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Cement clinker and hydraulic engineering cement for impervious wall of dam and application thereof

A technology of cement clinker and anti-seepage wall, applied in the field of hydraulic cement and cement clinker, can solve problems such as being unfavorable for the secondary construction of dam anti-seepage wall and the like

Active Publication Date: 2010-06-09
JIAHUA SPECIAL CEMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The 28d strength of 42.5-grade low-heat cement is greater than 42.5Mpa, which is not conducive to the secondary construction of the dam cut-off wall

Method used

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  • Cement clinker and hydraulic engineering cement for impervious wall of dam and application thereof

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Embodiment

[0046] The cement of the present invention is used as the hydraulic cement of the dam cutoff wall, and the chemical composition of the cement clinker used is 24% of silicon dioxide, 4.4% of aluminum oxide, 5.1% of ferric oxide, 61% of calcium oxide, and magnesia 3.4%; sulfur trioxide 1.3%, other unavoidable impurities 0.8%. The mineral composition is: C 3 S 29%, C 2 S 51%, C 3 A 2.0%, C 4 AF 15%, unavoidable impurities 1%. Mix 95% of cement clinker and 5.0% of dihydrate gypsum with the above components, and grind to make cement with required specific surface area for testing.

[0047] Table 2 shows the recommended mix ratio of concrete for the cut-off wall of the dam, in which the specific surface area of ​​1# cement used is 220m 2 / kg, the specific surface area of ​​2# cement is 205m 2 / kg. The water reducer is a polycarboxylate or naphthalene water reducer commonly used in the hydraulic concrete market, and the air-entraining agent is a commonly used air-entraining ag...

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Abstract

The invention belongs to the field of buildings, in particular to a cement clinker, hydraulic engineering cement for an impervious wall of a dam and application thereof. The invention provides a cement clinker with optimized mixture ratio, wherein the cement clinker is prepared into cement which is applied to the hydraulic engineering cement for the impervious wall of the dam and has the characteristics of low strength at early stage and high strength at late stage. The cement clink comprises the following minerals in percentage by weight: 25-40 percent of C3S, 42-63 percent of C2S, 1-3.5 percent of C3A, 11-16 percent of C4AF and 0-2 percent of inevitable impurities. The concrete prepared from the cement clinker and the cement as raw materials has the characteristics of low hydration heat, low strength at early stage, high strength at late stage, non-hanging strength and the like, is suitable for hydraulic engineering of the impervious wall of the dam and can replace special hydraulic engineering cement for the concrete prepared from the traditional moderate-heat cement, low-heat cement or general purpose portland cement.

Description

technical field [0001] The invention belongs to the field of construction, and in particular relates to cement clinker, hydraulic cement for dam cut-off walls and applications thereof. Background technique [0002] Dam anti-seepage wall is a concrete anti-seepage wall built in the permeable stratum under the dam body or barrage. The upper part of the wall is connected with the anti-seepage body of the dam body or barrage, and the lower part of the wall is embedded in the bedrock to a certain depth. . The concrete cut-off wall can effectively cut off the groundwater flow, thereby ensuring the seepage stability of the permeable strata of the dam foundation. The dam anti-seepage wall and the anti-seepage body in the dam body play an important role in ensuring the safety of the reservoir and giving full play to the benefits of the reservoir. [0003] The hydraulic cement used for the cut-off wall of the dam is used in the construction of the cut-off wall on the large-volume co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/02C04B7/04E02B7/02
Inventor 阳运霞吴勇范有银何正雄黄良锐
Owner JIAHUA SPECIAL CEMENT
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