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CN-121136468-B - Rare earth tailing modified emulsified asphalt grouting material and application thereof

CN121136468BCN 121136468 BCN121136468 BCN 121136468BCN-121136468-B

Abstract

The invention relates to the technical field of waterproof paint, in particular to a rare earth tailing modified emulsified asphalt grouting material and application thereof. The asphalt grouting material comprises a modified emulsified asphalt composition, wherein the modified emulsified asphalt composition comprises asphalt and a modified component, the modified component comprises, by weight, 300-1200 parts of SBR emulsion, 75-250 parts of SBR emulsion and 3-24 parts of rare earth tailings, and a coupling agent. The invention adopts the rare earth tailings to modify the emulsified asphalt, and the obtained modified emulsified asphalt can be better deposited on an interface in a demulsification stage, has higher interface adhesion and water resistance, and has important application value in the field of emulsified asphalt grouting materials.

Inventors

  • CHEN YONG
  • HUANG ZUXING
  • HUANG BOCHUN

Assignees

  • 佛山市科顺建筑材料有限公司

Dates

Publication Date
20260505
Application Date
20251028

Claims (15)

  1. 1. A modified emulsified asphalt composition comprises asphalt, a modifying component and an emulsifying component, and is characterized in that the modifying component comprises elastomer emulsion, rare earth tailings and a coupling agent; the modified emulsified asphalt composition comprises 300-1200 parts of asphalt, 75-250 parts of elastomer emulsion and 3-24 parts of rare earth tailings; The emulsified component comprises an emulsifying agent, water and one or more of a stabilizing agent, a pH regulator or a saponification agent, wherein the mass ratio of the asphalt to the emulsified component is (1.8-2.4): 1.
  2. 2. The modified emulsified asphalt composition as set forth in claim 1, wherein the asphalt is 400 to 900 parts by weight, the elastomer emulsion is 90 to 175 parts by weight, and the rare earth tailings are 4 to 18 parts by weight.
  3. 3. The modified emulsified asphalt composition as set forth in claim 2, wherein the asphalt is 500 to 700 parts by weight, the elastomer emulsion is 110 to 140 parts by weight, and the rare earth tailings are 5 to 14 parts by weight.
  4. 4. The modified-emulsified asphalt composition as set forth in claim 1, wherein the asphalt is 50# asphalt, 70# asphalt, 90# asphalt or 100# asphalt, and/or, The elastomer emulsion comprises one or more of SBR emulsion, CR emulsion, NR emulsion or NVR emulsion, and/or, The rare earth tailings are light rare earth tailings.
  5. 5. The modified emulsified asphalt composition as set forth in claim 4, wherein the asphalt is 70# asphalt, and/or, The elastomer emulsion is SBR emulsion, and/or, The rare earth tailings comprise lanthanum, cerium, neodymium, samarium, yttrium and gadolinium.
  6. 6. The modified emulsified asphalt composition as set forth in claim 5, wherein the total mass of light rare earth elements in the rare earth tailings is 90% or more of the total rare earth elements.
  7. 7. The modified emulsified asphalt composition as set forth in any one of claims 1 to 6, wherein the coupling agent includes one or more of a silane coupling agent, a titanate coupling agent, an aluminate coupling agent, a zirconate coupling agent, or a polymeric coupling agent.
  8. 8. The modified emulsified asphalt composition as set forth in claim 7, wherein the coupling agent is a silane coupling agent.
  9. 9. The modified emulsified asphalt composition as set forth in claim 8, wherein the mass ratio of the coupling agent to the rare earth tailings is 1 (1000-3000).
  10. 10. The method for preparing the modified emulsified asphalt composition as set forth in any one of claims 1 to 9, comprising the steps of uniformly mixing a coupling agent, ethanol and water according to a predetermined ratio, and drying the mixture on the surface of the rare earth tailings to obtain surface modified rare earth tailings; mixing asphalt and the surface modified rare earth tailings at 145-160 ℃ and shearing at high speed to obtain a melt blending phase; mixing water, an emulsifying component and an elastomer emulsion to obtain a soap liquid phase; And mixing the melt blending phase and the soap liquid phase to obtain the modified emulsified asphalt composition.
  11. 11. An asphalt slurry comprising the modified emulsified asphalt composition as set forth in any one of claims 1 to 6.
  12. 12. The asphalt cement according to claim 11, wherein the mass percentage of the modified emulsified asphalt composition in the asphalt cement is 30 to 45%.
  13. 13. The asphalt grouting material according to claim 11 or 12, further comprising functional auxiliary agents, demulsifiers, fillers and water; The demulsifier comprises polyvinyl alcohol and calcium chloride, and the mass percentage of the demulsifier in the asphalt grouting material is 2-7.5%.
  14. 14. The asphalt grouting material of claim 13, wherein the functional auxiliary agent comprises one or more of an antifoaming agent, a preservative, a thickener and a pH regulator, and the mass percentage of the functional auxiliary agent in the asphalt grouting material is 0.5-1.5%.
  15. 15. Use of the asphalt grouting material according to any one of claims 11-14 for waterproofing of road works, bridge works, construction works, hydraulic works, underground works or tunnel works.

Description

Rare earth tailing modified emulsified asphalt grouting material and application thereof Technical Field The invention relates to the technical field of waterproof paint, in particular to a rare earth tailing modified emulsified asphalt grouting material and application thereof. Background Asphalt grouting material refers to asphalt or modified asphalt material for waterproof and seepage-proof grouting. The asphalt grouting and plugging mechanism is to heat asphalt to proper temperature to make it possess certain flowability, to convey it to the leaking part via heat resisting pump and conveying pipeline, to make asphalt and water insoluble, to cool hot asphalt, the asphalt is continuously poured in, continuously condensed and spread, gradually adhered to the seam wall, and continuously contracted until completely blocked along with the continuous thickening of the asphalt adhesion layer. However, this method has a disadvantage that it is difficult to solve, that is, the temperature required for heating the asphalt is high and the viscosity of the asphalt after heating is high. Emulsified asphalt is an unstable mixed system of asphalt and water, has water flowing property at normal temperature, has a shape similar to that of water, and separates asphalt from water under certain conditions, namely demulsification. The emulsified asphalt is decomposed and demulsified, and the asphalt emulsion is gradually contacted with mineral aggregate to demulsifie after construction and construction, the property of the emulsion is gradually changed, water is absorbed and evaporated to be continuously reduced, and asphalt is separated from water phase in the emulsion, so that the asphalt has inherent properties of being repelled with water and solidifying when meeting water, and the time required by the process is the demulsification speed of the asphalt emulsion. The decomposition demulsification mainly comprises the step of generating decomposition demulsification due to adsorption of ionic charges and evaporation of water after the emulsion is contacted with materials of the emulsion. However, the traditional emulsified asphalt has the problems of sedimentation of solid particles, random and disordered sedimentation, difficult accurate control of demulsification speed and the like. Disclosure of Invention In order to solve the problems in the prior art, the invention provides a rare earth tailing modified emulsified asphalt grouting material and application thereof. In a first aspect, the present invention provides a modified emulsified asphalt composition comprising asphalt and a modifying component; the modified emulsified asphalt composition comprises, by weight, 300-1200 parts of asphalt, 75-250 parts of elastomer emulsion and 3-24 parts of rare earth tailings. According to the invention, the rare earth tailings are added into the emulsified asphalt system, so that the colloid structure can be improved, the network structure connected with asphalt can be primarily formed, and the problem of sedimentation of solid particles in the emulsified asphalt finished product can be effectively solved. More importantly, in the demulsification stage, when the asphalt modified by the rare earth tailings contacts the interface, the rare earth active points positioned on the outer side are subjected to coordination complex reaction with the polar groups of the asphalt and the active positions of the interface, so that the asphalt can be adhered to the interface more stably and efficiently. The rare earth tailings, the elastomer polymer and the asphalt which are positioned on the inner side form a more stable reticular structure, so that the influence of external conditions on the demulsification process is reduced, and the controllability of the demulsification process is obviously improved. And the designed demulsification speed can meet various construction requirements. The rare earth tailings are generally added into the modified emulsified asphalt composition in the form of rare earth tailings powder, and can better play a role in an emulsified asphalt system. The bitumen according to the present invention may be any of a number of bitumens which may be used in the preparation of emulsified bitumen, for example 50# bitumen, 70# bitumen, 90# bitumen or 100# bitumen, preferably 70# bitumen. Further, the asphalt is 400-900 parts by weight, the elastomer emulsion is 90-175 parts by weight, and the rare earth tailings are 4-18 parts by weight. In some specific embodiments of the invention, 500-700 parts by weight of asphalt, 110-140 parts by weight of elastomer emulsion and 5-14 parts by weight of rare earth tailings are calculated. Further, the rare earth tailings account for 0.8-2.2% of the asphalt in mass. Further, the rare earth tailings are light rare earth tailings; preferably, the rare earth tailings comprise lanthanum, cerium, neodymium, samarium, yttrium and gadolinium; further preferably, the total mass of the light rar