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Cement-based paving blocks for photocatalytic paving for the abatement of urban pollutants

A technology of photocatalysis and pollutants, which is applied to the pavement, buildings, roads and other directions paved with prefabricated blocks, and can solve the problems of increasing the smoothness of the paving block material and reducing the smoothness

Inactive Publication Date: 2006-03-22
ITALCEMENTI SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this amount of TiO 2 The disadvantage is that it increases the smoothness of the paving block, and the smoothness can be reduced by adding an appropriate amount of sand to the mix

Method used

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  • Cement-based paving blocks for photocatalytic paving for the abatement of urban pollutants
  • Cement-based paving blocks for photocatalytic paving for the abatement of urban pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0066] According to a typical embodiment of the present invention, said intervention mix-precursor of the cementitious composition comprises the following inorganic components: at least one hydraulic binder (generally cement); at least one aggregate or inert material; Optional fillers of mineral origin or inorganic materials, which are synonymous with each other according to the invention; the aforementioned photocatalyst and, where necessary, water. The types and preferred amounts of hydraulic binder, aggregates and optionally fillers of mineral origin are the same as specified below for the cementitious composition.

[0067] The preferred cementitious compositions of the invention and their precursors - corresponding intervention mixes, which are particularly suitable for the preparation of paving blocks according to the invention for photocatalytic paving, in addition to the aforementioned photocatalysts, hydraulic binders (generally cement), the following inorganic materia...

Embodiment 1

[0086]

[0087] The amount of water is 6-6.5% by mass of the dry inorganic material.

Embodiment 2

[0089]

[0090] The amount of water is 7-7.5% by mass of the dry inorganic material.

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Abstract

Paving blocks for photocatalytic paving comprising at least a base layer in cementitious material and a surface layer based on a cementitious composition comprising: at least a hydraulic binder, a photocatalyst capable of oxidizing organic and inorganic polluting substances present in the environment in the presence of environmental light, air and humidity, at least an aggregate, water and, optionally, a water reducing additive.

Description

technical field [0001] The present invention relates to cement-based paving blocks for use in photocatalytic paving for the reduction of urban pollutants, and more particularly to paving blocks comprising a surface layer and a base layer having bonding properties, wherein the surface layer Based on a cementitious composition with photocatalytic properties capable of reducing organic and inorganic pollutants such as polycondensates of aromatic hydrocarbons, aldehydes, benzene, carbon black equivalent to PM10, oxides of nitrogen (NO x ) and sulfur oxides (SO x ), carbon monoxide (CO). Background technique [0002] Air pollution is caused by the presence of one or more unwanted or foreign substances in the air, the amount and duration of which change the clean air and cause harm to human health. [0003] Considering the amount of air each person inhales per day (6-9 liters of air per minute at rest, or 9-13 cubic meters of air per day), it is easy to understand the importance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/30C04B28/02E01C5/06
CPCC04B2111/802C04B14/305C04B2111/00827E01C5/06C04B2111/00482C04B2111/1006Y10T428/249921Y10T428/25C04B28/02Y02W30/91C04B14/06C04B14/106C04B18/08C04B18/141C04B18/146C04B40/0608C04B2103/32
Inventor L·卡萨尔R·库奇托雷C·佩佩
Owner ITALCEMENTI SPA
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