A shale ceramsite permeable ecological concrete

Abstract

The invention provides a shale ceramsite pervious ecological concrete, which is obtained by stirring mixing of total cementitious materials, shale ceramisite, a water reducing agent and water. Specifically, the total cementitious materials include 22.4-34 parts by mass of cement, 5.6-8.7 parts by mass of coal ash and 1.5-4.2 parts by mass of silica fume. The mass part of the shale ceramisite is 35-95, the water reducing agent accounts for 0.2-0.4% of the mass of the total cementitious materials, and water accounts for 22-25% of the mass of the total cementitious materials. In addition to good water permeability, water absorption and breathability, etc., the shale ceramsite pervious concrete provided by the invention also has the characteristics of excellent heat preservation, shock absorption, fire resistance, water purification, gas purification and landscape effect, and can be widely used in the municipal field, the construction engineering field and water environment purification field.

Description

technical field

[0001] The invention belongs to the field of concrete materials, in particular to a shale ceramsite permeable ecological concrete. Background technique

[0002] The existing concrete, as the largest man-made building material, has brought civilization to human beings and destroyed the natural ecological environment at the same time. Traditional roads, harbors, slope protection and other engineering components are generally composed of ordinary concrete made of cement, stones, sand, steel bars and other materials. They are closed and impermeable, and plants cannot grow, completely destroying the natural water and soil environment, and causing significant negative effects on the ecological environment. influences. Because the enclosed concrete has no water permeability and air permeability, the surface temperature can reach 40 ℃ to 60 ℃ in summer, which intensifies the "heat island effect" of the city, and easily causes the accumulation of urban rainwater to c...

Examples

example 1

[0028] Select the particle size range from 3mm to 30mm and the bulk density to 350kg / m 3 ~450kg / m 3 , 0.1m with a water absorption rate of 9-11% 3 After shale ceramsite is fully soaked in water for 24 hours to reach saturation, it is taken out to make the surface of shale ceramsite air-dry, and it is in a saturated surface-dry state.

[0029] Weigh respectively 22.4kg of 32.5-grade low-alkaline early-strength type coal ash cement, 5.6kg of secondary coal ash, SiO 2 1.5kg of silica fume with a content of 85%, 0.2kg of water reducer, and 7.7kg of water.

[0030] First put the saturated surface-dry shale ceramsite into the forced mixer, then add the total cementitious material composed of cement, coal ash and silica fume and stir for more than 1min, then add half of the water used in the mixing ratio and stir for 0.5min, then put Mix 0.2kg of water reducer with the remaining water and add to the mixer, stirring for 1.5min. When the wet slurry forms a smooth and shiny coating ...

example 2

[0032] Select the particle size range from 5mm to 20mm and the bulk density to 350kg / m 3 ~950kg / m 3 , 0.1m with a water absorption rate of 9-11% 3 After the shale ceramsite is soaked in water for 24 hours to reach saturation, take it out to air-dry the shale ceramsite surface, and reach the saturated surface dry state.

[0033] Weigh respectively 34kg of 32.5 intensity grade rapid hardening cement, 8.7kg of secondary coal ash, SiO 2 4.2kg of silica fume with a content of 86%, 0.1287kg of water reducing agent, and 9.87kg of water.

[0034] First put the saturated surface-dry shale ceramsite into the forced mixer, then add the total cementitious material composed of cement, coal ash and silica fume and stir for more than 1min, then add half of the water used in the mixing ratio and stir for 0.5min, then put Mix 0.1287kg of water reducing agent with the remaining water and add to the mixer, stirring for 1.5min. When the wet slurry forms a smooth and shiny coating on the surfa...

example 3

[0036] Select the particle size range from 5mm to 20mm and the bulk density to 450kg / m 3 ~550kg / m 3 , 0.1m with a water absorption rate of 9-11% 3 After the shale ceramsite is soaked in water for 24 hours to reach saturation, take it out to air-dry the surface of the shale ceramsite, and it is in a saturated surface-dry state.

[0037] Weigh respectively 24.8kg of 32.5 intensity grade rapid hardening cement, 6.2kg of secondary coal ash, SiO 2 3.1kg of silica fume with a content of 88%, 0.1023kg of water reducing agent, and 8.2kg of water.

[0038] First put the saturated surface-dry shale ceramsite into the forced mixer, then add the total cementitious material composed of cement, coal ash and silica fume and stir for more than 1min, then add half of the water used in the mixing ratio and stir for 0.5min, then put Mix 0.1023kg of water reducer with the remaining water and pour it into the mixer, stirring for 1.5min. When the wet slurry forms a smooth and shiny coating on t...

technical field

[0001] The invention belongs to the field of concrete materials, in particular to a shale ceramsite permeable ecological concrete. Background technique

[0002] The existing concrete, as the largest man-made building material, has brought civilization to human beings and destroyed the natural ecological environment at the same time. Traditional roads, harbors, slope protection and other engineering components are generally composed of ordinary concrete made of cement, stones, sand, steel bars and other materials. They are closed and impermeable, and plants cannot grow, completely destroying the natural water and soil environment, and causing significant negative effects on the ecological environment. influences. Because the enclosed concrete has no water permeability and air permeability, the surface temperature can reach 40 ℃ to 60 ℃ in summer, which intensifies the "heat island effect" of the city, and easily causes the accumulation of urban rainwater to c...

Examples

example 1

[0028] Select the particle size range from 3mm to 30mm and the bulk density to 350kg / m 3 ~450kg / m 3 , 0.1m with a water absorption rate of 9-11% 3 After shale ceramsite is fully soaked in water for 24 hours to reach saturation, it is taken out to make the surface of shale ceramsite air-dry, and it is in a saturated surface-dry state.

[0029] Weigh respectively 22.4kg of 32.5-grade low-alkaline early-strength type coal ash cement, 5.6kg of secondary coal ash, SiO 2 1.5kg of silica fume with a content of 85%, 0.2kg of water reducer, and 7.7kg of water.

[0030] First put the saturated surface-dry shale ceramsite into the forced mixer, then add the total cementitious material composed of cement, coal ash and silica fume and stir for more than 1min, then add half of the water used in the mixing ratio and stir for 0.5min, then put Mix 0.2kg of water reducer with the remaining water and add to the mixer, stirring for 1.5min. When the wet slurry forms a smooth and shiny coating ...

example 2

[0032] Select the particle size range from 5mm to 20mm and the bulk density to 350kg / m 3 ~950kg / m 3 , 0.1m with a water absorption rate of 9-11% 3 After the shale ceramsite is soaked in water for 24 hours to reach saturation, take it out to air-dry the shale ceramsite surface, and reach the saturated surface dry state.

[0033] Weigh respectively 34kg of 32.5 intensity grade rapid hardening cement, 8.7kg of secondary coal ash, SiO 2 4.2kg of silica fume with a content of 86%, 0.1287kg of water reducing agent, and 9.87kg of water.

[0034] First put the saturated surface-dry shale ceramsite into the forced mixer, then add the total cementitious material composed of cement, coal ash and silica fume and stir for more than 1min, then add half of the water used in the mixing ratio and stir for 0.5min, then put Mix 0.1287kg of water reducing agent with the remaining water and add to the mixer, stirring for 1.5min. When the wet slurry forms a smooth and shiny coating on the surfa...

example 3

[0036] Select the particle size range from 5mm to 20mm and the bulk density to 450kg / m 3 ~550kg / m 3 , 0.1m with a water absorption rate of 9-11% 3 After the shale ceramsite is soaked in water for 24 hours to reach saturation, take it out to air-dry the surface of the shale ceramsite, and it is in a saturated surface-dry state.

[0037] Weigh respectively 24.8kg of 32.5 intensity grade rapid hardening cement, 6.2kg of secondary coal ash, SiO 2 3.1kg of silica fume with a content of 88%, 0.1023kg of water reducing agent, and 8.2kg of water.

[0038] First put the saturated surface-dry shale ceramsite into the forced mixer, then add the total cementitious material composed of cement, coal ash and silica fume and stir for more than 1min, then add half of the water used in the mixing ratio and stir for 0.5min, then put Mix 0.1023kg of water reducer with the remaining water and pour it into the mixer, stirring for 1.5min. When the wet slurry forms a smooth and shiny coating on t...