UHPC suitable for long-term sewage environment and preparation process thereof

An environmental and sewage technology, applied in the field of anti-corrosion of building materials, can solve the problems of insufficient protection of steel bars, UHPC erosion, structural damage, etc., and achieve long-term resistance to microbial corrosion, good biological corrosion, and increased fluidity.

Pending Publication Date: 2022-01-07
CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain defects in the concrete in the prior art: because the concrete has a certain water permeability, it cannot protect the steel bars well in the environment where salts exist, and the chloride salts will cause the steel bars to corrode, and then cause structural damage; and Sulfate enters the interior of the concrete, often causing salt swelling damage
However, stro

Method used

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  • UHPC suitable for long-term sewage environment and preparation process thereof
  • UHPC suitable for long-term sewage environment and preparation process thereof
  • UHPC suitable for long-term sewage environment and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] This embodiment provides an UHPC for long-term sewage and its preparation processes. The components of UHPC are as follows: water, cement, quartz sand, high-active mineral blend, low-active filling materials, steel Fiber, high-performance polycarboxylic acid water reduction, ether emulsion defoamer and antibacterial phthalocyanine blue mass ratio is 0.250: 1: 1.55: 0.30: 0.10: 0.235: 0.0133: 0.00224: 0.005; where cement includes quality P · O52.5 Ordinary silicate cement and P · O52.5 aluminate cement of 1: 0.06.

[0037] Its preparation process includes the following steps:

[0038] S1, the cement, fine aggregate, highly active mineral blend and the low-active filling material were added to the mixer according to the above mass ratio, and the pre-agrosis was performed for 2 min;

[0039] S2, the water reduction agent, the defoaming agent, and the antibacterial agent are added to the mixture of step S1 in the mixture of step S1, and the mixture is stirred...

Example Embodiment

[0052] Example 2-5

[0053] Example 2-5 provides a UHPC and its preparation process suitable for use in long-term sewage environments, and is different from that of Example 1, and the use of orthogonal experimental design methods, the components of UHPC are measured as follows. The rest is substantially the same as in Example 1, and details are not described herein again.

[0054] Table 2 Example 2-5 Preparation of UHPC ingredient table

[0055]

[0056] Example 2-5 UHPc obtained by performing performance detection was obtained by the same method as described above.

[0057] Table 3 Example 1-5 and Comparative Example 1 Test Result of UHPC

[0058]

[0059]

[0060] It can be seen from Table 3 that the raw material components are inconsistent, the fluidity and strength of the obtained UHPC are inconsistent, but the UHPC of all embodiments has a higher strength than the contrast of the contrast, and the strain density is lower than the ratio 1, Further indication of the antib...

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Abstract

The invention provides UHPC suitable for a long-term sewage environment and a preparation process thereof. The UHPC comprises the following components: water, cement, fine aggregate, a mineral admixture, metal fibers, an additive and an antibacterial agent, wherein the antibacterial agent is beta-type phthalocyanine blue with a particle size of 0.005-0.015 [mu]m, and the cement is a mixture of ordinary Portland cement and calcium aluminate cement. According to the invention, the antibacterial agent phthalocyanine blue matched with UHPC is creatively introduced, and the high performance of the UHPC is combined, so that the material has good biological corrosion resistance, and the flowability and the strength of the material are improved; part of calcium aluminate cement is used for replacing ordinary Portland cement, so that the UHPC has a relatively low biological erosion rate, and the erosion-resistant period of the UHPC is further prolonged; and the UHPC is more suitable for serving under the working condition of sewage and waste treatment, the corrosion resistance of components can be greatly improved, the service life of the structure is prolonged, the later maintenance cost is reduced, and the UHPC has wide market prospects.

Description

technical field [0001] The invention relates to the field of building material anticorrosion technology, in particular to a UHPC suitable for long-term sewage environments and a preparation process thereof. Background technique [0002] As the most widely used building material at present, concrete plays an important role in urban construction, production development and the improvement of human living standards. However, there are certain defects in the concrete in the prior art: because the concrete has a certain water permeability, it cannot protect the steel bars well in the environment where salts exist, and the chloride salts will cause the steel bars to corrode, and then cause structural damage; and When sulfate enters the interior of the concrete, salt expansion damage often occurs. At the same time, although concrete is composed of inorganic materials, bacteria such as sulfur oxidizing bacteria (SOB) and sulfate reducing bacteria (SRB) can still corrode concrete. T...

Claims

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Application Information

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IPC IPC(8): C04B28/06C04B24/12C04B111/74C04B103/69
CPCC04B28/06C04B24/405C04B2111/74C04B2103/69C04B2201/50C04B7/02C04B14/06C04B18/12C04B18/08C04B14/48C04B2103/302C04B2103/50
Inventor 叶华亮卢仲兴闵传杰赵皇焦鹤秦雄
Owner CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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