resistance and the construction hand feeling comprises a dry mixing pre-dispersing stage, a staged wet mixing and homogenizing stage, a standing curing stage and a final activating stage. According to the preparation method of the C2-level ceramic tile bonding mortar for improving sagging resistance and construction handfeel, through the core effect of a wood fiber composite system, the traditional dilemma that high sagging resistance is accompanied with high construction resistance is broken, the yield stress and plastic viscosity of the new mortar are obviously reduced while the sagging resistance is maintained or even enhanced, the construction knife coating is smooth and labor-saving, the slurry is easy to spread, the surface is smooth and full, and the construction efficiency, quality and operation experience are greatly improved.

Inventors

  • YAN WEN
  • WEN KUNBO
  • Mo Liucheng

Assignees

  • 中建三局集团华南有限公司

Dates

Publication Date
20260512
Application Date
20251226

Claims (10)

  1. 1. The preparation method of the C2-level ceramic tile bonding mortar for improving sagging resistance and construction handfeel is characterized by comprising the following sequential steps of: S1, in a dry mixing and pre-dispersing stage, a cementing material matrix, an aggregate framework, an organic polymer reinforcing phase, a rheological property core regulating system, an early strength and function regulator and a fiber composite function system are put into a mixer, and are stirred to obtain a uniform dry mixture; S2, in a staged wet mixing and homogenizing stage, mixing water is added into the dry mixture, and the uniform viscous mortar primary product is obtained through low-speed wetting and stirring, wall scraping and cleaning and high-speed shearing and fine mixing; S3, standing and curing, namely sealing and standing the mortar initial product to enable the hydrophilic component to be fully hydrated and swelled; And S4, in a final activation stage, the cured mortar primary product is stirred at a short time and a thixotropic state of the adaptive construction is adjusted to obtain the tile bonding mortar.
  2. 2. The preparation method of the C2-level ceramic tile bonding mortar for improving the sagging resistance and the construction hand feeling according to claim 1 is characterized in that in the step S1, the components comprise, by weight, 32% -51% of a cementing material matrix, 40% -60% of an aggregate framework, 3% -10% of an organic polymer reinforcing phase, 0.11% -1.2% of a rheological property core regulating system, 0.5% -3.0% of an early strength and function regulator and 0.05% -0.5% of a fiber composite function system.
  3. 3. The preparation method of the C2-grade ceramic tile bonding mortar for improving the sagging resistance and the construction handfeel of the mortar according to claim 2 is characterized in that the cementing material matrix consists of 30-45% of main cement and 2-6% of active mineral admixture in terms of total weight; The main cement is one or more selected from silicate cement, aluminate cement and sulphoaluminate cement, and the grade is not lower than 42.5; The active mineral admixture is one or more selected from silica fume, metakaolin, granulated blast furnace slag powder and fly ash.
  4. 4. The method for preparing the C2-grade ceramic tile adhesive mortar for improving sagging resistance and construction handfeel according to claim 2, wherein the aggregate framework is selected from one or more of dry quartz sand, river sand and crushed limestone sand, and is compounded by adopting 40-70 mesh particles and 70-140 mesh particles, and the weight ratio of the two is 2:8-8:2.
  5. 5. The method for preparing the C2-grade tile adhesive mortar for improving sagging resistance and construction handfeel according to claim 2, wherein the organic polymer reinforcing phase is redispersible latex powder and is selected from one or more of vinyl acetate-ethylene copolymer, acrylic ester copolymer and ethylene-vinyl acetate-vinyl versatate copolymer, and the minimum film forming temperature is-5 ℃ to 10 ℃.
  6. 6. The preparation method of the C2-level ceramic tile bonding mortar for improving the sagging resistance and construction handfeel is characterized in that the rheological property core adjusting system consists of a water retention and structural thickening subsystem and a sagging resistance and thixotropic fine adjusting subsystem, wherein the water retention and structural thickening subsystem is 0.1-1.0% and the sagging resistance and thixotropic fine adjusting subsystem is 0.01-0.2% in terms of total weight; the main component of the water-retaining and structure-thickening subsystem is cellulose ether, the cellulose ether is one or more of hydroxypropyl methyl cellulose ether and hydroxyethyl methyl cellulose ether, and the viscosity is 20000-200000 ; The main component of the anti-sagging and thixotropic fine adjustment subsystem is starch ether or an organic thixotropic agent, and the organic thixotropic agent is one or more selected from polyamide wax and modified bentonite.
  7. 7. The method for preparing the C2-level ceramic tile adhesive mortar for improving the sagging resistance and the construction handfeel according to claim 2, wherein the fiber composite functional system takes wood fiber as an essential component, and the mass ratio of the wood fiber in the fiber composite functional system is not less than 20 percent and can be compounded with one or more of polypropylene fiber and polyvinyl alcohol fiber; The length of the wood fiber is 100-800 mu m, the surface of the wood fiber is porous and hydrophilic, and the wood fiber can form a three-dimensional micro-skeleton in slurry and regulate water distribution.
  8. 8. The method for preparing the C2-grade tile adhesive mortar for improving sagging resistance and construction handfeel according to claim 2, wherein the early strength and function regulator is one or more selected from calcium formate and calcium nitrate.
  9. 9. The method for preparing the C2-grade tile adhesive mortar for improving sagging resistance and construction feel according to claim 1, wherein in the step S2: the low-speed wetting stirring rotating speed is 120-160 revolutions per minute, and the stirring time is 1-2 minutes; The high-speed shearing and fine mixing rotating speed is 250-300 rpm, and the stirring time is 1.5-3 minutes; The mixing water is added in an amount to control the water-cement ratio between 0.20 and 0.28.
  10. 10. The method for preparing the C2-level ceramic tile adhesive mortar for improving the sagging resistance and the construction handfeel according to claim 1, wherein the mixer in the step S1 is a gravity-free mixer or a coulter type mixer, the stirring speed is 120-160 revolutions per minute, and the stirring time is 2-4 minutes; in the step S3, standing and curing time is 1-3 minutes; in the step S4, the high-speed stirring rotating speed is 250-300 rpm, and the stirring time is 15-45 seconds.

Description

Preparation method of C2-level ceramic tile bonding mortar for improving sagging resistance and construction handfeel Technical Field The invention relates to the field of building material chemistry and composite materials, in particular to a preparation method of C2-level ceramic tile bonding mortar for improving sagging resistance and construction handfeel. Background With the development of the building decoration industry, the large-size and low-water-absorption ceramic tile has both aesthetic property and practicality, and is increasingly widely applied in various decoration scenes. The sticking of the ceramic tile brings stringent requirements to the ceramic tile bonding mortar, not only meets the hard regulations of C2 level and above standards on strength, flexibility and anti-slip performance, but also meets the operation requirements in the actual construction process, and ensures the construction efficiency and the sticking quality. In order to achieve the performance index of C2 grade and above, a plurality of component regulation and control means are generally adopted in the prior art to improve the mortar performance, wherein the improvement of anti-sagging and anti-slip performance is aimed at, the core mode is to add a thickening component and a thixotropic agent, and a typical scheme is to select high-viscosity cellulose ether to strengthen the water retention and basic thickening effect, and match with the thixotropic agent such as starch ether to further improve the anti-slip capability. Although the means can meet the performance requirements of sagging resistance and sliding resistance to a certain extent, the technical dilemma that is difficult to break through is overcome, namely the contradiction between sagging resistance and construction smoothness cannot be effectively reconciled. Specifically, in order to ensure that mortar does not hang down and the tile does not slip during the process of pasting the large-size tile, the viscosity or the dosage of cellulose ether is generally increased or the addition proportion of thixotropic agent is increased in the prior art. But this adjustment can lead to the consistence of new mortar to show to increase, and inside cohesion and viscous resistance promote by a wide margin, and constructor can feel strong "damping sense" when spreading, and the operation is hard and inefficiency, is difficult to guarantee that the mortar spreads evenly, probably even influences the bonding stability of ceramic tile and basic unit because of construction operation is improper. Conversely, if the consumption of thickening components or thixotropic agents is reduced to reduce the construction resistance and improve the construction smoothness, the insufficient anti-sagging performance of mortar can be directly caused, the problems of sagging of mortar, slippage of the tile and the like are easy to occur when large-size tiles are pasted, and the core performance requirement of C2-level products can not be met. Disclosure of Invention The invention aims to provide a preparation method of C2-level ceramic tile bonding mortar for improving sagging resistance and construction handfeel, so as to solve the problems in the prior art. In order to achieve the aim, the invention provides the following technical scheme that the preparation method of the C2-level ceramic tile bonding mortar for improving the sagging resistance and the construction hand feeling comprises the following sequential steps: S1, in a dry mixing and pre-dispersing stage, a cementing material matrix, an aggregate framework, an organic polymer reinforcing phase, a rheological property core regulating system, an early strength and function regulator and a fiber composite function system are put into a mixer, and are stirred to obtain a uniform dry mixture; S2, in a staged wet mixing and homogenizing stage, mixing water is added into the dry mixture, and the uniform viscous mortar primary product is obtained through low-speed wetting and stirring, wall scraping and cleaning and high-speed shearing and fine mixing; S3, standing and curing, namely sealing and standing the mortar initial product to enable the hydrophilic component to be fully hydrated and swelled; And S4, in a final activation stage, the cured mortar primary product is stirred at a short time and a thixotropic state of the adaptive construction is adjusted to obtain the tile bonding mortar. Preferably, in the step S1, the components comprise 32-51% of a cementing material matrix, 40-60% of an aggregate framework, 3-10% of an organic polymer reinforcing phase, 0.11-1.2% of a rheological property core regulating system, 0.5-3.0% of an early strength and function regulator and 0.05-0.5% of a fiber composite function system according to the total weight ratio. Preferably, the cementing material matrix consists of 30-45% of main cement and 2-6% of active mineral admixture by total weight; The main cement is one or more selected from silica