A kind of sand aerated concrete block and its preparation method
A technology of concrete block and sand entrainment, which is applied in the field of building materials, can solve problems such as unsatisfactory mechanical and thermal properties, and achieve the effects of wide applicability, high mechanical properties, and good thermal insulation properties
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Embodiment 1
[0023] Take 135 parts of river sand and add water for ball milling to obtain fine sand with a sieving rate of ≥70% through an 80-micron sieve, and the mortar density is 1.62kg / L;
[0024] (2) get 38 parts of quicklime and carry out ball milling, obtain the quicklime powder of 90 micron sieve sieving rate ≥ 93%;
[0025] (3) Add successively 56 parts of cement, 38 parts of quicklime powder, 0.3 part of aluminum paste and 18 parts of gypsum in the mortar obtained in step (1), and stir to obtain the finished slurry;
[0026] (4) pour the finished slurry obtained in step (3) into a mold, the pouring temperature is controlled at 37-43° C., and the pouring viscosity is 30 cm; the finished slurry is precured in the mold for 3 hours to obtain a semi-finished sand aerated concrete;
[0027] (5) After stripping the sand aerated concrete semi-finished product obtained in step (4), carry out cross-cutting and longitudinal cutting to obtain the sand aerated concrete block semi-finished pro...
Embodiment 2
[0030] Take 120 parts of river sand and add water for ball milling to obtain fine sand with a sieving rate of ≥70% through an 80-micron sieve, and the mortar density is 1.65kg / L;
[0031] (2) get 32 parts of quicklime and carry out ball milling, obtain the quicklime powder of 90 micron sieve sieving rate ≥ 93%;
[0032] (3) Add successively 56 parts of cement, 38 parts of quicklime powder, 0.3 part of aluminum paste, 18 parts of gypsum and 40 parts of waste slurry in the mortar obtained in step (1), and stir to obtain the finished slurry;
[0033] (4) pour the finished slurry obtained in step (3) into a mold, the pouring temperature is controlled at 37-43° C., and the pouring viscosity is 29 cm; the finished slurry is pre-cured in the mold for 2.5 hours to obtain a semi-finished sand aerated concrete;
[0034] (5) After stripping the sand aerated concrete semi-finished product obtained in step (4), carry out cross-cutting and longitudinal cutting to obtain the sand aerated c...
Embodiment 3
[0037] Take 115 parts of river sand and add water for ball milling to obtain fine sand with a sieving rate of ≥70% through an 80-micron sieve, and the mortar density is 1.68kg / L;
[0038] (2) get 28 parts of quicklime and carry out ball milling, obtain the quicklime powder of 90 micron sieve sieving rate ≥ 93%;
[0039] (3) Add 52 parts of cement, 28 parts of quicklime powder, 0.25 part of aluminum paste, 14 parts of gypsum and 45 parts of waste slurry in the mortar obtained in step (1) successively, and stir to obtain finished slurry;
[0040] (4) pour the finished slurry obtained in step (3) into a mold, the pouring temperature is controlled at 37-43° C., and the pouring viscosity is 28 cm; the finished slurry is precured in the mold for 2 hours to obtain a semi-finished sand aerated concrete;
[0041] (5) After stripping the sand aerated concrete semi-finished product obtained in step (4), carry out cross-cutting and longitudinal cutting to obtain the sand aerated concrete ...
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