Lightweight waterproof concrete blocks used in river channel and preparation method of concrete blocks

A waterproof concrete, lightweight technology, applied in the field of river management engineering, can solve problems such as few concrete blocks, achieve good compactness, improve waterproof performance and strength, and good waterproof effect.

Active Publication Date: 2019-11-15
北京绿都锦绣水务建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of bank revetment construction, lead wire gabions are generally filled with stones of certain specifications and meeting requirements to form a self-permeable, flexible, ecological protection structure. Lead wire gabions play a role in slope protection and foot protection, but Lead wire gabions are generally filled with stones, and concrete blocks are rarely used instead of stones for filling. Therefore, it is urgent to study a lightweight waterproof concrete block specially used in lead wire gabions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A lightweight waterproof concrete block used for river courses, its raw material ratio is shown in Table 1 and Table 2.

[0043] (1) Stir and mix water, cement, crushed stone, ceramsite, slag powder, fly ash, and composite waterproof admixture evenly to obtain a mixture;

[0044] (2) Pouring the mixture in the mould, pressing and forming to obtain the primary product;

[0045] (3) Carry out the first curing for the primary product with the mold at a temperature of 35° C., a relative humidity of 70%, and a pressure of 0.1 MPa. The curing time is 6 hours to obtain a semi-finished product;

[0046](3) The semi-finished product is demoulded and cut into pieces, and then the temperature is gradually raised at a rate of 10°C / min, and the second curing is carried out under the conditions of a temperature of 60°C, a relative humidity of 85%, and a pressure of 0.1MPa. The curing time is 2 hours, and then the temperature and pressure are gradually increased. The temperature incr...

Embodiment 2

[0049] A lightweight waterproof concrete block used for river courses, its raw material ratio is shown in Table 1 and Table 2.

[0050] (1) Stir and mix water, cement, crushed stone, ceramsite, slag powder, fly ash, and composite waterproof admixture evenly to obtain a mixture;

[0051] (2) Pouring the mixture in the mould, pressing and forming to obtain the primary product;

[0052] (3) Carry out the first curing for the primary product with the mold under the conditions of temperature of 40°C, relative humidity of 80%, and pressure of 0.1 MPa, and the curing time is 5 hours to obtain a semi-finished product;

[0053] (3) The semi-finished product is demolded and cut into pieces, and then the temperature is gradually raised at a rate of 10°C / min, and the second curing is carried out under the conditions of a temperature of 70°C, a relative humidity of 90%, and a pressure of 0.1MPa. The curing time is 1 hour, and then the temperature and pressure are gradually increased. The ...

Embodiment 3

[0056] A lightweight waterproof concrete block used for river courses, its raw material ratio is shown in Table 1 and Table 2.

[0057] (1) Stir and mix water, cement, crushed stone, ceramsite, slag powder, fly ash, and composite waterproof admixture evenly to obtain a mixture;

[0058] (2) Pouring the mixture in the mould, pressing and forming to obtain the primary product;

[0059] (3) Carry out the first curing for the primary product with the mould, under the condition that the temperature is 38° C., the relative humidity is 75%, and the pressure is 0.1 MPa, and the curing time is 5.5 hours to obtain a semi-finished product;

[0060] (3) The semi-finished product is demolded and cut into pieces, and then the temperature is gradually raised at a rate of 10°C / min. Under the conditions of a temperature of 65°C, a relative humidity of 88%, and a pressure of 0.1MPa, the second curing is carried out. The curing time is 1.5h, and then the temperature and pressure are gradually i...

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Abstract

The invention relates to lightweight waterproof concrete blocks used in a river channel and a preparation method of the concrete blocks, and belongs to the technical field of river control engineering. The lightweight waterproof concrete blocks comprise the following raw materials: water, cement, crushed stone, ceramsite, mineral slag powder, fly ash and a composite waterproof admixture, wherein the composite waterproof admixture comprises the following materials: water, a water reducing agent, sodium methylsiliconate, sodium dodecyl sulfonate, heavy calcium carbonate, calcium acrylate, calcium hydroxide, sodium silicate, silica fume, nano aluminum oxide, titanium dioxide, pozzolan and polypropylene fibers; and the method comprises the following steps: performing mixing, performing compression moulding, performing maintenance for multiple times, and performing cutting to obtain the lightweight waterproof concrete blocks. The lightweight waterproof concrete blocks used in the river channel provided by the invention not only have the advantages of good water resistance, good compactness and higher strength, but also have the advantages of a light mass and a low price; and an occurrence of cracking generated at the surface during preparation is reduced, the finished-product rate is improved, and the concrete blocks are suitable for gabions in river channel revetment construction.

Description

technical field [0001] The invention relates to the technical field of river channel regulation engineering, more specifically, it relates to a lightweight waterproof concrete block used for river channels and a preparation method thereof. Background technique [0002] Concrete usually uses cement as the cementitious material, sand and stone as aggregates, mixed with water and admixtures in a certain proportion, and then mixed to obtain concrete. Concrete has the advantages of easy molding, low energy consumption, and cheap price. Widely applied to architecture, it plays a very important role in the development of human society. [0003] In recent years, with the continuous development of the concrete industry, concrete has also been applied in the technical field of river revetment engineering construction, such as concrete revetment bricks on both sides of the river. In the process of bank revetment construction, lead wire gabions are generally filled with stones of certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B111/40C04B111/27
CPCC04B28/00C04B2111/00008C04B2111/27C04B2111/40C04B2201/50C04B18/12C04B18/023C04B18/141C04B18/08C04B2103/302C04B12/04C04B24/16C04B14/28C04B24/04C04B22/064C04B18/146C04B14/303C04B14/305C04B7/12C04B16/0633
Inventor 王宝玲甄静
Owner 北京绿都锦绣水务建设有限公司
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