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Low-clinker-dosage sulfoaluminate cementing material for sewage pipeline

A technology of sulphoaluminate and sewage pipes, which is applied in the field of sewage pipe materials, can solve the problems of not meeting the basic direction of sustainable development, high cost of sulphoaluminate cement, etc., and achieves easy popularization and use, good crack resistance, and flexibility Sexual Enhancement Effects

Pending Publication Date: 2021-04-16
汪峻峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the greater the amount of sulphoaluminate cement, the higher the cost, and this is not in line with my country's basic direction of energy conservation, emission reduction, and sustainable development.

Method used

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  • Low-clinker-dosage sulfoaluminate cementing material for sewage pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A sulphoaluminate cementitious material with low clinker content for sewage pipelines, comprising the following raw materials in parts by weight: 3 parts of sulphoaluminate cement, 80 parts of mineral powder, 17 parts of calcium sulfate, and high-performance polycarboxylate powder 0.5 parts of water reducing agent, 10 parts of densifying agent, 1 part of shrinkage reducing agent, 1.2 parts of anti-cracking agent, 0.10 part of nanofiber, and 0.5 part of basalt fiber.

[0022] The compacting agent is a mixture of agglomerated silica fume and precipitated nano-silica with a mass ratio of 3:1; the specific surface area of ​​agglomerated silica fume is 19-28m 2 / g; precipitation nano-silica nitrogen adsorption BET specific surface area is 130 ~ 155m 2 / g, cetyltrimethylammonium bromide CTAB adsorption specific surface area is 130~180m 2 / g; The specific surface area of ​​mineral powder is greater than 400-450m 2 / kg, the 28-day activity coefficient of the mineral powder ≥ ...

Embodiment 2

[0027] A sulphoaluminate cementitious material with low clinker content for sewage pipelines, comprising the following raw materials in parts by weight: 10 parts of sulphoaluminate cement, 80 parts of mineral powder, 5 parts of calcium sulfate, and high-performance polycarboxylic acid powder 2 parts of water reducing agent, 3 parts of compacting agent, 3 parts of shrinkage reducing agent, 0.5 part of anti-cracking agent, 0.02 part of nanofiber, and 2 parts of basalt fiber.

[0028] The densifying agent is a mixture of coagulated silica fume and precipitated nano-silica with a mass ratio of 5:2; the specific surface area of ​​coagulated silica fume is 19-28m 2 / g; precipitation nano-silica nitrogen adsorption BET specific surface area is 130 ~ 155m 2 / g, cetyltrimethylammonium bromide CTAB adsorption specific surface area is 130~180m 2 / g; The specific surface area of ​​mineral powder is greater than 400-450m 2 / kg, the 28-day activity coefficient of the mineral powder ≥ 110%...

Embodiment 3

[0033] The difference between this example and embodiment 1 is:

[0034] A sulphoaluminate cementitious material with low clinker content for sewage pipelines, comprising the following raw materials in parts by weight: 3 parts of sulphoaluminate cement, Mineral powder 30 parts , 17 parts of calcium sulfate, 0.5 parts of powder polycarboxylate high-performance water reducer, 10 parts of densifying agent, 1 part of shrinkage reducing agent, 1.2 parts of anti-cracking agent, 0.10 parts of nanofiber, and 0.5 part of basalt fiber.

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Abstract

The invention discloses a low-clinker-dosage sulfoaluminate cementing material for a sewage pipeline. The low-clinker-dosage sulfoaluminate cementing material comprises the following raw materials in parts by weight: 3-10 parts of sulfoaluminate cement, 30-80 parts of mineral powder, 5-17 parts of calcium sulfate, 0.5-2 parts of a water reducing agent, 3-10 parts of a densifying agent, 1-3 parts of a shrinkage reducing agent, 0.5-1.2 parts of an anti-cracking agent, 0.02-0.10 part of nano fibers, and 0.5-2 parts of basalt fibers. When the product is aged for 12 months, the corrosion resistance coefficient is 1.16 or above, the compression-bending ratio is 2.15-3.22, and the corrosion resistance and the crack resistance are good; the cementing material disclosed by the invention has long-term corrosion resistance, the using amount of sulfoaluminate cement clinker and mineral powder are relatively low, the cost is low, and the cementing material is easy to popularize and use.

Description

technical field [0001] The invention relates to the field of sewage pipeline materials, in particular to a sulphoaluminate gelling material with low clinker content used for sewage pipelines. Background technique [0002] In recent years, with the rapid development of the economy, our living environment has suffered varying degrees of damage, among which water pollution is quite serious. Ordinary urban sewage pipelines suffer from the alternating action of dryness and wetness for a long time due to the fluctuation of sewage. At the same time, the concentration of corrosive ions in sewage is high and the corrosion is extremely serious. This poses a severe challenge to the performance of concrete materials for sewage pipelines. Sulphoaluminate cement is a product developed in my country in the 1970s and 1980s. It has the characteristics of high early strength, low alkali, frost resistance, and corrosion resistance. It is widely used in concrete engineering. In order to improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B111/20
Inventor 汪峻峰
Owner 汪峻峰