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

A self-compacting concrete and sulfate-resistant technology, applied in the field of materials, can solve the problems of insufficient research on anti-corrosion concrete technology, low production area and output of sulfate-resistant cement, and difficulty in concrete anti-corrosion treatment, so as to reduce harmful defects and increase compaction. Sexual, surface intact effect

Inactive Publication Date: 2007-09-12
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-mixed sulfate-resistant self-compacting concrete, see Table 1 for material specifications and manufacturers, see Table 2 for cement composition analysis, and Table 3 for silica fume technical indicators.

[0034] Table 1

[0035] Material

[0036] Ignition loss

[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 ratio 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 the 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 specifications of materials used and manufacturers are shown in Table 6, and the analysis of cement components is shown in Table 2.

[0043] Material

[0044] The components of fly ash single-mixed anti-sulfate 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. Self-compacting concrete is prepared according to the aforementioned concrete preparation method. The composition of 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 fly ash single-mixed sulfate-resistant self-compacting concrete and the comparison example is shown in Table 9.

[0045] Material consumption (kg / m 3 )

[0046] Stone

[0047] Performance

Embodiment 3

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

[0049] Material

[0050]The composition of fly ash and silica fume double-mixed sulfate-resistant self-compacting concrete and the composition of the comparative example are shown in Table 11. The water-cement ratio of this component 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 performance comparison between fly ash and silica fume double-mixed sulfate-resistant self-compacting concrete and its comparative example is shown in Table 12.

[0051] Material consumption

[0052] Performance

[0053] Material

[0054] 15.28％

[0055] The composition of fly ash, silica fume and slag resistant sulfate-resistant self-compacting concrete and its comparative examples are shown in Table 14. The water-c...

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PUM

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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 specifically relates to a self-compacting concrete resistant to sulfate corrosion and a preparation method thereof. Background technique [0002] In recent years, the relevant departments of our country have conducted multi-directional 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: One is the use of sulfate-resistant cement. Compared with ordinary silica cement, sulfate-resistant cement reduces tricalcium aluminate (C 3 A) content, so it reduces the possibility of concrete erosion; the second is the application of mineral admixtures. Use mineral admixtures to reduce C in cement hydration products in concrete 3 The content of A, at the same time exerts the pozzolanic effect and filling effect of mineral ad...

Claims

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Application Information

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