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Limestone powder porous cement concrete material for dock chamber bottom plate drainage cushion layer and preparation method thereof

A technology of cement concrete and limestone powder, which is applied in application, household appliances, ceramic products, etc., can solve the problems of high maintenance cost, large impact on erosion, short service life, etc., and achieves enhanced mechanical properties, reduced cement consumption, and improved mechanical properties. Effect

Inactive Publication Date: 2021-03-19
HUNAN CSCEC5B CONCRETE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the dock where the dock door needs to be closed in port engineering, the large water level changes caused by the entry and exit of ships often make the walls on both sides of the dock room and the road surface structure bear high water pressure, which is greatly affected by erosion, resulting in a short service life. and higher maintenance costs

Method used

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  • Limestone powder porous cement concrete material for dock chamber bottom plate drainage cushion layer and preparation method thereof

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Effect test

Embodiment 1

[0036] The cement is Gezhouba Shimen P•LH42.5 low-heat cement, with a compressive strength of 46.1MPa at 28 days; the fly ash is F II grade fly ash of Hainan Dongfang Power Plant, with a fineness of 15%, a water demand ratio of 97%, and an activity of 77% at 28 days; The limestone powder is Hainan Lingshui limestone powder, 45μm square hole sieve 19%, calcium carbonate content 82%, 7d compressive strength ratio 64%, 28d compressive strength ratio 70%; polymer emulsion is Suzhou Institute of Building Research Co., Ltd. The SJ type milky white liquid produced by the company has a solid content of 50% and a density of 1.07g / cm 3 , pH value 5; the crushed stone is Hainan Tiefugang crushed stone, 10-20mm continuous gradation, crushing value 10.8%; the water reducer is high performance polycarboxylate water reducer, the solid content is 10%, 23%; water is tap water.

[0037] A preparation method for the limestone powder porous cement concrete material used for the drainage cushion ...

Embodiment 2

[0045]The cement is Gezhouba Shimen P•LH42.5 low-heat cement, with a compressive strength of 46.1MPa at 28 days; the fly ash is F II grade fly ash of Hainan Dongfang Power Plant, with a fineness of 15%, a water demand ratio of 97%, and an activity of 77% at 28 days; The limestone powder is Hainan Lingshui limestone powder, 45μm square hole sieve 19%, calcium carbonate content 82%, 7d compressive strength ratio 64%, 28d compressive strength ratio 70%; polymer emulsion is Suzhou Institute of Building Research Co., Ltd. The SJ type milky white liquid produced by the company has a solid content of 50% and a density of 1.07g / cm 3 , pH value 5; the crushed stone is Hainan Tiefugang crushed stone, 10-20mm continuous gradation, crushing value 10.8%; the water reducer is high performance polycarboxylate water reducer, the solid content is 10%, 23%; water is tap water.

[0046] A preparation method for the limestone powder porous cement concrete material used for the drainage cushion o...

Embodiment 3

[0054] The cement is Gezhouba Shimen P•LH42.5 low-heat cement, with a compressive strength of 46.1MPa at 28 days; the fly ash is F II grade fly ash of Hainan Dongfang Power Plant, with a fineness of 15%, a water demand ratio of 97%, and an activity of 77% at 28 days; The limestone powder is Hainan Lingshui limestone powder, 45μm square hole sieve 19%, calcium carbonate content 82%, 7d compressive strength ratio 64%, 28d compressive strength ratio 70%; polymer emulsion is Suzhou Institute of Building Research Co., Ltd. The SJ type milky white liquid produced by the company has a solid content of 50% and a density of 1.07g / cm 3 , pH value 5; the crushed stone is Hainan Tiefugang crushed stone, 10-20mm continuous gradation, crushing value 10.8%; the water reducer is high performance polycarboxylate water reducer, the solid content is 10%, 23%; water is tap water.

[0055] A preparation method for the limestone powder porous cement concrete material used for the drainage cushion ...

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Abstract

The invention relates to a limestone powder porous cement concrete material for a dock chamber bottom plate drainage cushion layer and a preparation method thereof. The limestone powder porous cementconcrete material is composed of low-heat cement, fly ash, limestone powder, a polymer emulsion, 10-20mm broken stone, water and a water reducing agent. The limestone powder porous cement concrete material is adopted as the dock chamber bottom plate cushion layer, and the porosity is large, the limestone powder porous cement concrete material is convenient to accumulate and discharge water broughtby ships going in and out of docks, reduces water pressure and scouring damage borne by walls and pavement structures, increases a preliminary aggregate wetting step in the limestone powder porous cement concrete material preparation process, facilitates full coating of slurry on the surface of aggregate, has good mixture working performance, and is convenient for construction and maintenance, proper limestone powder is matched with low-heat cement, so that the mechanical properties of the porous concrete are improved, the porous concrete is durable and applicable, and the limestone powder iseasily available in production, low in price and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of concrete preparation, and in particular relates to a limestone powder porous cement concrete material used for the drainage cushion of the bottom plate of a dock chamber and a preparation method thereof. Background technique [0002] In the dock where the dock door needs to be closed in port engineering, the large water level changes caused by the entry and exit of ships often make the walls on both sides of the dock room and the road surface structure bear high water pressure, which is greatly affected by erosion, resulting in a short service life. And the maintenance cost is higher. Therefore, porous cement concrete is used as a drainage cushion to reduce the adverse effects of water pressure. Porous cement concrete is a kind of cement concrete material composed of special grades, with little or no sand and many and large internal pores. This cement concrete material has great advantages in environment...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B28/04C04B111/40
CPCC04B28/04C04B2111/0075C04B2111/00284C04B2111/40C04B2201/50
Inventor 李蒙强何彦琪谢锦优王军李曦蒋震冷政黄辉游涛
Owner HUNAN CSCEC5B CONCRETE
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