A kind of permeable concrete prepared from foam concrete waste
A technology of permeable concrete and foamed concrete, applied in the field of concrete, can solve problems such as environmental hazards, waste of resources, occupying limited space, etc., and achieve the effects of adjusting the urban climate, ensuring the quality of engineering construction, and reducing mining.
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Embodiment 1
[0023] A permeable concrete prepared from foam concrete waste is characterized in that it is composed of the following substances in weight percent: 12% cement, 2.7% water, 75% regenerated coarse aggregate, 10% modifier, and 0.3% water reducing agent.
[0024] The recycled coarse aggregate is foamed concrete waste with an average particle size of 5.5 mm.
[0025] The modifier is composed of quicklime: calcined alunite in a weight ratio of 1:1.
[0026] The water reducer is a lignosulfonate high-efficiency water reducer.
[0027] The cement is 42.5 ordinary Portland cement.
[0028] First, mix cement and recycled coarse aggregate in a concrete mixer for 30s; then add modifier and water reducer and stir for 20s to make the powders mix evenly; then add water into the mixer and mix evenly to make a mixture A permeable concrete prepared from foamed concrete waste is obtained.
[0029] The prepared permeable concrete has a water permeability coefficient (15°C) of 3.1mm / s; a conti...
Embodiment 2
[0031] A permeable concrete prepared from foam concrete waste is characterized in that it is composed of the following substances in weight percent: 13.9% cement, 4% water, 71% regenerated coarse aggregate, 11% modifier, and 0.1% water reducer.
[0032] The recycled coarse aggregate is foamed concrete waste with an average particle size of 7mm.
[0033] The modifier is composed of quicklime: calcined alunite in a weight ratio of 1:1.
[0034] The water reducer is a lignosulfonate high-efficiency water reducer.
[0035] The cement is 42.5 ordinary Portland cement.
[0036] The preparation method is the same as in Example 1.
[0037] The prepared permeable concrete has a water permeability coefficient (15°C) of 3.5mm / s; a continuous porosity of 16%; a compressive strength loss rate of 11% after 25 freeze-thaw cycles, and a mass loss rate of 25 freeze-thaw cycles. 2%; 28d compressive strength is 31.2MPa; flexural tensile strength is 3.7MPa.
Embodiment 3
[0039] A permeable concrete prepared from foam concrete waste is characterized in that it is composed of the following substances in weight percentage: 16% cement, 5.7% water, 66% regenerated coarse aggregate, 12.15% modifier, and 0.15% water reducing agent.
[0040] The recycled coarse aggregate is foamed concrete waste with an average particle size of 9.5mm.
[0041] The modifier is composed of quicklime: calcined alunite in a weight ratio of 1:1.
[0042] The water reducer is a lignosulfonate high-efficiency water reducer.
[0043] The cement is 42.5 ordinary Portland cement.
[0044] The preparation method is the same as in Example 1.
[0045] The prepared permeable concrete has a water permeability coefficient (15°C) of 4.0mm / s; a continuous porosity of 19%; a compressive strength loss rate of 10% after 25 freeze-thaw cycles, and a mass loss rate of 25 freeze-thaw cycles. 2%; 28d compressive strength is 33.4MPa; flexural tensile strength is 4.9MPa.
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