Polymer mortar and preparation method thereof

A polymer and polymer emulsion technology, applied in the field of concrete materials, can solve the problem that the performance of polymer mortar cannot meet the construction requirements of CRTSII slab ballastless track filling layer construction requirements, and the polymer mortar does not meet the construction requirements and is far from meeting the requirements of the mortar performance standard. Mortar performance standards and other issues, to eliminate adverse environmental impacts, ensure construction efficiency and project quality, and meet the effects of early age strength and elastic modulus

Active Publication Date: 2020-09-04
NAT ENG LAB FOR HIGH SPEED RAILWAY CONSTR +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the polymer mortar involved in the above two patents does not meet the construction requirements of the CRTS II slab ballastless track filling layer, is not suitable for pouring construction, and is far from meeting the mortar performance standards in the current ballastless track maintenance regulations
[0005] In summary, there is an urgent need for a polymer mortar and its preparation method to solve the problem that the performance of the polymer mortar in the prior art cannot meet the construction requirements of the CRTS II slab ballastless track filling layer and the current ballastless track maintenance regulations. The question of mortar performance standards

Method used

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  • Polymer mortar and preparation method thereof
  • Polymer mortar and preparation method thereof
  • Polymer mortar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 (simulation ambient temperature 35 ℃):

[0032] A kind of polymer mortar, according to one cubic meter of concrete, comprises the following raw material components in parts by weight: 90 parts of rapid hardening sulfoaluminate cement, 45 parts of polymer emulsion, 2 parts of superfine powder, 5 parts of gypsum powder, 10 parts of expansion agent, 190 parts of sand, 30 parts of water, 1.0 part of powder water reducer, 0.5 part of polymer fiber, 0 part of hardening accelerator, 0.04 part of retarder and 0.3 part of defoamer.

[0033] The polymer emulsion is a styrene-butadiene emulsion with a viscosity of 80 mPa.s, a solid content of 50%, and a minimum film-forming temperature of 0°C.

[0034] The ultrafine powder is a mixture of ultrafine muscovite powder and calcium carbonate whiskers, wherein the fineness of the ultrafine muscovite powder is 1200 mesh, the aspect ratio of the calcium carbonate whiskers is 20:1, and the ultrafine muscovite whiskers The mas...

Embodiment 2

[0043] Embodiment 2 (simulation ambient temperature 20 ℃):

[0044] Different from Example 1, 95 parts of rapid hardening sulfoaluminate cement, 40 parts of polymer emulsion, 2.5 parts of superfine powder, 10 parts of gypsum powder, 8 parts of expansion agent, 200 parts of sand, 35 parts of water, powder 0.8 part of body water reducer, 0.8 part of polymer fiber, 0.02 part of hardening accelerator, 0.01 part of setting retarder and 0.5 part of defoamer, and other conditions remain unchanged.

Embodiment 3

[0045] Embodiment 3 (simulation ambient temperature 5 ℃):

[0046] Different from Example 1, 100 parts of rapid hardening sulfoaluminate cement, 35 parts of polymer emulsion, 3 parts of superfine powder, 10 parts of gypsum powder, 5 parts of expansion agent, 210 parts of sand, 40 parts of water, powder 0.5 part of body water reducing agent, 1.0 part of polymer fiber, 0.05 part of hardening accelerator, 0 part of setting retarder and 0.8 part of defoamer, and other conditions remain unchanged.

[0047] The performance test of the polymer mortar prepared by embodiment 1-3 all comprises two test phases, the first stage: the newly prepared polymer mortar (i.e. the polymer mortar before hardening), see Table 1, 3 and 5 (need Note that in Tables 1, 3 and 5 t 280 Refers to the time required for the expansion of the polymer mortar to reach 280mm); the second stage, the polymer mortar after hardening, see Tables 2, 4 and 6.

[0048] The performance result of the newly prepared polyme...

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Abstract

The invention provides polymer mortar and a preparation method thereof. The polymer mortar comprises the following raw material components in parts by weight: 90-100 parts of rapid hardening sulphoaluminate cement, 35-45 parts of a polymer emulsion, 2-3 parts of superfine powder, 5-10 parts of gypsum powder, 5-10 parts of an expanding agent, 190-210 parts of sand, 30-40 parts of water, 0.5-1.0 part of a powder water reducing agent, 0.5-1.0 part of polymer fiber, 0-0.05 part of a hardening accelerator, 0-0.05 part of a retarder and 0.3-0.8 part of a defoaming agent. The method comprises the following steps: preparing a dry powder material, preparing a pre-dispersed emulsion, adding the dry powder material, the pre-dispersed emulsion, the water and the defoaming agent into a stirrer, and mixing and stirring for 1-3 minutes to a uniform state, thereby obtaining the polymer mortar. The polymer mortar can meet the construction requirements of the filling layer of a CRTS II type slab ballastless track.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a polymer mortar and a preparation method thereof. Background technique [0002] The technical prototype of CRTS II slab ballastless track comes from Germany. Since 1977, Germany has started research on longitudinally connected slab ballastless track, and built CRTS II slab ballastless track straight and curved test sections in 1999. In 2006, the Nuremberg-Ingolstadt high-speed railway in Germany was officially put into operation. About 70km long CRTSII slab ballastless track was laid on this line. Compared with the CRTS I slab ballastless track technology from Japan, the CRTS II slab ballastless track was applied relatively late, and mature maintenance and repair technology has not yet been formed. Since my country introduced German related technologies, my country has formed its own technical characteristics on the basis of absorbing advanced foreign experience, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B24/26C04B14/38C04B14/20C04B40/00C04B111/76
CPCC04B28/14C04B24/2676C04B24/2641C04B24/2682C04B14/20C04B14/383C04B40/0039C04B2201/50C04B2201/10C04B2111/76C04B7/32C04B14/06C04B2103/302C04B2103/22C04B2103/50C04B2103/14C04B22/066C04B16/0633C04B16/0641
Inventor 元强左胜浩余志武黄庭杰
Owner NAT ENG LAB FOR HIGH SPEED RAILWAY CONSTR
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