Self-compacted concrete of resisting erosion of sulfate and its preparing method

A self-compacting concrete and sulfate-resistant technology, which is applied in the field of materials, can solve problems such as insufficient research on anti-corrosion concrete technology, small production areas and output of sulfate-resistant cement, and difficulties in concrete anti-corrosion treatment, so as to reduce harmful defects and increase compactness. permanent, surface intact effect

Inactive Publication Date: 2006-10-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the wide distribution area and complex composition of saline soil in my country, the origin and output of sulfate-resistant cement are very small, which brings difficulties to the anticorrosion treatment of concrete in saline soil areas
Generally speaking, the current research on anti-corrosion concrete technology in saline soil areas is not thorough enough in engineering circles, and no fundamental solution has been found, and a very reasonable method has not been found in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Silica fume single-doped sulfate-resistant self-compacting concrete, the material specifications and manufacturers used are shown in Table 1, the cement composition analysis is shown in Table 2, and the silica fume technical indicators are shown in Table 3.

[0034] Table 1

[0035] Material

[0036] Loss on ignition

[0037]

[0038] The components of the silica fume self-compacting concrete and the components of the comparative example are shown in Table 4. The water-cement ratio in this component is about 0.4, and the sand rate is 0.5. The self-compacting concrete is prepared according to the aforementioned concrete preparation method. The performance comparison between silica fume self-compacting concrete and comparative example is shown in Table 5.

[0039] Material consumption (kg / m 3 )

[0040] performance

[0041] Slump (cm)

Embodiment 2

[0042] Example 2: Fly ash single-mixed sulfate-resistant self-compacting concrete, the material specifications and manufacturers used are shown in Table 6, and the cement composition analysis is shown in Table 2.

[0043] Material

[0044] The components of fly ash single-mixed sulfate-resistant self-compacting concrete are shown in Table 7. The water-cement ratio in this formula is about 0.4, and the sand ratio is 0.5. The self-compacting concrete is prepared according to the aforementioned concrete preparation method. The composition of the fly ash single-mixed sulfate-resistant self-compacting concrete and the composition of the comparative example are shown in Table 8, and the performance comparison of the fly ash single-mixed sulfate-resistant self-compacting concrete and its comparative example is shown in Table 9.

[0045] Material consumption (kg / m 3 )

[0046] pebbles

[0047] performance

Embodiment 3

[0048] Example 3: Self-compacting concrete mixed with fly ash and silica fume. See Table 10 for the specifications and manufacturers of the materials used.

[0049] Material

[0050]The composition of fly ash and silica fume double-doped sulfate-resistant self-compacting concrete and the composition of the comparative example are shown in Table 11. The water-cement ratio in this component is about 0.4, and the sand ratio is 0.5. The self-compacting concrete was prepared according to the aforementioned concrete preparation method. The performance comparison between fly ash and silica fume double-doped sulfate-resistant self-compacting concrete and its comparative example is shown in Table 12.

[0051] Material usage

[0052] performance

[0053] Material

[0054] 15.28％

[0055] The composition of fly ash, silica fume and slag three-mixed sulfate-resistant self-compacting concrete and its comparative example is shown in Tab...

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Abstract

The invention relates to a sulfate corrosion-resistant self-compacted concrete and the preparing method, adopting fly ash, slag and siliceous dust and cement as concrete cementitous material and adding in water reducer and thickening agent to prepare a high-fluidity self-compacted concrete. And the components in the concrete which are corroded by sulfate are remarkably reduced so as to reduce possibility of corrosion to the concrete. And the concrete has high fluidity, slump above 25 cm, extensibility above 60 cm, and blocking ratio above 0.8; and the corrosion test of above 9 months with 10% sodium sulfate solution shows that compressive ratio is above 0.8 and the surface is complete. And the preparing method is simple, and has low cost and wide application.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a sulfate-resistant self-compacting concrete and a preparation method thereof. Background technique [0002] In recent years, the relevant departments of our country have carried out multi-faceted research on the anti-corrosion technology of structures in saline soil areas, put forward some engineering treatment methods, and achieved certain results. The following are several technologies currently used in sulfate-resistant concrete: First, the application of sulfate-resistant cement. Compared with ordinary silicon cement, the composition of sulfate-resistant cement reduces tricalcium aluminate (C 3 A) content, so the possibility of concrete erosion is reduced; the second is the application of mineral admixtures. Application of mineral admixtures to reduce C in cement hydration products in concrete 3 The content of A, at the same time, exerts the pozzolanic effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B14/02C04B14/06C04B18/08C04B24/24C04B24/38
CPCC04B2111/00103Y02W30/91
Inventor 钟世云薛明鲍明轩
Owner TONGJI UNIV
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