A kind of low resilience early strength liquid alkali-free accelerator and preparation method thereof
An early-strength, low-rebound technology, applied in the field of concrete additives, can solve the problems of large strength loss, alkali-aggregate reaction, environmental pollution, etc., and achieve the effects of improving mutual solubility, promoting cohesion, and improving comprehensive performance.
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Embodiment 1
[0024] To prepare low-rebound early-strength liquid alkali-free accelerator, the specific steps are as follows:
[0025] 1) In parts by mass, add 30 parts of water and 10 parts of diethanolamine to 60 parts of industrial aluminum sulfate, stir at 55°C for 1 hour until the industrial aluminum sulfate dissolves to form a stable transparent solution, and obtain a modified aluminum sulfate solution;
[0026] 2) Weigh each raw material according to the ratio in Table 1, and set aside;
[0027] 3) Add graphene oxide and water into the modified aluminum sulfate solution for ultrasonic dispersion. The ultrasonic dispersion time is 20 minutes to obtain a stable and transparent solution, and then mix and stir the performance regulator (polyacrylamide and silica sol at a mass ratio of 1:1 The obtained stable transparent solution), penetrant (sodium alkylbenzene sulfonate) was added to the obtained transparent solution, stirred at 55°C for 1.5h, and then added stabilizer (ethylenediaminet...
Embodiment 2
[0029] To prepare low-rebound early-strength liquid alkali-free accelerator, the specific steps are as follows:
[0030] 1) In parts by mass, add 40 parts of water and 5 parts of diethanolamine to 55 parts of industrial aluminum sulfate, stir at 56°C for 1.1 h until the industrial aluminum sulfate dissolves to form a stable transparent solution, and obtain a modified aluminum sulfate solution;
[0031] 2) Weigh each raw material according to the ratio in Table 1, and set aside;
[0032] 3) Add graphene oxide and water into the modified aluminum sulfate solution for ultrasonic dispersion. The ultrasonic dispersion time is 22 minutes to obtain a stable and transparent solution, and then mix and stir the performance regulator (polyacrylamide and silica sol in a mass ratio of The obtained stable transparent solution), penetrant (sodium alkyl sulfonate) was added to the obtained transparent solution, stirred at 56°C for 1 h, then added stabilizer (a mixture of phosphoric acid and s...
Embodiment 3
[0034] To prepare low-rebound early-strength liquid alkali-free accelerator, the specific steps are as follows:
[0035] 1) In parts by mass, add 35 parts of water and 15 parts of diethanolamine to 50 parts of industrial aluminum sulfate, stir at 57°C for 1.2h until the industrial aluminum sulfate dissolves to form a stable transparent solution, and obtain a modified aluminum sulfate solution;
[0036] 2) Weigh each raw material according to the ratio in Table 1, and set aside;
[0037]3) Add graphene oxide and water into the modified aluminum sulfate solution for ultrasonic dispersion. The ultrasonic dispersion time is 24 minutes to obtain a stable and transparent solution, and then mix and stir the performance regulator (polyacrylamide and silica sol at a mass ratio of The obtained stable transparent solution), penetrating agent (sodium lauryl sulfate) was added to the obtained transparent solution, stirred at 57°C for 1.5h, and then added stabilizer (ethylenediaminetetraace...
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