A method for recovering the strength of calcined concrete
A technology for concrete strength and waste concrete, which is used in the field of restoring the strength of concrete after calcination
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Embodiment 1
[0025] 1) After crushing waste concrete or construction waste, sieve to obtain recycled coarse aggregate with a particle size of 2.36 mm;
[0026] 2) After washing the regenerated coarse aggregate obtained in step 1) with water, soak it in water for 24 hours;
[0027] 3) After mixing sand, cement and fly ash, mix them with basalt fiber in batches to obtain Mixture I, then add coarse aggregate and water to Mixture I, and after fully stirring, pour concrete ;
[0028] The doping amount of the basalt fiber is 0.5kg / m 3 ;
[0029] The amount of water, cement, fly ash, water reducer, sand and coarse aggregate is 5.15 parts by weight of water, 13.72 parts of cement, 3.43 parts of fly ash, 0.0515 parts of water reducer, and 21.35 parts of sand. and 43.4 parts of coarse aggregate;
[0030] The coarse aggregate is composed of natural coarse aggregate and recycled coarse aggregate;
[0031] 4) The concrete in step 3) is cured for the first time at 17°C and the relative humidity is ...
Embodiment 2
[0033] 1) After crushing waste concrete or construction waste, sieve to obtain recycled coarse aggregate with a particle size of 10mm;
[0034] 2) After washing the regenerated coarse aggregate obtained in step 1) with water, soak it in water for 48 hours;
[0035] 3) After mixing sand, cement and fly ash, mix them with basalt fiber in batches to obtain Mixture I, then add coarse aggregate and water to Mixture I, and after fully stirring, pour concrete ;
[0036] The doping amount of the basalt fiber is 4kg / m 3 ;
[0037] The amount of water, cement, fly ash, water reducing agent, sand and coarse aggregate is 5.4 parts by weight of water, 14.56 parts of cement, 3.64 parts of fly ash, 0.0546 parts of water reducing agent, and 21.7 parts of sand and 44.1 parts of coarse aggregate;
[0038] The coarse aggregate is composed of natural coarse aggregate and recycled coarse aggregate;
[0039] 4) The concrete in step 3) is cured for the first time under the conditions of 20°C an...
Embodiment 3
[0041] 1) After crushing waste concrete or construction waste, sieve to obtain recycled coarse aggregate with a particle size of 19mm;
[0042] 2) After washing the regenerated coarse aggregate obtained in step 1) with water, soak it in water for 72 hours;
[0043] 3) After mixing sand, cement and fly ash, mix them with basalt fiber in batches to obtain Mixture I, then add coarse aggregate and water to Mixture I, and after fully stirring, pour concrete ;
[0044] The mixing amount of the basalt fiber is 5kg / m 3 ;
[0045]The amount of water, cement, fly ash, water reducing agent, sand and coarse aggregate is 5.4 parts by weight of water, 14.56 parts of cement, 3.64 parts of fly ash, 0.0546 parts of water reducing agent, and 21.7 parts of sand and 44.1 parts of coarse aggregate;
[0046] The coarse aggregate is composed of natural coarse aggregate and recycled coarse aggregate;
[0047] 4) The concrete in step 3) is cured for the first time at 23°C and the relative humidit...
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