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Light pervious concrete sidewalk surface brick and preparation method thereof

A technology for permeable concrete and pavement bricks, which is applied in the field of building materials, can solve the problems affecting the open cell rate of foam concrete, low water permeability of foam concrete, etc. The effect of water storage performance

Active Publication Date: 2018-09-28
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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  • Light pervious concrete sidewalk surface brick and preparation method thereof

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Embodiment 1

[0039] In the lightweight permeable concrete pavement bricks of this embodiment, the alkaline activator is mixed with water glass (modulus 1.3) and plaster of paris at 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 made into a foaming agent solution with a concentration of 0.3% before use; the weighed pottery sand needs to be moistened to reach a saturated surface dry state.

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

[0041] 1) The raw materials are weighed, and the mass percentage of each raw material is: 25% of ground slag, 10% of cement, 10% of fly ash, 15% of pottery sand, 5% of river sand, 2% of alkaline activator, efflorescence 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%.

[...

Embodiment 2

[0047] In the lightweight permeable concrete pavement bricks of this embodiment, the alkaline activator is mixed with water glass (with a modulus of 1.2) and plaster of paris at a mass ratio of 3:1, and the efflorescence inhibitor is composed of 5A zeolite and calcium-based bentonite It is mixed according to the mass ratio of 3:2, and 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; The sand needs to be wetted to reach a saturated surface dry state.

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

[0049] 1) The raw materials are weighed, and the mass percentages of each raw material are: 30% of ground slag, 10% of cement, 10% of fly ash, 5% of pottery sand, 10% of river sand, 4% of alkaline activator, efflorescence inhibitor Agent 5%, physical foaming agent 0.1%, chemical foaming agent 2...

Embodiment 3

[0055] A lightweight permeable concrete pavement brick, the alkaline activator is mixed with water glass (modulus 1.2) and plaster of paris at a mass ratio of 7:3, and the efflorescence inhibitor is made of 5A zeolite and diatomite It is 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 made into a foaming agent solution with a concentration of 0.3% before use; The sand needs to be wetted to reach a saturated surface dry state.

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

[0057] 1) The raw materials are weighed, and the mass percentages of each raw material are: 25% of ground slag, 5% of cement, 5% of fly ash, 25% of pottery sand, 2% of alkaline activator, 3% of efflorescence inhibitor, physical Foaming agent 0.3%, chemical foaming agent 4%, manganese dioxide 3%, potassium carbonate 4%, water reducing agent 1%, water 22...

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Abstract

The invention provides a light pervious concrete sidewalk surface brick and a preparation method thereof, and belongs to the technical field of building materials. The side walk surface brick is prepared from, by mass, 20-30% of ground furnace slag, 5-10% of cement, 5-10% of coal ash, 15-30% of pottery sand, 0-10% of river sand, 2-4% of exciting agent, 3-5% of saltpetering inhibitor, 0.1-0.3% of physical foaming agent, 2-4% of chemical foaming agent, 1-3% of manganese dioxide, 2-4% of potassium carbonate, 1-3% of water reducer and 15-25% of water. The invention further provides a preparation method for the sidewalk surface brick. According to the developed light pervious concrete sidewalk surface brick, a method of staged physical and chemical collaborative foaming is firstly adopted, thephysical foaming agent is used for forming a large number of airtight air holes inside a substrate, and the continue air entraining effect of the chemical foaming agent is utilized to make adjacent air holes be communicated, therefore a large number of communicated hole gaps are formed inside concrete. The brick has better permeable performance and better water storage performance and has a wide popularization application prospect.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a lightweight permeable concrete pavement brick and a preparation method thereof. Background technique [0002] "Sponge city" is a new concept of urban rain and flood management proposed by the state in recent years, which requires ensuring 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 a benign water cycle in the city can be realized , to achieve the purpose of improving ecological protection. Permeable concrete is highly compatible with the construction concept of "sponge city" due to its high 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 through the interlocking of internal aggregate...

Claims

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Application Information

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Patent Type & Authority Applications(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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