Pervious concrete and preparation method thereof

Abstract

The invention discloses pervious concrete and a preparation method thereof, and belongs to the technical field of a building material. The pervious concrete is prepared from the following raw materials in proportion by weight: 200 to 300kg / m<3> of ordinary Portland cement, 1250 to 1350kg / m<3> of coarse aggregate, 150 to 280kg / m<3> of mineral admixtures, 10 to 15kg / m<3> of EVA emulsion, 5 to 10kg / m<3> of enhancers and composite anti-freezing agents, wherein the weight of the composite anti-freezing agents account for 1 to 2.5 percent of the total weight of the concrete; the water cement ratio of the concrete is 0.2 to 0.31; the composite anti-freezing agents are prepared from triethanolamine, sulfamate and lignosulphonate according to a mass ratio of (5 to 8):(1 to 2):(1 to 2). The perviousconcrete has the advantages that a good pervious effect is achieved; the compressive strength is high; the freezing and thawing resistant performance is good.

Description

technical field

[0001] The invention relates to concrete, in particular to a permeable concrete and a preparation method thereof, belonging to the technical field of building materials. Background technique

[0002] Permeable concrete is a mixture of cement, water, and cementing materials blended with aggregate, and has a certain porosity. When it is made into concrete pavement, slope protection and its products, it can allow rainwater to flow into the ground, effectively replenish groundwater, alleviate some urban environmental problems such as the sharp drop in the city's groundwater level; and can effectively eliminate oil compounds on the ground, etc. Harm to environmental pollution; 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 has special features in the benign development of the human living environment, urban rainwater management, and water pollution p...

Examples

Embodiment 1

[0027] A permeable concrete, including the following raw materials configured by weight: Ordinary Portland cement 200kg / m 3 , coarse aggregate 1250kg / m 3 , mineral admixture 150kg / m 3 , EVA emulsion 10kg / m 3 , enhancer 5kg / m 3 And composite antifreeze, the weight of the composite antifreeze is 1% of the total weight of concrete; the water-cement ratio of the concrete is 0.2;

[0028] The composite antifreeze agent comprises triethanolamine, sulfamate and lignosodium, and the mass ratio of the triethanolamine, sulfamate and lignosodium is 5:1:1.

[0029] In this example, the ordinary Portland cement is P·O 52.5, and its strength is higher; the coarse aggregate is selected from crushed stones with a particle size within the range of 9 to 12 mm, and its mud content is ≤0.5%, and the needle shape is less than 10%, the mineral admixture is sulfur-fixed ash.

Embodiment 2

[0031] A permeable concrete, including the following raw materials configured by weight: Ordinary Portland cement 300kg / m 3 , coarse aggregate 1350kg / m 3 , mineral admixture 280kg / m 3 , EVA emulsion 15kg / m 3 , enhancer 5 ~ 10kg / m 3 And composite antifreeze, the weight of the composite antifreeze is 2.5% of the total weight of concrete; the water-cement ratio of the concrete is 0.31;

[0032] The compound antifreeze agent comprises triethanolamine, sulfamate and lignosodium, and the mass ratio of the triethanolamine, sulfamate and lignosodium is 4:1:1.

[0033] In this example, the ordinary Portland cement is P·O 52.5, and its strength is higher; the particle size of the coarse aggregate is 9-12mm, the mud content is ≤0.5%, and the crushed stones of needle-shaped <10%, mineral The admixture is at least one kind of slag.

Embodiment 3

[0035] A permeable concrete, including the following raw materials configured by weight: Ordinary Portland cement 220kg / m 3 , coarse aggregate 1300kg / m 3 , mineral admixture 210kg / m 3 , EVA emulsion 12kg / m 3 , enhancer 8kg / m 3 And composite antifreeze, the weight of the composite antifreeze is 2% of the total weight of concrete; the water-cement ratio of the concrete is 0.25;

[0036] The composite antifreeze agent includes triethanolamine, sulfamic acid salt and lignosodium, and the mass ratio of the triethanolamine, sulfamic acid salt and lignosodium is 6:1:1.

[0037] In this example, the ordinary Portland cement is P·O 52.5, and its strength is higher; the particle size of the coarse aggregate is 9-12mm, the mud content is ≤0.5%, and the crushed stones of needle-shaped <10%, mineral Admixtures are slag and sulfur-fixed ash.

technical field

[0001] The invention relates to concrete, in particular to a permeable concrete and a preparation method thereof, belonging to the technical field of building materials. Background technique

[0002] Permeable concrete is a mixture of cement, water, and cementing materials blended with aggregate, and has a certain porosity. When it is made into concrete pavement, slope protection and its products, it can allow rainwater to flow into the ground, effectively replenish groundwater, alleviate some urban environmental problems such as the sharp drop in the city's groundwater level; and can effectively eliminate oil compounds on the ground, etc. Harm to environmental pollution; 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 has special features in the benign development of the human living environment, urban rainwater management, and water pollution p...

Examples

Embodiment 1

[0027] A permeable concrete, including the following raw materials configured by weight: Ordinary Portland cement 200kg / m 3 , coarse aggregate 1250kg / m 3 , mineral admixture 150kg / m 3 , EVA emulsion 10kg / m 3 , enhancer 5kg / m 3 And composite antifreeze, the weight of the composite antifreeze is 1% of the total weight of concrete; the water-cement ratio of the concrete is 0.2;

[0028] The composite antifreeze agent comprises triethanolamine, sulfamate and lignosodium, and the mass ratio of the triethanolamine, sulfamate and lignosodium is 5:1:1.

[0029] In this example, the ordinary Portland cement is P·O 52.5, and its strength is higher; the coarse aggregate is selected from crushed stones with a particle size within the range of 9 to 12 mm, and its mud content is ≤0.5%, and the needle shape is less than 10%, the mineral admixture is sulfur-fixed ash.

Embodiment 2

[0031] A permeable concrete, including the following raw materials configured by weight: Ordinary Portland cement 300kg / m 3 , coarse aggregate 1350kg / m 3 , mineral admixture 280kg / m 3 , EVA emulsion 15kg / m 3 , enhancer 5 ~ 10kg / m 3 And composite antifreeze, the weight of the composite antifreeze is 2.5% of the total weight of concrete; the water-cement ratio of the concrete is 0.31;

[0032] The compound antifreeze agent comprises triethanolamine, sulfamate and lignosodium, and the mass ratio of the triethanolamine, sulfamate and lignosodium is 4:1:1.

[0033] In this example, the ordinary Portland cement is P·O 52.5, and its strength is higher; the particle size of the coarse aggregate is 9-12mm, the mud content is ≤0.5%, and the crushed stones of needle-shaped <10%, mineral The admixture is at least one kind of slag.

Embodiment 3

[0035] A permeable concrete, including the following raw materials configured by weight: Ordinary Portland cement 220kg / m 3 , coarse aggregate 1300kg / m 3 , mineral admixture 210kg / m 3 , EVA emulsion 12kg / m 3 , enhancer 8kg / m 3 And composite antifreeze, the weight of the composite antifreeze is 2% of the total weight of concrete; the water-cement ratio of the concrete is 0.25;

[0036] The composite antifreeze agent includes triethanolamine, sulfamic acid salt and lignosodium, and the mass ratio of the triethanolamine, sulfamic acid salt and lignosodium is 6:1:1.

[0037] In this example, the ordinary Portland cement is P·O 52.5, and its strength is higher; the particle size of the coarse aggregate is 9-12mm, the mud content is ≤0.5%, and the crushed stones of needle-shaped <10%, mineral Admixtures are slag and sulfur-fixed ash.

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