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A light-weight permeable concrete pavement brick and its preparation method

A technology for permeable concrete and pavement bricks, applied in the field of building materials, can solve the problems of low water permeability of foam concrete and affecting the opening rate of foam concrete bubbles, etc.

Active Publication Date: 2021-06-15
重庆中建西部建设有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above-mentioned patent documents, the arrangement direction of the fibers inside the foamed concrete matrix will greatly affect the opening ratio of the foamed concrete cells, resulting in lower than expected water permeability of the foamed concrete

Method used

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  • A light-weight permeable concrete pavement brick and its preparation method

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Comparison scheme
Effect test

Embodiment 1

[0039] In the light-weight permeable concrete pavement brick of this example, the alkaline activator is mixed with water glass (modulus 1.3) and plaster of paris in a mass ratio of 4:1, and the efflorescence inhibitor is 100% 5A zeolite. The foaming agent is 100% SHG, and the SHG powder weighed in proportion must be prepared into a foaming agent solution with a concentration of 0.3% before use.

[0040] The preparation process of the light-weight permeable concrete pedestrian pavement brick of the present embodiment is as follows:

[0041] 1) Weigh the raw materials, the mass percentage of each raw material is: ground slag 25%, cement 10%, fly ash 10%, pottery sand 15%, river sand 5%, alkaline activator 2%, pan-alkali inhibitor agent 5%, physical foaming agent 0.2%, chemical foaming agent 2%, manganese dioxide 1%, potassium carbonate 4%, water reducing agent 1%, water 19.8%.

[0042] 2) Put the ground slag, cement, fly ash, pottery sand, river sand, alkaline activator, efflor...

Embodiment 2

[0047] In the light permeable concrete pavement brick of this example, the alkaline activator is made of water glass (modulus 1.2) and plaster of paris in a mass ratio of 3:1, and the efflorescence inhibitor is made of 5A zeolite and calcium bentonite Mixed in a mass ratio of 3:2, the physical foaming agent is 100% SAES, and the SAES powder weighed in proportion must be made into a foaming agent solution with a concentration of 0.3% before use; Sand needs to be wetted to a saturated surface dry state.

[0048] The preparation process of the light-weight permeable concrete pedestrian pavement brick of the present embodiment is as follows:

[0049] 1) Weigh the raw materials, the mass percentage of each raw material is: ground slag 30%, cement 10%, fly ash 10%, pottery sand 5%, river sand 10%, alkaline activator 4%, pan-alkali inhibitor Agent 5%, physical foaming agent 0.1%, chemical foaming agent 2%, manganese dioxide 1%, potassium carbonate 2%, water reducing agent 3%, water ...

Embodiment 3

[0055] A light-weight permeable concrete pedestrian pavement brick, the alkaline activator is prepared by mixing water glass (modulus 1.2) and plaster of paris in a mass ratio of 7:3, and the pan-alkali inhibitor is composed of 5A zeolite and diatomaceous earth Mixed according to the mass ratio of 1:1, the physical foaming agent is 100% SDS, and the SDS powder weighed in proportion must be prepared into a foaming agent solution with a concentration of 0.3% before use; Sand needs to be wetted to a saturated surface dry state.

[0056] The preparation process of the light-weight permeable concrete pedestrian pavement brick of the present embodiment is as follows:

[0057] 1) Weigh the raw materials, the mass percentage of each raw material is: ground slag 25%, cement 5%, fly ash 5%, pottery sand 25%, alkaline activator 2%, pan-alkali inhibitor 3%, physical Foaming agent 0.3%, chemical foaming agent 4%, manganese dioxide 3%, potassium carbonate 4%, water reducing agent 1%, water...

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Abstract

The invention provides a lightweight permeable concrete pavement brick, which belongs to the technical field of building materials. Each component includes the following mass percentages: ground slag 20-30%, cement 5-10%, fly ash 5-10%, pottery sand 15-30%, river sand 0-10%, activator 2-4 %, efflorescence inhibitor 3-5%, physical foaming agent 0.1-0.3%, chemical foaming agent 2-4%, manganese dioxide 1-3%, potassium carbonate 2-4%, water reducer 1-3% %, water 15-25%. The invention also provides a preparation method of the pavement brick. The lightweight permeable concrete pavement brick developed by the present invention adopts a staged physical and chemical synergistic foaming method for the first time. First, a large number of closed pores are formed inside the matrix through a physical foaming agent, and then the chemical foaming agent continues to The air-entraining effect connects adjacent air pores, thus forming a large number of interconnected pores inside the concrete. The product of the invention has good water permeability and water storage performance, and has broad promotion and application prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a light-weight permeable concrete pedestrian pavement brick and a preparation method thereof. Background technique [0002] "Sponge city" is a new concept of urban stormwater management proposed by the state in recent years, which requires the infiltration, retention and purification of rainwater in the city on the basis of urban drainage and waterlogging prevention, so that rainwater can be fully utilized and realize a benign urban water cycle , to achieve the purpose of improving ecological protection. Permeable concrete is highly compatible with the construction concept of "sponge city" due to its efficient water permeability, and has gradually developed into the main basic material for the construction of "sponge city". However, at present, permeable concrete mainly achieves the purpose of water permeability by interlocking the internal aggregates to form pores. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B38/02C04B38/10
CPCC04B28/02C04B2111/00284C04B2201/20C04B2201/50C04B18/141C04B18/08C04B18/023C04B14/068C04B12/04C04B22/143C04B14/047C04B22/06C04B22/10C04B2103/302C04B38/10C04B38/02C04B14/104C04B14/08
Inventor 甘戈金张远徐国栋兰聪王斌
Owner 重庆中建西部建设有限公司
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