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A kind of sealing slurry for assembly type construction in winter and preparation method thereof

A prefabricated and slurry technology, which is applied in the field of prefabricated buildings, can solve problems such as high maintenance costs, threats to project quality and safety, and influence on the strength of sealing grout, and achieve good bonding performance, good crack resistance, plasticity and Good effect of thixotropy

Active Publication Date: 2022-06-24
BEIJING ACAD OF BUILDING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the sealing grout, on the one hand, it is difficult to keep the bottom of the component warm and the maintenance cost in winter is too high. On the other hand, the strength of the sealing grout is directly affected after being frozen. The early strength is insufficient, and it is easy to cause grout leakage during the sleeve grouting construction. And the phenomenon of warehouse explosion, the lack of strength in the later stage makes it difficult to supply force to the components, which will affect the construction progress and even threaten the quality and safety of the project
[0006] With the increasing demand for prefabricated construction in winter, JG / T 408-2019 "Sleeve Grouting Materials for Reinforced Connections" has added relevant descriptions and technical indicators about low-temperature sleeve grouting materials, but the sealing grout In particular, there is no relevant standard for low-temperature sealing paste

Method used

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  • A kind of sealing slurry for assembly type construction in winter and preparation method thereof
  • A kind of sealing slurry for assembly type construction in winter and preparation method thereof
  • A kind of sealing slurry for assembly type construction in winter and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The sealing slurry for prefabricated construction in winter in this embodiment is composed of the following components in parts by weight:

[0027] 35 parts of P·O52.5R ordinary Portland cement, 5 parts of fast-hardening sulfoaluminate cement, 15 parts of heavy calcium ultrafine powder, 30 parts of 40-70 mesh river sand, 15 parts of 70-140 mesh river sand , 0.02 part of azodicarbonamide, 0.08 part of sodium lignosulfonate, 0.08 part of tartaric acid, 0.08 part of sodium gluconate, 0.05 part of lithium carbonate, 0.045 part of hydroxypropyl methyl cellulose ether, anti-saponification redispersible vinyl acetate / 0.2 part of ethylene copolymer rubber powder, 0.1 part of calcium stearate, 0.1 part of German Mingling Chemical P803 silicone defoamer, and 0.15 part of sodium nitrate.

[0028] After mixing the above materials evenly, put them in a -5℃ environment for 24 hours, and at -5℃ extreme environment, according to a water-material ratio of 0.14, use a 0℃ ice-water mixt...

Embodiment 2

[0034] The sealing slurry for prefabricated construction in winter in this embodiment is composed of the following components in parts by weight:

[0035] 35 parts of 52.5 magnesium phosphate cement, 8 parts of fast-hardening sulfoaluminate cement, 12 parts of microbead fly ash, 30 parts of 40-70 mesh river sand, 15 parts of 70-140 mesh river sand, 0.02 part of azodicarbonamide 0.08 part of sodium lignosulfonate, 0.1 part of boric acid, 0.1 part of sodium gluconate, 0.08 part of lithium carbonate, 0.05 part of hydroxypropyl methyl cellulose ether, 0.2 part of anti-saponification redispersible vinyl acetate / ethylene copolymer powder , 0.1 part of calcium stearate, 0.1 part of German Mingling Chemical P803 silicone defoamer, 0.2 part of sodium nitrate.

[0036] After mixing the above materials evenly, put them in a -5℃ environment for 24 hours, and at -5℃ extreme environment, according to a water-material ratio of 0.14, use a 0℃ ice-water mixture to stir, and the measured indica...

Embodiment 3

[0042] The sealing slurry for prefabricated construction in winter in this embodiment is composed of the following components in parts by weight:

[0043] 35 parts of P·O52.5R ordinary Portland cement, 15 parts of fast-hardening sulfoaluminate cement, 5 parts of S95 superfine slag powder, 35 parts of 40-70 mesh river sand, 10 parts of 70-140 mesh river sand part, 0.015 part of azodicarbonamide, 0.08 part of sodium lignosulfonate, 0.15 part of tartaric acid, 0.05 part of sodium gluconate, 0.15 part of lithium carbonate, 0.035 part of hydroxypropyl methylcellulose ether, anti-saponification redispersible acetic acid 0.25 part of ethylene / ethylene copolymer rubber powder, 0.1 part of zinc stearate, 0.2 part of German Mingling Chemical P803 silicone defoamer, and 0.3 part of sodium nitrite.

[0044] After mixing the above materials evenly, put them in a -10℃ environment for 24 hours. Under the extreme environment of -10℃, according to a water-material ratio of 0.14, use a 0℃ ice-w...

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Abstract

The invention discloses a sealing paste for assembly type construction in winter and a preparation method thereof. The sealing slurry is mainly composed of cement, mineral admixture, aggregate, expansion agent, water reducer, coagulation regulator, water retention agent, redispersible latex powder, stearate, antifreeze and other raw materials. It is used to seal the joints of vertical members during the grouting construction of the connected cavity during the construction in the low temperature environment of -10-10 °C in winter, and is mainly used for the sealing of the intrusion into the joints. It still has good hydration characteristics under low temperature conditions. It only needs conventional maintenance and no auxiliary heat to meet the design requirements. It also has micro-expansion, good bonding performance, good plasticity and thixotropy, and good crack resistance. And other advantages, its early strength is high, and it can reach 10MPa in 4 hours. The production method is simple, the operation is easy, and the construction requirements are met.

Description

technical field [0001] The invention belongs to the technical field of prefabricated buildings, and in particular relates to a sealing slurry for prefabricated construction in winter and a preparation method thereof. Background technique [0002] my country is now in the stage of modern industrialization development, the rapid economic development, the optimization and transformation of the industrial structure, the urgency of environmental protection tasks and the disappearance of demographic dividends have brought good development opportunities to the new structural system of green environmental protection - prefabricated buildings. It is one of the key directions of the development of building structures in my country. According to the national development goal, by 2025, my country's prefabricated buildings will account for 30% of the new construction area. [0003] Sealing slurry is a kind of dry mixture used to seal the joints of connecting cavity grouting construction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2201/50C04B22/00C04B14/28C04B14/06C04B24/124C04B24/18C04B24/06C04B24/10C04B24/26C04B24/42C04B24/04C04B24/383C04B22/085C04B22/10
Inventor 韩梦迪孙岩波阎明伟李大宁刘晨光李冲李云舟
Owner BEIJING ACAD OF BUILDING ENG
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