A kind of corrosion-resistant aluminate cement pipe and its preparation method

A kind of aluminate cement and anti-corrosion technology, which is applied in the field of building materials, can solve the problems of microbial corrosion damage, durability reduction of concrete pipeline structure, and reduce the cost of replacement and maintenance of sewage pipeline infrastructure, so as to reduce corrosion damage and ensure antibacterial corrosion Performance and reduction of replacement and maintenance costs

Active Publication Date: 2021-09-03
TONGJI UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a corrosion-resistant aluminate cement pipe and its preparation method in order to solve the above problems, so as to solve the problem that the conventional sewage concrete pipe is easily damaged by microbial corrosion in the prior art, resulting in a decrease in the durability of the concrete pipe structure , to reduce the cost of replacement and maintenance of sewer infrastructure

Method used

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  • A kind of corrosion-resistant aluminate cement pipe and its preparation method

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Effect test

Embodiment 1

[0026] Two kinds of antibacterial corrosion mortars for the inner lining of sewage concrete pipelines were prepared respectively from ordinary Portland cement (OPC) and aluminate cement (CAC) and siliceous medium sand.

[0027] At 20°C, the uniformly stirred mortar was made into a cylindrical sample with a diameter of 60 mm and a height of 120 mm. The prepared cylindrical mortar samples were hung in the exposure box, and then placed on top of a sewage pipe with a large flow of domestic wastewater. The pH of the waste water from the sewer pipeline has been maintained at around 4 for a long time, and the surrounding concrete walls have shown obvious corrosion and deterioration. The cylindrical mortar samples were exposed on site for 12 months, and their appearance and mass loss were regularly detected during the exposure period.

[0028] After 12 months of exposure, the samples made of OPC deteriorated severely, showing obvious peeling of the surface layer; in contrast, the sam...

Embodiment 2

[0031] Table 1 shows the composition of cementitious materials and aggregate types used in five kinds of concrete for pouring sewage pipelines.

[0032] Under 20 DEG C, the concrete that has been stirred is poured the sample that grows 200mm * width 150mm * thickness 80mm, and every kind of sample is divided into 3 groups, is placed in 3 sewage pipe network manhole places respectively (this sewage pipe network is the same as embodiment 1) sewer network). After 12 months of on-site exposure, it was taken out, and its mass loss was measured with an electronic balance with an accuracy of 0.001g. The recorded results are shown in Table 2.

[0033] Table 1 Concrete formulations for sewer pipes with different cementitious materials / aggregate types

[0034] Sample serial number Composition of cementitious material aggregate type PC1 OPC100% Silica PC2 OPC100% dolomite CA1 CAC100% Silica CA2 CAC100% dolomite CA / SL1 CAC85%+15% s...

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Abstract

The invention belongs to the technical field of building materials, and specifically relates to a corrosion-resistant aluminate cement pipeline and a preparation method thereof. Aluminate cement and slag are used as cementitious materials. The quality of the aluminate cement: the quality of the slag=80-90 : 10-20, made by using active and reactive dolomite as aggregate. The anti-corrosion aluminate cement pipeline provided by the present invention has significantly better corrosion resistance in the sewage environment than the sewage concrete made of ordinary Portland cement as the main cementitious material and conventional siliceous sand as the aggregate Pipes can achieve the purpose of reducing the cost of replacing and maintaining sewage concrete pipes.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a corrosion-resistant aluminate cement pipeline and a preparation method thereof. Background technique [0002] At present, the concrete pipes used for sewage discharge are mainly made of ordinary Portland cement as the main cementitious material and conventional siliceous sand as the aggregate. Simple and cheap, but H in the sewage environment 2 The high concentration of S is converted into sulfuric acid under the action of microorganisms such as sulfur oxidizing bacteria, causing corrosion damage to concrete pipes, thereby reducing the structural strength of concrete pipes, shortening service life, and greatly increasing the replacement and maintenance costs of sewage pipe infrastructure. [0003] Therefore, how to enhance the antibacterial corrosion of sewage concrete pipelines, improve the durability of concrete pipeline structures, and reduce replacem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06C04B111/20C04B111/23C04B111/56
CPCC04B28/06C04B2111/2092C04B2111/23C04B2111/56C04B18/14C04B14/26
Inventor 徐玲琳彭相王中平吴凯
Owner TONGJI UNIV
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