Low-carbon and carbon-absorbing concrete and preparation method thereof

A technology for concrete and mixture, applied in the field of low-carbon and carbon-absorbing concrete and its preparation, can solve the problem of limited use of high-calcium fly ash, and achieve the effects of high strength and good stability

Active Publication Date: 2013-07-10
北京东方建宇混凝土科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, temporary hard water is greatly affected by geographical distribution. For northern regions where temporary hard water is less distributed, the above-mentioned technology cannot be used to apply high-calcium fly ash to the concrete field, which in turn leads to restrictions on the use of high-calcium fly ash

Method used

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  • Low-carbon and carbon-absorbing concrete and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Mix 29kg of Portland cement, 174kg of slag powder, 87kg of high-calcium fly ash with a calcium oxide content of 8wt%, and 6kg of industrial gypsum to obtain a mixed material;

[0030] (2) Mix the mixed material in the above step (1) with the aggregate of 1860kg to obtain the mixture, wherein the aggregate is stone and sand, and the sand ratio of the aggregate is 55%;

[0031] (3) Dissolve 1.5kg of naphthalene-based water reducer in 188.5kg of water to obtain an aqueous solution of water reducer;

[0032] (4) Add the water reducer aqueous solution in the step (3) to the mixture in the step (2), and stir evenly to obtain the low-carbon and carbon-absorbing concrete A.

Embodiment 2

[0034] (1) Mix 80kg of fly ash Portland cement, 160kg of slag powder with a vitreous content of 90.7wt%, 100kg of high-calcium fly ash with a calcium oxide content of 10.2wt%, and 8kg of natural gypsum to obtain Mixed material;

[0035] (2) Mix the mixed material in the above step (1) with the aggregate of 1824kg to obtain the mixture, wherein the aggregate is stone and sand, and the sand rate of the aggregate is 48%;

[0036] (3) Dissolve 2.7kg of aliphatic water reducer in 170kg of water to obtain an aqueous solution of water reducer;

[0037] (4) Add the water reducer aqueous solution in the step (3) to the mixture in the step (2), and stir evenly to obtain the low-carbon and carbon-absorbing concrete B.

Embodiment 3

[0039] (1) Mix 180kg of slag portland cement, 120kg of slag powder with a vitreous content of 97.5wt%, 90kg of high-calcium fly ash with a calcium oxide content of 12.4wt%, and 9kg of sodium sodium sulfate to obtain a mixed Material;

[0040] (2) Mix the mixed material in the above step (1) with the aggregate of 1786kg to obtain the mixture, wherein the aggregate is stone and sand, and the sand ratio of the aggregate is 45%;

[0041] (3) Dissolve 3.8kg of sulfamate water reducer in 167.7kg of water to obtain an aqueous solution of water reducer;

[0042] (4) Add the water reducer aqueous solution in the step (3) to the mixture in the step (2), and stir evenly to obtain the low-carbon and carbon-absorbing concrete C.

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Abstract

The invention provides low-carbon and carbon-absorbing concrete and a preparation method thereof. The low-carbon and carbon-absorbing concrete comprises a gelation material, an aggregate, an exciting agent, a water reducing agent and water; in each cubic meter of concrete, the addition amount of the gelation material is 290-560kg; the addition amount of the aggregate is 1690-1860kg; the addition amount of the exciting agent is 6-12kg; the addition amount of the water reducing agent is 1.5-6kg; the water-binder ratio is 0.28-0.65; the gelation material comprises the following raw materials: cement, slag powder, high-calcium fly ash or added calcium fly ash; the exciting agent at least comprises one of sodium sulfate, natural gypsum and industrial gypsum and any one or more in instant sodium silicate, sodium carbonate, sodium bicarbonate, sodium hydroxide and sodium fluoride. The low-carbon and carbon-absorbing concrete is low-carbon concrete which is prepared from high-calcium fly ash or added calcium fly ash and has high strength, high stability and high carbon absorption performance under the condition that the cement amount is small.

Description

technical field [0001] The invention relates to a low-carbon and carbon-absorbing concrete and a preparation method thereof, belonging to the technical field of concrete engineering. Background technique [0002] Carbon dioxide is inevitably produced in the cement production process. According to the different stages of carbon dioxide production, the carbon dioxide emission in the cement production process can be divided into direct emission and indirect emission. Among them, the direct emission refers to the carbon dioxide produced by the decomposition of calcium carbonate in the cement production process. Carbon dioxide emissions, indirect emissions refer to the carbon dioxide produced by the combustion of cement kiln fuel and the carbon dioxide produced by electricity consumption during the cement production process. According to statistics, for every ton of cement produced, a total of about 0.8 tons of carbon dioxide is emitted directly and indirectly. Therefore, the ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/08C04B22/14
Inventor 张京涛李习章段遵莉王安岭武俊宇
Owner 北京东方建宇混凝土科学技术研究院有限公司
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