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Low-temperature spraying cement-based mortar material for trenchless pipeline repair and preparation method thereof

A pipeline repair and mortar material technology, applied in the field of building materials, can solve problems such as the aging of underground pipelines

Inactive Publication Date: 2021-05-18
武汉中地大非开挖研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a low-temperature type non-excavation pipeline repair spraying cement-based mortar material to solve the problems existing in inspection wells and underground pipeline aging repair construction in winter low temperature environment; the present invention also provides A preparation method of the mortar material is provided

Method used

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  • Low-temperature spraying cement-based mortar material for trenchless pipeline repair and preparation method thereof
  • Low-temperature spraying cement-based mortar material for trenchless pipeline repair and preparation method thereof

Examples

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Embodiment 1

[0033] refer to figure 1 , Embodiment 1 of the present invention provides a kind of preparation method of spraying cement-based mortar material for low-temperature trenchless pipeline repair, comprising the following steps:

[0034] Step S1, in parts by weight, weigh 0.3 parts of polyether polycarboxylate superplasticizer, 6 parts of early strength components, 0.5 parts of tartaric acid, 1.5 parts of calcium bentonite, 0.1 parts of powdered silicone and 1.5 parts of redispersible latex powder Parts were added to a small material mixer for premixing to obtain the first mixture; wherein, by weight, each part of the early strength component was composed of 10 parts of modified nano-silica, 70 parts of dodecacalcium heptaaluminate, calcium formate 10 parts and 5 parts of triethanolamine; modified nano-silica is prepared by the following process: by weight, 100 parts of nano-silica is added to a mixed solution of absolute ethanol and ultrapure water with a volume ratio of 1:1 , ul...

Embodiment 2

[0040] Embodiment 2 provides a method for preparing a sprayed cement-based mortar material for low-temperature trenchless pipeline repair, comprising the following steps:

[0041] Step S1, in parts by weight, weigh 0.25 parts of polyester polycarboxylate water reducer, 5 parts of early strength components, 0.4 parts of boric acid, 1 part of metakaolin, 0.1 part of polyether defoamer, redispersible Add 2 parts of latex powder into a small material mixer for premixing to obtain the first mixture; wherein, in parts by weight, each part of early strength component consists of 10 parts of modified nano-silica, 65 parts of dodecacalcium heptaaluminate , 2.5 parts of calcium formate, and 6.5 parts of triisopropanolamine; modified nano-silica is prepared by the following process: by weight, adding 100 parts of nano-silica to absolute ethanol and In the mixed solution of ultrapure water, ultrasonically disperse for 30 minutes, adjust the pH to 3~4, then add 100 parts of γ-aminopropyltrie...

Embodiment 3

[0047] Embodiment 3 provides a method for preparing a low-temperature trenchless pipeline repair sprayed cement-based mortar material, comprising the following steps:

[0048] Step S1, in parts by weight, weigh 0.2 parts of polyamide-polyethylene glycol branched water reducer, 4.5 parts of early strength components, 0.15 parts of sodium gluconate, 1.5 parts of sepiolite, and 0.15 parts of powdered silicone 1.8 parts, 1.8 parts of redispersible latex powder are added in the small material mixer and carry out premixing, obtain the first mixture; Wherein, by weight, every part of early strength component is made of 25 parts of modified nano silicon dioxide, heptaaluminate Composed of 70 parts of dodecacalcium, 12 parts of calcium formate, and 8 parts of ethylene glycol; modified nano-silica is prepared by the following process: by weight, 100 parts of nano-silica is added to the inorganic compound with a volume ratio of 1:1. In the mixed solution of water ethanol and ultrapure wa...

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Abstract

The invention relates to the technical field of building materials, in particular to a low-temperature spraying cement-based mortar material for trenchless pipeline repair and a preparation method thereof. The mortar material comprises the following raw materials in parts by weight: 30-75 parts of cement, 20-70 parts of a quartz sand mixture, 1-15 parts of mineral powder, 0-1 part of a polycarboxylate superplasticizer, 0-2 parts of fibers, 0-15 parts of an early strength component, 0-5 parts of a retarder, 0-6 parts of a thixotropic agent, 0-0.5 part of a defoaming agent and 0-5 parts of redispersible latex powder, wherein each part of the early strength component is formed by compounding the following components in parts by weight: 1-30 parts of modified nano silicon dioxide, 50-90 parts of dodecacalcium heptaaluminate, 1-15 parts of calcium formate and 1-5 parts of an anti-freezing agent. The mortar material has the characteristics of normal coagulation at a low temperature (-10 DEG C to 5 DEG C), high early, middle and later strength, good adhesive property, good durability, good pumpability and the like, and can be used for effectively repairing a pipeline.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a sprayed cement-based mortar material for low-temperature trenchless pipeline repair and a preparation method thereof. Background technique [0002] At present, the design of urban underground foundations is intricate, the urban traffic is very busy, and the development of underground space is developing in depth. Under the condition of increasing emphasis on urban environment and sustainable development, traditional excavation methods are used to build, repair and update underground pipelines, resulting in frequent disembowelling of urban roads, seriously affecting urban traffic and the lives of surrounding residents. Trenchless pipeline repair technology can well solve the problems of aging, corrosion, leakage, interface disconnection, deformation and other problems in urban pipelines, prolong the service life of pipelines and reduce the occurrence of secondary disa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/06C04B111/72
CPCC04B28/04C04B28/06C04B2201/50C04B2111/72C04B2111/00155C04B2103/302C04B2103/14C04B24/06C04B14/104C04B24/42C04B2103/0057C04B7/02C04B16/0625C04B14/06C04B20/0016C04B22/0013C04B14/106C04B2103/50C04B18/146C04B14/4643C04B14/042C04B18/08C04B16/0633
Inventor 黄玉娟孔耀祖陈俊陈雄
Owner 武汉中地大非开挖研究院有限公司
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