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High-strength self-cleaning permeable surface layer mortar and preparation method thereof

A self-cleaning, mortar technology, applied in the field of building materials, can solve the problems of unsatisfactory durability and poor mechanical properties, and achieve the effects of improved mechanical properties, high compressive strength, and good water permeability

Pending Publication Date: 2018-09-18
北京宝辰联合科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Permeable concrete is generally composed of surface mortar and bottom macroporous concrete. The surface mortar has poor mechanical properties and durability cannot meet the requirements during use. Improving the surface mortar of permeable concrete has become an urgent problem to be solved.

Method used

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  • High-strength self-cleaning permeable surface layer mortar and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] A high-strength self-cleaning permeable surface layer mortar includes the following raw materials in parts by weight: 100 parts of cement, 360 parts of machine-made sand, 1.0 part of water reducing agent, 1.0 part of aminated nano-silica, 1.0 part of nano-titanium dioxide, and 25 parts of water; Among them, the cement is P.O52.5 cement, and its specific surface area is greater than 280m 2 / kg; the particle size of the machine-made sand is 2.36-4.75mm, and the content of stone powder in the machine-made sand is not more than 0.5%; the water-reducing agent is a naphthalene-based water-reducer; The particle size of nano titanium dioxide is 25nm.

[0031] Among them, the aminated nano-silica is prepared by the following method: put 10g of nano-silica into 200ml of absolute ethanol, disperse it by ultrasonic waves for 6min while stirring, add 1ml of ammonia water drop by drop under the condition of sealing, and then drop by drop Add 3ml of silane coupling agent—γ-aminopropy...

Embodiment 2

[0039] A high-strength self-cleaning permeable surface mortar includes the following raw materials in parts by weight: 80 parts of cement, 350 parts of machine-made sand, 0.5 parts of water reducer, 0.5 parts of aminated nano-silica, 0.5 parts of nano-titanium dioxide, and 30 parts of water; Among them, the cement is P.O52.5 cement, and its specific surface area is greater than 280m 2 / kg; the particle size of the machine-made sand is 2.36-4.75mm, and the content of stone powder in the machine-made sand is not more than 0.5%; the water reducing agent is polycarboxylate water reducing agent; the particle size of the aminated nano-silica is 50-100nm , The particle size of nano-titanium dioxide is 25nm.

[0040] Among them, the aminated nano-silica is prepared by the following method: put 10g of nano-silica into 200ml of absolute ethanol, disperse it by ultrasonic waves for 5min while stirring, add 1ml of ammonia water drop by drop under the condition of sealing, and then drop by...

Embodiment 3

[0048] A high-strength self-cleaning permeable surface mortar includes the following raw materials in parts by weight: 120 parts of cement, 400 parts of machine-made sand, 1.5 parts of water reducing agent, 2 parts of aminated nano-silica, 2 parts of nano-titanium dioxide, and 30 parts of water; Among them, the cement is P.O52.5 cement, and its specific surface area is greater than 280m 2 / kg; the particle size of the machine-made sand is 2.36-4.75mm, and the content of stone powder in the machine-made sand is not more than 0.5%; the water reducing agent is polycarboxylate water reducing agent; the particle size of the aminated nano-silica is 50-100nm , The particle size of nano-titanium dioxide is 25nm.

[0049] Among them, the aminated nano-silica is prepared by the following method: put 10g of nano-silica into 200ml of absolute ethanol, disperse it by ultrasonic waves for 10min while stirring, add 1ml of ammonia water drop by drop under the condition of sealing, and then dr...

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Abstract

The invention discloses a high-strength self-cleaning permeable surface layer mortar and a preparation method thereof. The mortar contains the following materials in parts by weight: 80-120 parts of cement, 350-400 parts of machine-made sand, 0.5-1.5 parts of a water reducing agent, 0.5-2 parts of aminated nano silica, 0.5-2 parts of nano titania, and 20-30 parts of water. According to the invention, for nano titania, aminated nano silica with relatively large particles is taken as a carrier, so that nano titania can be better dispersed in the mortar material, thus being more beneficial for the exertion of the photocatalysis property; aminated nano silica and nano titania achieve a synergistic effect with other material components, so that the prepared surface layer mortar is high in compressive strength, good in permeability performance and good in photocatalysis effect.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-strength self-cleaning water-permeable surface layer mortar and a preparation method thereof. technical background [0002] Cement concrete is the most widely used building material in modern times. Permeable concrete is aimed at the defects of urban road surfaces. It is developed and used to allow rainwater to flow into the ground, effectively replenish groundwater, and alleviate some urban environmental problems such as the sharp drop in the city's groundwater level. At the same time, it is an excellent pavement material that protects groundwater, maintains ecological balance, and can alleviate the urban heat island effect; it is beneficial to the sound development of the human living environment and has special significance in urban rainwater management and water pollution prevention and control. Permeable concrete is generally composed of surfac...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/00C04B20/02C04B14/06
CPCC04B20/023C04B28/04C04B2111/00284C04B2111/2061C04B14/06C04B24/226C04B14/062C04B14/305C04B20/008C04B38/0041C04B2103/302
Inventor 王义
Owner 北京宝辰联合科技股份有限公司
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