Cast-in-place combined pavement slab for airport and preparation method

Abstract

The invention discloses an airport cast-in-situ combined pavement slab and a preparation method. The pavement slab is composed of an upper layer, a lower layer and a middle layer, wherein the upper layer and the lower layer are made of engineering cement-based composite materials; the method has the advantages that the phenomenon of tensile cracking of the pavement slab can be reduced by utilizing the ultrahigh tensile toughness and micro-crack control capability of the ECC material, even if the pavement slab is cracked, the crack width is less than 100 microns, the material can work with cracks, and meanwhile, the cracks can be basically healed after three to four dry-wet cycles in an open-air environment. The ECC material has high bending deformation capacity, so that arching fracture damage of the airport pavement slab caused by temperature gradient can be avoided. In addition, the upper layer of the airport pavement slab is made of ECC materials, FOD can be reduced to a great extent, noise is lower when an airplane slides, and the environment for passengers is more comfortable. According to the airport combined pavement slab structural form adopted by the invention, the mechanical property of the ECC material can be fully utilized, and the manufacturing cost is greatly reduced.

Description

technical field

[0001] The invention belongs to the technical field of airport engineering, and in particular relates to an airport cast-in-place composite track panel and a preparation method. Background technique

[0002] As the most important part of airport facilities, airport pavement is the necessary infrastructure for aircraft taxiing, take-off and landing. The safety of the airport pavement can directly determine whether the aircraft can operate safely and whether the airport can operate safely. At present, most of the new airport pavements in my country are made of cement concrete pavement. This kind of pavement has good compressive and flexural resistance, and its designed service life can reach 20-30 years. However, due to improper design, construction, use and external environmental impact, For example, ice and snow removal in winter, sunshine in summer, etc., often start to appear early diseases after 5-7 years of use, such as cracking, plate fracture, loose sur...

Examples

Embodiment 1

[0021] like figure 1 As shown, the airport cast-in-place composite road panel provided in this embodiment is composed of an upper layer 1 and a lower layer 3 made of engineering cement-based composite materials and an intermediate layer 2 made of dry hard concrete; the upper layer 1 and the lower layer 3 are both It is composed of water, cement, fly ash, quartz sand, HCSA expansion agent, PVA fiber and polycarboxylate water reducer, among which water, cement, fly ash, quartz sand, HCSA expansion agent and polycarboxylate water reducer are The weight ratio is 35:40:50:35:12:0.2, and the volume content of PVA fiber accounts for 2% of the total volume of the upper or lower layer. Among them, Portland cement of 42.5 strength grade is used for cement; first-grade fly ash is used for fly ash; and 90-mesh fine quartz sand is used for quartz sand. The thickness of the upper layer 1, the middle layer 2 and the lower layer 3 is determined according to the airport class and the required...

Embodiment 2

[0029] like figure 1 As shown, the airport cast-in-place composite road panel provided in this embodiment is composed of an upper layer 1 and a lower layer 3 made of engineering cement-based composite materials and an intermediate layer 2 made of dry hard concrete; the upper layer 1 and the lower layer 3 are both It is composed of water, cement, fly ash, quartz sand, HCSA expansion agent, PVA fiber and polycarboxylate water reducer, among which water, cement, fly ash, quartz sand, HCSA expansion agent and polycarboxylate water reducer are The weight ratio is 40:45:55:40:15:0.2, and the volume content of PVA fiber accounts for 1.5% of the total volume of the upper or lower layer. Among them, Portland cement of 42.5 strength grade is used for cement; first-grade fly ash is used for fly ash; and 100-mesh fine quartz sand is used for quartz sand. The thickness of the upper layer 1, the middle layer 2 and the lower layer 3 is determined according to the airport class and the requi...

Embodiment 3

[0032] like figure 1 As shown, the airport cast-in-place composite road panel provided in this embodiment is composed of an upper layer 1 and a lower layer 3 made of engineering cement-based composite materials and an intermediate layer 2 made of dry hard concrete; the upper layer 1 and the lower layer 3 are both It is composed of water, cement, fly ash, quartz sand, HCSA expansion agent, PVA fiber and polycarboxylate water reducer, among which water, cement, fly ash, quartz sand, HCSA expansion agent and polycarboxylate water reducer are The weight ratio is 30:35:45:30:10:0.1, and the volume dosage of PVA fiber accounts for 1% of the total volume of the upper or lower layer. Among them, Portland cement of 42.5 strength grade is used for cement; first-grade fly ash is used for fly ash; and 120-mesh fine quartz sand is used for quartz sand. The thickness of the upper layer 1, the middle layer 2 and the lower layer 3 is determined according to the airport class and the required...

technical field

[0001] The invention belongs to the technical field of airport engineering, and in particular relates to an airport cast-in-place composite track panel and a preparation method. Background technique

[0002] As the most important part of airport facilities, airport pavement is the necessary infrastructure for aircraft taxiing, take-off and landing. The safety of the airport pavement can directly determine whether the aircraft can operate safely and whether the airport can operate safely. At present, most of the new airport pavements in my country are made of cement concrete pavement. This kind of pavement has good compressive and flexural resistance, and its designed service life can reach 20-30 years. However, due to improper design, construction, use and external environmental impact, For example, ice and snow removal in winter, sunshine in summer, etc., often start to appear early diseases after 5-7 years of use, such as cracking, plate fracture, loose sur...

Examples

Embodiment 1

[0021] like figure 1 As shown, the airport cast-in-place composite road panel provided in this embodiment is composed of an upper layer 1 and a lower layer 3 made of engineering cement-based composite materials and an intermediate layer 2 made of dry hard concrete; the upper layer 1 and the lower layer 3 are both It is composed of water, cement, fly ash, quartz sand, HCSA expansion agent, PVA fiber and polycarboxylate water reducer, among which water, cement, fly ash, quartz sand, HCSA expansion agent and polycarboxylate water reducer are The weight ratio is 35:40:50:35:12:0.2, and the volume content of PVA fiber accounts for 2% of the total volume of the upper or lower layer. Among them, Portland cement of 42.5 strength grade is used for cement; first-grade fly ash is used for fly ash; and 90-mesh fine quartz sand is used for quartz sand. The thickness of the upper layer 1, the middle layer 2 and the lower layer 3 is determined according to the airport class and the required...

Embodiment 2

[0029] like figure 1 As shown, the airport cast-in-place composite road panel provided in this embodiment is composed of an upper layer 1 and a lower layer 3 made of engineering cement-based composite materials and an intermediate layer 2 made of dry hard concrete; the upper layer 1 and the lower layer 3 are both It is composed of water, cement, fly ash, quartz sand, HCSA expansion agent, PVA fiber and polycarboxylate water reducer, among which water, cement, fly ash, quartz sand, HCSA expansion agent and polycarboxylate water reducer are The weight ratio is 40:45:55:40:15:0.2, and the volume content of PVA fiber accounts for 1.5% of the total volume of the upper or lower layer. Among them, Portland cement of 42.5 strength grade is used for cement; first-grade fly ash is used for fly ash; and 100-mesh fine quartz sand is used for quartz sand. The thickness of the upper layer 1, the middle layer 2 and the lower layer 3 is determined according to the airport class and the requi...

Embodiment 3

[0032] like figure 1 As shown, the airport cast-in-place composite road panel provided in this embodiment is composed of an upper layer 1 and a lower layer 3 made of engineering cement-based composite materials and an intermediate layer 2 made of dry hard concrete; the upper layer 1 and the lower layer 3 are both It is composed of water, cement, fly ash, quartz sand, HCSA expansion agent, PVA fiber and polycarboxylate water reducer, among which water, cement, fly ash, quartz sand, HCSA expansion agent and polycarboxylate water reducer are The weight ratio is 30:35:45:30:10:0.1, and the volume dosage of PVA fiber accounts for 1% of the total volume of the upper or lower layer. Among them, Portland cement of 42.5 strength grade is used for cement; first-grade fly ash is used for fly ash; and 120-mesh fine quartz sand is used for quartz sand. The thickness of the upper layer 1, the middle layer 2 and the lower layer 3 is determined according to the airport class and the required...

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