High-performance concrete gel material for tunnel and application thereof

A cementitious material and concrete technology, which is applied in the field of concrete cementitious materials, can solve the problems of large amount of cement, insufficient durability of concrete, and high injection rebound rate, and achieves reduction of hydration heat, improvement of narrow-mouth passing ability, and comprehensive performance. improved effect

Active Publication Date: 2012-12-26
中铁西南科学研究院有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-performance concrete cementitious material for tunnels in order to overcome the shortcomings of insufficient durability of existing concrete, excessive cement consumption, and high spray rebound rate.

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  • High-performance concrete gel material for tunnel and application thereof
  • High-performance concrete gel material for tunnel and application thereof

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following experimental examples, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0028] Add silica sol (or silica sol and nano-calcium carbonate) to concrete mixing water, stir evenly, mix it with cement and aggregate (or microbeads, fly ash, cement, aggregate), and mix it into For other admixtures, a reasonable mixing procedure should be formulated according to the state of the admixture and technical requirements, and the mixing time should be determined at the same time to obtain high-performance concrete for tunnels. Stirring time, aggregate, and water-cement ratio (water-binder ratio) do not belong to the content of the technical solution of the pr...

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Abstract

The invention discloses a concrete gel material which comprises cement and silica solution. The invention further discloses a high-performance concrete for tunnel prepared through the concrete gel material provided by the invention. The high-performance concrete is suitable to be applied to injecting concrete, moulding concrete and others. Through the adoption of the concrete gel material or the high-performance concrete for the tunnel provided by the invention for injecting the concrete, the rebound ratio can be effectively reduced and even reduced to 4.1% to the minimum; and the concrete gel material or the high-performance concrete is good in working performance; the obtained concrete finished product is high in early strength, and good in freezing resistance; the waterproof performance and the wearable performance are improved; the quantity of used cement can be reduced; the carbon emission can be reduced; and good economic benefit and environment-friendly benefit are brought.

Description

technical field [0001] The invention relates to a concrete cementitious material, in particular to a concrete cementitious material for high-performance concrete used in tunnels. Background technique [0002] After the 1990s, due to the construction of many large structures, especially high-rise buildings and long-span bridges, the design level of concrete was improved, and the composite application of large doses of high-efficiency water reducers and mineral admixtures made the water-cement ratio (water-cement ratio (water-cement ratio) ratio) can be greatly reduced, and the strength of the mixture produced by the preparation develops rapidly, which meets the demand for concrete in engineering construction. During this period, a series of major changes took place in cement concrete technology, including the increase of tricalcium silicate (early strength mineral) in cement and the increase of grinding fineness, which greatly improved the activity; The development of ways t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B22/06C04B22/10
Inventor 孙亚婷梅志荣马士伟李蓉杜俊李传富
Owner 中铁西南科学研究院有限公司
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