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Rapid permeable compressive concrete

A technology of permeable concrete and concrete, which is applied to cohesive pavement paved on site, climate change adaptation, pavement details, etc., and can solve problems such as loss of water permeability and damage to the internal structure of concrete

Pending Publication Date: 2021-10-15
抚州市正兴混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the special structure of pervious concrete, the compressive strength of pervious concrete is lower than that of other cements. When a large truck passes by, the internal structure of the concrete will be damaged and the permeable effect will be lost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0349] Water permeability coefficient and water permeability velocity of experimental example 1 concrete

[0350] The porosity and water permeability coefficient of the permeable concrete prepared in the examples and comparative examples are tested according to the standard of Shanghai Engineering Design Code DGJ08-"Technical Regulations for the Application of Permeable Concrete Pavement of Non-motor Vehicle Roads", and the final results are recorded in Table 1;

[0351] Table 1 Porosity and water permeability coefficient of concrete

[0352]

[0353] It can be obtained from Table 1 that the permeable concrete prepared in Examples 1-3 has good water permeability and an effective void ratio up to 20.1%, and the water permeability is excellent; Comparative Examples 1-3 did not layer or adopt permeable concrete The particle size of the stones in the raw materials is the same, so the effective porosity of the permeable concrete is reduced, and the water permeability coefficient...

experiment example 2

[0354] The compressive strength test of experimental example 2 concrete

[0355] The concretes prepared in Examples and Comparative Examples were tested according to the industry standard CJJT135-2009 "Technical Regulations for Permeable Cement Concrete Pavements", and the specific results are recorded in Table 2.

[0356] Table 2 Compressive strength of concrete over time

[0357]

[0358]It can be observed from Table 1 that the concrete of Examples 1-3 has excellent compressive strength after curing for 28 days, and the strength far exceeds the industry standard; Comparative Example 10 and Comparative Examples 12-14 change the formulation of the binder, so the permeable concrete The compressive strength of the concrete decreased significantly, and even did not meet the industry standard; Comparative Example 11 changed the process parameters of the binder preparation, so the structure of the binder changed, and the strength of the concrete decreased; Comparative Example 15...

experiment example 3

[0359] Experimental example 3 freeze-thaw cycle experiment of concrete

[0360] Through the industry standard CJJT135-2009 "Technical Regulations for Permeable Cement Concrete Pavement", the concrete prepared by the embodiment and the comparative example is tested for the loss rate of compressive strength and the rate of mass loss, and is tested by the embodiment and the comparative example. Each embodiment or A sample is selected for the comparative example, wherein the final data is recorded in Table 3;

[0361] Table 3 Freeze-thaw resistance test of permeable concrete

[0362]

[0363] As can be seen from Table 3, the compressive strength loss rate and mass loss rate of Examples 1-3 are in line with industry standards; Comparative Example 10 and Comparative Examples 12-13 change the formulation of the binder, so the strength and mass loss of permeable concrete The quality all has certain loss; Comparative Example 11 changes the preparation process of concrete, so the st...

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Abstract

The invention provides rapid permeable compressive concrete and a preparation method thereof. The permeable concrete is prepared into two layers, more stones with small particle sizes are contained in the permeable concrete on the surface layer, more stones with large particle sizes are contained in the permeable concrete on the bottom layer, and rainwater can be filtered and permeated through the special structure. A binder is added to increase the cohesiveness between the framework to improve the compressive strength, meanwhile, the concrete has the effect of a water reducing agent, and sodium nitrate, ammonium nitrite, ethylene glycol and other components have the effect of reducing the freezing point, so that the anti-freezing capacity of the concrete is improved. Modified steel fibers are added to support the concrete, so that the compressive strength of the concrete is improved. A water repellent agent is added into the permeable concrete, so that the contact time and area with water are reduced, water is quickly drained, water in the concrete is reduced, and the compressive strength and water permeability of the concrete are protected.

Description

technical field [0001] The invention belongs to the technical field of building material production, and in particular relates to a fast water-permeable compression-resistant concrete. [0002] technical background [0003] In recent years, my country's urbanization development momentum is strong, the urban built-up area has increased rapidly, and the urbanization rate has continued to increase. my country's urbanization rate increased steadily from 10.6% in 1949 to 19.4% in 1980. By the end of 2020, the urbanization rate of my country's permanent population will exceed 60%. With the rapid development of China's urban construction, various problems caused by urban ground hardening are becoming more and more obvious. Nowadays, most cities will experience a series of problems such as frequent urban waterlogging and deterioration of urban water environment during the rainy season. This is due to the use of too many impermeable materials, which makes the originally bare soil co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/02C04B14/48E01C7/14E01C11/22
CPCC04B28/04C04B20/023C04B14/48E01C11/226E01C7/142C04B2111/00284C04B2201/50C04B18/146C04B18/141C04B2103/44C04B2103/65C04B14/02Y02A30/60
Inventor 吴康张雪峰聂文俊张诗涵
Owner 抚州市正兴混凝土有限公司
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